空调温区自由活塞斯特林制冷机中回热器的优化设计

Optimization Design of Regenerator of Free Piston Stirling Cryocooler in Air-conditioning Temperature Zone

摘要: 根据一台空调温区自由活塞斯特林制冷机（FPSC）的设计要求（300 W@280 K），对其关键部件回热器进行了优化设计。回热器填料选择了流阻损失较小的卷箔式结构和聚酯材料。搭建了Sage整机模型和回热器模型以分析不同回热器长度和孔隙率对回热器换热损失及整机制冷性能的影响，280 K制冷温度下回热器长度和孔隙率的优化结果分别为32 mm和76%。最后分析了FPSC内部换热损失的分布情况，验证了卷箔式结构在空调温区应用中的优势。

Abstract: Based on the design requirements of a free piston Stirling cryocooler(FPSC)in air-conditioning temperature zone(300 W@280 K),the optimization design of the regenerator,a key component of FPSC,is performed.Roll foil structure with less flow resistance loss and polyester material are selected as regenerator filled material.The Sage models of FPSC and regenerator are built to analyze the effects of different regenerator length and porosity on heat transfer loss and refrigeration performance.The optimization results of regenerator length and porosity at 280 K are 32 mm and 76%,respectively.Finally,the distribution of heat transfer loss in FPSC is analyzed.And the advantage of the roll foil structure in air-conditioning temperature zone is verified.