I'm a 3rd yr civil engineering student. These youtube videos are more efficient than 90% of my professors! Thanks to talented people running educational channels like this one. Thank you!
@@ProcesswithPat Haha! But all jokes aside, as a new engineer, I find your videos incredibly useful. I want you to know that your hard work is greatly appreciated, and I am looking forward to more videos in the future.
Haha .. The last part is quite accurate. I dont remember how many times I have explained to my non-engineer friends how to differntiate cooling towers and stacks.
Thanks, that’s the best explanation I’ve run across. 45 years ago while serving in the Marines part of my duty would be traveling through the hills in Virginia taking Wet Bulb readings for the base. The stations were near the Harriet Jets landing pads. Thanks again
A natural wet bulb thermometer (not physically aspirated) is used in Industrial Hygiene to measure heat stress (along with dry bulb and globe thermometers).
Excellent description. Here the dry western part of USA, swamp coolers are utilized to cool houses, but in the humid South with its high humidity, the same swamp coolers don't function as well as on the west coast.
Worked at power plants over the years, often training new folks. As an exercise, I would sometimes ask them how much water it takes to keep the cooling water system filled. At first, some would suggest very little since most of the water is returned from the cooling tower back to the plant. But if you have a large plant (say, 3000 MWthermal) and it's running about 40% efficiency, then about 1800 MWthermal is being rejected into the cooling tower. That's on the order of 800 kg/s evaporating. In terms for us in the US, that's over 12000 gallons per minute!!! And yes, the effectiveness varies a lot with the daily weather, which affects the return temperature of the water by quite a bit. Great video, with some great explanation.
Reactor water is recirculated. Nothing lost. That water is use to boil water in a separate system to create the steam to run the turbine generators. That water is then cooled in the towers and of course there is loss due to evaporation and must be replenished. That is why Nuclear Planst are located near a large source of water.
@@GeoffryWK I never said ANYTHING about 'reactor water', don't know where you got that idea. And BTW, BWR's boil the reactor coolant directly and there are losses in any steam cycle. And in a BWR, the 'reactor water' IS the steam cycle. Cooling towers are used in many fossil plants as well. Bascially ANY large steam plant has to reject a lot of heat to the environment and cooling towers are one way of doing that. Look for large fossil fueled plants and those too are near water sources.
Good lecture. Wet bulb temp, as I was taught, can never be greater than the dry bulb. Or at least the dew point can never greater than the ambient temperature.
just studied wet and dry bulb painfully and have a look on youtube I'm so happy to see someone can explain this so well thanks for saving my day i appreciated!
OMG finally someone that could explain the difference between wet bulb and dry bulb temperature clearly! I really really appreciate it. I understand now! Thank you very much.
Really nice and easy to understand explanation - thank you! I'd only add that the process doesn't start with water insisting on evaporating on its own. Heat energy moves from our skin or the thermometer bulb to the relatively cooler layer of water (which in turn is cooled quickly by the air temperature which is cooler than skin most of the time) because it has no choice about it (it has to follow the temperature gradient) and that's what makes us feel cooler (heat is being sapped from your skin). Then the increased heat content of that water causes it to evaporate which adds to the cooling effect as the warmed water doesn't stick around to create a new, insulative watery skin at the same temperature as your body.
Hey there! I’ve been thinking about this one for a few days… I’m considering the scenario where you have a bunch of water on a plate with air above it all at the exact same temperature… if you introduce bone dry air, also at the same temperature, the the water will evaporate and cool down the plate, even thought the initiating event wasn’t heat transfer from a hot surface to the cooler water. Bit of a chicken and egg scenario? Not sure…
This was a great explanation and I liked the simple but clear sketches - you made it easy to understand and remember the concept. Also, I enjoyed your final 'trigger' comment - I always wondered about those climate change images of towers spewing something - now I know, they're just cooling towers 'spewing' water vapour.
