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다양한 냉매를 적용한 내부열교환기 부착 2단 압축 냉동시스템의 성능 분석Performance Analysis of Two-stage Compression Refrigeration System with Internal Heat Exchanger Applied Various Refrigerants

Other Titles
Performance Analysis of Two-stage Compression Refrigeration System with Internal Heat Exchanger Applied Various Refrigerants
Authors
윤정인허성관제재면전민주손창효문정현
Issue Date
2015
Publisher
한국동력기계공학회
Keywords
Two-stage compression and one-stage expansion refrigeration system; Alternative refrigerant; Internal heat exchanger; COP; Mass flow-rate
Citation
동력시스템공학회지, v.19, no.6, pp 82 - 88
Pages
7
Journal Title
동력시스템공학회지
Volume
19
Number
6
Start Page
82
End Page
88
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/7879
DOI
10.9726/kspse.2015.19.6.082
ISSN
2713-8429
2713-8437
Abstract
In this paper, cycle performance analysis of two-stage compression and one-stage expansion refrigeration system applied various refrigerants is presented to offer the basic design data for the operating parameters of the system. The operating parameters considered in this study include degree of superheating and subcooling, compressor efficiency, evaporation temperature, condensing temperature, mass flow rate ration into inter-cooler, effectiveness of internal heat exchanger. The main results were summarized as follows : The COP of two-stage compression and 1-stage expansion refrigeration system increases with the increasing subcooling, mass flow rate ration of inter-cooler, evaporation temperature, but decreases with the increasing condensing temperature and superheating degree. Therefore, subcooling degree, mass flow rate ratio of inter-cooler of two-stage compression and 1-stage expansion using substitute refrigerant have an effect on COP of this system. The COP of alternative refrigerants was higher than the COP of R22 in this study, although the COP of some mixed refrigerants were lower than COP of R22.
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