修改变温热源热声发动机驱动制冷机性能  

Characteristic of thermoacoustic engine drive refrigerator with variable temperature heat sources

作　　者：喻绍飞 罗二仓[1,2] 张丽敏 吴张华[1] 胡剑英[1,2] Yu Shaofei;Luo Ercang;Zhang Liming;Wu Zhanghua;Hu Jianying(Chinese Academy of Science,Key Laboratory of Cryogenic,Technical Institute of Physicsand Chemistry,Beijing 100190,China;University of Chinese Academy Science,Beijing 100049,China)

机构地区：[1]中国科学院低温工程学重点实验室(理化技术研究所),北京100190 [2]中国科学院大学,北京100049

出　　处：《低温工程》2020年第1期1-7,35,共8页Cryogenics

基　　金：国家重点研发计划(2016YFB0901403);北京市自然科学基金重点项目(3181002)。

摘　　要：为提高环路多级行波热声发动机驱动制冷机系统在变温热源条件下的热功转换性能,使用SAGE软件对不同加热温度的子系统进行解耦计算,分析了热源温度、回热器和谐振管结构尺寸等影响因素,然后根据计算结果对整机系统进行了结构优化。结果表明:优化后整机系统内部声场行波比例上升、部分谐振管中获得了更大声阻抗幅值,但谐振管尺寸的增加增大了声功损失面积;在整机吸热量和谐振管中声功损失量都增加的情形下,整机热声转换效率和相对卡诺效率略微下降,负载制冷机获得了更多声功。In order to improve the thermoacoustic conversion characteristic of the looped multistage traveling-wave thermoacoustic engine drive refrigerator system with variable temperature heat sources condition,firstly,the SAGE software were used to decouple the subsystem with different heat sources,analyze the influence factor include the heat source temperature and the dimensions of the regenerator and resonator tube.Then the structure of the whole system was optimized according to the calculated results.The results show that the optimized system has a higher level of traveling-wave,and the impedance amplitude in some resonator tube increases,meanwhile the increase of the size of the resonator tube increases the acoustic power loss area.In the case where the heat absorption of the whole machine and the acoustic power loss in the resonant tube both increase,the thermoacoustic conversion efficiency and relative Carnot efficiency decreased slightly,and refrigerators get more acoustic power.

关 键 词：热声发动机 制冷机 温度 结构尺寸 阻抗 

分 类 号：TB651[一般工业技术—制冷工程]