If we get capacity as 144 kW, then we must divide by 210/60 = 3.5.. hence, we still get 41TR.. so what you have done is absolutely right.. there is no need to divide by 60. Either methods are correct.
It was the best video for psychometric chart numerical tomorrow is my exam and i am new to this topic thanx to you sir for teaching us through UA-cam.😊
It is very much interesting and knowledgeable video I have one ☝️ question what is the SHF formula is it H3 - H2/ H1- H2 ( shown in 5th question ) or H3 - H1/ H2 - H1 ( shown in 6th question )
An air conditioning system using 80% outdoor air and 20% recycled air has the following designed conc Indoor: 24°CDBT, 60% RH Outdoor: 32°C; 15g/kg water Sensitive heat gain 48kW Latent heat gain 16kW Air leaves the cooling coil saturated and is blown at 16°C DBT 236 (1 A) Answer the following questions 1. Give a synoptic air flow diagram of the described system 2. Extract the characteristics (DBT, WBT, H, RH, w, v) of both the internal and external airs fr psychrometric chart. 3. Calculate the mass flow rate of; a. The supplied air b. The recycled air c. The outdoor air 4. Find the characteristics (DBT, WBT, H, RH, w, v) of the air at the inlet of the coiling coil 5. If the by-pass factor of the cooling coil is 0.15, deduce the value of the contact factor. 6. Determine the surface temperature of the cooling coil. 7. Calculate the sensible and latent loads on the cooling coil. 8. Deduce the sensible heat factor (SHF). 9. Calculate the power of the cooling coil. 😢😢😢😢
Conceptual and physical understanding need to be focused while solving the problem. For Example : if the object is at 100 deg F temperature people know and feel what such a temp is. Such type of understanding required from your videos. .which will add more value to your videos and as well viewers understanding
Hey buddy, great video. Small correction. In 6min12sec, the unit of the mass flow rate should be kg/min instead of the m³/min of the volume flow rate So 185.2 kg/min
This type of problems like we have to find:- 1) total heat transfer in kw for air flow rate of 100 metrecube per min 2) bypass factor of cooling coil if coil surface temperature is 22 degree c
In question no. 2 the formula for heat added = mass flow rate *(change in h) But in question no. 6 heat added is just change in h. Is there any mistakes or any reasons for that?
Hi Sir. May I ask you questions? How if there's no relative humidity or one of those indicators is missing? And what specific table I should use to complete? Thank you
If the heating is to be from 30*C DB and 90% RH to 30*C. The cooling is to be from 27*CDB and 70% RH to 30*C. What would the moisture content (grams water per kg of dry air) be and the enrhalphy of the air (KJ per kg). How would this look like on the psychrometric chart? Thanks
Respect sir ,muje vapour pressure find karne mai hi problem aa rhi thi kyki mere psychometric charts mai bhi vapour pressure nhi dia h, Kya aap vo steam table ki link de skte h jo formula use kr k vapour pressure nikala humne
what if the pressure is not remain constant in this process ? for example: air compression by using a compressor. we know that, inlet pressure is 1 atm, and the outlet pressure is greater then.
in ur video, i've seen some problems which only temperature could change. could you explain, how to measure ratio humidity when the pressure is different (doesnt constant)
Psychrometry Chart is used for finding the properties of air at a single point but only when pressure is 1 bar.....but if pressure is not 1 bar then that problem can't be solved by using chart, we have to solve it by using seperate formulas of humidity ratio, heat added etc......to go in deep you can go through Ravi Kumar's NPTEL Roorkee lectures.
Can anyone please solve below An air conditioning system receives 3kg/s of Outside Air at 38o C with a dew point of 9o C (call this point A), which is mixed adiabatically with 7kg/s of Return Air at 27o C, Φ=80% (point B). The resulting mixture (point C) is then cooled until its specific humidity is 11.8g/kg (point D). It is then mixed with additional Outside Air (point A again) such that the new mixture is at the Supply Air condition of 25o C, Φ=50%. (point E) Using the psychrometric chart, (a) Determine the amount of heat removed from the system between (C) and (D) (b) Determine the mass flowrate of additional outside air required to get from (D) to (E) (c) Sketch the whole process on a sketch of the psychrometric chart.
Atul Singh.....that's why the answer is in per Kg. There no any data is given in that question related to mass flow rate.... And psychometric chart always shows the value in per Kg. I hope you got your answer.... Thanks for watching.
This is the best problem solving video I've ever seen, I swear. More power to you!!
ye sala sab galat chije hi padha ra hai
There is a correction at 9:40 in question-5 we got the capacity 8626 in KJ/min., So kindly divide it by 60 to get capacity 144 in KW.
IY zone bahoot badiya bhai.
If we get capacity as 144 kW, then we must divide by 210/60 = 3.5.. hence, we still get 41TR.. so what you have done is absolutely right.. there is no need to divide by 60. Either methods are correct.
