大功率斯特林制冷机的整机数值模拟  

Numerical simulation of a high power Stirling cryocooler

作　　者：蔡亚超 徐雅[1] 沈惬[1] 王凯[1] 邹江[1] 孙大明[1] 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027

出　　处：《低温工程》2014年第3期27-31,66,共6页Cryogenics

基　　金：国家自然科学基金(No.51276156);国家重点基础研究发展计划项目(No.2010CB227303)

摘　　要：应用低温制冷机整机模拟软件(SAGE)对一台"3LY—0.8/194"型斯特林制冷机开展了数值模拟研究,得到质量流率、工质压力以及声功、焓流等参数的变化规律,揭示了制冷过程中内部能量流的耦合作用关系。此外,基于回热器内工质的温度分布分析,发现该制冷机的部分回热器未得到有效利用,从而为即将开展的改进实验研究提供了思路。模拟结果显示该制冷机可以达到37.5 K最低制冷温度,在77.35 K能够提供1 044 W制冷量,输入PV功为9 416 W,相对卡诺循环效率达到30.2%。A high-power Stirling cryocooler,which type is 3LY-0. 8 /194 was studied numerically by using commercial software SAGE,which shows the variation of mass flow rate and pressure,the distribution of acoustic power and enthalpy flow,reveals the coupling relationship of internal energy flows during the refrigeration process. Furthermore,the temperature distribution along the regenerator shows that the regenerator of the cryocooler is not utilized effectively,which provides a direction for future experimental improvement. According to the simulation,the cold head is able to reach a no-load refrigeration temperature of37. 5 K and a cooling power of 1 044 W at 77. 35 K with a PV power of 9 416 W,with Carnot efficiency reaching up to 30. 2%.

关 键 词：斯特林制冷机 数值模拟 回热器 SAGE 

分 类 号：TB651[一般工业技术—制冷工程]