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Experimental investigation and industrial application of a cascade air-source high temperature heat pump

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  • Wu, Di
  • Jiang, Jiatong
  • Hu, Bin
  • Wang, R.Z.
  • Sun, Yan

Abstract

For industrial thermal scenarios where there is no waste heat to recycle, the Air-source High Temperature Heat Pump (ASHTHP) is the only choice to replace the traditional industrial boiler and decrease energy consumption. A cascade ASHTHP has been designed and developed to support 125 °C hot water, which utilizes R410A and R245fa as working mediums. It is not only theoretically simulated and experimentally investigated, but also applied in an electroplating factory in Ningbo, China to provide 120 °C hot water. When the ambient temperature is 20 °C and the output temperature is 125 °C, the experimental heating capacity of the unit is 121.5 kW with a COP of 1.71. During the experimental investigation, the heating capacity attenuation remains within 19.25 %. Through the comparison and verification of the experimental data, the system simulation results have high accuracy with the error controlled within 5 %. When used in the electroplating factory to provide hot water at 120 °C, the cascade ASHTHP units can provide a heating capacity of 480 kW with a COP of 1.8 at the ambient temperature of around 25 °C, which results in annual savings of approximately $123,200 and a payback period of 1.65 years.

Suggested Citation

  • Wu, Di & Jiang, Jiatong & Hu, Bin & Wang, R.Z. & Sun, Yan, 2024. "Experimental investigation and industrial application of a cascade air-source high temperature heat pump," Renewable Energy, Elsevier, vol. 232(C).
    • Handle: RePEc:eee:renene:v:232:y:2024:i:c:s0960148124011625
    DOI: 10.1016/j.renene.2024.121094
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    References listed on IDEAS

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    2. Wu, Di & Wei, Junzhuo & Hu, Bin, 2025. "Theoretical analysis, experimental research and industrial verification of high temperature heat pump based on R1233zd(E)," Energy, Elsevier, vol. 319(C).

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