Lecture 37 (2013). Examples of effectiveness-NTU method. Heat exchangers

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Lecture 37 (2013). Examples of effectiveness-NTU method. Heat exchangers. Material based on Chapter 11 in the textbook of Cengel and Ghajar (4th edition). Lecture presented by Prof Josua Meyer, Department of Mechanical and Aeronautical Engineering, University of Pretoria. E-mail: josua.meyer@up.ac.za

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22 июл 2024

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Комментарии : 10

@annavanwyk1858 10 лет назад

A lot more helpful than my lecturer. Thank you

@badhadhagodana2404 9 лет назад

Am say to thank very much Mr j your lecturer is better & easy to understand than our class lectur. Lecture like this is made up our mind & good performance for us and also overcame problem contact us . 10q & continue your lecturer work.

@robex2000w 10 лет назад

thank you sir~

@dra.g.salihu8515 10 лет назад

Many thanks Prof. How to apply NTU method when the heat capacity ratio is changing? for example when a bypass is attached to the Hot stream which is used in manipulation of the flowrate? in the case of this example, at bypass fraction=0.0, Cmin is the COLD stream and at bypass fraction = 0.7, Cmin is the HOT stream.

@mohammadshafique1806 8 лет назад

Sir, Why is the actual Heat transfer rate Q is equal to Qc?

@bakriegassing2548 9 лет назад

the overall heat transfer U, the unit is on Kelvin, and for the other parameter for example delta T the unit is on Celsius, would that be a problem at the end after the calculation is done? can anybody explain?

@mohammedthuwaini2688 9 лет назад

Bakrie Gassing for ex. (80-20) = 60 Celsius its the same as saying (353-293) = 60 Kelvin. But at the end of the day U must be written in Kelvin, SI unit.