I finally understood. Thank you for the visual input, the practical examples and the clear explanation. If I might, I suggest you to change the title. This video wasn't my first choice because I was looking for an explanation for dry and wet temperature. Thank you again :)
Hello from Puerto Rico. I recently graduated Mech Eng. I loved thermodynamics, and the thermal sciences lab. But I didn't fully understand these concepts. You really brought them home for me with this video. You got a sub
Hey thanks man! I guess where your from you need the concept of wet bulb more than the average person huh? ;) Also, solidarity with your electricity situation, from a South African who faced similar issues!
@@ProcesswithPat indeed... The recent hurricane Fiona and heat waves have got me looking up low cost, off grid solutions for food refrigeration, cooling, clean water, heating, desalinization, etc. Thankfully, people like you make this educational content so we can understand these concepts better.
@@ProcesswithPat thank you for the solidarity. If I may ask, was your situation recent, or was it growing up?. I only know a few things about South Africa + I barely keep up with current global news
@@spongebobbatteries Nah it was mostly in the past. Moved to Denmark around 6 years ago for work. But I still have family &/ friends, so I am commenting more on their situation than my own. And yes, keeping up with what's going on everywhere in the world is impossible. Simply too much. That's why I obsess over my work instead :)
That is exactly what I wanted to know. Thankyou so much sir. I am final year mechanical engineering student and I really want to understand its physical significance.
As a chm engg. student m pretty impressed, how he explained it clearly while most books fail to do so.
I really appreciate that!
so true, thanks Pat
I'm a 3rd yr civil engineering student. These youtube videos are more efficient than 90% of my professors! Thanks to talented people running educational channels like this one. Thank you!
You’re the hero we need but don’t deserve
Basically a shitty Batman, huh? Pretty useless in a fight, and instead of money I have some knowledge about pumps XD
@@ProcesswithPat Haha! But all jokes aside, as a new engineer, I find your videos incredibly useful. I want you to know that your hard work is greatly appreciated, and I am looking forward to more videos in the future.
Haha .. The last part is quite accurate. I dont remember how many times I have explained to my non-engineer friends how to differntiate cooling towers and stacks.
Just a little joke, but there is truth to it, right!?
HIs last point was interesting!
Cooling towers scare me now because of the journalism. They look scary and big and smoky
Thanks, that’s the best explanation I’ve run across. 45 years ago while serving in the Marines part of my duty would be traveling through the hills in Virginia taking Wet Bulb readings for the base. The stations were near the Harriet Jets landing pads. Thanks again
This is the best explanation ever for wbt! you should return to making these awesome videos.
im glad you exist in YT. you really explained it well
A natural wet bulb thermometer (not physically aspirated) is used in Industrial Hygiene to measure heat stress (along with dry bulb and globe thermometers).
Great, thanks very much for increasing my understanding!
Discovered your channel nearly. Awesome content and quality. Please do more videos.
Excellent description. Here the dry western part of USA, swamp coolers are utilized to cool houses, but in the humid South with its high humidity, the same swamp coolers don't function as well as on the west coast.
Worked at power plants over the years, often training new folks. As an exercise, I would sometimes ask them how much water it takes to keep the cooling water system filled. At first, some would suggest very little since most of the water is returned from the cooling tower back to the plant. But if you have a large plant (say, 3000 MWthermal) and it's running about 40% efficiency, then about 1800 MWthermal is being rejected into the cooling tower. That's on the order of 800 kg/s evaporating. In terms for us in the US, that's over 12000 gallons per minute!!!
And yes, the effectiveness varies a lot with the daily weather, which affects the return temperature of the water by quite a bit.
Great video, with some great explanation.
Reactor water is recirculated. Nothing lost. That water is use to boil water in a separate system to create the steam to run the turbine generators. That water is then cooled in the towers and of course there is loss due to evaporation and must be replenished. That is why Nuclear Planst are located near a large source of water.
@@GeoffryWK I never said ANYTHING about 'reactor water', don't know where you got that idea. And BTW, BWR's boil the reactor coolant directly and there are losses in any steam cycle. And in a BWR, the 'reactor water' IS the steam cycle.
