Operation Performance and Modeling for R32 Variable Frequency Rotary Compressor under Varied Operating Conditions

Yu Zhongyang; Tao Leren; He Jun; Yuan Zhaoyang

doi:10.3969/j.issn.0253-4339.2018.03.058

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Operation Performance and Modeling for R32 Variable Frequency Rotary Compressor under Varied Operating Conditions

更新时间：2024-07-18

- Operation Performance and Modeling for R32 Variable Frequency Rotary Compressor under Varied Operating Conditions
- Journal of Refrigeration Vol. 39, Issue 3, (2018)
- 作者机构：
  
  上海理工大学制冷与低温工程研究所
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2018.03.058
  CLC：
- Published：2018
- 稿件说明：
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Yu Zhongyang, Tao Leren, He Jun, et al. Operation Performance and Modeling for R32 Variable Frequency Rotary Compressor under Varied Operating Conditions[J]. Journal of refrigeration, 2018, 39(3).
DOI：

Yu Zhongyang, Tao Leren, He Jun, et al. Operation Performance and Modeling for R32 Variable Frequency Rotary Compressor under Varied Operating Conditions[J]. Journal of refrigeration, 2018, 39(3). DOI： 10.3969/j.issn.0253-4339.2018.03.058.

摘要

本文研究了R32变频滚动转子式制冷系统，实验分析了压缩机运行频率、吸排气压比、蒸发温度对不同吸气状态下压缩机电效率变化规律的影响，并以此建立了适用于吸气过热和吸气带液的压缩机电效率模型。结果表明：1)在相同压比、相同蒸发温度下，压缩机电效率均随电子膨胀阀开度的变大呈线性下降趋势，且吸气带液段斜率大于吸气过热段，即压缩机吸气带液时，压缩机电效率下降程度更大；2)相同压比下，蒸发温度越高，电效率越小；相同蒸发温度下，压缩机压比越高，电效率越小。同时，压缩机压比越高，蒸发温度对压缩机电效率的影响越大；3)验证工况下模型计算值与实际值最大相对误差为1.83%，最小相对误差为0.03%，具有较好的可靠性；4)压缩机在低频率下运行时性能会恶化，此时模型的准确性会降低，因此模型适用于压缩机频率高于额定频率、吸气干度大于0.88的工况。

Abstract

To model the electrical efficiency of a compressor that can apply a suction refrigerant state under both superheated and two-phase conditions

the performance of an R32 variable frequency rotary compressor

which varies with the compressor frequency

pressure ratio

and evaporating temperature

is analyzed in this paper. The results show that when the system is at a fixed pressure ratio and evaporating temperature

the electrical efficiency linearly decreases with the declining superheated temperature and an increase in suction vapor quality. Moreover

the slope under two-phase suction is above that under superheated suction. In addition

the electrical efficiency of the system at a fixed pressure ratio is inversely proportional to the evaporating temperature

and that of the system at a fixed evaporating temperature is also inversely proportional to the pressure ratio. The more the pressure ratio varies

the smaller the influence of the evaporating temperature. To demonstrate the precision of the model

the theoretical value is compared with the experiment results in this paper. The maximum of relative error is 1.83%

and the minimum is 0.03%. The performance of a compressor at low frequency will deteriorate

which leads to the inaccuracy of the model

and therefore the model is suitable for operating conditions with a frequency higher than the rated frequency and a suction vapor quality higher than 0.88.

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