- 學位論文
液體除濕系統季節性運轉條件 及節能效益評估
Assessment of Operating Conditions and Energy-Saving Performance for A Liquid Desiccant System in Hospital
摘要
氯化鈣液體除濕系統運用在高溫高濕的氣候條件時可使運轉風量843CMM離風濕球溫度18℃的外氣空調箱減少除濕負載約 500kWh，並可降低季節性電力尖峰耗電及減少冰水主機為了夏季尖峰季節的設置容量。同時，液體除濕系統可提高空氣中生物氣膠移除效果及提升室內空氣品質，降低生物氣膠含量。 本文之研究主要係探討開放式液體除濕系統，利用氯化鈣水溶液與空氣直接接觸，以氯化鈣液體除濕劑做為空調系統的排氣與外氣之間的熱傳媒介，藉此降低外氣空調箱除濕負載。 氯化鈣液體除濕劑可吸收空調系統所引入外氣中的水蒸汽、降低外氣濕度，減少空調系統設備除濕的能源消耗。但系統設置並非完全為了滿足空調系統全部的負載需求，目的是在空調系統排氣(exhaust air)於排放大氣之前盡可能將排氣中的能源回收再利用。系統運轉原理是利用外氣、氯化鈣液體除濕劑與空調系統排氣之間具有不同的水蒸汽分壓力(vapor pressure)，利用高壓移往低壓的熱力性質完成外氣除濕與氯化鈣液體濃度還原。 空氣通過除濕吸收塔與還原塔時，經水洗及過濾的效果後，再以空氣樣本採集、細菌培養及分析結果，可提高空氣中生物氣膠移除性。
並列摘要
It has been demonstrated that calcium chloride-containing liquid desiccant system could decrease not only the desiccation loads of outside air handling unit about 500 kWh under the condition of operating volume 843 CMM and the leaving air wet bulb temperature 18 ℃, but also the seasonal electric peak consumption and the volume of chiller prepared for summer season. Liquid desiccant system can enhance the removal of biological aerosols and, therefore, improve the indoor air quality. This study focus on the opened liquid desiccant system in which calcium chloride solution has direct contact with air and acts as a desiccant and heat transfer decrease the desiccation loads of outside air handling unit. Calcium chloride is able to absorb the moisture in the outside air through the air-conditioning system, to decrease the humidity of outside air, to lower the energy expenditure in desiccation of the air-conditioner. The design of the system is not only to meet the loading requirement of air-conditioning system, but also to achieve the goal of recovering the energy as much as possible in the exhaust air before it is expelled into atmosphere from the air-conditioning system.
參考文獻
延伸閱讀
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