期刊
INTERNATIONAL JOURNAL OF REFRIGERATION
卷 93, 期 -, 页码 52-64出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2018.05.039
关键词
Two-stage compression; Vapor-injection; Flash tank; Economizer; Optimization; Intermediate pressure
资金
- CONVOCATORIA ABIERTA 2013-SEGUNDA FASE program - SENESCYT (Secretaria de Educacion Superior, Ciencia, Tecnologia e Innovacion) of Ecuador [2015-AR37665]
This paper presents a comprehensive study of two-stage vapor compression cycles with vapor-injection for several refrigerants considering that the heat sink has a limited capacity. The key parameters of the cycle performance are identified and the influence of these parameters on the heating COP is analyzed. The optimum intermediate conditions of the cycle are evaluated using a general model of the cycle, considering two configurations (flash tank and economizer). Based on the optimization results, a correlation is proposed in order to estimate the optimum intermediate pressure, taking into account the temperature lift in the secondary fluid imposed by the application. The correlation uses cycle subcooling as an input, which is a novelty from the current correlations proposed in the literature. In addition, an optimum subcooling control strategy is proposed and finally, the influence of the size of the system components on the COP is studied. (C) 2018 Elsevier Ltd and IIR. All rights reserved.
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