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Experimental evaluation of the effect of mechanical subcooling on a hydrocarbon heat pump system

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  • Shiravi, Amir hossein
  • Ghanbarpour, Morteza
  • Palm, Bjorn

Abstract

In addition to the progressive movement of countries towards the use of renewable energy sources, efficient energy consumption is another important goal set by the International Energy Agency. In heat pump technology, the use of mechanical subcooling system has a high potential for this purpose. In this experimental study, the impact of using a mechanical subcooling cycle on the performance of a heat pump system is investigated. The system is designed to supply heat at condensing temperatures of 50, 60 and 70 °C. Propane and isobutane are used as low GWP refrigerants in the main and secondary cycles, respectively. The results revealed that both the COP and heating capacity of the system are increased by adding the mechanical subcooling cycle up to 15.1% and 34%, respectively. To express the improvement of the system performance by means of the TEWI index, a reduction of 9–13% is calculated when the mechanical subcooling cycle is included. It is also of interest that the cooling coefficient of performance (COP2) is improved by adjoining a secondary cycle as a liquid subcooler. An optimal power ratio between the basic cycle and the secondary cycle was obtained, which is consistent with the simulation results.

Suggested Citation

  • Shiravi, Amir hossein & Ghanbarpour, Morteza & Palm, Bjorn, 2023. "Experimental evaluation of the effect of mechanical subcooling on a hydrocarbon heat pump system," Energy, Elsevier, vol. 274(C).
    • Handle: RePEc:eee:energy:v:274:y:2023:i:c:s0360544223008009
    DOI: 10.1016/j.energy.2023.127406
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    References listed on IDEAS

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    1. Yu, Binbin & Yang, Jingye & Wang, Dandong & Shi, Junye & Chen, Jiangping, 2019. "An updated review of recent advances on modified technologies in transcritical CO2 refrigeration cycle," Energy, Elsevier, vol. 189(C).
    2. Mota-Babiloni, Adrián & Mateu-Royo, Carlos & Navarro-Esbrí, Joaquín & Molés, Francisco & Amat-Albuixech, Marta & Barragán-Cervera, Ángel, 2018. "Optimisation of high-temperature heat pump cascades with internal heat exchangers using refrigerants with low global warming potential," Energy, Elsevier, vol. 165(PB), pages 1248-1258.
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