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Performance of a desiccant wheel cycle utilizing new zeolite material: Experimental investigation

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  • Al-Alili, Ali
  • Hwang, Yunho
  • Radermacher, Reinhard

Abstract

Removal of moisture from the air represents a considerable portion of the air conditioning load in hot and humid regions. It is a common practice to run air conditioning systems at temperatures lower than the moist air dew point temperature in order to accomplish dehumidification. Desiccant air conditioners offer a solution to meet the humidity and temperature requirements of buildings via decoupling latent and sensible loads. In this work, the performance of a new desiccant material is investigated experimentally. This desiccant material has a unique S-shape isotherm and can be regenerated using a low temperature heat source. The effects of the process air stream's temperature and humidity, the regeneration temperature, the ventilation mass flow rate, and the desiccant wheel's rotational speed on the cycle performance are investigated. ARI-humid conditions are used as a baseline. The moisture mass balance is maintained within 5% for all conducted tests. The results are presented in terms of the moisture removal rate and latent COPlat (coefficient of performance). The results show a desiccant wheel's COPlat higher than unity when it is coupled with an enthalpy wheel.

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  • Al-Alili, Ali & Hwang, Yunho & Radermacher, Reinhard, 2015. "Performance of a desiccant wheel cycle utilizing new zeolite material: Experimental investigation," Energy, Elsevier, vol. 81(C), pages 137-145.
    • Handle: RePEc:eee:energy:v:81:y:2015:i:c:p:137-145
    DOI: 10.1016/j.energy.2014.11.084
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    References listed on IDEAS

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    4. Wu, X.N. & Ge, T.S. & Dai, Y.J. & Wang, R.Z., 2019. "Investigation on novel desiccant wheel using wood pulp fiber paper with high coating ratio as matrix," Energy, Elsevier, vol. 176(C), pages 493-504.
    5. Kang, Hyungmook & Lee, Dae-Young, 2017. "Experimental investigation and introduction of a similarity parameter for characterizing the heat and mass transfer in polymer desiccant wheels," Energy, Elsevier, vol. 120(C), pages 705-717.
    6. Speerforck, Arne & Schmitz, Gerhard, 2016. "Experimental investigation of a ground-coupled desiccant assisted air conditioning system," Applied Energy, Elsevier, vol. 181(C), pages 575-585.
    7. Hwang, Won-Baek & Choi, Sun & Lee, Dae-Young, 2017. "In-depth analysis of the performance of hybrid desiccant cooling system incorporated with an electric heat pump," Energy, Elsevier, vol. 118(C), pages 324-332.
    8. Yang, Yifan & Cui, Gary & Lan, Christopher Q., 2019. "Developments in evaporative cooling and enhanced evaporative cooling - A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 113(C), pages 1-1.
    9. Feng, Changling & E, Jiaqiang & Han, Wei & Deng, Yuanwang & Zhang, Bin & Zhao, Xiaohuan & Han, Dandan, 2021. "Key technology and application analysis of zeolite adsorption for energy storage and heat-mass transfer process: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 144(C).
    10. Piero Bareschino & Francesco Pepe & Carlo Roselli & Maurizio Sasso & Francesco Tariello, 2019. "Desiccant-Based Air Handling Unit Alternatively Equipped with Three Hygroscopic Materials and Driven by Solar Energy," Energies, MDPI, vol. 12(8), pages 1-20, April.
    11. Peter Niemann & Finn Richter & Arne Speerforck & Gerhard Schmitz, 2019. "Desiccant-Assisted Air Conditioning System Relying on Solar and Geothermal Energy during Summer and Winter," Energies, MDPI, vol. 12(16), pages 1-20, August.

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