He ha s done right becoz unit is kg/min
itni galti tumne ki hai ki kya batau
this video helped me to learn psychrometry very easily in just a fraction of minutes.thank you very much...keeping doing such videos again and again
This is the best problem solving video I have ever seen!!!
It was the best video for psychometric chart numerical tomorrow is my exam and i am new to this topic thanx to you sir for teaching us through UA-cam.😊
Best video on Physchometric chart ...keep up the good work mate
plzz be slow..and dont add background music to it plzz!👌
very useful video sir
especially before exams
thankyou MR I.Y.
pick 1 language per video. Aside from that...... spot on man.
Clear explanation of how to solve pyschometric chart questions...thanks
one of the best videos that i have ever gone through
It is very much interesting and knowledgeable video
I have one ☝️ question what is the SHF formula is it H3 - H2/ H1- H2 ( shown in 5th question ) or H3 - H1/ H2 - H1 ( shown in 6th question )
Both are correct......shf is a factor can't be negative, simply remember bigger value - smaller value
Very useful nd now i got confidence to attend these problems in univ xams
Really it helped because I was too confuse and tomorrow is my exam...😅😅 Thank you so much for this video..👍👍😊
great view with good and explained problems
thanks papa
your teaching concept is unique sir please be continue it helps someone
thankyou
You really helped me for tomorrow exam 🙏
Thanks for the explanation bro...👍
Very helpful.. better if the video with power point presentation.
1:59 Pv is coming out to be 0.0078 bar. By mistakenly you had written it 0.07926bar.
By the way best video I saw for this topic. Thanks 👍🏻
Sooooo Much Helpful...... Cleared Pyschrometry Doubts.... Thanks Alot.....
An air conditioning system using 80% outdoor air and 20% recycled air has the following designed conc
Indoor: 24°CDBT, 60% RH
Outdoor: 32°C; 15g/kg water
Sensitive heat gain 48kW
Latent heat gain 16kW
Air leaves the cooling coil saturated and is blown at 16°C DBT
236
(1
A) Answer the following questions
1. Give a synoptic air flow diagram of the described system
2. Extract the characteristics (DBT, WBT, H, RH, w, v) of both the internal and external airs fr psychrometric chart.
3. Calculate the mass flow rate of;
a. The supplied air
b. The recycled air
c. The outdoor air
4. Find the characteristics (DBT, WBT, H, RH, w, v) of the air at the inlet of the coiling coil
5. If the by-pass factor of the cooling coil is 0.15, deduce the value of the contact factor.
6. Determine the surface temperature of the cooling coil.
7. Calculate the sensible and latent loads on the cooling coil.
8. Deduce the sensible heat factor (SHF).
9. Calculate the power of the cooling coil.
😢😢😢😢
Thanks for making this video, it will help many. In question number two I bit confused regarding RH curve as you are covering 50% but writing 40%.
Covered many types, nice vid👍
Thank you brother it is really helpful
Conceptual and physical understanding need to be focused while solving the problem.
For Example : if the object is at 100 deg F temperature people know and feel what such a temp is. Such type of understanding required from your videos. .which will add more value to your videos and as well viewers understanding
Most powerful video. Thanks sir
Hey buddy, great video.
Small correction. In 6min12sec, the unit of the mass flow rate should be kg/min instead of the m³/min of the volume flow rate
So 185.2 kg/min
Pls upload a video on numericals related to ERSHF,GRSHF,RSHF...
Your teaching is amazing
Just slow down your speed, it would be easier to grasp!
Thanks for this video
This is best problem solving video
Thank you so much for this
You made my psychometry so easy
thank you so much sir you gave me 10 marks 😊
This type of problems like we have to find:-
1) total heat transfer in kw for air flow rate of 100 metrecube per min
2) bypass factor of cooling coil if coil surface temperature is 22 degree c
Quick and simple, thumbs up.
very useful video sir....please can you add some video on duct design by equal friction & velocity reduction method
Tq bro u explained well i can just answer by giving any questions
In question no. 2 the formula for heat added = mass flow rate *(change in h)
But in question no. 6 heat added is just change in h.
Is there any mistakes or any reasons for that?
I've also noticed it. Is there any mistake or not??
Anyone can explain it kindly..
Very helpful , thanks 👍
mostly question covered in this video, in easy way solve problem thank sir
more confidence gain by this video,
in this topic
awesome video sir psychometric problem is now solved
Thanks Yogesh.
Best lecture of psycometrichart thanks sir.
Nothing to say bro ...... excellent job
Best vedio for psychrometric chart
thank you alot this video helps me in my exam ❤️❤️
Pl make video on load conditions of psychometry.............
nice explanation...but there was some errors in viewing chart.but overall the concept was easily explained ..
wao this is called teaching.welldone sir....
