Psychrometry lecture

[@bibhuprasadsenapati7549]

HIGHLY RECOMMENDED!!! rather than spending much time in nptel videos ,watch this to have a quick glance..... doubts cleared ....thank u sir.....

[@RohitChowdhury_sajaysaini]

Thanks for your valuable feedback.

[@mohamedeldaly2709]

amazing lecture. i never studied psychrometry before and need to for my fundamentals of engineering exam...this video was great! if i may add, i think that the reason unsaturated air does not take additional moisture during cooling is because *the vapor pressure is kept constant* as you cool it. since the vapor pressure is constant, the water mass is not added. once you get to the saturation line, the properties of the air change (from unsaturated to saturated) and this allows air to accept water.

[@anandmehto2542]

Great teacher 🙂I was scared from this topic before watching this video

[@aniljogia]

Too good,your way of teaching is fabulous,I am NIT pass out in 1988 ,but enjoy learning being in HVAC field .you are blessed with very clear voise too.Regards

[@AmbrishKumarAJE]

very very thanku , for making video for this problem type topic

[@RohitChowdhury_sajaysaini]

dme ambrish welcome..and be subscribed ,so that you dont miss any important video lectures.

[@yuvrajlad7507]

Very good.....and very simple concept to understand in our video...sir....thank you soooo much....thank you sir

[@RohitChowdhury_sajaysaini]

+yuvraj lad thanks for your appreciation.

[@mukeshkumar-pz8gg]

million of thanks for such a nice explanation sir.

[@sanaullahkhan9988]

Hi, Very good explaination, simple and the best. Thank you Sir

[@kameelhussaindakhani8325]

Sir too good. saves my lot of time by watching this.. Very helpful.. Thank you

[@RohitChowdhury_sajaysaini]

Kamilhussain Dakhani watch all the lectures of psychrometry to make your concepts clear..

[@srijibmukherjee1802]

Bhalo bujhiyechen sir. Any student would be grateful to have you as a teacher, just like we are. Thank you. Amazing teacher, you are.

[@manojdhanda9672]

Thank u sir for clearing my doubts. this is a very conceptual topic and without the basics in this topic u can not move an inch further

[@RohitChowdhury_sajaysaini]

Manoj Dhanda thankyou very much...your feedback is very much needed...now you can watch my all other videos in pyschrometry also...you will understand everything.

[@ravikumarkalamraju5044]

Extraordinary, I learned quickly, helpful in my job. superb....

[@manjubyahatti4397]

Wonderful lecture. So transparent. Looking forward for more such videos!

[@zeeshanahmed9719]

Sir I was just looking for WBT to understand it thoroughly and I found this concept clearing video. Thank You Sir

[@RohitChowdhury_sajaysaini]

Mohammad Zee sham thank you very much

[@sunilhiremathraichur]

Sir ur teaching skill is awesome n clear poin to point explanation hands off to u sir really great sir

[@challenger786]

Very interesting session. It is quite fruitful for me. Thanks a lot sir...

[@dossube]

This is a hell of video. Never saw any video that explain this concept this much clear. Thank you sir!

[@RohitChowdhury_sajaysaini]

+dossube thanks for your valuable feedback.

[@lovesongsandbabytvchannel8898]

Excellent explanation. Thank you for sharing your knowledge.

[@ankitpanchal5065]

totally understood the concept of pychrometric chart . Thank you sir.

[@RohitChowdhury_sajaysaini]

New video coming on how room air conditioner works

[@ravikumarkalamraju5044]

very good explanation, detailed and very informative.

[@yogeshthakur5308]

explained very clearly . .thank you.

[@rahulnikum9179]

Superb concept cleared lecture sir. . Eager to learn next lecture. . Thanks sir Please upload next video

[@RohitChowdhury_sajaysaini]

+RAHUL NIKUM dear already there are few more lectures on psychrometry processes... Watch them also

[@rahulsony2329]

wow #concept is full off thanks for this video sir

[@paknestrealestate4522]

sir this video clear my concepts.it's clear my all doubts. Thanks sir. well done Sir!

[@RohitChowdhury_sajaysaini]

Hussain Siraj thank you very much for Your valuable comment.

