Temperature distribution of LiCl droplets in vacuum flash evaporation

Document Type

Article

Publication Date

1-1-2014

Abstract

The variations in temperature distribution of LiCl droplet, as a typical dehumidification solution, in vacuum flash-evaporation were theoretically modeled, empirically approximated, and experimentally analyzed to improve its recycling efficiency. The influence of the major factors, such as the size and initial temperature of droplet, pressure, and heat radiation, on flash evaporation was evaluated. The experimental results show that the temperatures, at the center and on the surfaces of a droplet, were almost identical except some random fluctuation, under typical evaporation conditions; and that the flash-evaporation rate significantly depends on a decrease of the pressure. The heat radiation was found to have a major impact on theheat transfer and evaporation rate. We suggest that the droplet's flash evaporation model be valid only in adiabatic flash evaporation.

Publication Title

Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology

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