Sizing a Heat Exchanger: Counter-Flow

[@akram4139]

I've always had trouble with those calculations until I found your videos it's very helpful and easy to understand, Thank you so much🌹

[@ANJA-mj1to]

Well done! So clearly explained and given numerical results of this example. Effectively given a report to insure realiability indirectly compared to the correlated cases.

[@norbertopanes7262]

Excellent presentation. Very informative. Thank you for sharing.

[@manuelsegundo8285]

Thank you for posting these videos. They have been very helpful in understanding HW problems for my heat transfer class. Great work.

[@aacmbirdzilla2343]

Excuse me, with which method you used to find q and and U?

[@mohamedkhamis8772]

How can I calculate the dimensions of steam air forced heat exchanger? I need to deliver 60c in a chamber with 27 m3 - steam temp. 130c

[@Fsa839]

How did you find the overall heat transfer ccoefficient without knowing k for conduction resistance?

[@LearnChemE]

+Fsa839 Great question. This should be more clear, but we assumed no conduction. This is explicitly written out in the screencast on sizing a parallel flow heat exchanger, but not here. I will add that in. Thank you again.

[@travandcor2771]

tum a gaye ho

[@ravindradarji8403]

Which method you are find q because Area of heat exchange not available

[@LearnChemE]

Thanks for your question. In this case, q was found in the parallel flow screencast here: kzbin.info/www/bejne/m6vIg36nnql6oqM.

[@haniskhalid7614]

Hi, i need to design Heat exchanger for my project. The hot stream temperature is 75 and 25 for inlet and outlet respectively. heat duty is 4.018 kW. now i'm planning to use water to cool down the substance. But i don't have any info on its properties. I've read that maybe 21-22 deg C is an ideal for the inlet. but i can't determine the outlet because i don't have the flowrate of the water. so how am i supposed to determine the flowrate or the outlet temperature? Please help, i'm stuck because i can't even calculate the LMTD

[@monzeral-hafez9185]

thanks again but do you have a video with the exchange of refrigerant to water like in ice bank? thnaks

[@matanassor1700]

Do we need to know if the fluid go liminar or turbulent?

[@axeld9108]

indeed, to calculate the value of "h" but in this case it was provided

[@justinhoff4517]

If h is not provided you may calculate Reynolds number then find a proper nucelt corrolation based on Reynolds number and the geometry. Once you find the nucelt number you can calculate h.

[@aminadz7890]

Thank you so much i'm just wondering Why you use D in = 30 mm and not D out = 50 mm ??

[@abdurahmanxx]

because it is the surface of interaction

[@monzeral-hafez9185]

thank you very much to this very nice and easy explanation

[@timukudzendlovu2376]

From the calculations, L isn't it supposed to be 84.8mm?

[@rrentertainmentworld3829]

84 meter length that is very big length How make this is in our project

[@souravkumar2522]

Why u take heat transfer coefficient of only oil not water ???

[@LearnChemE]

We used to both to create an overall heat coefficient. If you're still confused, you can watch this screencast which goes through the beginning steps in more detail. kzbin.info/www/bejne/m6vIg36nnql6oqM

[@rishikeshnemade5551]

Why not take out side diameter

[@LearnChemE]

Great question. The reason the inside diameter is used is that the heat transfer is occurring where the oil contacts the water. That is at the point of the inside diameter.

[@zekariastsehayu6684]

a screencast...seriously! i like her accent but the I ndians work more complex examples

[@entertainment90983]

lmtd ka formula glt hai

[@กิตติพลขาวงาม]

Mr.kittipon khaongam นายกิตติพล ขาวงาม

[@MohitKumar-mq4bz]

What a waste of time