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Optimization analysis of linear compressor using R290 for capacity-modulation performance improvement.

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

Type of article: IJR article


The capacity-modulation performance of a linear compressor is greatly affected by the relationship between input parameters and control parameters owing to the free-piston structure. This study investigates the capacity-modulation characteristic theoretically and proposes an optimization method of the linear compressor for better performance. Suitable configurations for capacity-modulation are obtained based on the judging criteria of adjusting-range of required voltages and the relationship between supply voltages and output powers. The results show that piston diameter has a significant impact on capacity-modulation performance. The parameter combinations of initial clearance and spring stiffness under different piston diameters are divided into different zones, and zones for suitable configurations show similar shapes. A prototype using R290 is developed according to the optimization results and tested under the rated condition. The experimental results show great agreement with the analytical results, and the prototype shows excellent cooling and capacity-modulation performance with the cooling capacity ranging from 583.8 W to 1628.6 W, which demonstrates the accuracy and reliability of the optimization method. The maximum coefficient of performance is up to 4.25 under the condition of the evaporation temperature, condensation temperature, super-heating degree, and sub-cooling degree of 2.7 °C, 42.3 °C, 10.0 °C, and 4.0 °C, respectively.

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Pages: 9


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  • Original title: Optimization analysis of linear compressor using R290 for capacity-modulation performance improvement.
  • Record ID : 30028325
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 127
  • Publication date: 2021/07
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.01.010


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