Fundamental optimal relation of a generalized irreversible Carnot heat pump with complex heat transfer law |
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Authors: | Jun Li Lingen Chen and Fengrui Sun |
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Institution: | 1.Postgraduate School,Naval University of Engineering,Wuhan,People’s Republic of China |
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Abstract: | The fundamental optimal relation between heating load and coefficient of performance (COP) of a generalized irreversible Carnot
heat pump is derived based on a new generalized heat transfer law, which includes the generalized convective heat transfer
law and generalized radiative heat transfer law, q ∝ (ΔT
n
)
m
. The generalized irreversible Carnot heat pump model incorporates several internal and external irreversibilities, such as
heat resistance, bypass heat leakage, friction, turbulence and other undesirable irreversibility factors. The added irreversibilities
besides heat resistance are characterized by a constant parameter and a constant coefficient. The effects of heat transfer
laws and various loss terms are analysed. The heating load vs. COP characteristic of a generalized irreversible Carnot heat
pump is a parabolic-like curve, which is consistent with the experimental result of thermoelectric heat pump. The obtained
results include those obtained in many literatures and indicated that the analysis results of the generalized irreversible
Carnot heat pump were more suitable for engineering practice than those of the endoreversible Carnot heat pump. |
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Keywords: | |
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