2. Which Solar Pool Heater? - Homemade Vs Purchased
Рет қаралды 203,864
Күн бұрынNow I've made my own Solar Pool Heater (here • 1. How to make a Solar... )...
How does it Compare with a Purchased one?
PLEASE LIKE and SHARE ;-D, THANK YOU, this helps me make more content like this, and most importantly, stay safe.
CALCULATION MISTYPE ERROR - There is a mistype at 04:28 that shows 165Wh where this should have shown 165W/h (165W per hour) for the dome and 290W/h for the homemade panel as I wanted to show average power consumed over a 1 hour period for both devices. The actual Wh values would be calculated as: -
Wh = Joules / (60 x 60) - 60 seconds times 60 minutes
Wh = Joules / 3600 - 3600 seconds
Wh = 885,780 / 3600 = 246.05 Wh consumed over 1.5 hours for the Dome
Wh = 1,565,760 /3600 = 434.93 Wh consumed over 1.5 hours for the Panel
(Thank you for pointing this out Wouter 👍)
** June 2021 Update ** I have almost finished the second homemade solar panel from all the comment suggestions; this using mini-bore copper pipe mounted to an aluminium plate sprayed matt black on insulation material, then mounted within a wood frame with a glass sealed unit to keep the heat in. Please Subscribe and click the bell to find out if this one performs better. Thank you 😃.
In this video, I go into as much detail as needed so you can make an informed decision. Which one will you choose?
Here I show the following: -
How to calculate the energy output of each panel in Joules.
How to calculate Joules to KWh (Wh).
How much will a Solar Water Heater heat a 10ft (3.05m) pool over 7 days in the UK (calculated in Spring 2020)?
How much water each Solar System holds.
Plus I have only just realised that both panels Watt-hours reduce over the 1 and half hour test in the video, therefore if I added more water to the system, the Watt-hour value would be higher :-). I may put this in a part 3 and show some improvements to the panel.
Here, on my website, are all the items to build your own: - www.dev255.uk/what-i-bought
Music: www.bensound.com
#WelcomeToMyGarage
#dev255
#solarwaterheater
#solarpoolheater
#poolheater
#homeprojects
#summerprojects
#sommerprojects
#homediy
#homemade
#doityourself
#poolwaterheater
#athome
#comparison
@bentheteacher 3 жыл бұрын
great work! not only did you seriously outperform the commercial product, you did the calculations and reported the impact on the water temp of your system. best effort i've seen, well done
@Dev255 3 жыл бұрын
Thank you, it was a fair bit of work although was very interesting to learn the benefits, then from all the comments, possible was to improve efficiency even further this year. Glad you liked the content 😃
@bobjackson4720 2 жыл бұрын
I'm glad that your tests prove the home built heaters are worthwhile.
@StupidEarthlings 3 жыл бұрын
Thanks for showing all the work AND the testing. Most videos show a test of the 1st few min of water through hose. Any garden hose will give hot water for a short spell at 1st, its the full test that counts. 👍
@Dev255 3 жыл бұрын
No dramas, glad you enjoyed it, although I did go into even greater detail on part 3 😉 (my voice does drone on a bit in it though). I'm making another one at some point in the next couple of months using copper pipe, aluminium plate, sealed glass unit and Matt black paint. I will compare last year's one with the new design too. Thank you for your comment 👍
@ljn100 4 жыл бұрын
Really useful, thanks. I've been keeping an eye out for this follow up video after seeing the first one. I built a small panel using some scrap materials i had lying about as an experiment and was trying to figure out if it was worth it to build a bigger, better one. This is really helpful.
@Dev255 4 жыл бұрын
Hi, glad you liked the video, I didn't want to rush making it so I could answer all the questions from the last one and get all the maths correct. Thank you for your comment.
@KellenChase 3 жыл бұрын
I appreciate you doing the math on what one of these home made heaters can do.
@Dev255 3 жыл бұрын
Thank you, it was fun finding out and just wanted to share the results, you might like part 3 then, i's even more in depth 😀
@robertolago7406 4 жыл бұрын
Neatly done and explained. Very thorough. Thank you. Good job!
@Dev255 4 жыл бұрын
Thank you, I did a lot of research to ensure everything was as accurate as possible. Glad you enjoyed it.
@Someone-to1sb 22 күн бұрын
I built my home pool heater a bit different. I used 1/4 (6mm) irrigation tubing. The feed is a 3/4 inch pipe run down the length of one sheet of plywood (8 feet). I made 33 connections into the side of the pipe to attach the tubing. The tubing sections are 17 feet (just over 4 meters) and were snaked back and forth to a 3/4" pipe on the opposite side as the outflow. I added a timed valve that allows flow every 10 minutes. The output peaks at 125 degs f (52C) and is about 3 gallons per cycle. If I cycle it through continously into itself it quickly gets to be scaldingly hot..hence I do not do that nor do I allow the water to sit without circulation for more than 15 minutes.
@suedevonshire407 4 жыл бұрын
Very informative, will certainly be making one of these, to heat my garage.
@Dev255 4 жыл бұрын
That could keep your tools nice and warm ;-D
@tanwirkhan78611 3 жыл бұрын
One of the best I have seen soo far... Great 👍
@Dev255 3 жыл бұрын
Thank you 😀👍
@vplph 2 жыл бұрын
That is much more info I hoped for. Great job. Thank you.
@Dev255 2 жыл бұрын
You're welcome, thank you for your comment and for watching.
@dennisschuster2166 Жыл бұрын
Thank you for the calculations!
@huntawayfamily8040 2 жыл бұрын
Nice work. Found this whilst researching DIY panels for my 10ft pool. I was originally planning on a 4ft x 4ft panel with 60m of hose but I live in the North of England so I'll be taking your advice and go for an 8x4
@Dev255 2 жыл бұрын
Thank you, yes it's all about surface area exposed to the sun, keeping the wind off the surface and insulating the pool as much as possible to retain the heat overnight, you may need a fair bit of coverage further up North. Good luck with yours.
@terrystephens1102 2 жыл бұрын
A very interesting comparison, thanks. 😃👌👏👏👏
@pattiboychannel311 2 жыл бұрын
Very well illustrated, thank you gonna make one of these
@Dev255 2 жыл бұрын
Thank you, good luck with yours.
@rw3095 Жыл бұрын
Really informative and also precise! 👍
@Dev255 Жыл бұрын
Thank you, I do try to give as much information as possible
@mipueblo7042 2 жыл бұрын
Great video and presentation. That was really helpful. Thanks.
@Dev255 2 жыл бұрын
Thank you, glad you liked it
@dunrobincourt Жыл бұрын
Very detailed. Very helpful. Thank you.
@Dev255 Жыл бұрын
Thank you, I'm glad you liked it :-)
@jonathantatler 2 жыл бұрын
Excellent demonstration!
@Dev255 2 жыл бұрын
Thank you.
@theboosh86 3 жыл бұрын
Great video, was about to get a couple solar panels but now I may have to make one.
@Dev255 3 жыл бұрын
Thank you, I'm making a new one at the moment with copper piping mounted on an aluminium backing that is sprayed black, plus is mounted behind a glass sealed unit in a wood frame; the new one is more expensive, although may offer a little more heating. I'm still editing the video for that one though. Hope that helps
@paule6101 2 жыл бұрын
Great to see the data here - thanks!
