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Thermodynamic analysis of two-component, two-phase flow in solar collectors with application to a direct-expansion solar-assisted heat pump

Author

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  • Aziz, W.
  • Chaturvedi, S.K.
  • Kheireddine, A.

Abstract

Two-phase flow of pure chlorofluorocarbon (CFC) refrigerants in solar collector tubes has been examined in previous studies in connection with applications in direct-expansion, solar-assisted heat pumps (DX-SAHP). The present work extends the thermodynamic analysis of solar collectors to the multicomponent and multiphase domain to cover newly proposed refrigerant mixtures which are potential candidates for replacing CFCs in future DX-SAHP systems. A computational methodology is developed to determine the size of a solar collector of a DX-SAHP that uses a binary refrigerant mixture whose thermodynamic and transport properties are predicted from a computer code. The energy equation for the elemental collector tube control volume, incorporating the local thermodynamic and heat transfer characteristics, is integrated to determine the tube length for a given set of inlet and exit thermodynamic states of the refrigerant mixture. Effects of various parameters such as the collector mass-flow rate and operating pressure, tube diameter and absorbed solar radiation on the collector tube length, heat transfer coefficient, and the local refrigerant temperature in the tube are also considered.

Suggested Citation

  • Aziz, W. & Chaturvedi, S.K. & Kheireddine, A., 1999. "Thermodynamic analysis of two-component, two-phase flow in solar collectors with application to a direct-expansion solar-assisted heat pump," Energy, Elsevier, vol. 24(3), pages 247-259.
    • Handle: RePEc:eee:energy:v:24:y:1999:i:3:p:247-259
    DOI: 10.1016/S0360-5442(98)00089-9
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    Cited by:

    1. 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.
    2. Sanaye, Sepehr & Chahartaghi, Mahmood, 2010. "Thermal modeling and operating tests for the gas engine-driven heat pump systems," Energy, Elsevier, vol. 35(1), pages 351-363.
    3. Choi, Jongmin & Kang, Byun & Cho, Honghyun, 2014. "Performance comparison between R22 and R744 solar-geothermal hybrid heat pumps according to heat source conditions," Renewable Energy, Elsevier, vol. 71(C), pages 414-424.
    4. Ozgener, Onder & Hepbasli, Arif, 2007. "A review on the energy and exergy analysis of solar assisted heat pump systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(3), pages 482-496, April.
    5. Ji, Jie & Liu, Keliang & Chow, Tin-tai & Pei, Gang & He, Wei & He, Hanfeng, 2008. "Performance analysis of a photovoltaic heat pump," Applied Energy, Elsevier, vol. 85(8), pages 680-693, August.
    6. Kim, Wonseok & Choi, Jongmin & Cho, Honghyun, 2013. "Performance analysis of hybrid solar-geothermal CO2 heat pump system for residential heating," Renewable Energy, Elsevier, vol. 50(C), pages 596-604.
    7. Jorge E. De León-Ruiz & Ignacio Carvajal-Mariscal, 2018. "Mathematical Thermal Modelling of a Direct-Expansion Solar-Assisted Heat Pump Using Multi-Objective Optimization Based on the Energy Demand," Energies, MDPI, vol. 11(7), pages 1-27, July.
    8. Mohanraj, M. & Belyayev, Ye. & Jayaraj, S. & Kaltayev, A., 2018. "Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part A: Modeling and modifications)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 83(C), pages 90-123.
    9. Amin, Zakaria Mohd. & Hawlader, M.N.A., 2013. "A review on solar assisted heat pump systems in Singapore," Renewable and Sustainable Energy Reviews, Elsevier, vol. 26(C), pages 286-293.
    10. Omojaro, Peter & Breitkopf, Cornelia, 2013. "Direct expansion solar assisted heat pumps: A review of applications and recent research," Renewable and Sustainable Energy Reviews, Elsevier, vol. 22(C), pages 33-45.
    11. Bakirci, Kadir & Ozyurt, Omer & Comakli, Kemal & Comakli, Omer, 2011. "Energy analysis of a solar-ground source heat pump system with vertical closed-loop for heating applications," Energy, Elsevier, vol. 36(5), pages 3224-3232.
    12. Ortega, N. & García-Valladares, O. & Best, R. & Gómez, V.H., 2008. "Two-phase flow modelling of a solar concentrator applied as ammonia vapor generator in an absorption refrigerator," Renewable Energy, Elsevier, vol. 33(9), pages 2064-2076.
    13. 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).
    14. Li, Y.W. & Wang, R.Z. & Wu, J.Y. & Xu, Y.X., 2007. "Experimental performance analysis and optimization of a direct expansion solar-assisted heat pump water heater," Energy, Elsevier, vol. 32(8), pages 1361-1374.

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