Performance Test of Fresh-air Household Air-refrigeration System
Air refrigeration has been extensively applied to the fields of aircraft environmental control and food refrigeration. However, these scenarios are equipped with high-pressure air sources or separate air compressors, which limits the flexible application of air refrigeration technology, and the over...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2021-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2021.06.015 |
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| Summary: | Air refrigeration has been extensively applied to the fields of aircraft environmental control and food refrigeration. However, these scenarios are equipped with high-pressure air sources or separate air compressors, which limits the flexible application of air refrigeration technology, and the overall coefficient of performance (COP) is low. A high-speed centrifugal compression-and-expansion integrated machine driven by a high-speed motor can considerably simplify the system and improve the COP by recovering the expansion work. This study uses a high-speed motor-driven oil-free floating bearing compression-expansion integrated machine as the core component to build a fresh-air household air-refrigeration system with an open reverse booster cycle. The temperature, pressure, and flow of the expander and compressor inlet and outlet of the system is measured, and the system is connected with an enthalpy difference chamber to obtain the refrigeration capacity and air supply parameters of the refrigeration system. Performance tests are conducted at multiple speeds under standard air-conditioning conditions. At a rated speed of 38 000 r/min, the cooling capacity is 1.6 kW. The supply-air temperature decreases and the cooling capacity increases with an increase in speed. Based on this feature, the air refrigeration system has the advantages of a direct air supply and adjustable supply-air temperature, which enables air-cooling technology in the field of fresh-air conditioning applications. |
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| ISSN: | 0253-4339 |