Abstract The bubble column evaporator (BCE) process is a promising method for seawater desalination with improved evaporation efficiency. In this paper, for the first time, the enthalpy of water vaporization (ΔHv) in a helium sparged aqueous solution was measured and calculated using an energy balance equation for a BCE by applying an improved column design. A significant drop in the measured ΔHv values correlated with the observation of a larger weight loss of water vapor from the salt solution suggest that pre-heated helium inlet gases can facilitate the evaporation process, apparently by disrupting the hydrogen bonding among water molecule clusters, probably in the regions close to the surface of the rising hot bubbles. The increased evaporation efficiency of about 3.1 times with 75 °C heated helium inlet illustrates its potential for future seawater desalination because of its relatively low energy consumption compared with other commercial desalination methods and suggests that solar energy or waste vent gases could be used as suitable sources of thermal energy, and the helium carrier gas can be recycled during the condensation process to reduce the commercial cost.

中文翻译：

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用于海水淡化的鼓泡柱蒸发器中带氦气入口的改进蒸发工艺

摘要 鼓泡塔蒸发器（BCE）工艺是一种很有前途的海水淡化方法，可提高蒸发效率。在本文中，首次通过应用改进的色谱柱设计，使用 BCE 的能量平衡方程测量和计算了氦气喷射水溶液中的水汽化焓 (ΔHv)。测量的 ΔHv 值的显着下降与观察到盐溶液中水蒸气的更大重量损失相关，这表明预热的氦气入口气体可以促进蒸发过程，显然是通过破坏水分子簇之间的氢键，可能在靠近上升的热气泡表面的区域。蒸发效率提高约3。