期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 134, 期 -, 页码 970-983出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2018.12.180
关键词
Molten salt; Flibe; Flow loop; Natural circulation; Heat transfer
资金
- U.S. Department of Energy through a Nuclear Energy University Program grant [DE-NE0008285]
- US Nuclear Regulatory Commission Graduate Student Fellowship program [NRC-HQ-84-15-G-0040]
A new large natural circulation FLiBe loop has operated for the first time in 40 years. Reaching temperatures above 700 degrees C with stable flow rates around 5 cm/s, the loop exhibits a range of flow phenomena pertinent to high temperature natural circulation safety systems for nuclear reactors. This paper discusses the system and several operating conditions spanning a wide range of behavior to aid the development of other systems, simulation benchmarks, or system-codes. Analysis of heat transport phenomena indicates that standard Nusselt number correlations apply to a first approximation. More accurate salt-freezing models may be necessary for air-cooled salt-systems due to the insulating affect of the low thermal-conductivity frozen salt layer on the cold pipe walls. (C) 2019 Elsevier Ltd. All rights reserved.
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