Q) A refrigerant at |-40^ C flows into a copper pipe (400 W/mK) of 10 mm ID and 14 mm OD. A 40 mm thick shell of thermocole (0.03 W/mK) is put on the pipe to reduce losses. Estimate the heat leakage to the refrigerant per meter length of pipe, if the ambient temperature is 40°C. Assume the external and internal heat transfer coefficients are 5 W/m?K and OW / (m ^ 2) *

Q) A refrigerant at |-40^ C flows into a copper pipe (400 W/mK) of 10 mm ID and 14 mm OD. A 40 mm thick shell of thermocole (0.03 W/mK) is put on the pipe to reduce losses. Estimate the heat leakage to the refrigerant per meter length of pipe, if the ambient temperature is 40°C. Assume the external and internal heat transfer coefficients are 5 W/m?K and OW / (m ^ 2) *

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

Q) A refrigerant at |-40^ C flows into a
copper pipe (400 W/mK) of 10 mm ID and 14
mm OD. A 40 mm thick shell of thermocole
(0.03 W/mK) is put on the pipe to reduce
losses. Estimate the heat leakage to the
refrigerant per meter length of pipe, if the
ambient temperature is 40°C. Assume the
external and internal heat transfer
coefficients are 5 W/m?K and OW / (m ^ 2) *
K respectively. Calculate the amount of
refrigerant evaporated per hour taking its
latent heat at - 40 degrees *C as 1390
kJ/kg.

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