Loss Analysis of High Power Stirling-Type Pulse Tube Cryocooler

Cryogenic Engineering Conference 2015

材料科学;物理学

Nakano, K.^1 ; Hiratsuka, Y.^1

Technology Research Center, Sumitomo Heavy Industries, Ltd., 2-1-1, Yato-cho, Nishitokyo-city, Tokyo

188-8585, Japan^1

关键词: Cooling Capacity;    High temperature superconductor (HTS);    High-efficiency;    Loss analysis;    Minimum temperatures;    Numerical calculation;    Stirling type pulse tube cryocooler;    Superconducting magnetic energy storages;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012095/pdf
DOI  :  10.1088/1757-899X/101/1/012095

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

For the purpose of cooling high-temperature superconductor (HTS) devices, such as superconductor motors, superconducting magnetic energy storage (SMES) and current fault limiters, cryocoolers should be compact in size, light-weight, and have high efficiency and reliability. In order to meet the demand of HTS devices world-wide, the cryocooler needs to have COP efficiency >0.1. We have developed a high power Stirling-type pulse tube cryocooler (SPTC) with an in-line expander. The experimental results were reported in June 2012[1]. The cooling capacity was 210 W at 77 K and the minimum temperature was 37 K when the compressor input power was 3.8 kW. Accordingly, the COP was about 0.055. To further improve the efficiency, the energy losses in the cryocooler were analyzed. The experimental results and the numerical calculation results are reported in this paper.