水源熱泵系統應用於典藏文物空調箱之節能驗證研究

A Study of Energy-saving Validation for Water Source Heat Pump Applied on the Air-Handling Unit of Preserving Heritage

文物典藏室使用的一般空調箱於恆溫恆濕的環境條件下，傳統上，以設置儲冰式空調系統、鍋爐及電熱系統，分別獨立供應空氣調節過程所需之冷熱需求，造成整體耗能可觀。本研究提出水源熱泵系統與之整合應用，經以全尺度實測驗證系統運轉數據統計分析，獲得加熱方面之節能減碳效益達50%以上之良好成效。若將冷卻除濕部分納入，則得到總體節能率為46%，且因有水源熱泵系統提供預冷盤管之設計，經重新調配顯熱比後，獲得提升5%之除濕能力。本研究進一步分析其最佳化操作策略，以調升除濕盤管出風溫度參數為優先，可獲致節省28%之運轉電力消耗。當空調部份負載情況下，可搭配提高預冷盤管冰水供應溫度之操作，以增加整體節能效果。本研究成果建議作為館方之節能運轉操作策略參考，並為展覽類建築使用之恆溫恆濕空調箱提供一設計應用對策。

Conventionally, a museum storeroom using an air-handling unit have been provided, under a constant-temperature and constant-humidity condition, by ice storage AC systems, boilers and an electrical heating system to meet its cooling and heating needs in the air-conditioning process, which gives rise to lots of power consumption. A helpful approach to this problem is an outdoor AHU integrated with a water-source heat pump system, validating the energy savings of exceeding 50% in the heating aspect by means of a statistic analysis of the full scale experimental validation. Furthermore, the overall effect would reach 46% if it took cooling and dehumidification into account. Because a water-source heat pump system has a precooling design in relation to AHU, it can obtain an improvement of 5% in dehumidifying capability after readjusting the sensible heat ratio. This study analyzes the optimal operational strategy further. Through raising air temperature parameters of the dehumidifying coil as a priority, it can save power consumption by 28%. While operating at partial load, it can simultaneously raise the chilled water supply temperature at the precooling coil, in order to increase the overall energy-saving effect. A reference for energy-saving operation strategy of the Museum is suggested by the results of this study, and also provides a design application for AHU for use in exhibition building.