Cross-flow heat exchangers for anti-freezing of liquid nitrogen
| Autor: | Si-Dole Hwang, Ho-Myung Chang, Hyung Suk Yang, Kyung Hyun Gwak |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Liquid nitrogen vehicle Plate heat exchanger General Physics and Astronomy Thermodynamics Liquid nitrogen Physics::Fluid Dynamics NTU method Cryogenic nitrogen plant Micro heat exchanger General Materials Science Plate fin heat exchanger Composite material Copper in heat exchangers |
| Zdroj: | Cryogenics. 57:122-128 |
| ISSN: | 0011-2275 |
| DOI: | 10.1016/j.cryogenics.2013.06.003 |
| Popis: | Cross-flow heat exchangers are proposed and experimentally investigated as an anti-freezing scheme of liquid nitrogen. The possibility of freeze-out of liquid nitrogen is an important design issue in developing long superconducting cables, as the supply temperature of liquid nitrogen is close to its freezing temperature (63.3 K). Plate-fin heat exchangers are fabricated as typical counter-flow and newly proposed two-pass cross-flow in laboratory scale, and tested with cold helium gas at temperatures below 60 K. The experimental results show that the cross-flow heat exchanger is less vulnerable to the freeze-out condition, since the temperature distribution is basically two-dimensional. The cross-flow heat exchangers are effective in avoiding a complete clog-up of all passages and reducing the risk of freeze-out of liquid nitrogen. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect