重力铯热管等温性能研究

doi:10.3969/j.issn.1000-1158.2020.01.06

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Abstract To verify the key technology of the development of the cesium heat pipe, the isothermal performance and the start-up characteristics of the gravity cesium heat pipe were studied under a constant temperature condition by measuring the temperature distribution of the outer wall of the heat pipe. Also, the effects of the length of the condensation section on the isothermal performance of the heat pipe were analyzed. The results showed that, the cesium heat pipe can start normally when the temperature of the heating furnace was in the range from 330℃ to 630℃ and had a good heat transfer ability. Moreover, the higher the temperature of the heating furnace, the faster the start-up of the heat pipe. The temperature of the wall surfaces of the heat pipe showed serrated temperature fluctuations when the length of the condensation section is 300mm. The mechanism of boiling phase transition heat transfer was analyzed in the heat pipe from the perspective of superheat. The selection of a suitable length of condensation section can avoid the occurrence of the phenomena of the periodic intermittent boiling. In addition, the experimental results proved that the cesium heat pipe can be used as a high-efficiency heat transfer element within the temperature range from 330℃ to 630℃, and is suitable for realizing the zinc freezing point of the ITS-90.

Key words： metrology cesium heat pipe isothermal performance start-up characteristics superheating ITS-90 zinc freezing point

Received: 30 July 2019 Published: 19 December 2019

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TB942

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	Articles by authors
	ZHANG Kai
	YUE Kai
	YAN Xiao-ke
	TONG Wen-yu

Cite this article:

ZHANG Kai,YUE Kai,YAN Xiao-ke, et al. Study on Isothermal Characteristics of Gravity Cesium Heat Pipe[J]. Acta Metrologica Sinica, 2020, 41(1): 26-31.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.01.06 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I1/26

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