摘要
提出了一种热声驱动的气-液双作用行波热声制冷机,对其性能进行了数值模拟分析。计算结果表明,在平均工作压力3.0 MPa,发动机定壁温加热温度440℃工况下,系统谐振频率为12.76 Hz,在-20℃制冷温度以及环境温度为27℃的情况下获得0.708 kW制冷量,整机的制冷系数(制冷量除以加热量)为0.512。在350℃、440℃以及550℃定壁温加热下,系统能够达到的最低制冷温度分别为-62.3℃、-68.3℃以及-70.8℃。系统整机相对卡诺效率在制冷温度变化范围内存在最大值。较低的发动机加热温度更有利于系统的热声转换,当发动机加热温度为350℃时,系统在-45℃制冷温度下达到25.30%最大相对卡诺效率。
A thermoacoustically-driven double-acting traveling wave thermoacoustie refrigerator with liquid piston was proposed and analyzed. At the operating point with 3.0 MPa mean working pressure and 440 ℃ heating temperature, the resonant frequency was 12.76 Hz and the refrigerator provide 0. 708 kW cooling power at - 20 ℃ cooling temperature and 27 ℃ surrounding temperature. The COP of whole system was 0. 512. Under different heating temperature with 350 ℃ , 440 ℃ and 550 ℃ , the system could provide the lowest cooling temperatures of -62.3 ℃ , -68.3 ℃ and -70.8 ℃. There was a maximum value of relative Carnot efficiency when the cooling temperature changed. Lower heating temperature was more suit- able to this system. The highest relative Carnot efficiency of 25.30% at - 47 ℃ was achieved when the heating temperature was 350 ℃.
出处
《低温工程》
CAS
CSCD
北大核心
2012年第6期5-9,45,共6页
Cryogenics
基金
国家自然科学基金重大项目(No.50890181)
国家科技部973项目(No.2010CB227303)支持
关键词
热声驱动
双作用
行波热声制冷机
液体活塞
thermoacoustically-driven
double-acting
thermoacoustic refrigerator
liquid piston
