- 學位論文
冷藏系統結合儲冰與熱回收裝置之效益評估
Evaluating the performance of freezing system after being attached with ice storage and heat recovery devices
摘要
本研究提出冷藏系統結合儲冰與熱回收裝置後之效益評估，研究中利用夜晚或離峰時段使用控制方法持續讓冷藏系統之壓縮機運轉進行儲冷，在白天或尖峰時段供給辦公室空調空間使用，藉此讓既有設備達到更有效能的應用及空調空間內減少使用空調設備時間進而達到節省電費；在熱回收方面則是利用冷凝器入口前加裝一組熱交換器，使壓縮機出口的高壓高溫冷媒與水進行熱交換，此過程中採用熱水泵持續循環，並將取得的熱能儲存於儲熱桶中，一方面提高系統運轉效益，另一方面儲熱桶中之溫水也可供應洗手間內之水龍頭使用。另由實驗結果得知，儲冰空調在室內負載100%(300W)之節省電費約72%，在室內負載75%(225W)之節省電費約66%，在室內負載50%(150W)之節省電費約64%，而全年各空調負載值之發生時數多在部份負載下運載，所以至少可以節省一半以上的電費。
並列摘要
The study proposes to develop a compound freezing system, through which the study evaluates its performance after being attached with freezing, ice storage and heat recovery devices, and then applied to hypermarkets. Experiments are made to analyze cost-saving effect of the system during peak and off-peak hours. During the night, the freezing system with low load stores ice to supply for the need of refrigeration in the office in the daytime. As a result, the existing equipment is able to be applied more efficiently, and the office area can save the electricity expenses for the use of air-conditioning equipment, thus achieving the effect of saving electricity expenses. As to heat recovery, at the inlet of the condenser, a heat exchanger is additionally installed, letting the high-pressure and high-temperature refrigerant at the outlet of compressor undertake heat exchange with water. In this process, continuous circulation is performed by hot water pump. The acquired heat energy is stored at a heat storage tank. On the one hand, the operation effect of the system can be enhanced; on the other, warm water can be supplied to the toilet for use. Experimental results show that ice-stored air-conditioning equipment with indoor load 100% (300W) can save electricity expenses by around 72%, indoor load 75% (225W) can save electricity expenses by around 66%, and indoor load 50% (150W) can save electricity expenses by around 64%. The time for occurrence of various air-conditioning load values in a year is mostly during the time with partial load. Therefore, at least half of electricity expenses can be saved.