Analysis the impact of rolling piston compressor reservoirs on performance
Based on the function of the accumulator in the system,this paper studies the performance change trend of the traditional high-back pressure rotary compressor(Abbreviations:models with reservoirs)after canceling the accumulator(Abbreviations:models without reservoirs).It also analyzes the reasons for the changes based on system parameters,and provides a feasibility analysis for the subsequent system architecture without an accumulator.Firstly,through single-unit simulation,it was found that under the single-unit GX working condition(8℃ suction superheat),the COP of the system with and without accumulator was basically the same.The result of the single-unit test showed that the COP difference between the two was less than 0.4％,which was basically consistent with the simulation data.However,through air conditioning system testing and reproduction on a single-unit suction dryness test bench,it was found that directly replacing the compressor without changing the system configuration,the non-accumulator model has an increased liquid-carrying capacity during suction and a energy efficiency decline of about 5.2％.By adjusting the throttling components and refrigerant charge,the non-accumulator model's overall performance can be maintained without decline(energy efficiency difference<0.5％),and the liquid-carrying capacity of the two is basically the same.Finally,after adjusting the system configuration,the maximum exhaust temperature was determined,and it was found that the temperature did not exceed 115℃,which meets the specifications of the compressor manual.
CompressorEliminate reservoirsPerformance degradationSystem configurationliquid-carrying capacity during suction
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