冷凝器直接驅動熱管的熱泵傳熱分析與實驗研究
Heat transfer analysis and experimental research of heat pumps with condenser directly driving heat pipes
摘要：
冷凝器直接驅動熱管的熱泵，省去了水循環部分，具有啟動快、能效高的優勢。根據傳熱經驗公式，對冷凝器冷凝管束部分的傳熱過程進行了研究，結合實驗數據推導出傳熱經驗公式中的關鍵參數，并對熱阻分布進行了分析。搭建了實驗裝置，實驗結果顯示：冷凝管束傳熱過程的熱阻分布中，管外沸騰換熱熱阻所占份額最大；傳熱過程受冷凝管束的管壁厚度和換熱管數量影響不大；室內溫度18 ℃、室外溫度3.3 ℃時，系統的制熱COP達到9.43。
Abstract：
The heat pump with the condenser directly driving heat pipe which saves the water circulation part has the advantages of quick start and high energy efficiency. According to the empirical formula of heat transfer, the heat transfer process of the condensing tube bundle of the condenser is studied. Combined with the experimental data, the key parameters in the empirical formula of heat transfer are derived, and the distribution of thermal resistance is analysed. An experiment device is set up, and the experimental results show that the boiling heat transfer resistance outside the tube accounts for the largest share in the thermal resistance distribution of the condensing tube bundle. The heat transfer process is not greatly affected by the wall thickness of the condensing tube bundle and the number of heat pipes. The heating COP of the system reaches 9.43 when the indoor temperature is 18 ℃ and the outdoor temperature is 3.3 ℃.
Keywords:condenser;heatpipe;heatpump;heattransfer;systemperformance;thermalresistance;condensingtubebundle