Cooling towers are used in many fossil plants as well. Bascially ANY large steam plant has to reject a lot of heat to the environment and cooling towers are one way of doing that. Look for large fossil fueled plants and those too are near water sources.
Finally I found TH-cam useful and productive
Explained far easier to understand compared to what was taught to me in my HVAC schooling.
Im an oil tanker captain. This was the basics of what i had to do. During my training many years ago. Well explained.
the part about the pictures of cooling towers being used in news about pollution is so true
Thank you!! Concept got clear.
Amazing expression. Thx.
English is my third language but I understand it 100% .
Awesome video. You should be a teacher. Great video. I'm an hvac technician. I love your explanation.
Cleared my basic concept
If you're not a professional educator, you should be. Easily the clearest, most effectively presented lesson on WBTs I've ever seen. Thank you.
Aha! I get it now. THANK YOU!
This is probably the best explanation I've heard for dry & wet bulb and I work in the AC industry as a mechanical engineer.
Hats off to u sir....great explanation...
Great concept explanation pat! Technical, yet simple and clear, 10/10 would recommend 👍
Super Awesome...elegantly explained
Good lecture. Wet bulb temp, as I was taught, can never be greater than the dry bulb. Or at least the dew point can never greater than the ambient temperature.
just studied wet and dry bulb painfully and have a look on youtube
I'm so happy to see someone can explain this so well
thanks for saving my day i appreciated!
Many Thanks for you detailed explanation
ANOTHER SOLID MOMENT IN HISTORY
Seems pretty epic!
First video that provides the explanation why not just what it is. Hats off to you, sir.
Conceptual Clarity in your explanation is outstanding...patience is a virtue
This is a goated explanation of this concept thanks bruh
Thank you so much.
I love this channel man. Keep up the good work
Studying for my prelim and I just did not understand my professors explanation in class, this totally cleared it up, thank you
Awesome! That’s why I did it. Best of luck for the prelim Kevin!
What a brilliant video. I explored that deep reason for a while. That is exactly what I looked for.
Epic Explanation. Your channel is really underrated!
Thanks man! I’ll keep at it!
simply.. legend❤
Thank you very much ,you really cleared my doubt.
Nice punch line. I am not alone in this :D keep the good work
Cool I finally understood this wet bulb nonsense lol
Thank you very much.... 🙏.... I will never and ever forget the concept. ❤️
Sir! God bless you. You have done a better job explaining than my PHD professor.
Great job explaining wet bulb! Thank you very much for this!
Thankyou so much sir!
This video is just perfect, now I understand the difference
What an amazing video one more time! :) We are looking forward to your next videos! :)
Amazing video Pat!
OMG finally someone that could explain the difference between wet bulb and dry bulb temperature clearly! I really really appreciate it. I understand now! Thank you very much.
excellent explanation
Kudos to you, this was the only video that explained it simply enough for me to understand!!!
Fantastic way of explaining . Got it
Wow this was very well explained thank you.
Really nice and easy to understand explanation - thank you!
I'd only add that the process doesn't start with water insisting on evaporating on its own. Heat energy moves from our skin or the thermometer bulb to the relatively cooler layer of water (which in turn is cooled quickly by the air temperature which is cooler than skin most of the time) because it has no choice about it (it has to follow the temperature gradient) and that's what makes us feel cooler (heat is being sapped from your skin). Then the increased heat content of that water causes it to evaporate which adds to the cooling effect as the warmed water doesn't stick around to create a new, insulative watery skin at the same temperature as your body.
Hey there! I’ve been thinking about this one for a few days… I’m considering the scenario where you have a bunch of water on a plate with air above it all at the exact same temperature… if you introduce bone dry air, also at the same temperature, the the water will evaporate and cool down the plate, even thought the initiating event wasn’t heat transfer from a hot surface to the cooler water. Bit of a chicken and egg scenario? Not sure…
Thanks from Bangladesh.
