Cycle Design of Reverse Brayton Cryocooler for HTS Cable Cooling Using Exergy Analysis

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

材料科学;物理学

Gupta, Sudeep Kumar^1 ; Ghosh, Parthasarathi^1

Cryogenic Engineering Centre, IIT Kharagpur, India^1

关键词: Circulation systems;    Commercial process simulators;    Critical component;    Cryogenic refrigeration;    Exergy destructions;    Exergy efficiencies;    High temperature superconducting cables;    Sub-cooled liquid nitrogen;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012074/pdf
DOI  :  10.1088/1757-899X/171/1/012074

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The reliability and price of cryogenic refrigeration play an important role in the successful commercialization of High Temperature Superconducting (HTS) cables. For cooling HTS cable, sub-cooled liquid nitrogen (LN2) circulation system is used. One of the options to maintain LN2in its sub-cooled state is by providing refrigeration with the help of Reverse Brayton Cryo-cooler (RBC). The refrigeration requirement is 10 kW for continuously sub-cooling LN2from 72 K to 65 K for cooling 1 km length of HTS cable [1]. In this paper, a parametric evaluation of RBC for sub-cooling LN2has been performed using helium as a process fluid. Exergy approach has been adopted for this analysis. A commercial process simulator, Aspen HYSYS®V8.6 has been used for this purpose. The critical components have been identified and their exergy destruction and exergy efficiency have been obtained for a given heat load condition.