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Performance study of a photovoltaic solar assisted heat pump with variable-frequency compressor – A case study in Tibet

Author

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  • Keliang, Liu
  • Jie, Ji
  • Tin-tai, Chow
  • Gang, Pei
  • Hanfeng, He
  • Aiguo, Jiang
  • Jichun, Yang

Abstract

The performance of a photovoltaic solar assisted heat pump (PV-SAHP) with variable-frequency compressor is reported in this paper. The system is a direct integration of photovoltaic/thermal solar collectors and heat pump. The solar collectors extract the required thermal energy from the heat pump and at the same time, the cooling effect of the refrigerant lowers the working temperature of the solar cells. So this combined system has a relatively high thermal performance with an improved photovoltaic efficiency. To adapt to the continuously changing solar radiation and ambient temperature conditions, the refrigerant mass flow rate should match the heat gain at the evaporator accordingly. A variable-frequency compressor and an electricity-operated expansion valve were used in the proposed system. Mathematical models were developed to evaluate the energy performance of the combined system based on the weather conditions of Tibet. The simulation results indicated that on a typical sunny winter day with light breeze, the average COP could reach 6.01, and the average electricity efficiency, thermal efficiency and overall efficiency were 0.135, 0.479 and 0.625 respectively.

Suggested Citation

  • Keliang, Liu & Jie, Ji & Tin-tai, Chow & Gang, Pei & Hanfeng, He & Aiguo, Jiang & Jichun, Yang, 2009. "Performance study of a photovoltaic solar assisted heat pump with variable-frequency compressor – A case study in Tibet," Renewable Energy, Elsevier, vol. 34(12), pages 2680-2687.
    • Handle: RePEc:eee:renene:v:34:y:2009:i:12:p:2680-2687
    DOI: 10.1016/j.renene.2009.04.031
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    References listed on IDEAS

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    1. Tonui, J.K. & Tripanagnostopoulos, Y., 2007. "Improved PV/T solar collectors with heat extraction by forced or natural air circulation," Renewable Energy, Elsevier, vol. 32(4), pages 623-637.
    2. Moshfegh, B. & Sandberg, M., 1998. "Flow and heat transfer in the air gap behind photovoltaic panels," Renewable and Sustainable Energy Reviews, Elsevier, vol. 2(3), pages 287-301, September.
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    Cited by:

    1. María Herrando & Alba Ramos, 2022. "Photovoltaic-Thermal (PV-T) Systems for Combined Cooling, Heating and Power in Buildings: A Review," Energies, MDPI, vol. 15(9), pages 1-28, April.
    2. Song, Zhiying & Ji, Jie & Zhang, Yuzhe & Cai, Jingyong & Li, Zhaomeng & Li, Yunhai, 2023. "Mathematical and experimental investigation about the dual-source heat pump integrating low concentrated photovoltaic and finned-tube exchanger," Energy, Elsevier, vol. 263(PE).
    3. Gilani, Hooman Azad & Hoseinzadeh, Siamak & Karimi, Hirou & Karimi, Ako & Hassanzadeh, Amir & Garcia, Davide Astiaso, 2021. "Performance analysis of integrated solar heat pump VRF system for the low energy building in Mediterranean island," Renewable Energy, Elsevier, vol. 174(C), pages 1006-1019.
    4. Herrando, M. & Coca-Ortegón, A. & Guedea, I. & Fueyo, N., 2023. "Experimental validation of a solar system based on hybrid photovoltaic-thermal collectors and a reversible heat pump for the energy provision in non-residential buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 178(C).
    5. Poulet, P. & Outbib, R., 2015. "Energy production for dwellings by using hybrid systems based on heat pump variable input power," Applied Energy, Elsevier, vol. 147(C), pages 413-429.
    6. Liu, Zichu & Quan, Zhenhua & Zhang, Nan & Wang, Yubo & Yang, Mingguang & Zhao, Yaohua, 2023. "Energy and exergy analysis of a novel direct-expansion ice thermal storage system based on three-fluid heat exchanger module," Applied Energy, Elsevier, vol. 330(PB).
    7. Fischer, David & Madani, Hatef, 2017. "On heat pumps in smart grids: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 70(C), pages 342-357.
    8. Lillo-Bravo, I. & Bobadilla, M.A. & Moreno-Tejera, S. & Silva-Pérez, M., 2020. "A novel storage system for cooling stand-alone photovoltaic installations," Renewable Energy, Elsevier, vol. 155(C), pages 23-37.
    9. Besagni, Giorgio & Croci, Lorenzo & Nesa, Riccardo & Molinaroli, Luca, 2019. "Field study of a novel solar-assisted dual-source multifunctional heat pump," Renewable Energy, Elsevier, vol. 132(C), pages 1185-1215.
    10. Song, Zhiying & Ji, Jie & Zhang, Yuzhe & Cai, Jingyong & Li, Zhaomeng, 2022. "Experimental and numerical investigation on a photovoltaic heat pump with two condensers: A micro-channel heat pipe/thermoelectric generator condenser and a submerged coil condenser," Energy, Elsevier, vol. 242(C).
    11. Khorasaninejad, Ehsan & Hajabdollahi, Hassan, 2014. "Thermo-economic and environmental optimization of solar assisted heat pump by using multi-objective particle swam algorithm," Energy, Elsevier, vol. 72(C), pages 680-690.
    12. Calise, Francesco & Dentice d'Accadia, Massimo & Figaj, Rafal Damian & Vanoli, Laura, 2016. "A novel solar-assisted heat pump driven by photovoltaic/thermal collectors: Dynamic simulation and thermoeconomic optimization," Energy, Elsevier, vol. 95(C), pages 346-366.
    13. Buker, Mahmut Sami & Riffat, Saffa B., 2016. "Solar assisted heat pump systems for low temperature water heating applications: A systematic review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 399-413.
    14. Song, Zhiying & Ji, Jie & Zhang, Yuzhe & Cai, Jingyong & Li, Zhaomeng, 2022. "Research on the multifunction concentrated solar-air heat pump system," Renewable Energy, Elsevier, vol. 198(C), pages 679-694.

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