Best part is the thermocouple demonstration ❤️❤️
Super excellent 👏
A super clear video explaining the concepts and application of wet bulb temperature. Much appreciated!
Thank you. I never make TH-cam comments, but this was so helpful and well explained.
THANK YOU finally an explanation that makes sense. Thank you so much 😭
Absolutely brilliant explanation Sir
This was a great explanation and I liked the simple but clear sketches - you made it easy to understand and remember the concept. Also, I enjoyed your final 'trigger' comment - I always wondered about those climate change images of towers spewing something - now I know, they're just cooling towers 'spewing' water vapour.
The shower analogy was SO informative, great video.
I finally get it! Thank you so much for this.
Awesome! That’s why it’s there…
crystal clear explanation ☺
thank you
It’s also a more accurate temperature to know to define an extreme heat event
I finally understood. Thank you for the visual input, the practical examples and the clear explanation. If I might, I suggest you to change the title. This video wasn't my first choice because I was looking for an explanation for dry and wet temperature. Thank you again :)
I really enjoyed ,it was awesome!
Nice! That’s what it’s there for!
Cheers! Very useful. Much better than just reading the words in my book. :)
Finally proper explanation! Thank you very much for your time and effort!
Thank you. Very helpful. Excellently done. Graciously presented.
Hello from Puerto Rico. I recently graduated Mech Eng. I loved thermodynamics, and the thermal sciences lab. But I didn't fully understand these concepts. You really brought them home for me with this video. You got a sub
Hey thanks man! I guess where your from you need the concept of wet bulb more than the average person huh? ;) Also, solidarity with your electricity situation, from a South African who faced similar issues!
@@ProcesswithPat indeed... The recent hurricane Fiona and heat waves have got me looking up low cost, off grid solutions for food refrigeration, cooling, clean water, heating, desalinization, etc. Thankfully, people like you make this educational content so we can understand these concepts better.
@@ProcesswithPat thank you for the solidarity. If I may ask, was your situation recent, or was it growing up?. I only know a few things about South Africa + I barely keep up with current global news
@@spongebobbatteries Nah it was mostly in the past. Moved to Denmark around 6 years ago for work. But I still have family &/ friends, so I am commenting more on their situation than my own.
And yes, keeping up with what's going on everywhere in the world is impossible. Simply too much. That's why I obsess over my work instead :)
Excellent
Thank you for sharing your knowledge. I hope you are doing well.
An absolute genius....Great job Pat.
GREAT EXPLNATION! THANKS!
Thanks
That is exactly what I wanted to know. Thankyou so much sir. I am final year mechanical engineering student and I really want to understand its physical significance.
Thank you. Very well explain....
Lovely bro...You are the best teacher.....
Thank you so much for explaining the why thing
Trust me, it wasn’t obvious to me when I was studying… It only came afterwards!
Most of my concepts related to wet bulb temperature are cleared with this video. Thank you so much sir.
Nice! Make sure to check out the difference between wet bulb and dew point too!
Great explanation Thank you very much it helps a lot !!!!!!!
You deserve more subs😎
If that is so then I will get them eventually. Thanks for the nice comment!
amazing video for an HVAC engineer as well
Thanks, very helpful.
perfectly explained ..after going through multiple youtube videoa. I finally found a perfect explanation
One of the best explanation. a use of Whyyyyyy whyyyyy 👌👌👌👌
Great video, thank you for sharing.
Great explaination.... Please keep going.... A lot more better than the bookish explaination.
I alway had question, what is the significance of wet buld temperature today i satisfied with ur explaination
That’s what I wanted… Why is it not made obvious right at the beginning!?
Thank you so much you made it so crystal clear
Awesome, that’s why it’s there! Out of interest, was there something you didn’t get before watching? And if so, what was the confusion?
Well done sir! Please keep up the good work sir. Thnk u!!!
Good video....
This was a great video and was exactly what I was looking for. Thank you!
And this is how one should explain things☺️☺️
Glad you think so!
This was a great video … on point with the information very well understood
That is really a fantastic explainaition..... kudos!!!!!!!