i) ii) State the assumptions used to arrive at the above equation. Explain why the "log-mean" temperature difference above is a more appropriate temperature different for heat exchangers than, say, the simple arithmetic mean of inlet and outlet temperature difference.
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
I need help on this question: (These questions require the use of Roger and Mayhew Steam Tables)
a) In a concentric-pipe heat exchanger, one of the fluids is a condensing vapour and the
other is the coolant. Sketch the variation in fluid temperatures of two fluids as they
flow through the heat exchanger. Indicate clearly the inlet and outlet of the coolant
and its direction of flow.
b) (is in the picture provided)
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