碩士 / 國立勤益科技大學 / 冷凍空調系 / 104 / Taiwan is an island that is surrounded by oceans and belongs to island climate country. Taiwan is most in high-humidity environment for whole year. Monsoon climate causes hot and humid environment in the summer. In recent years, the control technology of air humidity has been gradually introducing concepts such as independent control in temperature and humidity. Using desiccant material and vapor pressure which is different from air pressure absorb water molecules in the air in order to decrease humidity and energy consumption. This study uses silica gel as a desiccant material and designs different fin structures (flatbed-fin, groove-fin and installation of vortex generators), and effect of different fin structures using experiments to investigate on dehumidification enhancement and analysis the effects of inlet air state and air patterns toward dehumidification performance.
It is found that the groove-fin have dehumidification enhancement effect on flatbed-fin. Under the effect of different inlet velocities, the dehumidification enhancement capability is the best when the air velocity is 2.0m/s, the outlet humidity ratio downtrend is increased by 7~18%, the instant moisture removal is increased by about 50% and the accumulate moisture removal is increased by about 28% at the 5th min of experiment. In terms of the effect of inlet temperature, the dehumidification enhancement capability is the best when the temperature is 25℃, the outlet humidity ratio downtrend is increased by 4~9%, the instant moisture removal is increased by about 41%, and the accumulate moisture removal is increased by about 25% at the 5th min of experiment. In addition, according to the inlet velocity effect of the improved groove-fin on flatbed-fin, the dehumidification enhancement effect is better when the air velocity is 1.0m/s, the instant moisture removal is increased by about 79%, and the outlet humidity ratio downtrend of different air velocities is increased by 6~33%. However, according to the air velocity effect of vortex generators on the flatbed-fin, the dehumidification enhancement capability is the best when the air velocity is 2.5m/s, the instant moisture removal is increased by about 79%, and the outlet humidity ratio downtrend of different air velocities is increased by 3~42%. According to the effect of inlet humidity ratio, the instant dehumidification improve effectiveness is the best when the humidity ratio is 10g/kg, which is increased by about 63%.
| Identifer | oai:union.ndltd.org:TW/104NCIT5680013 |
| Date | January 2016 |
| Creators | Jian-An Chen, 陳建安 |
| Contributors | Yu-Lieh Wu, 吳友烈 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 107 |
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