[@physicslover19]

What a great explanation thanking you sir🤗👍🙏🙏 you are great

[@jaberswamys4802]

Thank u sir for giving a valuable lecture. It's very useful for understanding the very basic concept regarding psychometry. Like these give more basic concept for mechanical engineering topics what u known.

[@SalmanKhan-kk9fl]

Perfectly Explained Sir . Thanks

[@sumitdhaygude7626]

Sir vedio is very good and easy to understand thanx

[@raymondsteele9529]

Thank you sir for sharing your knowledge on this concept! More power!

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k .

[@viveksingh4891]

Sir, please upload more videos.. Ur way of teaching is superb..

[@RohitChowdhury_sajaysaini]

Vivek Singh thank you very much. Currently you will get lectures regarding machine design ,som and fluid.

[@amitdhole8076]

amazing explanation.. jst amazing..each and everything explained very perfectly.. tysm sir..

[@jamesprabakaran6890]

Very simple explain sir and teaching simple english .Thank very much sir.

[@manivelprabhu5140]

Super sir need full thermodynamics lecture

[@suryanarayana7913]

I learn easily these concept.. Thank u

[@shivajimani8838]

Thank you for sharing your knowledge.God bless you.

[@martinvallejos1197]

nice...illustration ,now i can clearly understand the principles behind psychrometry. keep up the good work.ill be waitng for the next vid.

[@RohitChowdhury_sajaysaini]

Martian Lupe thank you for your support..I tried my best to explain

[@khushhalchandrakar5658]

Very good explanation sir ji, thankyou

[@recepbas9842]

very good .Thanks alot.

[@shivamganju9346]

Great lecture video...it made concepts very easy to be grasped.

[@mahendranb7609]

Really Excellent Bro.Clearly understood ..Thanks much

[@ramchandrakadam5266]

Nice lecture sir, it's crystal clear of psychometry, it is very important whose going to study air conditioning, salute you sir..

[@siddharamhatture7710]

Very helpful video frist time I understood something thank for making video keep continue to make more videos

[@iam_immortal]

Good effort sir...very nice explain

[@RohitChowdhury_sajaysaini]

+AAKASH KUMAR thanks for your appreciation.

[@rahulkoli09]

Very nice sir.. cleared all the concepts 👍👍

[@amrendrasharma5943]

I learnt what I've not yet. A Big hand to you. Thank you sir.

[@prasantakumar5314]

Really i would understand this typic only fr u. thank u bro.... please continue. ...

[@RohitChowdhury_sajaysaini]

Thank you very much

[@md.emrulplabon4127]

Very nice lecture. Thanks

[@RohitChowdhury_sajaysaini]

+MD.EMRUL PLABON thaknk you veey much for your appreciation

[@fariesmech]

If we add moisture to the air; the pressure will increase because of the mass of the moisture. It is understandable. But, when we add the moisture, how the temperature remains constant. The above point you have mentioned while explaining Dew Point Temperature.

[@solomon4866]

Thanks, I got the same question.

[@krishj8011]

nice video very useful...thanks

[@rajgosai6462]

Thank you very much Sir.. To giving us Practical knowledge..

[@mohitpharal9430]

Please release more videos your explanation is excellent

[@vyshnavinaidu3343]

Wow!!! Thanks a lot!! It's helpful..plz make more videos on chemical engg topics

[@RohitChowdhury_sajaysaini]

vyshnavi naidu thank you very much for your valuable comment.

[@SuneelKumar-cs5dm]

sir you are very very brilliant... because transformation skills is more effective.... thanks

[@abdulajij88]

Thanks Sir Informative lecture

[@mayurpatel111]

best lecture i have seen yet on psychometry

[@kirantraj8293]

Excellent teacher u have the right set of skill man ,to even teach even a dull headed person

[@RohitChowdhury_sajaysaini]

Thanks a lot for your overwhelming comment

[@kushagrakhandelwal7524]

Haha same

[@harishm2644]

Super explanation sirji... today I got very good ideas from your class..Ty

[@SahanChathuranga-k2e]

good explanation.thank you sir

[@abhishekratnam4388]

Awesome sir...I hvnt came across such a wonderful lecture on dis topic..hats f..u r doing a great job sir...

