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Investigation on activated carbon-sodium polyacrylate coated aluminum sheets for desiccant coated heat exchanger

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  • Chen, K.
  • Zheng, X.
  • Wang, S.N.

Abstract

Adsorption and desorption properties of desiccants are of key significances to the dehumidification performance of a compact dehumidification component named desiccant coated heat exchanger. This work developed novel activated carbon (AC) - sodium polyacrylate (PAAS) composite coated aluminum sheets with high adsorption property and good desorption ability. Adsorption and desorption properties of AC-PAAS coated aluminum sheets were investigated under different air conditions. Cyclic adsorption-desorption features with internal-cooling/heating were conducted. Results showed that composite coated aluminum sheets had nearly 2∼3 times higher water uptake than an AC coated sample in the range of medium- to high-relative humidity (60%∼90% RH). More than 95% of adsorbed water in composite samples was released at 70 °C & 20% RH, and 86% was still desorbed when the air temperature was decreased to 40 °C. Adsorption capacities and rate coefficients of composite samples with internal-cooling could be 2.3 and 1.5 times higher than those without. This paper provides a way to develop composite desiccants with high cyclic water uptake performance in the fields of adsorption cooling, solid desiccant air-conditioning and atmospheric water harvesting.

Suggested Citation

  • Chen, K. & Zheng, X. & Wang, S.N., 2022. "Investigation on activated carbon-sodium polyacrylate coated aluminum sheets for desiccant coated heat exchanger," Energy, Elsevier, vol. 245(C).
    • Handle: RePEc:eee:energy:v:245:y:2022:i:c:s0360544222001098
    DOI: 10.1016/j.energy.2022.123206
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    References listed on IDEAS

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    Cited by:

    1. Shao, Z. & Wang, Z.G. & Poredoš, P. & Ge, T.S. & Wang, R.Z., 2023. "Highly efficient desiccant-coated heat exchanger-based heat pump to decarbonize rail transportation," Energy, Elsevier, vol. 271(C).
    2. Liang, Jyun-De & Tsai, Lu-Kuan & Chai, Shaowei & Zhao, Yao & Chiang, Yuan-Ching & Dai, Yanjun & Chen, Sih-Li, 2023. "Experimental investigation and analysis of alumina/polymer/alginate composite desiccant materials," Energy, Elsevier, vol. 280(C).

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