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通过搭建实验台,以水和不同浓度的溴化锂溶液为工质针对两级气泡泵的泵起做了大量实验研究和分析。实验研究表明:冷剂蒸汽加热是第二级气泡泵泵起的一个因素,另一个因素是中间溶液降压闪发形成气泡;两级气泡泵的泵起与中间溶液和一级冷剂蒸汽的压力差有关;工质为水时,当一级冷剂蒸汽压力与中间溶液压力之差为3.5-3.9k Pa之间时,两级溶液泵能够运行起来,且启动时间随着浸没高度的增大而减小;工质为溴化锂溶液时,随着溶液浓度的增大,两级气泡泵泵起所需要的压差是增大的,且比以水为工质时压差大。启动时间在溴化锂溶液浓度为45.5%-54%范围内时随着浓度的增大而增大。在浓度为54%-59.5%时,随着浓度的增大而减小,在浓度为54%时气泡泵的启动时间达到最大值。
By setting up a laboratory bench, a large number of experimental studies and analyzes have been done on pumping of two-stage bubble pump with water and different concentrations of lithium bromide solution as working fluid. Experimental studies show that: the refrigerant vapor heating is a second-stage bubble pump pump up a factor, the other factor is that the intermediate solution depressurization flash to form bubbles; two-stage bubble pump pump with the intermediate solution and a refrigerant vapor Pressure difference; when the working fluid is water, when the difference between the pressure of the first-stage refrigerant vapor and the pressure of the intermediate solution is 3.5-3.9kPa, the two-stage solution pump can be operated, and the startup time increases with the immersion height When the working fluid is lithium bromide solution, as the concentration of the solution increases, the pressure difference required for the two-stage bubble pump to pump up is larger, and the pressure difference is larger than that when the working fluid is used as the working fluid. The startup time increases with increasing concentration of lithium bromide solution at a concentration of 45.5% -54%. When the concentration is 54% -59.5%, it decreases with the increasing of the concentration, and the bubble pump reaches the maximum startup time at the concentration of 54%.