0 引言
1 实验系统
1.1 实验装置和步骤
Fig. 1 Schematic diagram of the ultra-long gravity heat pipe experimental system图1 超长重力热管实验系统示意图 |
Fig. 2 Surface tension test system using hanging drop method图2 悬滴法表面张力测试实验系统 |
1.2 误差分析
2 实验结果及分析
2.1 以纯水为工质的超长热管采热性能
Fig. 3 Heat outflow and heat outflow rate of ultra-long heat pipe at different fill height with water as working fluid图3 纯水工质条件下超长重力热管在不同注液量的采热量和采热率 |
2.2 热管工作时的散热分析
Fig. 4 The heat dissipation of the heat pipe图4 热管散热计算示意图 |
Fig. 5 Heat balance analysis of the heat pipe with H2O as working fluid at the case of FH = 6 m图5 注液量为6 m时,以H2O为工质的热平衡分析 |
2.3 以SDS水溶液为工质的超长热管采热性能
Fig. 6 Vapor-liquid surface tension of SDS solutions with different concentrations at 23℃图6 23℃下不同浓度的SDS溶液的气液表面张力 |
Fig. 7 Heat outflow of heat pipes using SDS solution of different concentrations as working fluid: (a) 250 mg/L; (b) 1 000 mg/L; (c) 2 000 mg/L图7 以不同浓度的SDS溶液为工质的热管采热量:(a)250 mg/L;(b)1 000 mg/L;(c)2 000 mg/L |
Fig. 8 Heat outflow of heat pipes at different fill height: (a) FH = 2 m; (b) FH = 4 m; (c) FH = 6 m图8 不同注液高度的热管采热量:(a)FH = 2 m;(b)FH = 4 m;(c)FH = 6 m |
2.4 SDS溶液对采热性能影响的分析
Fig. 9 The temperature fluctuations when the SDS aqueous solution of different concentrations is used as working fluid at 2 m fill height and 500 W heating power: (a) H2O; (b) 250 mg/L; (c) 1 000 mg/L; (d) 2 000 mg/L图9 注液量为2 m、加热量为500 W工况下,不同浓度的SDS水溶液为工质时的温度波动:(a)H2O;(b)250 mg/L;(c)1 000 mg/L;(d)2 000 mg/L |
Fig. 10 The temperature fluctuations when the SDS aqueous solution of different concentrations is used as working fluid at 6 m fill height and 500 W heating power: (a) H2O; (b) 250 mg/L; (c) 1 000 mg/L; (d) 2 000 mg/L图10 注液量为6 m、加热量为500 W工况下,不同浓度的SDS水溶液为工质时的温度波动:(a)H2O;(b)250 mg/L;(c) 1 000 mg/L;(d)2 000 mg/L |