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Experimental validation of a theoretical model for a direct-expansion solar-assisted heat pump applied to heating

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  • Moreno-Rodriguez, A.
  • Garcia-Hernando, N.
  • González-Gil, A.
  • Izquierdo, M.

Abstract

This paper discusses the experimental validation of a theoretical model that determines the operating parameters of a DXSAHP (direct-expansion solar-assisted heat pump) applied to heating. For this application, the model took into account the variable condensing temperature, and it was developed from the following environmental variables: outdoor temperature, solar radiation and wind. The experimental data were obtained from a prototype installed at the University Carlos III, which is located south of Madrid. The prototype uses a solar collector with a total area of 5.6 m2, a compressor with a rated capacity of 1100 W, a thermostatic expansion valve and fan-coil units as indoor terminals. The monitoring results were analyzed for several typical days in the climatic zone where the machine was located to understand the equipment's seasonal behavior. The experimental coefficient of the performance varies between 1.9 and 2.7, and the equipment behavior in extreme outdoor conditions has also been known to determine the thermal demand that can be compensated for.

Suggested Citation

  • Moreno-Rodriguez, A. & Garcia-Hernando, N. & González-Gil, A. & Izquierdo, M., 2013. "Experimental validation of a theoretical model for a direct-expansion solar-assisted heat pump applied to heating," Energy, Elsevier, vol. 60(C), pages 242-253.
    • Handle: RePEc:eee:energy:v:60:y:2013:i:c:p:242-253
    DOI: 10.1016/j.energy.2013.08.021
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    References listed on IDEAS

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    1. Moreno-Rodríguez, A. & González-Gil, A. & Izquierdo, M. & Garcia-Hernando, N., 2012. "Theoretical model and experimental validation of a direct-expansion solar assisted heat pump for domestic hot water applications," Energy, Elsevier, vol. 45(1), pages 704-715.
    2. Izquierdo, M. & Moreno-Rodríguez, A. & González-Gil, A. & García-Hernando, N., 2011. "Air conditioning in the region of Madrid, Spain: An approach to electricity consumption, economics and CO2 emissions," Energy, Elsevier, vol. 36(3), pages 1630-1639.
    3. Mohanraj, M. & Jayaraj, S. & Muraleedharan, C., 2009. "Performance prediction of a direct expansion solar assisted heat pump using artificial neural networks," Applied Energy, Elsevier, vol. 86(9), pages 1442-1449, September.
    4. Kong, X.Q. & Zhang, D. & Li, Y. & Yang, Q.M., 2011. "Thermal performance analysis of a direct-expansion solar-assisted heat pump water heater," Energy, Elsevier, vol. 36(12), pages 6830-6838.
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    2. Shi, Guo-Hua & Aye, Lu & Li, Dan & Du, Xian-Jun, 2019. "Recent advances in direct expansion solar assisted heat pump systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 109(C), pages 349-366.
    3. Han, Youhua & Liu, Yang & Lu, Shixiang & Basalike, Pie & Zhang, Jili, 2021. "Electrical performance and power prediction of a roll-bond photovoltaic thermal array under dewing and frosting conditions," Energy, Elsevier, vol. 237(C).
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    5. Mohanraj, M. & Belyayev, Ye. & Jayaraj, S. & Kaltayev, A., 2018. "Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part-B: Applications)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 83(C), pages 124-155.
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    9. Badiei, A. & Golizadeh Akhlaghi, Y. & Zhao, X. & Shittu, S. & Xiao, X. & Li, J. & Fan, Y. & Li, G., 2020. "A chronological review of advances in solar assisted heat pump technology in 21st century," Renewable and Sustainable Energy Reviews, Elsevier, vol. 132(C).
    10. Kong, Xiangqiang & Jiang, Kailin & Dong, Shandong & Li, Ying & Li, Jianbo, 2018. "Control strategy and experimental analysis of a direct-expansion solar-assisted heat pump water heater with R134a," Energy, Elsevier, vol. 145(C), pages 17-24.
    11. Fan, Yi & Zhao, Xudong & Han, Zhonghe & Li, Jing & Badiei, Ali & Akhlaghi, Yousef Golizadeh & Liu, Zhijian, 2021. "Scientific and technological progress and future perspectives of the solar assisted heat pump (SAHP) system," Energy, Elsevier, vol. 229(C).
    12. Zhang, Feng & Cai, Jingyong & Ji, Jie & Han, Kedong & Ke, Wei, 2020. "Experimental investigation on the heating and cooling performance of a solar air composite heat source heat pump," Renewable Energy, Elsevier, vol. 161(C), pages 221-229.

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