@Dev255 2 жыл бұрын
Thank you, glad you liked it, there is more on part 3, although may send you to sleep, haha.
@rockjockchick Жыл бұрын
This was a seriously good video. Thanks!
@Dev255 Жыл бұрын
Thank you, no problem 🙂
@midnightcode 4 ай бұрын
Thank you for a good demostration and calculation, what is the best more flow at lower tempreture or low water flow at high tempreture?
@papakopa 3 жыл бұрын
great value ! thanks for sharing !🌝
@Dev255 3 жыл бұрын
Glad you enjoyed it!
@kosts13 2 жыл бұрын
Great work! Thank you.
@Dev255 2 жыл бұрын
Glad you liked it!
@RichardBaileyrichoncode 10 ай бұрын
If heating for pool, better to loop both with pool water in. And measure temperature out. Temp change times flow rate gives effectiveness. Closed loop allows temperature to rise higher thereby reducing the efficiency of heat transfer.
@BleughBleugh Жыл бұрын
Cheers, you’ve gained a sub! Have been pondering a DIY solar but , being nerdy, I have needed the numbers, 9/10 KZfaq vids just go ‘oooo, it’s hot, it works’ , which, I know isn’t necessarily good… Now, seeing your energy calcs, and knowing the energy needed to pump around a system, I can understand the efficiency, know how much pipe to use and automate based upon solar radiation
@Dev255 Жыл бұрын
Hi, thank you. Yeah, as you said there is little information with other videos, so I tried to put as much in as needed without too much. I did a follow up video that went more in detail too, I hope to do more in the future. It would be good to find out how your one does.
@umlooad 3 жыл бұрын
Interesting presentation, thanks
@Dev255 3 жыл бұрын
Thank you 👍
@FooTude 3 жыл бұрын
This is a real real world testing video! 👍 nice!
@Dev255 3 жыл бұрын
Thank you, I wanted to answer as many questions as possible, it gets a little geeky in part 3. Glad you enjoyed it
@SimonPlatten 2 жыл бұрын
Great work, we have a large intex pool, I purchased a solar heater last year which didn't work to well, however I plan to make my own this year following your guide, I also plan to surround the fool with insulating foil and will put this under the pool too. Presently the pool sites on decking which I plan to upgrade by putting composite decking on top, however I will put the insulting foil between the layers.
@Dev255 2 жыл бұрын
Hi, we were quite surprised at the difference between the two, where the insulation works well around the pool, plus keeping it covered when not in use helps too. We put the pool on foam garage matting last year and this helped too, plus made the bottom of the pool spongy so was soft when kneeling in the pool.
@pezomarko Жыл бұрын
please note that average power drops significantly when you do your bucket test with such a high water temperature, if you take into account only first 12 minutes with 5°C difference, you get about 500W average power for DIY, also, the difference between DIY and purchased one is significantly bigger because purchased one never reached 50°C at which point it's like having a radiator dissipating heat all over the place. Thank you for sharing your great work!
@Dev255 Жыл бұрын
Hi, thank you, that's a good point to note. If I do this type of test again, I will display a plot showing wattage, temperature and possibly heat loss over time to show how this is all related.
@tjam4229 Жыл бұрын
Thumbs up. Nice job 👍
@Dev255 Жыл бұрын
Thank you.
@mtharvey7502 3 жыл бұрын
Really useful and straight forward ... I too have the reflective outer so your video was 100% reflection of my circumstances. Off to the shops I go to make my own. Thanks
@Dev255 3 жыл бұрын
Hi, just for info with the latest info from my test. The pool of 4600 litres heats up by around 3 to 5ºC per day on a sunny day, so you need a good few days for it to warm up. It's a lot of water to heat and from my recent calculations both the panel and dome solar heaters generate about 25% of that heat, it looks like most of the heat is generated from the sun directly heating the water via the black cover over the pool and surrounding air. I think the panel is still worth it as 25% extra heat ensures the pool heats from day to day. The foil wrap around the pool helps too, where I only lose a couple of degrees overnight, where the pool is currently sitting at 28.12ºC at 08:47 in the UK. You can see the foil wrap in part 2's video and my intro video. Hope that helps
@charitymike1 3 жыл бұрын
Brilliant Dev....
@Dev255 3 жыл бұрын
Thank you Alf, glad you enjoyed it 👍
@christophmeirich5928 3 жыл бұрын
Thx a lot for sharing!!! Well done!!!! Greetings from germany Christoph 👍 👍 👍 👍 👍
@Dev255 3 жыл бұрын
Thank you Christoph, Greetings from the UK
@bertdoyle3413 3 жыл бұрын
Great video!
@Dev255 3 жыл бұрын
Thank you.
@gareng5599 2 жыл бұрын
Thank you... so I know about compare two system or design collector's.
@richardgore2000 2 жыл бұрын
Awesome thanks ☺️
@calvinhobbs89 10 ай бұрын
Why didnt u go with a all black back ground in the case? Thanks for info and a great video thanks for doing actual science
@harrrytoool1391 3 жыл бұрын
Had my first solar heated shower this morning. 1.5 metre square heat exchanger will give you enough hot water even on a cloudy day. Midday is best to have a shower. But realistically clear sun to the panel will give you morning showers. It’s important to mix the water. I have a bucket inside a bucket for this but you can add a hot cold mixer tap. Pumped water in small bucket in larger bucket, any over spill can then be heated with gas heating. Although black plastic irrigation pipe works in Uk temperatures vary so best to add metal heat sinks inside or copper pipes. Then insulate the inlet out let pipes.
@Dev255 3 жыл бұрын
That sounds like a very efficient system, plus I like the bucket usage. I should have my second panel running soon with small bore copper pipe mounted to an aluminium sheet all sprayed black within a frame and sealed glass unit. I have my 1st homemade solar pool heater connected to the same pool now and it's up to 21ºC today. Well done on your system.
@flexor212000 Жыл бұрын
Man. You guys in the UK are all in about heating the pool. I noticed a lot of products are geared towards you guys. It's almost always sunny and hot here during the summer but was looking for simple ways to heat. You guys have a harder time.
@Dev255 Жыл бұрын
Yep, you are right, we are always looking at ways to trap get that heat and trap it here in the UK. It's a great feeling to get in a pool of 30ºC and up in the evening when it's raining, especially if you've warmed it through solar.
@frankyparker6004 Жыл бұрын
Good one
@Bozemanjustin 11 ай бұрын
How cold is it at night that you lose temp? I'm in south florida and I cant picture losing much temp at night. So the LOW for tonight is 80 degrees, but current outside temp in the shade is 85, so in direct sun that would be 105 (they take our temp measurements in shade here, not sure if that is universal). Our ocean water here is 74 winter, 85 summer, but for native Floridians , we cant handle anything less than at lest 78, but prefer 80's min
@asusasus2300 Жыл бұрын
good job merci
@Dev255 Жыл бұрын
Thank you, merci
@alibro7512 4 жыл бұрын
Interesting video and proves a bit of enginuity is better than throwing cash about. I built a solar water heater a few years ago with silicon pipe squashed between two sheets of aluminium painted black. It was then enclosed in a wooden box with double glazed glass. I never did any maths on it but the water temp coming out could be 90 deg C.
