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A Novel Oil-free Dual Piston Compressor Driven by a Moving Coil Linear Motor with Capacity Regulation Using R134a

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  • Jian Sun

    (Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100190, China)

  • Jianguo Li

    (University of Chinese Academy of Sciences, Beijing 100190, China)

  • Yuanli Liu

    (Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100190, China)

  • Zhijie Huang

    (Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100190, China)

  • Jinghui Cai

    (Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100190, China)

Abstract

Improving compressor efficiency is very important to save energy and reduce greenhouse gas emissions. A novel oil-free dual piston compressor prototype driven by a moving coil linear motor was developed, and its working principle was described in detail. The prototype was integrated with a test rig to measure the operation characteristics, the compressor efficiencies and the coefficient of performance (COP). The results show that the dual piston structure results in extraordinary sinusoidal gas force and electromagnetic force and significantly reduces piston offset, which is completely different from the traditional single piston structure. Compared with the variable frequency method, the variable stroke method has lower energy consumption and a higher COP, which is more suitable to cooling capacity regulation for the prototype. The maximum COP, motor efficiency and volumetric efficiency are 5.34, 87.9% and 79.1%, respectively, under the design condition (the evaporation pressure is 0.35 MPa, and the pressure ratio is 2.54). The COP of the linear compressor is 38%, 24% and 12% higher than the commercial crank-driven reciprocating compressor at the pressure ratios of 2.54, 2.80 and 3.90, respectively, which reflects the efficiency advantage of the dual piston linear compressor in household refrigeration.

Suggested Citation

  • Jian Sun & Jianguo Li & Yuanli Liu & Zhijie Huang & Jinghui Cai, 2021. "A Novel Oil-free Dual Piston Compressor Driven by a Moving Coil Linear Motor with Capacity Regulation Using R134a," Sustainability, MDPI, vol. 13(9), pages 1-21, April.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:9:p:5029-:d:546749
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    References listed on IDEAS

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    Cited by:

    1. Li, Chengzhan & Sun, Jian & Zou, Huiming & Cai, Jinghui & Zhu, Tingting, 2023. "Characteristic analysis and energy efficiency of an oil-free dual-piston linear compressor for household refrigeration with various conditions," Energy, Elsevier, vol. 270(C).

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