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Comparison of performance characteristics of desiccant coated air-water heat exchanger with conventional air-water heat exchanger – Experimental and analytical investigation

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  • Sun, X.Y.
  • Dai, Y.J.
  • Ge, T.S.
  • Zhao, Y.
  • Wang, R.Z.

Abstract

In this study, the heat and mass transfer characteristics of desiccant coated heat exchanger (DCHE) and conventional heat exchanger are compared by experiments. A general-purpose test platform is built to test and compare the characteristics above. Based on the designed experimental setup, two heat exchangers of different depths of fins conventional/desiccant coated are experimentally investigated and compared with the given performance evaluation standards. In addition, parametric influences of inlet air velocity, hot water temperature and cycle time are analysed. Experimental results show that compared with the conventional heat exchanger, the heat transfer capacity of DCHE is reduced by 30% because of the heat resistance produced by desiccant coating. Pressure drop and Euler number are both increased by 60% approximately for the same reason. Doubling the depth of fins increases the average moisture removal by 40% and COPth by 10%, without changing the other structure parameters.

Suggested Citation

  • Sun, X.Y. & Dai, Y.J. & Ge, T.S. & Zhao, Y. & Wang, R.Z., 2017. "Comparison of performance characteristics of desiccant coated air-water heat exchanger with conventional air-water heat exchanger – Experimental and analytical investigation," Energy, Elsevier, vol. 137(C), pages 399-411.
    • Handle: RePEc:eee:energy:v:137:y:2017:i:c:p:399-411
    DOI: 10.1016/j.energy.2017.03.078
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    Cited by:

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    5. Liu, M. & Prabakaran, V. & Bui, T. & Cheng, G.G. & Pang, W., 2023. "Three-dimensional numerical analysis of fin-tube desiccant-coated heat exchanger for air dehumidification in tropics," Applied Energy, Elsevier, vol. 331(C).
    6. Pan, Q.W. & Xu, J. & Ge, T.S. & Wang, R.Z., 2022. "Multi-mode integrated system of adsorption refrigeration using desiccant coated heat exchangers for ultra-low grade heat utilization," Energy, Elsevier, vol. 238(PB).
    7. Venegas, Tomas & Qu, Ming & Nawaz, Kashif & Wang, Lingshi, 2021. "Critical review and future prospects for desiccant coated heat exchangers: Materials, design, and manufacturing," Renewable and Sustainable Energy Reviews, Elsevier, vol. 151(C).
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    9. Feng, Y.H. & Dai, Y.J. & Wang, R.Z. & Ge, T.S., 2022. "Insights into desiccant-based internally-cooled dehumidification using porous sorbents: From a modeling viewpoint," Applied Energy, Elsevier, vol. 311(C).
    10. Zhang, Qunli & Li, Yanxin & Zhang, Qiuyue & Ma, Fengge & Lü, Xiaoshu, 2024. "Application of deep dehumidification technology in low-humidity industry: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 193(C).
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    14. Valarezo, Andres S. & Sun, X.Y. & Ge, T.S. & Dai, Y.J. & Wang, R.Z., 2019. "Experimental investigation on performance of a novel composite desiccant coated heat exchanger in summer and winter seasons," Energy, Elsevier, vol. 166(C), pages 506-518.
    15. Xu, F. & Bian, Z.F. & Ge, T.S. & Dai, Y.J. & Wang, C.H. & Kawi, S., 2019. "Analysis on solar energy powered cooling system based on desiccant coated heat exchanger using metal-organic framework," Energy, Elsevier, vol. 177(C), pages 211-221.

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