| 摘要: |
| 热声驱动脉管制冷机通常采用直接或者长管耦合的方式，但是因为耦合后的发动机和制冷机难以达到最佳的工作状态，耦合长管的损失也比较大，因此整体效率较低。本文提出一种热声驱动脉管制冷机结构，利用谐振子耦合热声发动机和脉管制冷机，能够显著减小声功传递损失，提升整机?效率。全文针对在900 K加热温度、80 K空气液化温区下的热声驱动脉管制冷机展开理论研究，首先分析了谐振子耦合机理，并对谐振子参数进行了优化设计；然后，研究了加热温度、制冷温度和机械阻尼对系统性能影响；最后，将谐振子耦合型与长管耦合型两种方式的热声驱动制冷机进行了对比分析。研究结果表明：在平均压力为3 MPa，加热温度为900 K，制冷温度为80 K时，谐振子耦合的热声驱动制冷机可获得整机22.5 %的?效率，而长管耦合的热声驱动脉管制冷机获得11.6%的?效率 |
| 关键词: 热声 脉管制冷机 谐振子 |
| DOI： |
| Received:March 03, 2017 |
| 基金项目:国家自然科学基金 (No.51576204)和国家重点研发计划(No.2016YFB0901403)资助项目。 |
|
| Study on Coupling in a Thermoacoustic Driven Pulse Tube Refrigerator |
|
Hu Jiangfeng1, Hu Jianying2, Xu Jingyuan1, Wang Wei1, Luo Ercang2
|
| (1.Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences，The University of Chinese Academy of Sciences;2.Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences) |
| Abstract: |
| Thermoacoustic-driven pulse tube refrigerators are usually coupled directly or by long tubes called acoustic amplifiers. With these coupling methods, the efficiency of the whole system is quite low because of the nonideal acoustic field and flow losses. This paper describes a new thermoacoustic-driven pulse tube refrigerator that can reduce the transmission loss of sound power and improve efficiency using a mechanical resonator to couple the thermoacoustic engine and pulse tube refrigerator. Theoretical analysis is carried out for a heating temperature of 900 K and cooling temperature of 80 K. First, the coupling mechanism of the resonator is analyzed and the parameters of the mechanical resonator are optimized. Second, the influence of the heating temperature, cooling temperature, and mechanical resistance are investigated. Furthermore, the proposed method is compared with the traditional coupling configuration. The results show that the thermoacoustic-driven refrigerator with mechanical resonance attains an exergy efficiency of 22.5%, whereas the long-tube-coupled thermoacoustic-driven pulse tube refrigerator only reaches an exergy efficiency of 11.6%. |
| Key words: thermoacoustic pulse tube refrigerator mechanical resonator |
