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Performance representation of variable-speed compressor for inverter air conditioners based on experimental data.

Author(s) : SHAO S., SHI W., LI X., et al.

Type of article: Article, IJR article

Summary

Variable speed control of compressors is one of the best methods to regulate the capacity of heat pumps and air conditioners. An analysis was conducted for modelling the variable speed compressor for simulation of inverter air conditioners and heat pumps. Having scattered the real operation performance of inverter compressor into the infinite operation performance of a constant speed compressor, the map-based method was utilized to fit the performance curves of inverter compressor. The model is built at the basic frequency and under the map condition as the second-order function of condensation temperature and evaporation temperature. It was then corrected by the compressor frequency as the second-order function of frequency and by the actual operating conditions as the actual specific volume of the suction gas. This method was used to set up simulation models for three different compressors. Compared with the data provided by the compressor manufacturers, the average relative errors were less than 2, 3 and 4% for refrigerant mass flow rate, compressor power input and COP, respectively. This model of variable speed compressor was suitable for the simulation of inverter air conditioner and heat pump systems. Based on the experimental data and simulation model, the frequency at zero mass flow rate and power input at zero frequency are discussed and the relation between COP and compressor frequency is analysed.

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Pages: 805-815

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Details

  • Original title: Performance representation of variable-speed compressor for inverter air conditioners based on experimental data.
  • Record ID : 2005-0677
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 27 - n. 8
  • Publication date: 2004/12

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