[@RohitChowdhury_sajaysaini]

Thanks for your support

[@abhishekratnam4388]

Its only bcz f ur video..I ws able to solve each nd every question related to dis topic in yesterdays exam...

[@niladrichakraborty3795]

Good Lecture..👌👍

[@ashokreddykonda4934]

please tell definition of relative humidity ,entropy,entholpy .your presentation is so good.thank s for nice explanation

[@Princekumar-ws5sg]

thank you very much from my soul.God bless you Great sir!.

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k

[@unmeshchavan455]

It is very good learn to humidity

[@sushilchoudhary5749]

Thanks for this informative video.

[@amatoallahouchen5894]

A brilliant explanation as usual, thanks a million!

[@reemalnaaimi7843]

All the way from Oman thank you so much for this explanation ❤️

[@RohitChowdhury_sajaysaini]

My father lives in Oman, thumrait

[@SatheeshKumar-le7cj]

Sir a great explanatory vedio .. How we can add moisture ..by keeping temp constant

[@greghart3243]

Great video! I hope you have gotten over your cold.

[@RohitChowdhury_sajaysaini]

Indeed.

[@Whopradeepgautam]

Fruitful Lecture. Please make the videos On thermodynamics and RAC topics with practical aspects.. Hope you will come with these above topics

[@RohitChowdhury_sajaysaini]

Thank you for your suggestions.

[@WikcramasingheVidanage]

water molecules which have higher energy than average energy of a molecule in liquid, escape from liquid region. as a result of that internal energy of the moisture on wet bulb. then temperature goes down . moisture on wet bulb absorb heat from the wet bulb. then wet bulb temperature goes down

[@manjunathameti1611]

thank u sir ,it is very is to understanding. sir can u upload all video respect thermodynamics...

[@RohitChowdhury_sajaysaini]

+Manjunatha meti yes I will offcourse upload videos on thermo as soon as possible...watch other videos on psychrometry also

[@anonymouslu1014]

thank you very much!!!!! this is very helpful, clear explanation, saved my from chem test

[@vatsaldabhi1145]

Thankyou sir.. Degree of saturation part was beautifully explain by yourside...⚡⚡⚡👌 Again thankyou.🙌

[@sumantiwari7881]

Well explaning sir👍👍 Thanks a lot sir 😊😊

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k .

[@KrishanSingh-gz9op]

But if I will apply the wet cotton , then the thermometer will measure the temperature of the wet cotton , not of the air. Secondly, when we have to take the reading of the wet bulb? when we apply the wet cotton , some minutes after that , or when the wet cotton dries. Thirdly, depending upon the temperature of the water in which the cotton is soaked in, the temperature of cotton will be different , which means the reading of wet bulb thermometer will be different everytime depending upon the temperature of the wet cotton. So we are only measuring the temperature of the wet cotton (or simply the temperature of water in which that cotton was soaked) and not the temperature or saturation of the air. Fourthly, whether the saturation of air is 0%, 10%, 20% , 30%.... 60%... or 90% ; after a particular point of time all the moisture of the wet cotton will be absorbed by the air. So , Isn't the fall in temperature measured by wet bulb will be same In all of the cases because the moisture is completely absorbed?

[@mohittiwari1990]

