Thermodynamic Analysis of Air-Cycle Refrigeration Systems with Expansion Work Recovery for Compartment Air Conditioning
Applied Sciences
; 12(10):5287, 2022.
Article
in English
| ProQuest Central | ID: covidwho-1871975
ABSTRACT
As a requirement for sustainable development, air-cycle refrigeration has received wide attention as a candidate for environmentally friendly air conditioning technology. In this study, the thermodynamic performance of air refrigeration cycles is investigated in compartment air conditioning. The effects of compressor efficiency, expander efficiency, ambient humidity, all-fresh-air supply and ambient pressure on the cycle performance are presented. The effects of compressor arrangement in the high-pressure cycle and the low-pressure cycle are compared. An open-loop high-pressure cycle has a larger COP than that of an open-loop low-pressure cycle but requires larger heat exchange. The performance of air refrigeration cycles with full fresh air is studied, and the influence of fresh air is discussed. Schemes for condensed water recirculation with wet compression are proposed, which can improve the COPs of open-loop low-pressure cycles by 44.7%, 48.8% and 48.4%. In the air conditioning of plateau trains, open-loop high-pressure cycles have slightly lower COPs, but they can supply air with elevated pressure and oxygen concentration.
Sciences: Comprehensive Works; air cycle; reverse Brayton refrigerator; fresh air conditioner; COP; Refrigeration; Thermodynamics; Indoor air quality; Air conditioning; Humidity; Low pressure; Heat transfer; Heat exchangers; Severe acute respiratory syndrome coronavirus 2; Pressure; Heat exchange; Sustainable development; Air supplies; Compressor efficiency; Compression; High pressure; Efficiency
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Collection:
Databases of international organizations
Database:
ProQuest Central
Language:
English
Journal:
Applied Sciences
Year:
2022
Document Type:
Article
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