40K温区的热驱动低温热声制冷机  

A 41 K HEAT-DRIVEN THERMOACOUSTIC COOLER

作　　者：胡剑英[1] 戴巍[1] 罗二仓[1] 

机构地区：[1]中国科学院理化技术研究所

出　　处：《工程热物理学报》2006年第2期189-192,共4页Journal of Engineering Thermophysics

基　　金：中科院知识创新工程重要方向性项目资助(No.KJCX2-SW-W12-1)

摘　　要：热声驱动脉管制冷机主要由热声发动机和脉管制冷机组成,是一种完全无运动部件的新型低温制冷机。本文在实验室现有行波热声发动机的基础上,运用线性热声理论对两级脉管制冷机进行了设计,并用声学放大器对热声发动机和脉管制冷机进行耦合,提高脉管制冷机的驱动压比,从而获得了41 K的低温,这是目前热声驱动脉管制冷机所获得的最低制冷温度。正因为本热声驱动脉管制冷机系统的热驱动特性及其主要部件都是按照热声理论进行设计,所以我们将其称为热驱动低温热声制冷机。Heat-driven thermoacoustic cooler is a new kind of cryocooler with no moving parts. It is mainly consisted of a thermoacoustic engine and a pulse tube cooler. In this paper, a two-stage pulse tube cooler was optimized based on linear thermoacoustic theory and coupled with a traveling-wave thermoacoustic engine. In order to improve the driven pressure ratio of the pulse tube cooler, an acoustic amplifier was employed to couple the engine and the cooler. At last, a temperature of 41 K was obtained. This also is the lowest temperature obtained by heat-driven thermoacoustic cooler ever reported.

关 键 词：低温热声制冷机 线性热声理论 声学放大器 

分 类 号：TB618[一般工业技术—制冷工程]