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Performance evaluation of a novel multi-tray packed bed solid desiccant dehumidification system.

Author(s) : ABD-ELHADY M. M., EL-SHARKAWY I. I., HAMED A. M., SALEM M. S.

Type of article: IJR article

Summary

Configuration of the solid desiccant bed plays a critical role in the development of cost-effective thermally driven desiccant air-conditioning systems. In the present study, a novel multi-tray packed bed solid desiccant dehumidifier (MPBDD) was developed that can be used in conjunction with a traditional vapor-compression system. The proposed configuration aims to achieve high moisture removal from the air and minimize the system power consumption. A lab-scale test rig was designed, fabricated, and tested under different operation conditions. The effect of the inlet humidity, temperature, and flow velocity on the system performance has been experimentally investigated. Experimental results show that the proposed configuration exhibited an adsorption capacity of about 27% higher than that of the conventional systems. Moreover, the pressure drop through the newly designed desiccant bed was found to be 87% lower than that of the conventional wheel design. A dimensionless number called Total Performance Factor (TPF) was defined to be the ratio of heat dissipated for desiccant to pumping energy expended overcoming pressure drop in the device. It was found that in certain experiments it attained an average value of around 250. In this regard, the present study is critical for achieving high dehumidification capacity as well as energy savings in air conditioning applications.

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Pages: 403-415

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Details

  • Original title: Performance evaluation of a novel multi-tray packed bed solid desiccant dehumidification system.
  • Record ID : 30030920
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 146
  • Publication date: 2023/02
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2022.12.001

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