Plate-fin Heat-exchangers for a 10 kW Brayton Cryocooler and a 1 km HTS Cable

Plate-fin heat exchangers (PFHX) are designed and fabricated for a cryogenic cooling system, serving for a 10 kW Brayton cryocooler and a 1 km HTS transmission cable under development in Korea. To achieve compactness and thermal efficiency at the same time, a recuperative HX for Brayton cycle and a...

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Bibliographic Details
Main Authors: Chang, Ho-Myung, Gwak, Kyung Hyun, Jung, Seyong, Yang, Hyung Suk, Hwang, Si-Dole
Format: Conference Proceeding
Language:English
Subjects:
anti-freeaing
Brayton cryocooler
Heat exchanger
plate-fin
superconducing cable
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Summary:Plate-fin heat exchangers (PFHX) are designed and fabricated for a cryogenic cooling system, serving for a 10 kW Brayton cryocooler and a 1 km HTS transmission cable under development in Korea. To achieve compactness and thermal efficiency at the same time, a recuperative HX for Brayton cycle and a sub-cooling HX of liquid nitrogen for HTS cable are designed as integrated parts. A key design feature is focused on the coldest part of sub-cooling HX, where the streams of liquid nitrogen and refrigerant (helium gas) are arranged as two-pass cross-flow so that the risk of freeze-out of liquid nitrogen can be reduced. Details of hardware PFHX design are presented and discussed towards its immediate application to the HTS cable system.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2015.06.038