Performance Investigation of Heat Exchanger Circuit and Supersaturated Spray Cooling

本研究希望設計出一高效能的冷能循環系統，利用室內負荷造霧之蒸發性冷卻製冷，再利用經管排配置後之高效能熱管，以達到節能的目的。 本研究主要分為三個部份。第一部份是對超音波造霧器作性能測試；而第二、三部分則是分別為風量與工作流體不同流量下，超飽和噴霧對於系統製冷和預冷影響。 經實驗結果發現，當風量越小，所能霧化以及熱交換的時間較長且工作流體流量較大時，能夠循環預冷的能力較強；當工作流體流量越大，熱傳換熱量可以較大，對於冷能回收越好。其中節能效益以中風量以及流體流量越大會有最佳值，可大幅增加預冷效果並減低冰水主機的設備負載，而本研究所得到的各項參數結果，可以作為冷能回收系統作設計參數的預測。The study intends to develop a higher efficiency cooling cycle system which combine the ultra sonic humidifier to obtain evaporate cooling and heat pipe in order to achieve energy saving. There are three parts in this research. The first part is related to the performance of the Ultra-sonic humidifier, and then we discuss the influence of the flow of wind and work fluid on the pre-cooling system with the supersaturated spray cooling. Results of this study show that if the flow of wind is smaller, the ability of pre-cooling will be better. This is because there is more time for the working fluid to perform heat transfer. In addition, the greater the flow rate of working fluid, the better the effect of the recycling.The energy saving efficiency has maximum value at 1338 CMH for air and 16 LPM for working fluid. The main purpose of the system is to reduce the load of the chiller by increasing precooling effect Thus, the results can design an optimizing process of cold energy recycling system