抄録
Adsorption/desorption rate of vapor to adsorbent on an adsorption heat exchanger is one of the important characteristics in order to design and improve the performance of adsorption chillers and dehumidifying/humidifying desiccant systems effectively. In the present study, for a silica gel thin film adsorbent coated on an aluminum plate in a cross fin tube heat exchanger, we measured the equilibrium adsorption of water vapor with TGA and the adsorption/desorption rate with gravimetric method under the different flow velocity of humid air. The equilibrium adsorption was formulated with function of relative humidity. In addition, we obtained overall mass transfer resistance related to both the mass diffusion in the film and the mass transfer in the boundary layer on the film. It was clarified that the influence of the resistance on the reaction rate appeared only at the beginning of reaction, and the resistance decreased with the increase of the velocity, especially in adsorption. Furthermore, the resistance in desorption was less than half in adsorption. Consequently, the resistance in the boundary layer was a negligible quantity for desorption when the flow rate was above 0.1 m/s. Finally, correlations were proposed to predict these resistances.
本文言語 | 英語 |
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ホスト出版物のタイトル | ACRA 2016 - 8th Asian Conference on Refrigeration and Air-Conditioning |
出版社 | Asian Conference on Refrigeration and Air Conditioning (ACRA) |
出版ステータス | 出版済み - 2016 |
イベント | 8th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2016 - Taipei, 台湾 継続期間: 5月 15 2016 → 5月 17 2016 |
その他
その他 | 8th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2016 |
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国/地域 | 台湾 |
City | Taipei |
Period | 5/15/16 → 5/17/16 |
!!!All Science Journal Classification (ASJC) codes
- 制御およびシステム工学
- 機械工学
- 凝縮系物理学
- 電子工学および電気工学