That's the real challenge...... Measuring Wet Bulb Temperature is not that easy...... Good experience is required. 1. Cotton is wetted with water that is at normal temperature. Neither hot, neither cold but at the same temperature that the Air actually is i.e. DBT. 2. Yes, Wet Cotton would become dry after sometime....... That's why the Wet Cotton arrangement is designed with a small container / tank that has enough quantity of water (water that is at DBT of Air). 3. As already said, Water is at same temperature..... DBT of Air..... So the Wet Bulb of thermometer will initially show same temperature that a Dry Bulb thermometer is showing....... But as the Air Flows over the WB Thermometer..... Due to Evaporation of Water (Evaporative cooling effect).... the WB Thermometer's reading will drop..... When the Evaporation rate becomes maximum....... The Wet Bulb thermometer's reading will stop dropping further and will become Stable...... That Stable reading of WB Thermometer is noted as WBT. So, WBT of Air will be either equal to or lower than DBT of Air....... How much lower will depend upon: Rate of evaporation of water from WB Thermometer...... Which depends upon...... How moist the Air initially is i.e. Relative Humidity....... High Relative Humidity results is low evaporation rate........ Thus WBT will be close to DBT........ Low Relative Humidity means..... High evaporation rate....... Thus WBT will be much lower than DBT. WBT Measurement needs a lot of care...... 1. Air flow rate over Wet Bulb should be within specified limits...... Not very high flow..... Not very low flow. 2. The Air once passed over WBT shouldn't keep passing over and over again (No close looping)...... Only fresh air should pass over Wet Bulb. 3. WBT Equipment should be kept away for Direct Sun Light / source of heat. 4. Air flowing over the WBT equipment should be the same Air whose WBT is to be taken. 5. Water used should be at same temperature i.e. DBT of Air...... If not same then as close to DBT of Air as possible...... One easy solution for this is to use the water that is exposed to the same Air /atmosphere for enough time...... Such water will be nearly at same temperature that the Air is. 6. Quantity of water should be enough to perform the test...... If water shortage occurs..... Wet Bulb dries out...... You will get DBT instead of WBT. 7. Reading should be taken soon as the reading becomes stable...... .................... .................... So on Now you would feel that taking accurate WBT measurement is really tough job........ Needs a lot of attention and care.

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k

[@RahulKumar-zr7zx]

Beautiful lecture . Enjoyed it

[@vishalpande6599]

Superb sir ....all clear

[@navdeepsingh5338]

awesome lecture. thanks man

[@RohitChowdhury_sajaysaini]

navdeep singh thank you very much...but see still 3 people disliked it..I don't what they did not understand in the video.

[@navdeepsingh5338]

Rohit Chowdhury don't care about dat but your lecture is great. Keep it up. God bless you.

[@shaukathayat749]

v nice method of teaching .

[@SaurabhKumar-ob7bc]

Amazing sir

[@syedminhajulhaque5611]

Thank you sir.Excellent lecture

[@makarchitects2953]

nice explanation. Thank you.

[@shaykhmujeeb125]

Rohit Sir, it was really amazing. I got my concepts cleared first time, these terms always confused me alot. 👏👏👏 Plz upload next video regarding psychometric processes.

[@RohitChowdhury_sajaysaini]

Mujeeb Ur Rehman Shaikh I have uploaded it dear..watch it ..

[@RohitChowdhury_sajaysaini]

Mujeeb Ur Rehman Shaikh kzbin.info/www/bejne/hJ6qqGCkYrGNkJo

[@RohitChowdhury_sajaysaini]

Mujeeb Ur Rehman Shaikh kzbin.info/www/bejne/iKHZiYGig96YerM

[@RohitChowdhury_sajaysaini]

Mujeeb Ur Rehman Shaikh kzbin.info/www/bejne/rWjQga2uf8-Zfqc

[@RohitChowdhury_sajaysaini]

Mujeeb Ur Rehman Shaikh watch these videos..all yours concepts will become crystal clear

[@sribalaji3159]

Keep making videos on mechanical engineering bro❤

[@mec-hi-techrock4257]

Thanx nice explanation..

[@gargichowdhury1237]

concepts got cleared

[@saranyaradj9474]

tq sir this video is really useful

[@menote4761]

Nice lacture sir and thank you sir

[@monsoontea5024]

Excellent explanation bro 😎😎😎

[@Sanjeetkumar98-]

Great sir ji great , real chanakya

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k ....

[@RahulMishra-vy9up]

Really u are genius sir

[@pepe8462]

I wish I had a teacher like you ;-;

[@shivareddyloka4960]

Thank u sir for telling in detail about psychometric properties..So i request u to do more videos on thermal field

[@VELMURUGANR1208]

Good explain :)

[@salman1987khan]

Simply the best ❤️👍

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k ...

[@aashishmishra4243]

Thanks sir you are genius

[@pranaypv6872]

Explation is up to the mark..😱😱😱😱

[@nikhilmc1658]

awesome class..got clear idea

[@arun4169]

Excellent lecture please upload summer air conditioner and winter air conditioner

[@edutechguruengineeringlear4280]

kzbin.info/www/bejne/rqHZfXR7r9elY9k

[@bansal1286]

Thank u so much... it helped me a lot💖!