Flash evaporation method for improved desalination and cooling applications: An experimental study

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2023-08-25 DOI:10.1016/j.desal.2023.116933

Sarvjeet Singh, Prodyut R. Chakraborty, Hardik B. Kothadia

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引用次数: 1

Abstract

The present study involves the experimental analysis of flash evaporation when sudden depressurization is created into a vertical cylindrical tube having a water volume range of 120 to 180 ml. During experiments, low water pool volumes are used to prevent the impact of gravity on the change of saturation temperature. The investigation is carried out by varying the initial water temperature and back pressure of the vacuum tank in the range of 65 to 80 $^{\circ}$ C and 11.32 to 41.32 kPa, respectively. It is observed that the evaporation rate and cooling rate are both enhanced by increasing the initial pool temperature and decreased by increasing the back pressure. It is reported that the evaporation rate is improved by 29.7 % with an increase in initial water temperature of 5 $^{\circ}$ C and decreases by 152 % with an increase in the back pressure of 10 kPa. It is also found that the cooling rate is improved by 21.6 % with an increase in initial water temperature of 5 $^{\circ}$ C and decreased by 59.2 % with an increase of water volume of 30 ml. It is clear from the visualization procedure that the degree of superheat plays a vital role in flash evaporation.

Abstract Image

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用于改进脱盐和冷却应用的闪蒸法：实验研究

本研究在容积为120 ~ 180ml的垂直圆柱形管中进行突然降压时的闪蒸实验分析。实验中采用小水池容积来防止重力对饱和温度变化的影响。通过改变真空水箱的初始水温和背压，分别在65 ~ 80°C和11.32 ~ 41.32 kPa范围内进行调查。结果表明，提高初始池温度有利于提高蒸发速率和冷却速率，增加背压有利于降低蒸发速率和冷却速率。据报道，当初始水温为5°C时，蒸发速率提高29.7%，当背压为10 kPa时，蒸发速率降低152%。我们还发现，当初始水温为5°C时，冷却速度提高了21.6%，当水量为30 ml时，冷却速度下降了59.2%。从可视化程序可以清楚地看出，过热度在闪蒸过程中起着至关重要的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.