Startup and heat transfer performance of medium temperature cesium heat pipe

doi:10.16085/j.issn.1000-6613.2020-2293

Abstract

Abstract:

Due to active chemical properties and a high price of cesium, few studies on medium temperature cesium heat pipe were reported, while most researches were focus on sodium, potassium and Na-K alloy heat pipes. To meet the demands of applications at medium temperature and a systematic academic research, a medium temperature cesium heat pipe was fabricated and experimentally tested in this paper. Heat fluxes were modulated by a high frequency heater and the temperature revolutions of heat pipe wall along the pipe length were monitored by a data acquisition system. The results showed that the start-up performance of the cesium heat pipe was similar to that of a sodium heat pipe, and the transition temperature of a cesium heat pipe could be accurately calculated with Kn=0.01. When heat flux q was 18.04W/cm², the temperature distribution along the heat pipe indicated that the cesium heat pipe entered the start-up state with a sonic limit, and a temperature difference between adiabatic and evaporation sections reached 30.00℃. Increasing heating flux to 69.10W/cm², the working temperature of heat pipe could reach 600.00℃ with the maximum temperature difference between the evaporation section and the adiabatic section less than 7.00℃. Furthermore, the effective length of this cesium heat pipe was 100% which showed an excellent heat transfer performance and temperature uniformity.

Key words: cesium heat pipe, heat transfer, two phase flow, startup performance, temperature uniformity

摘要：

由于铯化学性质活泼、易发生爆炸且价格昂贵，目前对中温铯热管的研究少见报道，而以高温钠、钾及钠钾合金热管的研究为主。鉴于中温热管应用及系统学术研究的需求，本文制备了铯热管，采用高频加热器调控其热流密度、数据采集系统监测管壁沿程的温度变化，对其启动性能及传热性能展开研究。实验结果表明，铯热管的启动演变规律与钠热管类似，利用Kn=0.01计算其转折温度更为准确。当热流密度q=18.04W/cm²时，通过热管沿程温度分布可知热管实现了声速极限下的启动，绝热段温度与蒸发段温度相差30.00℃。热流密度q=69.10W/cm²时，工作温度可达600.00℃，蒸发段与绝热段最大温差小于7.00℃，且有效长度为100％，表现出优异的换热性能和均温性。

关键词: 铯热管, 传热, 两相流, 启动性能, 均温性

CLC Number:

TK172.4

GUO Yuxiang, CHEN Hongxia, YUAN Dazhong, LI Linhan, WANG Yiran, JI Yang. Startup and heat transfer performance of medium temperature cesium heat pipe[J]. Chemical Industry and Engineering Progress, 2021, 40(11): 5981-5987.

郭宇翔, 陈宏霞, 袁达忠, 李林涵, 王逸然, 纪阳. 中温铯热管的启动及传热性能[J]. 化工进展, 2021, 40(11): 5981-5987.

