Irreversible refrigerators under per-unit-time coefficient of performance optimization

Journal Article · Fri Aug 01 04:00:00 UTC 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120437· OSTI ID:538380

Velasco, S; Roco, J M; Medina, A; Calvo Hernandez, A ^[1]

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1. Departamento de Fisica Aplicada, Facultad de Ciencias, Universidad de Salamanca, 37008 Salamanca (Spain)

A finite-time thermodynamics analysis is used to investigate the optimal coefficient of performance (COP) of an irreversible Carnot refrigerator using the per-unit-time COP as an objective function for optimization. The model includes finite-rate heat transfers between the refrigerant and the external heat reservoirs, heat leak between heat reservoirs, and internal dissipations of the refrigerant. Heat conductances associated with heat transfers are optimized by maximizing the cooling power per unit of capital invested in the refrigerator. The obtained results are consistent with performance data for real low-temperature refrigerators. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 538380
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 8 Vol. 71; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CARNOT CYCLE
CRYOGENICS
DISSIPATION FACTOR
HEAT TRANSFER
IRREVERSIBLE PROCESSES
LEAKS
OPTIMIZATION
REFRIGERATION
REFRIGERATORS
THERMODYNAMICS