Capacity enhancement of indigenous expansion engine based helium liquefier

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Doohan, R.S.^1 ; Kush, P.K.^1 ; Maheshwari, G.^2

Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, India^1

Institute of Engineering and Technology, DAVV, Madhya Pradesh, Indore, India^2

关键词: Capacity enhancement;    Continuous improvements;    Design improvements;    Experimental validations;    Helium temperatures;    Performance simulation;    Plate-fin heat exchanger;    Refrigeration capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012011/pdf
DOI  :  10.1088/1757-899X/171/1/012011

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Development of technology and understanding for large capacity helium refrigeration and liquefaction at helium temperature is indispensable for coming-up projects. A new version of helium liquefier designed and built to provide approximately 35 liters of liquid helium per hour. The refrigeration capacity of this reciprocating type expansion engine machine has been increased from its predecessor version with continuous improvement and deficiency debugging. The helium liquefier has been built using components by local industries including cryogenic Aluminum plate fin heat exchangers. Two compressors with nearly identical capacity have been deployed for the operation of system. Together they consume about 110 kW of electric power. The system employs liquid Nitrogen precooling to enhance liquid Helium yield. This paper describes details of the cryogenic expander design improvements, reconfiguration of heat exchangers, performance simulation and their experimental validation.