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Experimental study of dehumidification performance and solar thermal energy enhancement properties on a dehumidification system using desiccant coated heat exchanger

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  • Chai, Shaowei
  • Chen, Erjian
  • Xie, Mingxi
  • Zhao, Yao
  • Dai, Yanjun

Abstract

Due to the high dehumidification performance realized by removing adsorption heat by inner cooing, desiccant coated heat exchanger (DCHE) has been proposed and widely studied. The heat pump is usually used as the cooling and heat sources of the dehumidification system composed of DCHE because the cooling and heat capacity could be provided by the heat pump at the same time. Moreover, considering the advantage of low-grade thermal energy utilization, solar thermal energy can be used to further enhance the regeneration of DCHE to improve dehumidification performance and energy efficiency. In this paper, the solar-enhanced fresh air dehumidification system using DCHE driven by heat pump was proposed and a series of experiments were conducted under typical Shanghai summer high humidity conditions. The typical moisture removal of the system can be increased by about 15% to 10.14 g/kgDA and the COP could be further increased by over 25% to 5.39. In addition, the influence of different regeneration temperatures enhanced by solar thermal energy on the system has also been studied. Considering the dehumidification performance improvement and energy utilization efficiency, the optimal regeneration temperature is between 60 °C and 65 °C for the system proposed in this paper.

Suggested Citation

  • Chai, Shaowei & Chen, Erjian & Xie, Mingxi & Zhao, Yao & Dai, Yanjun, 2022. "Experimental study of dehumidification performance and solar thermal energy enhancement properties on a dehumidification system using desiccant coated heat exchanger," Energy, Elsevier, vol. 259(C).
    • Handle: RePEc:eee:energy:v:259:y:2022:i:c:s0360544222018813
    DOI: 10.1016/j.energy.2022.124983
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    2. Zheng, Xu & Zhang, Yu & Wan, Tinghao & Chen, Kang, 2023. "Experimental study on the performance of a novel superabsorbent polymer and activated carbon composite coated heat exchangers," Energy, Elsevier, vol. 281(C).

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