相變化熱控模組

Phase Change Module, PCM

相變化熱控模組是一種高熱容裝置，利用物質相態轉變的特性，以最小溫度變化進行熱能儲存或釋放。一般而言，物質相變化之潛熱可較其固態或液態顯熱高出一至兩個數量級。因此，該模組可作為優異的被動式溫控裝置，減緩電子或光學物件之溫度梯度，進而達到優化性能或延長使用壽命的效益，尤其適用於高熱通量、低熱容、週期性操作或環境之系統或元件。

PCM, a high thermal capacitor, can absorb or release heat energy with minimal temperature change during the phase transition. The latent heat of phase transition is at least one to two orders of magnitude higher than the sensible heat that can be stored by the specific heat of material in its solid or liquid phase. It is an excellent passive cooling strategy for thermal management, in cases where the application involves high heat flux, low thermal inertia, cyclical operation or cyclical thermal environments. In practice, the PCM is a properly selected material contained in a hermetically sealed enclosure with heat transfer structure. It has numerous practical challenges that must be addressed to obtain a volume or mass optimized, fully functional and highly reliable design.