Desiccant Heating, Ventilating, and Air-Conditioning Systems by Napoleon Enteria, Hazim Awbi, Hiroshi Yoshino

By Napoleon Enteria, Hazim Awbi, Hiroshi Yoshino

This e-book provides the mandatory primary wisdom within the examine, improvement, layout, choice, and alertness of desiccant heating, ventilating, and air-conditioning platforms. It covers the verified installations in numerous weather conditions and construction varieties. moreover, complicated functionality assessment recommendations are offered, overlaying thermodynamic, fiscal, and environmental features. therefore, the ebook is a vital source for undergraduate and graduate scholars, layout and deploy engineers, researchers and scientists, construction vendors and occupants, and effort and environmental coverage makers.

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25). Note that the present results differ from earlier studies, which found that the optimum rotating speed was a condition of the fixed regeneration temperature and Ar =Ap . 2. Therefore, the highest optimum rotation speed is found at R ¼ 0:2 at low regeneration temperatures, but R ¼ 0:05 at high regeneration temperatures. D. Chung Fig. 15 Variations of the optimum rotation speed as a function of the regeneration temperature and isotherm shape [54] Fig. 16 Variations of the optimum value of Ar =Ap as a function of the regeneration temperature and isotherm shape [54] observing differences in water content of process and regeneration.

Gao et al. [37] discussed the effect of the felt thickness and the passage shape on the performance of a desiccant wheel and found that as the thickness of the sorbent increases, the moisture removal capacity (MRC) of the desiccant wheel improves, and a sinusoidal air flow passage was the best shape for greater MRC. For the same sine-shaped channel, the amount of heat transfer may vary greatly according to the aspect ratio. In the case of (E), the amount of heat transfer was greatest at an aspect ratio of a:b ¼ 2:1.

However, it is not a heat-resistant material and therefore is only adequate for low regeneration temperatures. Zeolites are a common alternative to silica gel because they have widespread chemical uses and can be synthesized according to the application requirements. Conventional zeolites, such as Type A and Type Y, show a typical S-shaped adsorption isotherm, which is ideally suited for dehumidification and drying processes. , the minimal amount of adsorbed water vapor is achieved only at extremely low relative humidity.

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