應用除溼轉輪於冷卻水塔性能加強之研究

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Title:	應用除溼轉輪於冷卻水塔性能加強之研究 Performance Enhancement of Cooling Tower by Applying Desiccant Wheel
Authors:	彭偉倫
Contributors:	機械工程學系數位機電碩士班
Keywords:	除溼轉輪 air conditioning system
Date:	2023
Issue Date:	2023-07-31 09:13:19 (UTC+8)
Abstract:	台灣位於亞熱帶區，且屬於海島型氣候，夏季溫度可高達35℃，且相對濕度達 80%，因外氣濕度比過高，導致蒸發冷卻裝置效率不佳，因而使冰水主機效率降低，增加系統電力能耗。因此，本研究主要之目的為改善傳統空調系統進行空氣降溫與除濕的方式，並分別將空氣的顯熱與潛熱分開處理，顯熱部分；利用溫度較高的冰水(約18~20℃)進行空氣的顯熱處理並降溫，潛熱部分；則是利用吸附除濕的技術進行空氣的潛熱處理並除濕，最後並利用蒸發冷卻之技術再將空氣進行降溫，以達到將空氣降溫與除濕之目的，並改善傳統空調系統冰水操作溫度過低的耗能問題，且滿足室內舒適度之需求，並達到節約能源之目的。空調系統主要之目的為進行空氣的降溫與除濕，以滿足室內舒適度之需求，空氣的降溫主要是將空氣的顯熱移除，空氣的除濕則是將空氣的潛熱移除。對於高溫高溼的台灣氣候條件下，空氣顯熱與潛熱的熱移除量分別約占了全熱的30%與70%，因此空調系統所提供的能量大部分是給空氣進行潛熱的移除所使用，除此之外；為了將空氣中的水分移除，空調系統所供應的冰水溫度又需低於空氣的露點溫度以下才可進行除濕，為了達到此露點溫度，空調系統皆是提供約7~10℃的冰水與空氣進行熱交換，然而；當冰水溫度愈低時，空調主機的性能也隨之降低，因此造成空調主機極大之耗能。 Taiwan is located in the subtropical zone and has an island-type climate. In summer, the temperature can reach as high as 35°C and the relative humidity can reach 80%. Due to the high humidity ratio of the outside air, the efficiency of the evaporative cooling device is not good, which reduces the efficiency of the ice water host and increases System power consumption. Therefore, the main purpose of this study is to improve the traditional air-conditioning system for air cooling and dehumidification, and to treat the sensible heat and latent heat of the air separately. The sensible heat treatment and cooling of the air, the latent heat part; the latent heat treatment and dehumidification of the air using the technology of adsorption and dehumidification, and finally the cooling of the air by the technology of evaporative cooling to achieve the purpose of cooling and dehumidification of the air, and Improve the energy consumption of the traditional air-conditioning system due to the low operating temperature of ice water, meet the needs of indoor comfort, and achieve the purpose of saving energy. The main purpose of the air conditioning system is to cool and dehumidify the air to meet the needs of indoor comfort. The cooling of the air is mainly to remove the sensible heat of the air, and the dehumidification of the air is to remove the latent heat of the air. Under Taiwan’s high-temperature and high-humidity climate conditions, the sensible heat and latent heat removal of the air account for about 30% and 70% of the total heat, so most of the energy provided by the air conditioning system is to remove latent heat from the air. In addition, in order to remove the moisture in the air, the temperature of the ice water supplied by the air conditioning system must be lower than the dew point temperature of the air before dehumidification can be carried out. In order to achieve this dew point temperature, the air conditioning system provides The ice water at about 7~10℃ exchanges heat with the air. However, when the temperature of the ice water is lower, the performance of the air conditioner will also decrease, resulting in a huge energy consumption of the air conditioner.
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