What's the duty cycle of a dehumidifier? Usually it's not perfectly efficient, so the temperature goes up a bit while the absolute humidity goes down

So is a swamp cooler essentially moving left along a line of constant enthalpy?

Cool I finally understood this wet bulb nonsense lol

amazing video for an HVAC engineer as well

Great 👍🏻 thanks. Could you please prepare a similar video for air as a fluid and required blower head

Been trying my best to flip the axis on Google Docs, but for the love of God , I can't figure out how to do it. Can you please point me to the right direction.

Hi Pat, in the formula of Cv value, where the number 27,3 comes?

very truly helpful, thanks

Thanks for the American translation - I almost passed out converting Celcius in my head

Hey pat the way you simplify and explain things is just so helpful ...why did you stop making these videos man, we want our passionate process Engineer back man

Thank you for addressing very basic but highly confusing problem. 👏

What is the meaning of the ( reactor) ? Anyone can help, please. is it a component such as valves, or is it a pressure generator?

Great video.. So here is a question. Using variable speed centrifugal pumps for swimming pools. When the pump is above the pool level (suction lift no gravity feed) sometimes pumps loose prime. Will installing smaller diameter pipes increase pressure to the pump head preventing loss of prime. So 50mm pipes to pump head 63mm discharge?

Show me where on earth 10 degrees wet bulb temp is , in your words , "a scorching hot day". Go on . WHERE.

Great explanation!

They just look big and scary, but they are actually good girls.

Hi i am i bit confuse .. so you have 2 cylinders high pressure and Low pressurecand in middle you have a Pressure regulator .. so when i open the Pressure regulator what will happen if i open the Pressure regulator??? Cna help me what isbthe answer thanks

No such thing as suction pressure, suction causes vacuum

One of the best examples I’ve found so far thanks.

Ye video Hindi me chahiye

Come back with a new video! We miss you! ❤

Every prospective engineer should watch this. It is insight that applies to every field of us problem solvers.

Hey Pat do you have any suggestions on a book that you could recommend for piping systems and pumps

Excellent explanation For me the system curve can be defined as a function of the recycle flow, the pruduct flow or the pump flow. It just depens on what flow is important in the process. But maybe the system curve definition is based on the pump flow because the definition is maybe based on a simple example without recycle line. Thank you Pat !

6:37, I pause the video at a bad instant (Step 2: Get the f...) and it sounded like you were about to say, "Step 2: Get the duck 0ut" 😂

Very well explained. This was the first time I had this explained as you did. I will have to watch again, but it is helping me for sure. Peaceful days to you

the stock footage with hard hats in the office... lmao

Great video

fire background setup man, fr

Excellent video , continue making such cool, scientific stuff.

I'm a retired research chemist of 35 years. I found that I should have gone unto Ch.E because I was really interested in the process more than the chemistry.

I worked with Ph.D level engineers. Less than Ph.D is just a technician in their mind.

Hi pat, there is a Korean youtuber working as a nuclear confusion design engeer. His channel name is Nixmars. Just want to share with you in case you are interested.

Hands down the best video explaining the Psychrometric chart. Great job!

We need some more videos, these are great!

When I pump horizontal, how do I know how long my pipe can be? I want to pump water 100 - 200m through the garden (downslope) in pipes that maintain some pressure for the sprinklers. I understand this height (Hm) now a bit, bit i haven't figured out how to calculate how strong my pump needs to be to keep pressure for 100 metres of pipe. Can anyone explain?

Very nice.

Pat, thanks for this video. Could you do a video of pump head calculation in the situation where on the discharge side, several lines connect to the main discharge line ? For the pressure drops should we consider the total flow rate for the section of the main pipe after connection of the other pipes ? And/or should we consider also the head of the pumps from other lines than connect to the main one ? I realized that everybody knows how to calculate pump head in the easiest scenario (2 tanks, 1 pipe, no other connections) but no one explains how to deal with connections. Have a nice day !

Chemeng student here, I’m a little bit confused. I thought the reason that liquid evaporates at toom temperature is because the fugacity of the component in the liquid (P*i times xi) is greater than in the atmosphere (P times yi)

1:10 music name ?

Hi Pat, thanks for the viedo. Why inreasing the suction pressure will also increase the flow rate ?

Chemical Engineer here Working online as a consultant

fantastic Video

Holy moly, this makes me ask so many questions as I’m trying to devise my pool pump location, supply nd return piping . Parallel nd singular pipe options. Nd you gave me all the answers I need. Bravo , very happy you nd your channel popped up in my feed , while looking into flow , diameter nd pumps. Thank you again