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Experimental and theoretical study on work conversion and heat transfer of R290 linear compressor.

Author(s) : ZOU H., WANG Y., TANG M., LI X., TANG X., TIAN C.

Type of article: IJR article

Summary

To analyze the work conversion and heat transfer performance of the linear compressor, this study established a steady-state thermodynamic analysis model of a low-back-pressure linear compressor based on a variable capacity performance test. The influence of the heat transfer of the compressor components inside the shell on the cooling performance was analyzed. By improving the insulation of the inner discharge pipe, the cooling COP increases from 3.81 to 4.24. Through the experimental analysis of the linear compressor with cooling capacity adjustment, the quantitative results of the work conversion and heat transfer are obtained. The most proportion of the reheating capacity is transferred to the suction gas. Meanwhile, the heat transferred from the discharge pipe accounts for the most proportion of the total reheating capacity, which is about 62.8% – 86.2%. The larger the cooling capacity is, the smaller the proportion is. It presents a polynomial relationship of the fourth power by curve fitting between the direct suction ratio and the cooling capacity ratio. The thermodynamic parameters of the suction mixing region show that the direct suction ratio just ranges from 42% to 65%, resulting in about 14.0 °C ∼21.9 °C temperature increase from the suction heat transfer. To improve the compressor efficiency, it is effective to reduce the mix region by optimizing the suction passage inside of the compressor shell as well as reduce the heat transfer from the discharge pipe.

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Pages: 286-296

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Details

  • Original title: Experimental and theoretical study on work conversion and heat transfer of R290 linear compressor.
  • Record ID : 30031728
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 150
  • Publication date: 2023/06
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.01.005

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