稳态强磁场实验装置低温系统360W/4.5K制冷循环热力学分析和优化计算  

Thermodynamic analysis and computational optimization of 360W/4.5K refrigeration cycle for steady high magnetic field facility cryogenic system

作　　者：高红彪[1] 欧阳峥嵘[1] 李俊杰[1] 

机构地区：[1]中国科学院强磁场科学中心,合肥230031

出　　处：《低温工程》2010年第4期42-46,共5页Cryogenics

摘　　要：稳态强磁场实验装置的超导线圈采用4.5K超临界氦进行冷却,制冷模式下,制冷机的设计容量为360W/4.5K。首先对氦制冷循环进行了热力学分析,然后以压缩机氦流量为优化对象,结合低温系统的工程要求,选取合适的参数,对制冷循环进行了优化计算。计算结果显示:液氮消耗量为28.50L/h,压机消耗功率约102kW,系统的制冷系数为0.0035。The coil of steady high magnetic field facility （ SHMFF） is cooled by supercritical helium at 4. 5 K,the refrigerator has a capacity of 360 W at 4. 5 K under refrigeration mode. Based on the project requirements of SHMFF cryogenic system,thermodynamic analysis and computational optimization were carried out. Proper thermodynamic parameters were chosen to minimize helium mass flow of twin screw compressor. The result shows that it consumes 28. 50 L/h liquid nitrogen and 102 kW compression power. The optimum coefficient of performance is 0. 003 5.

关 键 词：氦制冷机 制冷循环 热力学分析 优化计算 

分 类 号：TB611[一般工业技术—制冷工程]