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Experimental studies on an air-cooled two-stage NH3-H2O solar absorption air-conditioning prototype

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  • Du, S.
  • Wang, R.Z.
  • Lin, P.
  • Xu, Z.Z.
  • Pan, Q.W.
  • Xu, S.C.

Abstract

An air-cooled two-stage NH3-H2O absorption refrigeration system is proposed for potential application of residential small scale cooling system driven by solar heated hot water. It can reduce the initial fabrication and maintenance costs of both the solar collection system and the absorption chiller. An experimental prototype for 2 kW cooling capacity has been built to investigate the feasibility and performance of the proposed system. The experimental results indicate that the prototype operates smoothly and steadily. When the prototype is driven by 85 °C hot water with an evaporating temperature of 8 °C and ambient air temperature of 29 °C, its thermal COP and electric efficacy (ε) reach 0.21 and 5.1, respectively. COP stabilizes within the range of 0.18–0.25, and ε varies between 3.6 and 5.1 under air-conditioning conditions in summer, which are the right applications of air-cooled two-stage absorption systems. The study reveals the technical feasibility of the air-cooled two-stage NH3-H2O absorption system. It provides a way to develop low-cost small bulk solar absorption air-conditioning systems for residential applications.

Suggested Citation

  • Du, S. & Wang, R.Z. & Lin, P. & Xu, Z.Z. & Pan, Q.W. & Xu, S.C., 2012. "Experimental studies on an air-cooled two-stage NH3-H2O solar absorption air-conditioning prototype," Energy, Elsevier, vol. 45(1), pages 581-587.
    • Handle: RePEc:eee:energy:v:45:y:2012:i:1:p:581-587
    DOI: 10.1016/j.energy.2012.07.041
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    References listed on IDEAS

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    5. Cabeza, Luisa F. & Solé, Aran & Barreneche, Camila, 2017. "Review on sorption materials and technologies for heat pumps and thermal energy storage," Renewable Energy, Elsevier, vol. 110(C), pages 3-39.
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    9. Wu, Wei & Shi, Wenxing & Wang, Jian & Wang, Baolong & Li, Xianting, 2016. "Experimental investigation on NH3–H2O compression-assisted absorption heat pump (CAHP) for low temperature heating under lower driving sources," Applied Energy, Elsevier, vol. 176(C), pages 258-271.
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    11. Abed, Azher M. & Alghoul, M.A. & Sopian, K. & Majdi, Hasan Sh. & Al-Shamani, Ali Najah & Muftah, A.F., 2017. "Enhancement aspects of single stage absorption cooling cycle: A detailed review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 1010-1045.
    12. Fong, K.F. & Lee, C.K., 2014. "Performance advancement of solar air-conditioning through integrated system design for building," Energy, Elsevier, vol. 73(C), pages 987-996.
    13. Mendiburu, Andrés Z. & Roberts, Justo J. & Rodrigues, Letícia Jenisch & Verma, Sujit Kr, 2023. "Thermodynamic modelling for absorption refrigeration cycles powered by solar energy and a case study for Porto Alegre, Brazil," Energy, Elsevier, vol. 266(C).
    14. Chen, Wei & Chenbin, Xu & Wu, Haibo & Li, Zoulu & Zhang, Bin & Yan, He, 2021. "Thermal analysis and optimization of combined cold and power system with integrated phosphoric acid fuel cell and two-stage compression–absorption refrigerator at low evaporation temperature," Energy, Elsevier, vol. 216(C).
    15. Wu, Wei & Wang, Baolong & Shi, Wenxing & Li, Xianting, 2014. "An overview of ammonia-based absorption chillers and heat pumps," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 681-707.

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