- 期刊
Improvement on the Efficiency of AMR Refrigeration Systems with Staggered Laminated Plates
交錯層狀磁製冷再生器之效能提升設計
摘要
Refrigeration of active magnetic regenerator (AMR) with no refrigerant consumption and compressors is a promising refrigeration technology. From a viewpoint of heat transfer, two problems restrict the efficiency of AMR. Weak heat transfer between magnetocaloric material (MCM) and working fluid as well as conducted heat from hot to cold side decreases the refrigeration capacity. To improve the two weaknesses, staggered breaking segments in rectangular MCM plates are adopted. AMR models with a length of 80 mm are analyzed numerically. As compared to the model with no breaking segments, the model C1 can reduce mass usage of MCM by 2.5%, increase the cooling power from 62.48 to 69.10 watts with the magnetic field of 0-1 T, the temperature span of 283-303 K, the operation period of 0.6 seconds, and the utilization factor of about 0.4. This study shows that the performance of novel AMR can be improved with staggered laminated plates.
並列摘要
磁製冷再生系統不需壓縮機與冷媒即可製冷，是一極有潛力的冷凍技術。然兩熱傳現象為目前的效能瓶頸：一為磁熱材料與工作流體間的熱傳速度；二為由熱端至冷端的熱量傳遞。本研究於平板式磁製冷再生器中增加交錯斷點，透過數值模擬比較80 mm長的再生器設計。與原再生器相比，C1模型能減少2.5%之磁熱材料使用；在0－1特斯拉、283－303K的溫差、工作週期0.6秒、利用因數約0.4時，將冷凍力由62.48增至69.10瓦。本研究證實，透過交錯層狀磁製冷再生器之設計，能增加磁製冷裝置之效能。