摘要
以钠钾合金(NaK-55)为工质进行实验,分别在800、1 000、1 200、1 400、1 600W的加热功率条件下对钠钾合金热管的启动和传热性能进行研究。实验结果表明:在800~1 600W加热功率范围内,在冷却水冷却条件下,该钠钾合金热管可以完全启动并进入稳定工作状态。随着加热功率的提高,热管外壁面温度整体略有增加,冷凝段启动时间缩短,钠钾合金热管的当量传热系数、蒸发区表面传热系数、冷凝区表面传热系数随加热功率的提高成线性增加。
A sodium-potassium ally(45-wt.%-Na and 55-wt.%-K)heat pipe was experimentally tested to investigate the effect of heating powers(800,1 000,1 200,1 400,and1 600 W)on start-up and heat transfer performances.The results showed that under the tested operation conditions,the sodium-potassium ally heat pipe presented an optimal start-up performance with the heating power.Within the range of 800-1600 Wof heating power,the heat pipe could achieve a dynamic equilibrium state of heat transfer as the heat was carried away by cooling water in time,and the heat transfer coefficient of the sodium-potassium ally heat pipe,convective heat transfer coefficients of evaporator and condenser sections almostlinearly increased with the heating power.
引文
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