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<p>The volumetric efficiency of a direct expansion solar-ambient hybrid source compression heat pump (DXS-AHS-CHP) was affected due to rise in solar thermal flux, ambient temperature and relative humidity. Moreover, the DXS-AHS-CHP systems are using grid power generated by coal based thermal power plants. To overcome these issues, the main objectives formulated in this paper are: (a) to explore the possibility of using a sub cooler vapour injection (SC-VI) in a DXS-AHS-CHP for enhancing the compressor volumetric efficiency by control the refrigerant super heat and (b) to reduce the environmental impacts of a DXS-AHS-CHP with SC-VI by integrating the on-grid photovoltaic panels. The experimental observations have been made in a photovoltaic powered DXS-AHS-CHP with SC-VI and compared with the grid powered DXS-AHS-CHP without SC-VI for the period of fifty days in each mode. The average system performance was compared in terms of compressor volumetric efficiency, compressor power consumption, condenser heating capacity and coefficient of performance (COP). The results showed that the photovoltaic powered DXS-AHS-CHP with SC-VI has maintained the compressor volumetric efficiency of more than 0.84 with 1.8—3.3% reduced compressor power consumption, 2.5—7.5% improved condenser heating capacity and 4.2—10.3% improved COP when compared to the grid powered DXS-AHS-CHP without SC-VI. The proposed photovoltaic-powered DXS-AHS-CHP with SC-VI has a payback of 34.19&#xa0;months with 96.12% lower carbon emissions compared to the grid-connected conventional DXS-AHS-CHP without SC-VI.</p>

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Performance enhancement of photovoltaic powered direct expansion solar-ambient hybrid source compression heat pumps working with a sub cooler vapour injection

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Senthil Kumar Kaliyappan,
  • Mohanraj Murugesan,
  • Sivalakshmi Sivanathan,
  • Yerzhan Belyayev

摘要

The volumetric efficiency of a direct expansion solar-ambient hybrid source compression heat pump (DXS-AHS-CHP) was affected due to rise in solar thermal flux, ambient temperature and relative humidity. Moreover, the DXS-AHS-CHP systems are using grid power generated by coal based thermal power plants. To overcome these issues, the main objectives formulated in this paper are: (a) to explore the possibility of using a sub cooler vapour injection (SC-VI) in a DXS-AHS-CHP for enhancing the compressor volumetric efficiency by control the refrigerant super heat and (b) to reduce the environmental impacts of a DXS-AHS-CHP with SC-VI by integrating the on-grid photovoltaic panels. The experimental observations have been made in a photovoltaic powered DXS-AHS-CHP with SC-VI and compared with the grid powered DXS-AHS-CHP without SC-VI for the period of fifty days in each mode. The average system performance was compared in terms of compressor volumetric efficiency, compressor power consumption, condenser heating capacity and coefficient of performance (COP). The results showed that the photovoltaic powered DXS-AHS-CHP with SC-VI has maintained the compressor volumetric efficiency of more than 0.84 with 1.8—3.3% reduced compressor power consumption, 2.5—7.5% improved condenser heating capacity and 4.2—10.3% improved COP when compared to the grid powered DXS-AHS-CHP without SC-VI. The proposed photovoltaic-powered DXS-AHS-CHP with SC-VI has a payback of 34.19 months with 96.12% lower carbon emissions compared to the grid-connected conventional DXS-AHS-CHP without SC-VI.