@Dev255 4 жыл бұрын
Very true, I will be making another one at some point to see how efficient I can get it. Have you still got it, may be worth doing this test and calculating the power
@alibro7512 4 жыл бұрын
@@Dev255 Unfortunately I didn't build it strong enough and after a couple of years the wood started to rot and I had to take it down. The design seemed to work well enough but my implementation of it was not so good. It was too far from the hot tank so the losses were significant but it still gave us a tank of hot water on a good day.
@Badgerwatchers1 3 жыл бұрын
Hi Neil. Great experiment. Thank you. Just wondered if this water heater keeps on working through the winter months. I appreciate the sun is a lot less intense (or even out) and therefore the water will not heat up anywhere near as much but would it still raise the temperature of the water? And keep raising it day on day (up to a point, as it would drop at night, understandably) even with the mixed bag of weather that the uk experiences. I'm on the south coast.
@Dev255 3 жыл бұрын
I think this type would have to be far more insulated to retain as much heat as possible to raise the temperature in winter, plus fully insulate the water being heated. It may be possible with fully sealed units, where if it only raised the water by 0.5 Deg per week in the winter you are increasing/maintaining the summer heated water, although would lose a lot of heat when used. It's difficult to say. On another thought PV (photovoltaic) cells still work all year round, so there is plenty of sun and they are only up to 20% efficient, where solar water heaters can be up to 90% efficient, so I am optimistic. I will hopefully be making another panel this year with double glass sealed units to see if I can get more out of it.
@mattkinsella9856 3 жыл бұрын
Awesome video and a very accurate scientific comparison. I was considering making one of these to heat my pond in winter. Do you think they'd work in winter? I know the rooftop solar water heaters for household hot water are able to work in winter. Obviously I'd have to insulate and bury the pipework. I'd be really interested in a test on a cool and over cast day. I understand it would take a lot longer to work but would it keep the water temperature raised by 10 or 15 degrees if run all day in the winter?
@Dev255 3 жыл бұрын
Thank you Matt. They do work a little in the winter when the sun is on them, although it's more about the insulation of the panel, pipe and pool from what I've found, so with a pond you probably wouldn't see any benefit as the surface is exposed. It may keep the frost off the pond but may freeze the panel and pond if it gets too cold and could damage the panel and pump. I don't know why everything has to start with a P with this subject, haha. The household systems heat water to be stored in an insulated tank within a warm environment. I think the best option for your pond would be a heat exchange system to get the heat out of the surrounding air and put this in the pond, this is the reverse of a fridge effectively. Hope that helps
@mattkinsella9856 3 жыл бұрын
@@Dev255 Thanks for the detailed and considerate reply. I was worried about the whole setup freezing as well and/or cooling the pond on the really cold, dark and shortest winter days when the deepest parts of the pond are probably warmer than the surrounding air temp and I'd just be circulating that water around a freezing box.
@pfabra 2 жыл бұрын
Please compare your first gen with your 2nd generation! Great work mate
@Dev255 2 жыл бұрын
Thank you, I will be doing this later in the year when the UK sun appears ;-)
@kwerkyglass4173 6 ай бұрын
so which one was better? I couldn't figure it out
@mihaistroescu6563 3 ай бұрын
I just put a 1/2" green hose 100 m long in sun and heat 60 l of water in 30 minutes from 20 to 38 C for a garden shower. I had 50 for the garden and I bought another 50 m (10 USD). Recirculating water. It depends on the intensity of radiation. Maximum temperature was 46 C but for my shower is too much so I did not tried to increase the temperature with glass, insulation or other.
@jamespearcy7541 3 жыл бұрын
Hey great video. Think I will try making a solar pool heater this year. Noticed you have insulated the pool walls, what did you use? 😁
@Dev255 3 жыл бұрын
Thank you. The insulation is SuperFOIL from Amazon, I have a link to it on my website dev255.uk. it's radiator foil insulation. I will be making another one later this year too, hopefully improving its efficiency.
@chrisorr5223 3 жыл бұрын
Would love to see a video on that! Love seeing all the data and calculations, all the adverts for these solar heaters give unscientific claims like raise water by 8c. But over what time period? For how much water? No physics knowledge haha
@Dev255 3 жыл бұрын
@@chrisorr5223 Hi Chris, definitely, it was one of the reasons for making this one, Part 3 goes into even more detail
@smithbuilt 3 жыл бұрын
Nice video well presented. New subscriber
@Dev255 3 жыл бұрын
Thank you, glad you liked it 👍
@user-sb9cn7zc5v Жыл бұрын
Good job👍 Keep panel at 30 degrees😉👍 Also use coper tie wire to hold 10mm copper tube in place same as cable ties,as they will go brital and eventually crack with sun ect..
@Dev255 Жыл бұрын
Thank you, the cable ties are showing signs of degrading so I was looking at flat metal straps to distribute the heat a little over the pipes, it may melt the pipes if I forget to turn the flow on.
@mohammadwasilliterate8037 3 жыл бұрын
Great!
@Dev255 3 жыл бұрын
Thank you
@hashemshahin3219 2 жыл бұрын
many thanks it is very informative. what is the water pump that you use, I have a pool with chlorinated water, what do you recommend? cheers
@Dev255 2 жыл бұрын
Hi, thank you. The pump is a 240V pond pump that has an input and output pipe connection, which is ideal for having it out of the water, connected to the drain output of the pool. Here is the link www.allpondsolutions.co.uk/pond/pumps/full-range/1400lh/ It's a 1400 litre per hour pump that runs around 24W
@David-tt8qz 3 жыл бұрын
Thanks, great video. It would be good to also get an idea about the flow difference between both systems (liters per minute). Should the dome have a significantly higher throughput, it could warm up the pool as fast or even faster than the panel.
@Dev255 3 жыл бұрын
Hi David, certainly, I went into a lot more detail in Part 3 Here: kzfaq.info/get/bejne/kNqPhcx-zLmxdac.html, where the Dome was flowing at 9.1 litres/min and Homemade at 3.7 litres/min, although the homemade had a lot more surface area and could remove the heat from the pipes to transfer over to the pool a lot more efficiently.
@David-tt8qz 3 жыл бұрын
@@Dev255 Excellent ... exactly what I was looking for. Thank you 👍
@Dev255 3 жыл бұрын
@@David-tt8qz No dramas, feel free to ask questions, I normally answer within a day or 2
@fatherfoxstrongpaw8968 6 ай бұрын
the diy system had smaller tubes which means less mass to heat per inch of tube length which heats up faster. it also has slower flow rate which gives it higher "linger" time to exchange heat. apples and oranges. equalize or average these 2 variables and the difference is more accurate representation of efficiency per GPH.
@danielroden9424 3 жыл бұрын
fantastic! im going to make a pair of loops on a single 4x8 sheet of plywood and cover it with corrugated roofing panel. i also have some mylar film and i might make a reflector to increase the effective area without having to make another set of loops
@Dev255 3 жыл бұрын
Sounds like you have a good idea to get the most out of the system, I am currently making a copper pipe version with aluminium backing all sprayed matt black to capture as much energy as possible, all this behind a sealed glass unit. Good luck with yours, feel free to let us know how it goes.
