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Simulation and Optimization Study on an Energy Efficiency Improvement Strategy of an Air Source Heat Pump Under Australian Standards

Author

Listed:
  • Jiangtao Xu

    (School of Mechanical Engineering, Nanjing Institute of Technology, Jiangning District, Nanjing 211167, China)

  • Cheng Liu

    (School of Mechanical Engineering, Nanjing Institute of Technology, Jiangning District, Nanjing 211167, China)

  • Xiaojun Liu

    (Jiangsu Guangmang New Energy Co., Ltd., Taizhou 214500, China)

  • Xiaoxiao Sun

    (School of Mechanical Engineering, Nanjing Institute of Technology, Jiangning District, Nanjing 211167, China)

  • Yongjian Li

    (School of Mechanical Engineering, Nanjing Institute of Technology, Jiangning District, Nanjing 211167, China)

Abstract

As a clean energy technology, air source heat pump (ASHP) technology has garnered increasing attention nowadays; however, the sharp decline in energy efficiency under low-temperature conditions remains a significant challenge impeding their widespread adoption. In this paper, in response to the demand under the Australian standard, mathematical modeling was carried out to explore the technical strategy for improving the performance of an ASHP; then, these strategies were evaluated by simulation calculation and experiment. The results show that, using frequency conversion, the coefficient of performance of the heat pump system (COP) reaches a maximum value of 2.48 when the frequency is 50 Hz, and the COP of the heat pump can reach a maximum value of 2.51 when the opening of the expansion valve is about 40%. Then, a new type of mixed refrigerant (R134a:R600a:R290) was proposed; the COP of the system reaches 2.502 when the mixture ratio is 1:6:3, which is an improvement of 6.61% compared to the use of only R134a. Finally, an analysis of the annual energy consumption under Australian weather conditions was conducted; the average COP is about 3.894, which is 6.3% higher than the result of using R134a. These results provide a theoretical basis for the development of a heat pump system that meets Australian standards.

Suggested Citation

  • Jiangtao Xu & Cheng Liu & Xiaojun Liu & Xiaoxiao Sun & Yongjian Li, 2025. "Simulation and Optimization Study on an Energy Efficiency Improvement Strategy of an Air Source Heat Pump Under Australian Standards," Energies, MDPI, vol. 18(6), pages 1-19, March.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:6:p:1392-:d:1610261
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    References listed on IDEAS

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    1. Xiao, Biao & Chang, Huawei & He, Lin & Zhao, Shunan & Shu, Shuiming, 2020. "Annual performance analysis of an air source heat pump water heater using a new eco-friendly refrigerant mixture as an alternative to R134a," Renewable Energy, Elsevier, vol. 147(P1), pages 2013-2023.
    2. Yang, Liang & Yuan, Han & Peng, Jing-Wei & Zhang, Chun-Lu, 2016. "Performance modeling of air cycle heat pump water heater in cold climate," Renewable Energy, Elsevier, vol. 87(P3), pages 1067-1075.
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