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Numerical simulation and experimental validation of indirect expansion solar-assisted multi-functional heat pump

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  • Cai, Jingyong
  • Ji, Jie
  • Wang, Yunyun
  • Huang, Wenzhu

Abstract

A novel indirect expansion solar-assisted multi-functional heat pump (IX-SAMHP) system which composes of the multi-functional heat pump system and solar thermal collecting system is proposed and studied in this paper. This system can fulfill space heating, space cooling and water heating with high energy efficiency by utilizing solar energy. For solar water heating mode and solar space heating mode, a dynamic model is presented and validated with the experimental results. The simulation results show good consistency with the experimental data, and the established model is able to predict the system performance at a reasonable accuracy (with the root mean square deviations less than 5%). On this basis, the performances of the IX-SAMHP system are investigated under different parametric conditions. For solar water heating mode, simultaneously operating the solar thermal collecting system and multi-functional heat pump system can be an energy efficiency method. With the solar irradiation rising from 0W/m2 to 800W/m2, the COP increases from 2.35 to 2.57. In solar space heating mode, the effect of the mass flow rate of water in evaporator is investigated. To balance the heating capacity and COP, the mass flow rate of water should be adjusted according to different temperature demands and heat load.

Suggested Citation

  • Cai, Jingyong & Ji, Jie & Wang, Yunyun & Huang, Wenzhu, 2016. "Numerical simulation and experimental validation of indirect expansion solar-assisted multi-functional heat pump," Renewable Energy, Elsevier, vol. 93(C), pages 280-290.
    • Handle: RePEc:eee:renene:v:93:y:2016:i:c:p:280-290
    DOI: 10.1016/j.renene.2016.02.082
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    References listed on IDEAS

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