@mohammadwasilliterate8037 3 жыл бұрын
I saw guys paint the inside of the box black to absorb the sunlight and make inside the box really hot as sun shines through the perspex,,,,,you don't want to relect the light basically....
@Dev255 3 жыл бұрын
@@mohammadwasilliterate8037 Hi, definitely, the idea of the reflective foil was so the heat doesn't escape out of the back. The new unit I have made this year is fully closed behind a glass sealed unit and has reflective foil, although this is now behind an aluminium black panel to collect more of the heat.
@phylodude Жыл бұрын
Math and physics for the win! Awesome.
@Dev255 Жыл бұрын
Thank you, you can't beat logic ;-)
@junk52 2 жыл бұрын
Excellent video and panel you built. You can tell you're an engineer. Now I'm looking to put a pool in at home (still unsure) but water temperature in the UK worries me. Yes on a hot day that panel works great but say like now in May where the weather has turned again as usual and overcast. How efficient is that panel then ? Could you do a test and video on that perhaps.? Do you keep your pool full all year and do you use that panel continuously off the pump whilst the pump is in use? Tia
@Dev255 2 жыл бұрын
Hi, thank you. Yes, we don't have much in the way of sun in the UK most of the time. That's a good idea to do a video on the effectiveness on a cloudy or out of season day, I will have to do one of those. We don't keep our pool out all year round, just over the summer season plus a few more weeks thanks to the solar heaters, although last year we had hardly any sun. The other point to note is to have the pool in a location where the sun is always on it and have a dark coloured floating cover as this will reduce heat loss and act as a heater also. We now have a retractable parasol to give us some shade when we all get in the pool too.
@junk52 2 жыл бұрын
@@Dev255 much appreciated Neil, thankyou for your reply.
@trotro1431 3 жыл бұрын
great job! an idea with a comparison with a black wood background ? thks for your job.
@Dev255 3 жыл бұрын
Hi Thank you, I'm just waiting on some components to make another for comparison; this will have a glass sealed unit, copper 8mm minibore pipe, aluminum backplate and insulation panel behind, all this enclosed in a wood frame and 18mm ply backed. I will be comparing with my other homemade one. Glad you liked it
@trotro1431 3 жыл бұрын
@@Dev255 A very quick answer ;-))
@Dev255 3 жыл бұрын
@@trotro1431 Thank you, I'm doing some video editing now and like to reply as quick as I can to comments ;-)
@TheMilitaryGardener 2 жыл бұрын
Hello, any chance I can buy your newest pool heater from you?
@Dev255 2 жыл бұрын
Hi, I wish I could sell it, although I need to do some experiments with it to see how efficient it is and also how chlorine affects the copper as there is some concern that the copper can corrode if the PH balance is off, I may have to try it with a heat exchanger, we shall see, just waiting for the summer to arrive 🙂
@TheMilitaryGardener 2 жыл бұрын
@@Dev255 Ok, thank you. I have a natural organic pool that is powered through solar, no chemicals at all. Let me know if you ever want to sell it, I’ll take it.
@Dev255 2 жыл бұрын
@@TheMilitaryGardener No dramas, if I sell it I'll give you first refusal.
@martinm2074 4 жыл бұрын
hi, thanks for informative video, i am planning to build solar heater too, i am checking which hose to buy as i found, that standard pvc hose has lot of chemicals, i want to have 60mtrs of hose 13mm as there no thicker one.i have intex 900galon pump, not sure if this can can pump it trough, if not i will buy 750w or 400w submersible pump.may i ask you ?do you have any idea if this will have enough power to heat up my pool? its 4500litres as yours.i will put coils in wooden box with glass on top.thank you for your time.i will update with my results once is done.
@Dev255 4 жыл бұрын
Hi Martin, I used UV-stabilised Micro-Drip pipe that I bought here: - www.amazon.co.uk/gp/product/B0001E3S5E/ref=ppx_yo_dt_b_asin_title_o02_s02?ie=UTF8&psc=1 And running a 1400 L/h pump at only 24W here: - www.allpondsolutions.co.uk/pond/pumps/full-range/1400lh/ The pump is more than capable of pushing the water through at ground level, where you will only need an increased Wattage if you are raising the water above the pumps capacity, where mine can pump to a height of 1.8m straight from the pump directly upwards (this is reduced the more pipe you add), although you should be fine your intex pump. 750W and 400W may produce too much pressure and your system would possibly pop with any blockage. I chose this hose for it's UV capability as I am leaving it in the sun and because the smaller the pipe, the more surface area the water has to absorb the heat from the pipe. good luck with yours.
@ChloexLashay Жыл бұрын
Great video! Could you do a comparison of the performance of a homemade solar heater vs a heat pump pool heater?
@Dev255 Жыл бұрын
Hi and thank you. That would be a good comparison, although I'd have to invest in a heat pump or hire one for that. It's a good idea for a future video.
@grahamh6444 4 жыл бұрын
Very good test :-) here is my effort. Struggling for a pump running 12volt but the first one I got has stopped working :-( I have a spare so see if that fails as well.
@Dev255 4 жыл бұрын
Thank you, I have tried 2 separate 12v pumps and both have failed. I think the problem is that I am choosing ones designed for momentary use (filling a sink in a caravan or having a shower), where they are not designed to run continuously. Also, these pumps are not designed for the high loads of pushing a large body of water around 50m of pipe. I have a 25W 240v pond pump attached to it now. I will be looking into a better 12v version and testing for the next project. Hope that helps.
@astral2040 3 жыл бұрын
Dev255 - Dev255 What i want to know is .. When will you be using a Flux capacitor ??? Amazing work Thanks
@Dev255 3 жыл бұрын
When the water speed reaches 88mph and the static charge on the pipe reaches 1.21GW ;-D
@basilkearsley2657 2 жыл бұрын
Like the scientific methodology
@Dev255 2 жыл бұрын
Thank you.
@benwolters 3 жыл бұрын
did you have to utilize a bypass valve to shunt the flow past the arrays during the night, thus eliminating the reverse heat sink effect?
@Dev255 3 жыл бұрын
Hi, I controlled it automatically by temperature sensors and a relay, so that when the centre of the panel dropped below 5° above the pool temp (ie pool at 20 and panel dropping below 25) the pump turned off. This worked during the day when the panel didn't get enough energy from the sun during cloudy periods and during the night. The panel had to be 5° or more above the pool temp for the pumps to turn on.
@josephward5180 10 ай бұрын
The experiment should have a bucket of water only as a control. Some of the temperature increase would be from the sunlight hitting the water as well as the ambient air temp., having nothing to do with the solar heaters. To calculate the energy output of the solar heaters, you would have to subtract the the temperature increase of the control group.
