|Title:||熱泵冷凝乾燥應用研究||Other Titles:||A Study on Heat Pump Condensation Drying System||Authors:||黃禮棟
|Keywords:||熱泵;冷凝乾燥;能源效率;Heat pump;Condensation drying;Energy efficiency||Issue Date:||3-Sep-2015||Publisher:||農業試驗所||Journal Volume:||64||Journal Issue:||3||Start page/Pages:||189-195||Source:||台灣農業研究||Abstract:||
國際能源價格持續上漲聲中，節能及提升能源效率已成為焦點。熱泵吸取空氣中或水體中的熱能，經過vapor-compression refrigeration cycle 之蒸發、壓縮、冷凝及膨脹等過程，將熱能由較低處移往較高處，效率高又節能。因此，使用熱泵取代柴油或瓦斯以節省能源支出，已使熱泵成為熱門之工具。熱泵系統運轉時同步產生冷氣及熱氣，因此其能源效率極高，依介質區分型式為空氣對水與水對水2 種，本研究使用水對水熱泵系統。利用其產生之熱氣乾燥農產品及冷氣凝結乾燥過程中產生的水蒸氣，此乾燥方式可使農產品呈現良好色澤，除了提升乾燥農產品品質外，也提升能源利用效率，為節能減碳的有效利用方式。本所設置完成之熱泵系統冷凝乾燥機，經熱交換器交換後之乾燥熱風溫度可達65℃，冷水溫度達到12℃，總能源效率 (COP)值達到3.6 以上。
As the energy prices continue to hike internationally, energy saving and efficiency improving will become the focal issues. Heat pumps absorb heat in the ambient air or water through the evaporation, compression and expansion process of the Vapor Compression Refrigeration Cycle. It transfers the heat energy in an opposite direction of spontaneous heat flow. The heat pump system is energy efficient and saves a lot of energy. The application of heat pumps has become a hot tool to replace the diesel or gas burner in order to save energy costs effectively. The operation of a heat pump system transfers heat from one place to another. It can provide both heat and cold water simultaneously with proper device. Therefore, it operates with high energy efficiency. According to the source that a heat pump absorbs heat from and the destination it flows heat to, the heat pumps can be categorized into air-water heat pumps and water-water heat pumps. A water-water heat pump system was adopted in this study. The application of its hot air in drying agricultural products and cold air in condensing water vapor generated in the drying process allows agricultural products using this drying method showing good color. In addition to improve the drying quality of agricultural products, it also promotes energy efficiency. It is an effective way to save energy and reduce carbon emission. The heat pump condensing dryer set up in Taiwan Agricultural Research Institute (TARI) can provide 65℃ hot air for drying through the heat exchanger and the cold water temperature reaches as low as 12℃. The estimated total energy efficiency of the system (COP) is higher than 3.6.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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