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Performance analysis of a two-stage desiccant cooling system

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  • Tu, Rang
  • Liu, Xiao-Hua
  • Jiang, Yi

Abstract

Multi-stage desiccant systems are an effective way to improve the performance of desiccant dehumidification systems, which can greatly decrease the required regeneration temperature and make possible the utilization of exhaust heat from the heat pump. The performance of a heat pump-driven two-stage desiccant wheel system is analyzed in this paper. Models of the desiccant wheel and heat pump systems are utilized to predict system performance. The effects on system performance of the compressor power input, the heat exchange area distribution between evaporators and condensers, the wheel’s rotation speed, and the inlet parameters of the processed air are investigated. When the supplied air humidity ratio is 10g/kg, COPt of the desiccant system is 5.5 under Beijing summer condition. The key to improving system performance is to match the cooling capacity and exhaust heat provided by the heat pump with the requirements of dehumidification and regeneration. An improved system utilizing an indirect cooler to recover the cooling capacity from the indoor exhaust air is then proposed, with COPt improving by 15% compared to the original system.

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  • Tu, Rang & Liu, Xiao-Hua & Jiang, Yi, 2014. "Performance analysis of a two-stage desiccant cooling system," Applied Energy, Elsevier, vol. 113(C), pages 1562-1574.
    • Handle: RePEc:eee:appene:v:113:y:2014:i:c:p:1562-1574
    DOI: 10.1016/j.apenergy.2013.09.016
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    6. Tu, Rang & Liu, Xiao-Hua & Jiang, Yi, 2015. "Irreversible processes and performance improvement of desiccant wheel dehumidification and cooling systems using exergy," Applied Energy, Elsevier, vol. 145(C), pages 331-344.
    7. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2015. "Experimental assessment of the energy performance of a hybrid desiccant cooling system and comparison with other air-conditioning technologies," Applied Energy, Elsevier, vol. 138(C), pages 533-545.
    8. Gao, D.C. & Sun, Y.J. & Ma, Z. & Ren, H., 2021. "A review on integration and design of desiccant air-conditioning systems for overall performance improvements," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
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    10. Fu, Huang-Xi & Zhang, Li-Zhi & Xu, Jian-Chang & Cai, Rong-Rong, 2016. "A dual-scale analysis of a desiccant wheel with a novel organic–inorganic hybrid adsorbent for energy recovery," Applied Energy, Elsevier, vol. 163(C), pages 167-179.
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    14. Rambhad, Kishor S. & Walke, Pramod V. & Tidke, D.J., 2016. "Solid desiccant dehumidification and regeneration methods—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 73-83.
    15. Tu, Rang & Liu, Xiao-Hua & Jiang, Yi & Ma, Fei, 2015. "Influence of the number of stages on the heat source temperature of desiccant wheel dehumidification systems using exergy analysis," Energy, Elsevier, vol. 85(C), pages 379-391.
    16. B. Kiran Naik & Mullapudi Joshi & Palanisamy Muthukumar & Muhammad Sultan & Takahiko Miyazaki & Redmond R. Shamshiri & Hadeed Ashraf, 2020. "Investigating Solid and Liquid Desiccant Dehumidification Options for Room Air-Conditioning and Drying Applications," Sustainability, MDPI, vol. 12(24), pages 1-22, December.
    17. Qi Xu & Saffa Riffat & Shihao Zhang, 2019. "Review of Heat Recovery Technologies for Building Applications," Energies, MDPI, vol. 12(7), pages 1-22, April.
    18. Chiang, Yuan-Ching & Chen, Chih-Hao & Chiang, Yi-Chin & Chen, Sih-Li, 2016. "Circulating inclined fluidized beds with application for desiccant dehumidification systems," Applied Energy, Elsevier, vol. 175(C), pages 199-211.
    19. Zhang, Ning & Yin, Shao-You & Zhang, Li-Zhi, 2016. "Performance study of a heat pump driven and hollow fiber membrane-based two-stage liquid desiccant air dehumidification system," Applied Energy, Elsevier, vol. 179(C), pages 727-737.
    20. Ghiaus, Christian, 2014. "Linear algebra solution to psychometric analysis of air-conditioning systems," Energy, Elsevier, vol. 74(C), pages 555-566.
    21. Kojok, Farah & Fardoun, Farouk & Younes, Rafic & Outbib, Rachid, 2016. "Hybrid cooling systems: A review and an optimized selection scheme," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 57-80.
    22. Zhang, Zi-Yang & Cao, Xiang & Yang, Zhi & Shao, Liang-Liang & Zhang, Chun-Lu, 2019. "Modeling and experimental investigation of an advanced direct-expansion outdoor air dehumidification system," Applied Energy, Elsevier, vol. 242(C), pages 1600-1612.
    23. Zhou, Xingchao & Goldsworthy, Mark & Sproul, Alistair, 2018. "Performance investigation of an internally cooled desiccant wheel," Applied Energy, Elsevier, vol. 224(C), pages 382-397.
    24. Sheng, Ying & Zhang, Yufeng & Zhang, Ge, 2015. "Simulation and energy saving analysis of high temperature heat pump coupling to desiccant wheel air conditioning system," Energy, Elsevier, vol. 83(C), pages 583-596.
    25. Gado, Mohamed G. & Ookawara, Shinichi & Nada, Sameh & El-Sharkawy, Ibrahim I., 2021. "Hybrid sorption-vapor compression cooling systems: A comprehensive overview," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).

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