@darkchuky01CR 2 жыл бұрын
Good video, just one question, what about price? also the effort of the DIY vs Comercial. I'm thinking in changing the DIY of mine by 2 or 3 of those Domes, mostly because the one that was built in my roof is huge, I mean is like 2 times yours, but without all the quality of yours, I mean it's just 3 series of hose, and no plastic, so I know a lot of heat is being lost. But I think 3 domes will do the same or even better than the one I have, I want also to increase water flow, the one I have is draining it and I think is forcing the pump.
@Dev255 2 жыл бұрын
Hi, thank you, the panel cost £192.28 in total from all the parts. You may be better off boxing your pipes in and covering with perspex, plus improving the pump, this as most of the cost is in the piping. Or even reusing the pipe within your own homemade panel. I hope that helps.
@darkchuky01CR 2 жыл бұрын
@@Dev255 thanks I will try
@lAljax 2 жыл бұрын
Thanks for the video, I was thinking about creating a sort of heat battery using water pumped through a panel like this. I think a 220 liter drum 30 degrees above heating goal stores more energy than a Tesla power wall. This could decrease heating bills for small spaces.
@Dev255 2 жыл бұрын
Hi, Thank you, yes water is a good store of energy with a Specific Heat Capacity of 4182, as long as you can keep the energy from escaping (well insulated). So 220 litres of water would require 7.667KWh. The first version heater I made in this video produces 600W on average over an 8 hour day (a very clear sunny summer's day), so produces 4.8KWh per day, although, during winter months, it's fairly low (I do need to do a winter test with this one). Solar thermal is a lot more efficient than Solar Voltaic, as it directly heats the water rather than charging batteries, inverting to mains voltage and then heating through an electrical element (so many in-efficiencies), so should save your heating costs a fair bit.
@lAljax 2 жыл бұрын
@@Dev255 I have an idea for a solar heater that might scale up well enough. I was thinking about a system of multiple vessels, that can be pumped depending where you want to focus the heating, if storage is in the same room you want to heat, the "self discharge" would be heating itself.
@Dev255 2 жыл бұрын
@@lAljax Hi, I'm not sure I fully understand your system, although if it works on a small scale, then I'm sure it can be scaled up, it's only physics 😉. I'd say if you can make it, give it a go, would be interesting to see how it performs.
@kwerkyglass4173 6 ай бұрын
what mm size is the iope?
@PaulaOakman 2 жыл бұрын
Do you think two would heat best or use more tubing and make one very large one?
@neildevonshire2434 2 жыл бұрын
Hi, good question, I would say both, depending on your usage. I believe 2 would heat at a similar rate to one as it's due to surface area of exposed tubing, so if you are permanently fixing the heater, a larger one would be best as you will save space and materials. If you need to move them in and out for summer/winter, then multiple units would be more manageable, although require more connections. I hope that helps
@tipi306 11 ай бұрын
1 different which is also why the bought one heats less. Is the he amount of water going through. The homemade one will bottleneck your pump. Which can be countered. By a bypass valve. The domenhad 32 mm input. So you pump can put all his water through
@Andrzej_Misiura 25 күн бұрын
In my opinion there is no suprice if you heat less ammount (84%=16l)of water faster. And compare dimensions of pipes etc
@nate30 2 жыл бұрын
That's amazing your device is definitely superior but if I'm calculating right in that 1.45-hour time-lapse video the solar heater was only putting 300 watts of energy in that pool I know in a larger pool like mine I wouldn't notice a 300 watt heater working 24/7 much less only when it's sunny
@Dev255 Жыл бұрын
Hi, that does seem fairly small, although this was on a cloudy day, where the panel reaches 900W over mid-day during the peak of summer in the UK (around 950W per meter squared of sun energy, the equator is near 2000W, although it wouldn't be required there). The panels' average output over a good 8-hour day of sun is 600W, equating to 4.8kWh per day, this homemade one and the purchased one got our pool up to 31ºC with a good week of sun, where we were able to go in the pool overnight too.
@willememvula2940 2 жыл бұрын
i am building a biogas system, but i am using the homamde solar to warm up the water around the reactors, my query is it okay to use the metal plate as the base and then the polyethylene pipes for the circulation of water on top of the base or i should use the boards ford the plate as i have seen in some other DIY solar heater?
@Dev255 2 жыл бұрын
Hi, I would say that you want to heat the water in the boost efficient way, where I have used a wooden board to fix plastic pipe to that worked well and in the second version fitted copper pipe to an aluminium plate, although both the copper pipe and metal sheet are contained within a wooden unit. Ideally, what you wouldn't want is the pipe or metal sheet to be exposed to cool air blowing over it and robbing the heat energy that you need for your project. In my opinion, a black metal sheet that sat behind either metal or plastic piping would work well if it was all enclosed in an insulated unit, that also allowed as much light in as possible. I hope that helps
@willememvula2940 2 жыл бұрын
@@Dev255 Yeah it does, thank you. which one is best for sufficient or much power production. Is it a wooden board painted black perhapswith polyethylene pipe or a metal plate painted black with polyethylenepipes, because using aluminiu is expensive and the budget that we are given is small
@Dev255 2 жыл бұрын
@@willememvula2940 With a budget, I would say the best would be wooden board and PVC pipe. There is very little difference between the two in my tests. So the first design works well and will be 3 years old this year
@videogalore 2 жыл бұрын
So, perhaps (probably) a daft question, but does pump speed have any impact? I'm thinking if you extract the heat collected by the pipe too quickly then the coil has to start again from scratch - or does it make no difference as it's still passing the heat into the water as it passes through the coil?
@Dev255 2 жыл бұрын
Hi, not a daft question at all, in fact, one that is often asked. From all the comments and a little research, the pump needs to push water around relatively quickly to allow the flow to be turbulent so that all the water in the pipe comes in contact with the pipe wall, plus needs to remove the heat (transfer to the pool) quickly so that all the energy can be harnessed (more efficient); this because if it's allowed to heat up with limited flow the heating rate would slow down the closer it got to its maximum temperature. I run my pumps at full power (around 18W).
@videogalore 2 жыл бұрын
@@Dev255 Thank you for that, makes perfect sense! I wonder if this type of project was used in a school physics environment then it might be a helpful test that could first be calculated on paper and then actually tested in real life to see the effects of different setups (as you have done here).
@Dev255 2 жыл бұрын
@@videogalore That would be good for schools, happy for them to use any content 👍
@louisefox6671 2 жыл бұрын
Would I be able to run this using a 32w pool filter or would it need a seperate pump? Thanx
@Dev255 2 жыл бұрын
Hi, you should be fine with that pump, although it may restrict the flow through your filter and make the filter less efficient. I use the following pump and have it run outside the pool, with the input connected to the drain outlet so that the pool water pressure keeps it primed and the power remains outside the pool, plus the outlet just feeds through the panel then back in the pool over the side: www.allpondsolutions.co.uk/pond/pumps/full-range/1400lh/ I hope that helps.
