Gaslift pump making use of phase change of working fluid
Gaslift pump making use of phase change of working fluid
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DOI：
10.1016/j.applthermaleng.2016.05.010
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发表时间：
2016-06
影响因子：
6.4
通讯作者：
S. Hosokawa;Shu Fujimoto;A. Tomiyama
中科院分区：
文献类型：
--
作者：
S. Hosokawa;Shu Fujimoto;A. Tomiyama
为了经济地提升海底资源，需要提高气举泵的效率。提出了一种利用工质相变来避免空气压缩，提高效率的气举泵。沸点比周围温度低的工作流体作为液体通过绝热管供给到立管底部附近的蒸发器。工作流体由于周围液体的加热而在蒸发器处沸腾。生成的气体代替压缩空气注入立管，形成气液两相流，水从立管底部开口抽出。工作流体在管的顶部与所抽取的水分离，并且它流入冷却器以将冷凝的液体再次供应到绝热管中。该泵仅需要能量来冷却工作流体，即不需要能量来压缩气体。通过以氢氟碳化合物为工质的气升泵样机实验，证实了该泵的可行性。并对取水流量进行了预测。
Improvement of efficiency of a gaslift pump is required for lifting submarine resources economically. We propose a gaslift pump utilizing phase change of working fluid to improve the efficiency by avoiding air compression. A working fluid, which has a boiling point lower than surrounding temperature, is supplied as liquid to an evaporator near the bottom of a riser pipe through an adiabatic pipe. The working fluid boils at the evaporator due to heating from the surrounding liquid. The generated gas is injected into the riser pipe instead of compressed air and forms gas–liquid two-phase flow, by which the water is drawn from the bottom opening of the riser pipe. The working fluid is separated from the drawn water at the top of the pipe, and it flows into a cooler to supply the condensed liquid into the adiabatic pipe again. This pump needs the energy only to cool the working fluid, i.e. no energy is required for compressing gas. The feasibility of the pump is confirmed through the experiments using a prototype gaslift pump using a hydro-fluorocarbon as the working fluid. Prediction of the flow rate of drawn water is also carried out.