NUMERICAL ANALYSYS OF CO2 TRANS-CRITICAL CYCLES USING SEMI-HERMETIC RECIPROCATING COMPRESSORS FOR SMALL COOLING APPLICATIONS STUDY OF THE INTERNAL HEAT EXCHANGER INFLUENCE UNDER REAL WORKING CONDITIONS
The aim of this paper is to show the possibilities that CO2 offers for commercial refrigeration, considering a single stage trans-critical cycle, using semi-hermetic reciprocating compressors, under small cooling capacity systems. The present work is a numerical study of whole refrigerating equipments in general, and reciprocating compressors in particular, using CO2 as fluid refrigerant under real trans-critical cycle application, specially focused on high-medium back pressure (HMBP) working conditions.Based on both numerical simulation model for hermetic reciprocating compressors, and a detailed numerical simulation of single stage vapor compression unit behavior developed by the authors, an extensive numerical analysis is presented in order to understand the thermal and fluid dynamic behavior of these systems, and the influence of using internal heat exchangers (IHE) in order to improve the cycle performance.In that sense, the results obtained not only for the semi-hermetic reciprocating compressor numerically modeled, but also for the trans-critical refrigeration cycle simulated under real application conditions for HMBP capacity systems show the possibilities of these equipments using carbon dioxide as fluid refrigerant.
J.RIGOLA N.ABLANQUE C.D.P(E)REZ-SEGARRA O.LEHMKUHL A.OLIVA
Centre Tecnològic de Transferència de Calor (CTTC), Universitat Politècnica de Catalunya (UPC),C/ Colom, 11, Terrassa, E-08222, Spain
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）