@zino6661 3 жыл бұрын
I have similar solar heater, but my issue is finding a continuous duty pump that can handle Salt and chlorine for an affordable $. My pool is around 5000 gallons
@Dev255 3 жыл бұрын
Hmmm, good point, I've just had a good look around and the only one I found that seems decent for the price is the one on the link below, plus it uses 60% less chlorine so could save you pennies in the long run. I may even get one myself. www.swiminn.com/swimming/intex-salt-water-chlorinator-system-eco-5-gr-hour/137204461/p?id_producte=8899808&country=uk&gclid=CjwKCAjw9r-DBhBxEiwA9qYUpXmAA-cFmAYJaKI65LfHD9Kt1vC5O3vkydU_rUjCUW4ZdRZmseBdcBoCydwQAvD_BwE&gclsrc=aw.ds
@chrisorr5223 3 жыл бұрын
Great video! What about comparing to the intex solar mats? I’ve always they thought that they are cheapest way to get max surface area covered to capture the suns energy. Not sure what efficiency they are but for £80 you can get 4 which gives you 6m squared of coverage
@Dev255 3 жыл бұрын
Hi Chris, I think any solar heating without insulation from the wind is very inefficient, so they would probably be ok when there is no wind.
@martinchabre6984 Жыл бұрын
@@Dev255 I think that this is true only if you are trying to heat water at high temperature. For a pool the water stay relatively close to ambient temp so the solar mat would be at about the same temp as air surrounding it so not that much loss. I think insulation would just reflect some of the energy more that it would save from escaping.
@Dev255 Жыл бұрын
@@martinchabre6984 I've just got a thermal imaging camera, so hopefully I will be able to experiment with different setups and show which ones are best.
@ThatPhilBrettGuy 3 жыл бұрын
Your panel is probably working even better than you think (in watt hours) as due to the test generating high water temperatures, it will be losing heat faster as it gets hotter. Somewhere on KZfaq there's a video of someone comparing PV with an emersion heater and direct water heating and in colder weather. The PV won do to the heat loses in the other system.
@Dev255 3 жыл бұрын
Hi, certainly, once it was connected to the pool and I was measuring input to output temperature changes and have the exact flow rate the wattage was far higher, where the homemade panel got up to 900W last year. It may be worth you taking a look at my third video on this as it goes into greater detail here: kzfaq.info/get/bejne/kNqPhcx-zLmxdac.html. PV panels are only around 20% efficient at present and that is not taking into account the losses in cables to the heater or the heating element or connections. I believe the direct heating of water can be around 90% efficient.
@dropshot1967 3 жыл бұрын
As solar energy is proportional to the area used to collect it, You could also compare the area of both solar heaters to get an indication of the effectiveness with which the solar energy is captured. Overall this is one of the most efficient ways to heat a pool, it is a shame not more people use something like this. In the end, even though your build is more efficient, even circulating pool water through a black hose laid out in the sun (especially on a black surface like the roof of a shed) would have a measurable effect.
@Dev255 3 жыл бұрын
Hi, I agree these are very efficient, where the maximum calculated wattage (using input temp, output temp and flow rate) I measured from each panel was 988W (homemade) and 557W (dome). The homemade is 1.5m x 0.94m (1.41m2) and dome is 0.75m x 0.75m (0.56m2), so for efficiency (assuming 1000W/m2), the homemade at 701W/m2 is 70% efficient and the dome at 990W/m2 is 99% efficient. Although, 99% is very unlikely, so this is most likely the dome having more surface area. Still I am very pleased with 988W from a homemade panel, plus it averages around 600W on a sunny day (measured in June). My dad is currently making a black radiator version to sit on the garage roof to heat a radiator in the garage.
@Wingnut353 2 жыл бұрын
@@Dev255 So I guess if you had unlimited cash... and limited space the domes would make sense as you could gather 50% more power in the same area.... but in the end cost wins as the DIY one is much cheaper.
@Dev255 2 жыл бұрын
@@Wingnut353 Hi, yes that could be a good option from the above figures, although these dome heaters have gone way up in price, where one costs over £200 now. Could be a good experiment if I had the cash, sadly its back to making homemade ones.
@terimiles5699 Жыл бұрын
It appears that the homemade collector is about twice the size of the purchased one. Since the heating from the sun is linearly related to collector area, it is no surprise that the bigger one performed better. It should have actually been about twice as effective.
@Dev255 Жыл бұрын
Hi Teri, I though that too when I was making it, although the centre of the panel is redundant and doesn't transfer the energy to the pipes, hence my second version is a lot smaller, uses copper and has an aluminium plate to transfer that wasted energy space. The Dome heater is fairly inefficient in that the sun does not use the whole surface until it is directly overhead,. I am doing some more experimenting with it this year.
@marcelahurtado4100 9 ай бұрын
This solar heater really absorbers a lot of solar energy. With 500gal/hr pump, water temperature at the pump output can be 2-3 degree higher than that at the input.
@Dev255 9 ай бұрын
Thank you, I've learned a lot with these experiments, the main one being how efficient these heaters operate. There is so much we can do to harness more of the sun's energy.
@polyscient 3 жыл бұрын
What did you use for data collection and graphing?
@Dev255 3 жыл бұрын
Hi, I used an Arduino Nano and an Arduino SD card Read/Write module that logged all 10 sensors every 15 seconds. The file was not that big and created a CSV file (Comma Separated Values) for use in Excel. Excel handled all the data well and I was able to create the graphs from that. All the data, Arduino code and other related info can be found on my website Here: www.dev255.uk/what-i-bought I hope that helps. Neil.
@polyscient 3 жыл бұрын
@@Dev255 cool, thank you!
@markfabre7682 2 жыл бұрын
A bubble-wrap pool insulating blanket works even better.
@Dev255 2 жыл бұрын
I do have one of these as well, although find the wind blowing over the top of it takes the heat away quicker than it warming the water, maybe a clear cover over the top of the black bubble wrap would work better 🤔
@markfabre7682 2 жыл бұрын
@@Dev255 or better yet, clear bubble wrap and black paint or plastic film on the bottom. I prefer plastic film because during warm summers you could remove it to prevent you pool temperature from exceeding 100F. From experiment I ran on 3 different pools I owned when I lived in Florida, I found most heat loss is due to evaporation. Any cover over the surface that prevents evaporation goes a long way to keeping the pool warmer.
@Dev255 2 жыл бұрын
@@markfabre7682 Thank you, that makes a lot of sense, I try and keep as much of the water covered and insulated as possible when it's not in use.
@chrisjako3404 2 жыл бұрын
Do you run the pump to the solar panel at night?
@Dev255 2 жыл бұрын
Hi Chris, the pumps are controlled by an Arduino that monitors the temperature of the pool and panel, if the pool is cooler than the panel the pumps switch on, so the pumps do not run at night.
@chrisjako3404 2 жыл бұрын
@@Dev255 Thanks for the video and the response,- i have the exact same pool and am trying to heat it on a shoe string budget. I was thinking of adding the pump to a cheap wifi socket encase in a weatherproof box and then IFTTT it to the weather temp script for outside in my area. Also does the encasing make a massive difference other than just having the hose freely out in the open?
@Dev255 2 жыл бұрын
@@chrisjako3404 That's a really good idea, although indirect, the local weather is fairly accurate. The hose in the enclosure does make a lot of difference if the wind gets up a little as it cools the pipe before it get chance to transfer the heat to the water, where the air inside and purspex/glass cover creates a greenhouse effect for your piping.
@edition-deluxe 2 жыл бұрын
I don't get why they have different amounts of water? kinda like comparing a apple to a orange if they don't start with equal amounts.
