不同温比下自由活塞斯特林发电机的数值研究  

Numerical study of a free-piston Stirling generator at different temperature ratios

作　　者：张蓉 闫春杰[1] 罗新奎 屈方杰 孙述泽[1] Zhang Rong;Yan Chunjie;Luo Xinkui;Qu Fangjie;Sun Shuze(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《低温工程》2024年第5期79-86,共8页Cryogenics

基　　金：国家自然科学基金(51976086);真空技术与物理重点实验室基金(6142207210201)。

摘　　要：为提高自由活塞斯特林动力系统的输出功率和热电转换效率,通过Sage软件对斯特林机的关键参数进行模拟研究,探讨关键参数在不同温比下对发电机输出功率和热电转换效率的影响。研究结果表明在不同温比下,相位角分别为80°和50°时对应输出功率和热电转换效率最高,充气压力的增大对输出功率的增大效果显著,但对热电转换效率的影响较小;同温比下,提高冷端温度对输出功率和热电转换效率的影响大于提高热端温度的影响,但当温比为2.5时,冷端温度高于430 K后,热电转换效率反而降低。To boost both the output power and thermoelectric conversion efficiency of the free-piston Stirling power system,based on the key parameters of the Stirling machine are simulated by the Sage software to investigate how key parameters affect the generator’s output power and thermo-electric conversion efficiency across varying temperature ratios.The results show that at different temperature ratios,the phase angle of 80°and 50°corresponds to the highest output power and thermoelectric conversion efficiency,and the increase of inflation pressure has a significant effect on the increase of output power,however,its impact on thermoelectric conversion efficiency is mini-mal;conversely,increasing the cold-end temperature at the same temperature ratio has a greater effect on both output power and thermoelectric conversion efficiency compared to increasing the hot-end temperature,but when the temperature ratio is 2.5,the cold end temperature is higher than 430 K,and the thermoelectric conversion efficiency is higher than that of the cold end temperature,and the temperature of the cold end is higher than 430 K.But when the temperature ratio is 2.5,the cold end temperature is higher than 430 K,the thermoelectric conversion efficiency is reduced.

关 键 词：斯特林发电机 热电转换效率 相位角 充气压力 温比 

分 类 号：TB657[一般工业技术—制冷工程]