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为了进一步提高能源利用效率和实现其空冷化,在双效溴化锂吸收式制冷系统中利用两级气泡泵代替溴化锂吸收制冷系统中传统的机械溶液泵。本文重点对两级溴化锂气泡泵的泵起时间及其影响因素做相关的实验研究,并得出以下的主要研究结果:1)对于不同的管径,两级气泡泵的泵起时间随着加热功率、浸没高度、工质浓度的变化趋势是基本一致的;2)加热功率越大越有利于气泡泵的泵起;3)随着浸没高度的增大气泡泵的泵起时间逐渐减小;4)工质浓度的增大也会使气泡泵的泵起时间增大,但当溴化锂溶液浓度大于54%后影响不明显;5)一级气泡泵的气液成分及中间溶液的闪发一定程度上影响两级气泡泵的泵起时间,因而造成局部区域与上述规律的偏离。
In order to further improve the energy utilization efficiency and achieve its air-cooling, a two-stage bubble pump is used instead of the conventional mechanical solution pump in the lithium bromide absorption refrigeration system in a two-way lithium bromide absorption refrigeration system. This paper focuses on the two-stage lithium bromide bubble pump pump start-up time and its influencing factors related to the experimental study, and draw the following main findings: 1) for different diameter, two pump stage pump start-up time with heating The change trend of power, immersion height and working fluid concentration are basically the same; 2) the larger the heating power is, the more favorable the pump start-up; 3) the pump start-up time decreases with the increase of immersion height; 4 ) The increase of working fluid concentration also increases the pumping time of the bubble pump, but the effect is not obvious when the concentration of lithium bromide solution is more than 54%. 5) The gas-liquid composition of the bubble pump and the flash of the intermediate solution are somewhat Affect the two-stage bubble pump pump start-up time, resulting in the deviations of the local area and the above rules.