工质和回热器参数对斯特林制冷机性能影响的研究

Influence of Working Fluids and Regenerator Parameters on Performance of Stirling Refrigerator

针对斯特林制冷机在环保、节能、结构紧凑等方面的优点,建立了一种应用于制冷温区(即:家用和商用冰箱领域,温度在173K～283K的范围)的整体式斯特林制冷机。并对其进行了不同工质(分别采用的氮气和氦气)和四种不同的回热器结构参数(文中表2)对整机性能影响的研究。研究结果表明:整体式斯特林循环制冷机应用于制冷温区时,各种结构间存在着最优匹配。四种回热器结构中结构3的系统整机性能最优。在最优匹配的结构中,不同工质氮气和氦气的最佳充气压力和制冷性能有所不同,在结构3中以氮气和氦气为工质的最佳充气压力分别为1MPa和1.3MPa,而制冷量和COP与转速的最优关系区域分别是:氮气为500～700r/min,氦气为800～1000r/min。

A V-type integrated Stirling refrigerator was developed. The influence of different working fluids and four configurations on the performance of the regenerator was investigated. The parameters such as power consumption and Coefficient of Performance （COP） were discussed at various rotating speed and charged pressure. The results show that in the Stirling refrigerator used at refrigeration temperature, the configuration 3 is the optimal structure match of this prototype unit with the optimal charging pressure of 1 MPa for nitrogen and 1.3 MPa for helium. In addition, the rotational speed for the optimal cooling capacity and COP is 500-700 r/min for nitrogen and 800-1000 r/min for helium.