@Dev255 2 жыл бұрын
Hi, I had that thought too when I made the video, although the maths takes this into account and the resulting Wattage would be the same if they had the same amount of water. Unfortunately I only had these two buckets, needed to make sure the pumps stayed submerged and the dome type held more water inside. The surface area is far greater in the home made panel due to having 50m of tubing and less water, so this is the reason for a higher Wattage output. I do go into a lot more detail in the 3rd part of these videos. Hope that helps.
@siemenscs 3 жыл бұрын
Dont know why you didnt use equal amount of water to begin with. Regardless of the heaters inner capacity the task would be for example to heat up 20 liters of water with both heaters.
@Dev255 3 жыл бұрын
Hi, yep the thought had crossed my mind at the time, although I only had these 2 buckets and settled on 19 litres and 16 litres due to holding the pipes in the buckets while pumping, it was a little frustrating doing that experiment haha. I have made a new one this year so will compare old to new using an identical setup for both systems.
@Yahgiggle 3 жыл бұрын
As expected because the home made heater covers a bigger area, now work out what heater makes the most heat from the sqm area it covers, you might find that for the size the home made one is less efficient, but maybe not.
@Dev255 3 жыл бұрын
Hi, from working this out last year the homemade one has more surface area exposed to the sun that is cooled by the water, in other words the water is taking that heat to the pool, whereas the dome is hot in between the pipes (there is a lot of space there) so not all the heat is being transferred away. I've made another version this year that looks to address all the issues of both and takes advice from the video's comments, I am just in the process of editing a few videos first before that one comes out.
@Yahgiggle 3 жыл бұрын
@@Dev255 sounds interesting 👍
@mrivieccio 2 жыл бұрын
Neil, do you sell yours? I’m looking to purchase one for my pool
@Dev255 2 жыл бұрын
Hi, I wish I could, although need it for more testing this year.
@mrivieccio 2 жыл бұрын
:-( Do you know of anyone that sells these types? I would love to support someone’s work.
@Dev255 2 жыл бұрын
@@mrivieccio Hi, unfortunately not, although you may have a "makerspace" near you that may possibly help. I hope that helps
@nazarrabi1585 3 жыл бұрын
All these years I havr been freezing my ass taking cold showers both in the mountains I didn't know you can get heat from the sun. Thanks jus like to know can you use any sort of glass
@Dev255 3 жыл бұрын
Hi Nazar, hopefully this will help 😉. I believe the best insulator to use would be a double glazed panel at the same size. Plus painting the backing foil black and building a wooden frame around it would be best. If you buil one, enjoy your warm shower 👍
@nazarrabi1585 3 жыл бұрын
@@Dev255 thank 👍
@akhtarkh Жыл бұрын
So your diy system is 194 watts whereas dome is 109 watts that day. Thanks for doing this test.
@Dev255 Жыл бұрын
Hi, no problem. Yes, the maximum power for the panel got up to an impressive 900W in the height of summer in the mid-day sun, where the dome produces a maximum of around 450W. These have been on our pool this summer along with the improved copper version and we have now seen 33ºC in our 3m pool with the 3 connected.
@akhtarkh Жыл бұрын
Neil, something I have not seen anyone investigsting is the difference between parallel tubes vs one loop for the same overall length of tubes. Theoratically parallel tubes fed from and into a manifold should be much efficient because the energy absorbed is directly proprtional to the temperature difference between two mediums. As the single tube loop length increases, the temperature difference decreases and hence the efficiency. Something you can make a video about.
@Dev255 Жыл бұрын
@@akhtarkh Hi again, funnily enough I'm doing exactly that with my second version, where the pipe in splits into 3 and re-joins on exit, plus I've mixed them up so that one loop runs in reverse to make use of the heat wanting to transfer to the colder tubes. Here is a link to my second version. I hope to get another video out in a week or so with more detail. Good shout though.
@oz93666 9 ай бұрын
I can see by your calculations Neil, your physics is pretty good. But this is not an effective way to compare. I would bet they are pretty much both similar in effeciency the important thing is the AREA collecting the sun light , the dome is much smaller so will deliver less power. The important thing to realise is the lower the temperature of the water (faster the flow rate) the more efficient the panel will be because a hot collector loses more energy to enviroment. So a fast flow rate is needed . This is the reason you got dramatically more power when running cooler in the other test 4:54 . Have a fast flow rate ( hence low input/ output temp difference) and this will deliver much more heat to your pool.
@Dev255 8 ай бұрын
Thank you. I agree, the rate of temperature rise is at its greatest when the temperature difference is also at its greatest. Also, I've learned that the faster flow creates turbulence in the tube that ensures all the water reaches the surface, which increases the transfer of energy; as opposed to laminar flow, where only the outside (skin) is absorbing the energy.
@WouterVandenneucker 3 жыл бұрын
Great video, one issue with calculating Wh though. Wh is watt*hours so it's already a cummulative unit of energy over time. 1 joule is 0.000277777778 Wh so that means that the dome produced: 246Wh and your system produced: 435Wh
@Dev255 3 жыл бұрын
Hi, yes I should have said average Watts per hour and not put Wh's on the calculations element. I will put this in the description. Thank you
@petertr2000 3 жыл бұрын
Power is in Watts: Joules per second. Your calculation already divided for the 1.5hrs giving you an average power output over your test time of 164 / 290 Watts. Compare that to the 2,000W heater in a lazyspa, for example - given this heats my 700L hot tub by about 1.5C per hour, looks like the solar heater you made would heat it by 0.2C per hour. Which is annoying, as I've just bought the kit to do something similar, but I see now that its just not going to work as the heat loss over night is about 8C, which the solar heater can't replace each day with even 8 hours of decent sunlight. Also, how much power is your pump using? If its more than 200W, then you're actually wasting your time entirely :(
@Dev255 3 жыл бұрын
The panel is averaging 600W on a good day and has reached 988W during mid-day and in June, so you should be ok. Plus my pool is currently sitting at 20.81ºC (9:20pm) with an outside temperature of 15ºC, the foil wrap around the pool helps with this. I get maximum 3ºC drop overnight and around 7 to 10ºC rise during a good sunny day. The pump is 24W, although I don't believe it is running at that, I could test it and find out. I've had the pool up to 30.8ºC in June also so may be getting some degree of heat from the pool cover. Your hot tub seems to have some inefficiencies too as it would only need 1.2kW to heat 700L of water by 1.5º over 1 hour. I'm working through all the logged data at the moment to create another video on actual temperatures measured, where I have an Arduino Nano at the pool and one at the house transmitting and logging 10 temperature sensors every 15 seconds. This writing a .CSV file so I can put it into a graph for the video and is where I have the values from. I think you will be ok with the kit you bought if it's similar to mine.
@petertr2000 Жыл бұрын
@@Dev255 Only just saw this! I bought 2 of those domes and I've had them daisy chained on the ground for a few weeks now as a test. They only seem to raise the water by 4-5C from their starting point, which is really poor I think. Its a very low rate pump I'm using, only about 1 litre per second - do you think this could be a limiting factor? I'd have thought it would just heat the water up more, but at a slower rate of throughput and that it would all even out in the end?
