微型化蒸氣壓縮循環電子散熱系統研究

Abstract

蒸氣壓縮循環系統是一具有高COP與強冷卻能力的冷卻系統，但目前的系統體積都還太大，在實際應用之前，需先把系統體積縮小。本研究的目的在於探討微型化的蒸氣壓縮系統的特性與各元件對於系統的影響。本研究主要分為兩個部份：穩態實驗與系統模擬。 在實驗方面，本研究設計並組裝一微型化蒸氣壓縮循環系統。系統整體重量約6公斤，系統之尺寸約為160×350×150mm3。設計完整的實驗方法與流程，分析加熱瓦數、膨脹閥開度與壓縮機轉速對系統性能之影響。實驗結果顯示本研究所開發之散熱系統最大冷卻能力為150W、COP由1.36~ 4.25。 在模擬方面，建構出一套能用來分析與預測的蒸氣壓縮循環系統的模擬程式。並針對冷凝器與蒸發器，討論相關冷凝鰭片尺寸與蒸發流道尺寸參數對於系統的影響。並利用此程式進行系統的最小化設計。模擬結果與實驗數據相當吻合，誤差在10%以內。

Vapor compression refrigeration system (VCRS) is a cooling system that has high COP and high cooling capacity. The research emphasizes on the characteristics of a miniature VCRS and how the experimental factors affect it. This research can be divided into two parts: steady state experiments and VCRS simulations. In steady state experiments, a VCRS has been designed and assembled. The whole system is about 6 kg weight, and the size of the system is about 160×350×150 mm3. Experimental investigations are conducted to analyze that how the orifice of the expansion valve, heating watt and the rotational speed of the compressor affect the system performances. The results show that the system has a maximum cooling capacity 150W, and the COP of the system varies from 1.36 to 4.25. In VCRS simulation, a program is written to analyze and predict its performances. The program is used to analyze that how the size of the condenser and the evaporator influences the system performances. The errors of the simulations are less than 10%.