5) During an experiment, a plate heat exchanger that is used to transfer heat from a hot-water stream to a cold-water stream is tested, and the following measurements are taken: Hot water Cold water stream stream Inlet temperature, "C Outlet temperature, C Volume flow rate, L/min 38.9 14.3 27.0 19.8 2.5 4.5 The heat transfer arca is calculated to be 0.0400 m. (a) Calculate the rate of heat transfer to the cold water. (b) Calculate the overall heat transfer coefficient. (c) Determine if the heat exchanger is truly adiabatic. If not, determine the fraction of heat loss and calculate the heat transfer efficiency. (d) Determine the effectiveness and the NTU values of the heat exchanger. (Answers: (a) 1724 W (b) 3017 Wiw C (c) the heat exchanger is not adiabatic so heat loss 16.4% and heat transfer efficiency 83.6% (d) effectiveness 44.4% and NTU 0.697)

5) During an experiment, a plate heat exchanger that is used to transfer heat from a hot-water stream to a cold-water stream is tested, and the following measurements are taken: Hot water Cold water stream stream Inlet temperature, "C Outlet temperature, C Volume flow rate, L/min 38.9 14.3 27.0 19.8 2.5 4.5 The heat transfer arca is calculated to be 0.0400 m. (a) Calculate the rate of heat transfer to the cold water. (b) Calculate the overall heat transfer coefficient. (c) Determine if the heat exchanger is truly adiabatic. If not, determine the fraction of heat loss and calculate the heat transfer efficiency. (d) Determine the effectiveness and the NTU values of the heat exchanger. (Answers: (a) 1724 W (b) 3017 Wiw C (c) the heat exchanger is not adiabatic so heat loss 16.4% and heat transfer efficiency 83.6% (d) effectiveness 44.4% and NTU 0.697)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

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.

Question

5) During an experiment, a plate heat exchanger that is used to transfer heat from a hot-water
stream to a cold-water stream is tested, and the following measurements are taken:
Hot water
Cold water
stream
stream
38.9
Inlet temperature, °C
Outlet temperature, "C
Volume flow rate, L/min
14.3
27.0
19.8
2.5
4.5
The heat transfer arca is calculated to be 0.0400 m.
(a) Calculate the rate of heat transfer to the cold water.
(b) Calculate the overall heat transfer coefficient.
(c) Determine if the heat exchanger is truly adiabatic. If not,
determine the fraction of heat loss and calculate the heat
transfer efficiency.
(d) Determine the effectiveness and the NTU values of the
heat exchanger.
(Answers: (a) 1724 W (b) 3017 Wiw C (c) the heat exchanger is not adiabatic so heat loss
16.4% and heat transfer efficiency 83.6% (d) effectiveness 44.4% and NTU 0.697)
Hot
water
38.9°C
19.8°C
Cold
water
14.3°C
27.0°C

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