4.5 Article

Experimental study on silica gel-LiCl composite desiccants for desiccant coated heat exchanger

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2014.11.015

关键词

Composite desiccant; Thermal conductivity; Texture property; Dehumidification capacity; Desiccant coated heat exchanger; Sorption

资金

  1. Key Program of National Natural Science Foundation of China [51336004]
  2. National Research Foundation for the Doctoral Program of Higher Education of China [20110073130010]
  3. Ministry of Education Innovation Team [IRT 1159]

向作者/读者索取更多资源

Desiccant coated aluminum-fin is an important part in desiccant coated heat exchanger (DCHE). It will affect the overall performance of this novel solid desiccant component. In the paper, different silica gel-LiCl composite desiccant coated aluminum sheets were fabricated and some key parameters were studied. Nitrogen adsorption suggested that texture properties of composite desiccants were different from silica gel due to impregnated salt and combined action of silica sol and silica gel. The highest thermal conductivity of composite sheets was 5.8 Wm(-1)K(-1), which is twice of silica gel coated one. Sorption kinetics indicated that composite sheets exhibited higher dynamic sorption quantities and faster sorption rates. Sorption isotherms were also obtained and fitted with Dubinin -Astakhov equation. Besides, dehumidification capacity of composite DCHE was tested and compared with silica gel one. Results indicated that enhanced dehumidification capacity can be achieved with use of composite desiccant in the DCHE system. (C) 2014 Elsevier Ltd and IIR. All rights reserved.

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