14- Cold water (cp _ 4.18 kJ/kg · °C) leading to a shower enters a well- insulated, thin-walled, double-pipe, counter-flow heat exchanger at 15°C at a rate of 0.25 kg/s and is heated to 45°C by hot water (cp _ 4.19 kJ/kg · °C) that enters at 100°C at a rate of 3 kg/s. Determine (a) the rate of heat transfer and (b) the rate of entropy generation in the heat exchanger.

14- Cold water (cp _ 4.18 kJ/kg · °C) leading to a shower enters a well- insulated, thin-walled, double-pipe, counter-flow heat exchanger at 15°C at a rate of 0.25 kg/s and is heated to 45°C by hot water (cp _ 4.19 kJ/kg · °C) that enters at 100°C at a rate of 3 kg/s. Determine (a) the rate of heat transfer and (b) the rate of entropy generation in the heat exchanger.

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

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

14- Cold water (cp _ 4.18 kJ/kg · °C) leading to a shower enters a well-
insulated, thin-walled, double-pipe, counter-flow heat exchanger at 15°C
at a rate of 0.25 kg/s
and is heated to 45°C by hot water (cp _ 4.19 kJ/kg · °C) that enters at
100°C at a rate of 3 kg/s. Determine (a) the rate of heat transfer and (b)
the rate of entropy generation in the heat exchanger.

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