沿程加热虹吸泵提升性能的试验研究

Experimental Study on the Performance for Along-heating Thermosyphon

搭建了带沿程加热虹吸泵的试验装置,其中提升管长1000 mm,提升管径为10 mm。以水为工质,加热功率为500~800 W,沉浸比为0.6~0.8,系统初始压力为10~101 k Pa,入口过冷度为25~40℃,研究了在这些工况下热虹吸泵的性能。结果表明,液体提升量和提升效率均随着加热功率的增加而增加,且当加热功率大于700 W时,提升量的增加速率下降;沉浸比越大,热虹吸泵的提升性能越好;入口过冷度越小,液体提升量越大,但提升效率越低;液体提升量与提升效率均与系统的初始压力呈负相关。

An experimental platform with along-heating thermosyphon was set up,which tube long 1000 mm and diameter 10 mm. The performance of thermosyphon under the condition was studied with water as the working fluid,heating power 500 ~ 800 W,immersion ratio 0. 6 to 0. 8,the system initial pressure 10 ~ 101 k Pa,inlet undercooling 25 ~ 40 ℃. With the increase of heating power,the flow rate of the pump water and the efficiency of the thermosyphon increase,and when the heating power is greater than 700 W,the flow rate of the pump water decreases; With the Immersion ratio increase,the flow rate of the pump water and the efficiency of the thermosyphon increase; With the initial pressure of the system increase,the flow rate of the pump water and the efficiency of the thermosyphon decrease; With inlet undercooling increase,the flow rate of the pump water increase,but the efficiency of the thermosyphon is decrease.