水蒸気吸着体の放射率測定

濱本 芳徳, 森 英夫, 赤井 隆文, 三谷 賢史

研究成果: Contribution to journalArticle査読

抄録

One of the aims in this study is a development of a numerical analysis model to evaluate a desiccant dehumidifier which regenerates with concentration of solar ray. Inside of a desiccant rotor, in addition to convective heat transfer between airflow and adsorbent surface, radiative heat transfers from one adsorbent surface to another. As a matter of course, absorption and transmission of solar ray on the adsorbent surface occur. It is necessary to measure the emissivity, reflectivity, absorptivity and transmissivity. This paper presents the measurement of emissivity of vapor adsorbents. The measuring apparatus consists of an infrared radiation thermometer. Emissivity was measured in some temperature and humidity conditions. It was clarified that the emissivity decreased with the increase of relative humidity of adsorbent. The emissivity of silica gel particle was less than about 25% in high relative humidity condition compared with dry condition. An empirical formula was presented to predict an influence of the equilibrium adsorption on the emissivity. Moreover, it was clarified that the influence of the equilibrium adsorption on the emissivity of a sheet of adsorbent rotor was negligible.
寄稿の翻訳タイトルMeasurement of Emissivity of Water Vapor Adsorbents with Infrared Radiation Thermometer
本文言語日本語
ページ(範囲)295-304
ページ数10
ジャーナル日本冷凍空調学会論文集
26
3
DOI
出版ステータス出版済み - 9 30 2009

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