- 學位論文
結合儲冰水與熱回收之冷凍系統研發
Research and development of Ice/Water Storage and Heat Recovery for Refrigeration System
摘要
本研究提出了一套冷藏結合空調及熱泵的複合式系統，旨在將夜晚冷藏設備負荷較低切換至儲冰水槽蒸發盤管，將儲冰槽內的水進行儲冰，並於白天時另供應給空調區間使用；另外，在冷凝器入口處加裝一組熱交換器，將壓縮機出口端的高壓高溫冷媒與水進行熱交換，與熱水槽內的水持續密閉循環，將系統中的熱值取出來使用，提高系統運轉效益。冷藏實驗設備方面包含壓縮機、水-氣冷複合式冷凝器、蒸發器盤管、膨脹閥、儲液器等；空調實驗設備包含小型送風機、水泵等。實驗場地則有一冷凍冷藏庫及一空調區間作為實驗負荷。由實驗結果得知，可將儲冰槽內的冰水溫度控制在3℃~6℃之間，外加一攪拌裝置強制其冰水循環，進而提升儲冰槽內熱傳效率。在儲冰槽冰水容積為1000L時有最佳的RTH值，而利用系統廢熱回收的熱水可從初溫25℃製熱至50℃，所需的時間為8小時。本研究成功研發冷藏結合空調以及熱泵複合系統，該系統可以最大可以提供到10RTH的儲冰能力以及提供10500kJ的熱值。
並列摘要
This study discusses the chiller combined heat pump and air conditioning system. when the Refrigeration Room's load is too low at night . Use of solenoid valve change channel to ice storage tank evaporator coil. The heat transfer of water and refrigerant in ice storage tank. And in the other supply to the air conditioning. In addition, a heat exchanger installed before into the condenser,Use of compressor discharge high temperature refrigerant for heat exchange with water, The water heat exchanger and hot water tank continuously closed loop. In this way the system waste heat has been into hot water tank.Improve the system efficiency. Experimental equipment includes refrigeration compressors, water - air cooled composite condenser, evaporator coil, expansion valve, reservoir, etc. Air conditioning experiment equipment includes a fan coil, water pump etc. Experimental site has a freezer room and a air-conditioning zone as the experimental load . Experimental results can be ice cold water tank temperature control between 3 ℃ ~ 6 ℃, with a mixing device to force the cold water circulation, thus enhancing heat transfer efficiency of ice storage tank where ice storage tank volume of 1000L, the best of RTH value, while the use of waste heat recovery hot water system from the initial temperature of 25 ℃ to 50 ℃ heating time as long as 8hours. In this study successful development of refrigeration and heat pump combined with air-conditioning system, the system can share the air conditioning load during the day and provide 10500kJ heating value.