Figures/Tables 8

References 29

1	FAGHRI A. Review and advances in heat pipe science and technology[J]. Journal of Heat Transfer, 2012, 134(12): 123001.
2	KIHM K, KIRCHOFF E, GOLDEN M, et al. Neutron imaging of alkali metal heat pipes[J]. Physics Procedia, 2013, 43: 323-330.
3	VASILIEV L L. Heat pipes in modern heat exchangers[J]. Applied Thermal Engineering, 2005, 25(1): 1-19.
4	WANG X Y, ZHU Y Z, WANG Y F. Development of pressure-based phase change model for CFD modelling of heat pipes[J]. International Journal of Heat and Mass Transfer, 2019, 145: 118763.
5	焦永刚, 夏国栋, 周明正, 等. 基于“平面前锋”启动模型的计量用钠热管启动特性[J]. 化工学报, 2012, 63(3): 781-787.
	JIAO Yonggang, XIA Guodong, ZHOU Mingzheng, et al. Starting characteristics of sodium heat pipe in metrology based on “flat-front” startup model[J]. CIESC Journal, 2012, 63(3): 781-787.
6	ZHANG H, ZHUANG J. Research, development and industrial application of heat pipe technology in China[J]. Applied Thermal Engineering, 2003, 23(9): 1067-1083.
7	LAUBSCHER R, DOBSON R T. Theoretical and experimental modelling of a heat pipe heat exchanger for high temperature nuclear reactor technology[J]. Applied Thermal Engineering, 2013, 61(2): 259-267.
8	BAI T, ZHANG H, XU H. Application of high temperature heat pipe in hypersonic vehicles thermal protection[J]. Journal of Central South University of Technology, 2011, 18(4): 1278-1284.
9	ZENG H Y, WANG Y Q, SHI Y X, et al. Highly thermal integrated heat pipe-solid oxide fuel cell[J]. Applied Energy, 2018, 216: 613-619.
10	赵洁, 袁达忠, 唐大伟. 径向高温热管中段加热传热特性实验研究[J]. 工程热物理学报, 2019, 40(3): 672-677.
	ZHAO Jie, YUAN Dazhong, TANG Dawei. Heat transfer characteristics of the middle position heated annular high temperature heat pipes[J]. Journal of Engineering Thermophysics, 2019, 40(3): 672-677.
11	MAKHANKOV A, ANISIMOV A, ARAKELOV A, et al. Liquid metal heat pipes for fusion application[J]. Fusion Engineering and Design, 1998, 42(1/2/3/4): 373-379.
12	捷曼尔M G, 胡亚才, 冯踏青, 等. 钠钾合金高温热管性能试验研究[J]. 浙江大学学报(工学版), 1999, 33(4): 414-417.
	GAMAL M G, HU Yacai, FENG Taqing, et al. Analysis on the properties of NaK alloy high temperature heat pipe and its experimental study[J]. Journal of Zhejiang University (Engineering Science), 1999, 33(4): 414-417.
13	ZENG M, MA T, SUNDÉN B, et al. Effect of lateral fin profiles on stress performance of internally finned tubes in a high temperature heat exchanger[J]. Applied Thermal Engineering, 2013, 50(1): 886-895.
14	沈妍, 张红, 许辉, 等. 三角沟槽高温热管变热流传热特性[J]. 化工学报, 2014, 65(10): 3829-3837.
	SHEN Yan, ZHANG Hong, XU Hui, et al. Heat transfer characteristics of high temperature heat pipe with triangular grooved wick under variable heat fluxes[J]. CIESC Journal, 2014, 65(10): 3829-3837.
15	KEMME J E. Ultimate heat-pipe performance[J]. IEEE Transactions on Electron Devices, 1969, 16(8): 717-723.
16	DOBRAN F. Suppression of the sonic heat transfer limit in high-temperature heat pipes[J]. Journal of Heat Transfer, 1989, 111(3): 605-610.
17	WANG C L, LIU L M, LIU M H, et al. Conceptual design and analysis of heat pipe cooled silo cooling system for the transportable fluoride-salt-cooled high-temperature reactor[J]. Annals of Nuclear Energy, 2017, 109: 458-468.
18	WANG C L, LIU X, LIU M H, et al. Experimental study on heat transfer limit of high temperature potassium heat pipe for advanced reactors[J]. Annals of Nuclear Energy, 2021, 151: 107935.
19	CAO Y, FAGHRI A. A numerical analysis of high-temperature heat pipe startup from the frozen state[J]. Journal of Heat Transfer, 1993, 115(1): 247-254.
20	CAO Y, FAGHRI A. Closed-form analytical solutions of high-temperature heat pipe startup and frozen startup limitation[J]. Journal of Heat Transfer, 1992, 114(4): 1028-1035.
21	TOURNIER J M, EL-GENK M S. A vapor flow model for analysis of liquid-metal heat pipe startup from a frozen state[J]. International Journal of Heat and Mass Transfer, 1996, 39(18): 3767-3780.
22	MA M Y, LIANG W F, WANG S M, et al. A pure-conduction transient model for heat pipes via derivation of a pseudo wick thermal conductivity[J]. International Journal of Heat and Mass Transfer, 2020, 149: 119122.
23	TENG W F, WANG X Y, ZHU Y Z. Experimental investigations on start-up and thermal performance of sodium heat pipe under swing conditions[J]. International Journal of Heat and Mass Transfer, 2020, 152: 119505.
24	ZHAO J, YUAN D Z, TANG D W, et al. Heat transfer characteristics of a concentric annular high temperature heat pipe under anti-gravity conditions[J]. Applied Thermal Engineering, 2019, 148: 817-824.
25	WANG C L, GUO Z P, ZHANG D L, et al. Transient behavior of the sodium-potassium alloy heat pipe in passive residual heat removal system of molten salt reactor[J]. Progress in Nuclear Energy, 2013, 68: 142-152.
26	张凯, 乐恺, 闫小克, 等. 重力铯热管等温性能研究[J]. 计量学报, 2020, 41(1): 26-31.
	ZHANG Kai, YUE Kai, YAN Xiaoke, et al. Study on isothermal characteristics of gravity cesium heat pipe[J]. Acta Metrologica Sinica, 2020, 41(1): 26-31.
27	JUNG E G, BOO J H. Thermal numerical model of a high temperature heat pipe heat exchanger under radiation[J]. Applied Energy, 2014, 135: 586-596.
28	NARENDRA BABU N, KAMATH H C. Materials used in heat pipe[J]. Materials Today: Proceedings, 2015, 2(4/5): 1469-1478.
29	钱增源. 低熔点金属的热物性[M]. 北京: 科学出版社, 1985: 180.
	QIAN Zengyuan. Thermal properties of low melting point metals[M]. Beijing: Science Press, 1985: 180.

高频加热器读数	轴向热流密度/W·cm^-2
170	0.68
185	18.04
213	44.55
240	59.92
255	64.25
265	66.78
280	69.10
291	67.37

高频加热器读数	轴向热流密度/W·cm^-2
170	0.68
185	18.04
213	44.55
240	59.92
255	64.25
265	66.78
280	69.10
291	67.37

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