A system undergoes a refrigeration cycle while receiving Qc by heat transfer at temperature Tc anddischarging energy Qu 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:TcTH – TeA'¯ T(Qn – Q).B =where E, is the exergy destruction and To 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 ofperformance.

Considering refrigeration cycle as a system which receive heat (QC) by heat transfer at temperature…

tem undergoes a refrigeration cycle while receiving Qc by heat tr harging energy QH by heat transfer at a higher temperature TH. There are Jsing energy and exergy balances, show that the net work input to the cy Show that the coefficient of performance of the cycle can be expressed a Te B = \TH – Tc) T(Qn – Qc),

tem undergoes a refrigeration cycle while receiving Qc by heat tr harging energy QH by heat transfer at a higher temperature TH. There are Jsing energy and exergy balances, show that the net work input to the cy Show that the coefficient of performance of the cycle can be expressed a Te B = \TH – Tc) T(Qn – Qc),

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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A system undergoes a power cycle while receiving 1450 kJ by heat transfer from a thermal reservoir at a the temperature of 780 K and discharging 560 kJ by heat transfer to a thermal reservoir at (a) 250 K, (b) 380 K, (c) 460 K. For each case, determine whether the cycle operates irreversibly, operates reversibly, or is impossible.
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Define the Mechanisms of exergy transfer.
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