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Experimental study of an efficient low-temperature thermoacoustic Stirling heat pump.

Author(s) : TENG G., DAI L., WANG R., HU J., WU Z., ZHANG L., LUO E.

Type of article: IJR article

Summary

Heat pump technology has the potential to significantly reduce the energy consumption and environmental pollution caused by coal-fired and gas-fired heating systems. However, conventional heat pump systems often struggle to operate in low-temperature environments, posing a challenge in meeting the heating demands of cold regions. In light of the wide range of available temperatures offered by thermoacoustic Stirling heat pump technology, this study designed and tested an electrically-driven free-piston Stirling heat pump for building heating. In experimental trials, the prototype demonstrated promising performance. When circulating water is heated from 41 °C to 46 °C, the overall coefficient of performance reaches 1.78 at an ambient temperature of -28 °C. Notably, the relative Carnot efficiency increases as the ambient temperature decreases or the heating temperature rises, standing in stark contrast to the behavior of the vapor compression heat pump cycle. Even at an ambient temperature as low as -40 °C, the heat pump operates reliably, achieving a coefficient of performance of 1.57. These experimental performances show a promising prospect for building heating in severe cold regions.

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Pages: 17-26

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Details

  • Original title: Experimental study of an efficient low-temperature thermoacoustic Stirling heat pump.
  • Record ID : 30033644
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 172
  • Publication date: 2025/04
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2025.01.005

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