Theoretical and experimental studies on isothermal adsorption and desorption characteristics of a desiccant-coated heat exchanger

Tomohiro Higashi; Li Zhang; Michiyuki Saikawa; Mao Yamaguchi; Chaobin Dang; Eiji Hihara

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Theoretical and experimental studies on isothermal adsorption and desorption characteristics of a desiccant-coated heat exchanger

机译：一种干燥剂涂层热交换器等温吸附和解吸特性的理论与实验研究

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?Performance of desiccant-coated heat exchangers was experimentally measured.

?Isothermal adsorption and desorption experiments were conducted.

?Theoretical calculation assumed diffusion of water inside desiccant layer.

?Equivalent diffusion coefficient was dependent on the temperature.

?Theoretical model could predict experimental results under different conditions.

Abstract

Dynamic characteristics of desiccant–coated heat exchangers (DCHEs) were experimentally measured by wind tunnel. The surface of the DCHE was coated with polymer sorbent desiccant. The isothermal adsorption and desorption experiments were conducted under the condition where the temperatures of the air and brine passing through the DCHE were identical.

The experimental results were compared to that obtained from theoretical calculations. A diffusion model predicting the distribution of moisture concentration and temperature in the desiccant layer was introduced. The equivalent diffusion coefficient of the water inside the desiccant layer was determined from the experimental results.

The adsorption and desorption speeds were at the maximum values at the beginning of the sorption processes, and then they gradually decreased. The equivalent diffusion coefficient was dependent on the temperature. Assuming the temperature dependence of the diffusion coefficient, the calculated sorption performance correlated well with that obtained from the experimental results.

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来源
《International Journal of Refrigeration》 |2017年第2017期|共10页
作者
Tomohiro Higashi; Li Zhang; Michiyuki Saikawa; Mao Yamaguchi; Chaobin Dang; Eiji Hihara;
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作者单位

Department of Human and Engineered Environmental Studies The University of Tokyo;

Central Research Institute of Electric Power Industry;

Central Research Institute of Electric Power Industry;

Department of Human and Engineered Environmental Studies The University of Tokyo;

Department of Human and Engineered Environmental Studies The University of Tokyo;

Department of Human and Engineered Environmental Studies The University of Tokyo;

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原文格式 PDF
正文语种 eng
中图分类制冷理论;
关键词
Desiccant; Heat exchanger; Adsorption; Mass transfer; Heat transfer; Diffusion coefficient;

机译：干燥剂;热交换器;吸附;传质;传热;扩散系数;

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Theoretical and experimental studies on isothermal adsorption and desorption characteristics of a desiccant-coated heat exchanger

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