Exploring Exergy Concepts A system undergoes a refrigeration cycle w...
Exploring Exergy Concepts
A system undergoes a refrigeration cycle while receiving QC by heat transfer at temperature TC and discharging energy QH by heat transfer at a higher temperature TH. There are no other heat transfers. (a) Using energy and exergy balances, show that the net work input to the cycle cannot be zero. (b) Show that the coefficient of performance of the cycle can be expressed as
where Ed is the exergy destruction and T0 is the temperature of the exergy reference environment.
(c) Using the result of part (b), obtain an expression for the maximum theoretical value for the coefficient of performance.
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