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Thermal performance estimation of ammonia-water plate bubble absorbers for compression/absorption hybrid heat pump application

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  • Jung, Chung Woo
  • An, Seung Sun
  • Kang, Yong Tae

Abstract

The objectives of this paper are to analyze the heat transfer characteristics during the NH3–H2O absorption process in plate heat exchangers and to develop the experimental correlations of the heat transfer coefficient for the compression/absorption hybrid heat pump application. The parametric analysis on the effects of the absorber internal pressure, ammonia weak solution concentration and absorber geometric dimensions on the absorber capacity and system COP (coefficient of performance) is carried out. From the experimental results, the maximum absorber capacity of 7.3 kW, COP of 2.66 and the maximum hot water outlet temperature of 80.7 °C are obtained. It is concluded that the heat transfer coefficient of solution side increases with increasing the aspect ratio (L/D) while it does not significantly depend upon the aspect ratio (W/D). Finally, an experimental Nusselt number correlation is developed with ±20% error band and compared with the other correlation from the literature.

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  • Jung, Chung Woo & An, Seung Sun & Kang, Yong Tae, 2014. "Thermal performance estimation of ammonia-water plate bubble absorbers for compression/absorption hybrid heat pump application," Energy, Elsevier, vol. 75(C), pages 371-378.
    • Handle: RePEc:eee:energy:v:75:y:2014:i:c:p:371-378
    DOI: 10.1016/j.energy.2014.07.086
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    References listed on IDEAS

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    1. Ventas, R. & Vereda, C. & Lecuona, A. & Venegas, M., 2012. "Experimental study of a thermochemical compressor for an absorption/compression hybrid cycle," Applied Energy, Elsevier, vol. 97(C), pages 297-304.
    2. Kim, Jiyoung & Park, Seong-Ryong & Baik, Young-Jin & Chang, Ki-Chang & Ra, Ho-Sang & Kim, Minsung & Kim, Yongchan, 2013. "Experimental study of operating characteristics of compression/absorption high-temperature hybrid heat pump using waste heat," Renewable Energy, Elsevier, vol. 54(C), pages 13-19.
    3. Le Lostec, Brice & Galanis, Nicolas & Millette, Jocelyn, 2013. "Simulation of an ammonia–water absorption chiller," Renewable Energy, Elsevier, vol. 60(C), pages 269-283.
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    Cited by:

    1. Gao, J.T. & Xu, Z.Y. & Wang, R.Z., 2021. "An air-source hybrid absorption-compression heat pump with large temperature lift," Applied Energy, Elsevier, vol. 291(C).
    2. Hamid, Khalid & Ren, Shuai & Tolstorebrov, Ignat & Hafner, Armin & Wang, Chi-Chuan & Sajjad, Uzair & Eikevik, Trygve M., 2025. "Development and experimental assessment of oil free combine absorption-compression heat pump with NH3/H2O mixture working fluid," Applied Energy, Elsevier, vol. 383(C).
    3. Wu, Xi & Xu, Shiming & Jiang, Mengnan, 2018. "Development of bubble absorption refrigeration technology: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3468-3482.
    4. Amaris, Carlos & Vallès, Manel & Bourouis, Mahmoud, 2018. "Vapour absorption enhancement using passive techniques for absorption cooling/heating technologies: A review," Applied Energy, Elsevier, vol. 231(C), pages 826-853.
    5. Ji, Qiang & Pan, Tengxiang & Li, Yizhen & Che, Chunwen & Huang, Gongsheng & Yin, Yonggao, 2025. "Thermal gradient optimization in independent cascade heat pumps for efficient ultra-high temperature heating," Applied Energy, Elsevier, vol. 384(C).
    6. Ji, Qiang & Che, Chunwen & Yin, Yonggao & Huang, Gongsheng & Pan, Tengxiang & Zhao, Donglin & Wang, Yikai, 2024. "Optimizing working fluids for advancing industrial heating performance of compression-absorption cascade heat pump," Applied Energy, Elsevier, vol. 376(PB).

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