@ffjsb 2 жыл бұрын
Nice job, the only other thing I would've included is the money spent on each type of heater.
@Dev255 2 жыл бұрын
Hi, thank you the Purchased Solar Pool Heater cost me £109.99 back in April 2020 and the Homemade one cost £192.23 in materials; although the Dome version now costs £257.99 from the same shop vidaXL.co.uk. I should have bought more haha.
@ffjsb 2 жыл бұрын
@@Dev255 They're much cheaper in the US through Amazon, but they don't have a very good rating.
@Dev255 2 жыл бұрын
@@ffjsb I found they are fairly inefficient as you don't have all the dome exposed all the time, with a panel I found it much better.
@ffjsb 2 жыл бұрын
@@Dev255 Seems with much more surface area, they'd be more efficient than the dome. I wonder why someone isn't just producing the flat style pre-made.
@Dev255 2 жыл бұрын
@@ffjsb You can get a few flat ones, although not contained. The best exposed one for the money is the VidaXL one I believe, although not tried it. Here's the link: www.vidaxl.co.uk/e/vidaxl-solar-pool-heater-panel-80x620-cm/8718475037972.html
@kurasaki81 4 жыл бұрын
Why didn't you make the background completely black?
@Dev255 4 жыл бұрын
I didn't think of it initially, although I've since inserted a black filling to good effect and will be making version 2 when the weather gets a little better in the UK. Depending on the sun and time of day I am now getting around 600Wh, so it would be good to see the power gained in the summer.
@kurasaki81 4 жыл бұрын
@@Dev255 yeah I think you will have even better results. 😊 i am testing mine out today😄
@MORISSONA 3 жыл бұрын
Hi, where is your part 3 ? Regards Arnaud
@Dev255 3 жыл бұрын
Hi Arnaud, it's coming ;-), there is a lot of data logged (10 temperature sensors logged every 15 seconds over 7 days) so I am going through this, also making an intro video for my channel and a CNC conversion video. All this in the evenings and weekends... I wish I could do this full time. Are you looking for specific answers? Happy to help.
@MORISSONA 3 жыл бұрын
@@Dev255 hi Neil my pool is 8200 litters, i search an easy way to add à solar heater
@MORISSONA 3 жыл бұрын
@@Dev255 will that work with a shurflo pump ?
@Dev255 3 жыл бұрын
@@MORISSONA Hi Arnaud, that's a fair bit more water than I have, if it's an above ground pool you can use the existing pump, although for that size pool I would recommend a separate pump and around 150m of tubing in a large unit (as the one fitted may not be able to force the water around, possibly 75W version), you do get a bit of heating off the black bubble wrap solar covers, although if there is a breeze it takes some of that heat away.
@Dev255 3 жыл бұрын
I'm not sure on the shurflo pump, my first thoughts is that it's a fresh water pump, so may not cope with small particles entering it from the water, plus it's designed to provide showers, taps and toilets on vehicles (At 10psi). Also, it may be fairly noisy compared to a pond pump as it's a diaphragm pump, which may not be able to operate continuously. I think your best bet would be to contact a supplier on that one
@craigmcfly Жыл бұрын
I'd love to build my own but I just don't have the engineering skill or coordination.
@Dev255 Жыл бұрын
If you did give it a go and it was successful (I'm sure you could make it work) how would it feel every time you got in a warm pool? ;-)
@mickandrews9458 4 жыл бұрын
Thanks for video though your calcs are not correct. A joule is energy as is a watt hour but joules/time is power. 1J/second is 1W. 1wh=joulesx3600. I also think you have done your design an injustice. It would be better to simply measure temperature difference between water in and out with water in kept constant at the same temp as the pool. If water in rises then heat transfer from solar heater to water drops. It becomes less efficient. The same with flow rate. Too slow a flow rate and in out temp difference increases and efficency reduces. You have shown that the domed unit is poor. Its problems are too large a diameter pipe so reduced surface area to water volume ratio meaning poorer heat transfer. Also it is simply too small, I.e. surface area exposed to sun. It looks like pipes overlay each other too. Just on pumps. A pump quoted flow rate is for zero head, I.e. no flow resistance. Long thin pipes create significant flow resistance so one needs to look at pumps quoted head of water, how high it can lift it as well. But this does not seem an issue with your setup so long as temperature in out difference is not great say less than 10 degree Celsius. Would be good to see how much it improves if you spray the silver stuff black. Thanks.
@Dev255 4 жыл бұрын
Hi Mick, glad you liked it. Although I have to disagree with your statement, where my calculations are correct. The formula you mentioned of "1wh=joulesx3600" or Joules = 1Wh / 3600s, equates to 0.0002777778, which is used as a conversion factor to convert joules to Wh when the work done is only over a 1 hour period; although the heating work done was over a 1.5 hour period. So 885780 Joules x 0.000278 = 246Wh if the work was done over 1 hour, where as it was done over 1.5 hours, it is therefore 246Wh / 1.5 = 164Wh. Or as I had it Wh = Joules / (3600 x 1.5). As you said "joules/time is power" where 164W of power was sustained over 1hour (which is 164Wh), and then continued for a further half hour, but was still at a rate of 164Wh. We know that the power fluctuated by an amount above and below the 164W (because the sun is blocked by clouds), although this was the average over that time period, hence why I called it "average power" in the video. I have since filled the center of the panel with scrunched up black bags (also increasing the surface area) which has increased the output of the panel. I am currently making a transmitter and receiver pair from the pool to the house that incorporates 10 temperature sensors and a data logger so I can accurately track the individual temperatures and produce a detailed video on that; this will also measure the in and out temperatures of both heaters as you mentioned. Plus this has a relay output to turn the pumps off if the panel temp drops below the pool (with a hysteresis loop). Hope that answers your comments :-).
@petertr2000 3 жыл бұрын
@@Dev255 Nah, you've still got it wrong. Power is an amount of work in an amount of time. The dimensions of power are energy per time. In SI units, Watts = Joules per second. Wh would have dimensions of (energy per time) * time, which takes you back to simply energy with a multuplying factor added to it. 1wH = 3600 Joules. Plain and simple energy, not power. That's why the electric company bills you for your Wh usage. They don't care how quickly you used the energy, just how much it was in total - 1 kWh is a "Unit".
@Dev255 3 жыл бұрын
@@petertr2000 Agree with your maths, that's why I divided the Joules by the time in seconds to get to the Watts, where 1Wh = 3600 Joules is the same as 1W (work done in 1 second) x 3600 seconds (1hr) = 3600 Joules and in my case 1W x 5400 seconds / 1.5 = 3600 Joules, therefore 164 Joules per second x 5400 seconds = 885600 Joules and to get to Wh it's Joules / time (s), therefore 885600 (885780 in the video) / 5400 seconds which = 164Wh. It's the Wh in the same statement as average power that is confusing people I think, should have just put W and everything would be ok😉 , I believe the calculations are all correct and everything works out (unless my logic has gone fuzzy🤔), happy for you to prove me wrong with figures 👍 and I'll eat my hat. Maybe I'll do the next test over just 1 hour. It's a fun subject and love the feedback, will you still be making yours panel?
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