You are the best teacher thankyou sir
The model is available on redslibrary website. One click and you can calculate everything without trouble. The model is in simulink model
very useful video sir
we want more question on this topic.
thankyou
Thanks Basant.
Pls advise how to calculate reheat for humidity control.pls give examples
Thanks a lot sir ...
I think it's enough problem
And happy teachers day sir
The video is really healful can you make a video, can you make a video on how to draw load line and mixture problems
superb work nd nice explanations keep it up..🖒🖒🖒
Thank you sir.........its good for understand ....bt how to find flow rate.....?
Thanks for Excellent lecture. I learned something.
Bro your explainatoin was superb
Hi Sir. May I ask you questions? How if there's no relative humidity or one of those indicators is missing? And what specific table I should use to complete? Thank you
Sir explain cooling with humidification process... Please
really helpful.. great work!! waiting for more such videos
Thank you for waching Ameya.
Can you please provide pdf of the psychometric chart you have used?
If the heating is to be from 30*C DB and 90% RH to 30*C. The cooling is to be from 27*CDB and 70% RH to 30*C. What would the moisture content (grams water per kg of dry air) be and the enrhalphy of the air (KJ per kg). How would this look like on the psychrometric chart? Thanks
Please give information about By pass factor
Sir..Plz upload more lectures of RAC..
Bhut hi bdiya video h. Sb clear ho gya
Respect sir ,muje vapour pressure find karne mai hi problem aa rhi thi kyki mere psychometric charts mai bhi vapour pressure nhi dia h,
Kya aap vo steam table ki link de skte h jo formula use kr k vapour pressure nikala humne
what if the pressure is not remain constant in this process ? for example: air compression by using a compressor. we know that, inlet pressure is 1 atm, and the outlet pressure is greater then.
in ur video, i've seen some problems which only temperature could change. could you explain, how to measure ratio humidity when the pressure is different (doesnt constant)
Psychrometry Chart is used for finding the properties of air at a single point but only when pressure is 1 bar.....but if pressure is not 1 bar then that problem can't be solved by using chart, we have to solve it by using seperate formulas of humidity ratio, heat added etc......to go in deep you can go through Ravi Kumar's NPTEL Roorkee lectures.
As here I am only focusing on the various types of problems which can be solved by using chart easily.
Sir please solve adiabatic mixing of steam without using chart but using table
Good examples, good explanation!
Very easily explained 📈
Can You Send me all the formulas related to this
which type of table follow to solve problem 1?
Very good video but please remove the background music please.........
How to find specific humidity or humidity ratio...Plzzz reply fast tomorrow is my exam of RAC
the best playlist
W=mv/ma, so how d=W/v is coming? Can you clear this doubt?
The sensible heat factor scale is also given in the chart, then without using the equation, how can SHF be found out using the chart only?
please remove the tuening from background it will good to hear lecture
in Q1. how u get the value of fie=0.3 .....?
Thanks your vedio help me in the exame . thanks
thank you for the video,helped me so much
excellent video brother....thank u soo much
very usefull video sir more que solve by book......thnks sir
Please no background music 🙏
Good job sir.
Keep uploading.👍
very helpful explanation sir
Can anyone please solve below
An air conditioning system receives 3kg/s of Outside Air at 38o
C with a dew point of 9o
C (call this point
A), which is mixed adiabatically with 7kg/s of Return Air at 27o
C, Φ=80% (point B). The resulting
mixture (point C) is then cooled until its specific humidity is 11.8g/kg (point D). It is then mixed with
additional Outside Air (point A again) such that the new mixture is at the Supply Air condition of 25o
C,
Φ=50%. (point E)
Using the psychrometric chart,
(a) Determine the amount of heat removed from the system between (C) and (D)
(b) Determine the mass flowrate of additional outside air required to get from (D) to (E)
(c) Sketch the whole process on a sketch of the psychrometric chart.
you are really savior for me. jai ho
Sir why we are calculating sensible heat factor? What is physical signifacance of it?
It determines the ratio of heat added for heating without humidification to total heat added.
@@anonymousman1282 😂😂 Now I'm perusing Ph.D
Great examples
Excellent teaching 😍😍
sir ..inclined line kaun se degree pr draw krenge??
Nice video sir please do some more videos also Thank you
Can someone suggest a video as good as this one in english??
Plz make more vedio like this
Good video...
Duct design ke bhi kro
sir question no-6 me heat added me mass flow rate kyu nhi multiply hua???jbki iske phle ke question me hua tha???
Atul Singh.....that's why the answer is in per Kg. There no any data is given in that question related to mass flow rate.... And psychometric chart always shows the value in per Kg.
I hope you got your answer.... Thanks for watching.
I have a doubt sir how can we find specific volume value it always take on the first point
Sir why the formula of heat added change in 2 different sum 3:18 & 12:12