Exergy analysis of double slope passive solar still

Abstract

Solar still is processes that can be used to convert available water into clean water. To find out whether the exergy used in the evaporation process has been used optimally in terms of quality, the second law of thermodynamics is used or known as exergy analysis. The purpose of this study was to determine the magnitude of exergy and exergy efficiency of a double slope passive solar still. The results showed that the solar intensity, water temperature, and ambient temperature affected the magnitude of exergy and exergy efficiency. The higher the solar intensity and the temperature of the water, the higher exergy and efficiency of the exergy, and the higher the ambient temperature, the exergy of evaporation in the system will be lower. The daily exergy varies from 0.021 kWh to water temperature and average solar intensity 32.26 °C and 97.9 W/m2 to 0.525 kWh for water temperature and average solar intensity 45.42 °C and 420.855 W/m2 and exergy efficiency varies from 0.928% to 5.363%.

Enhancing Water Purification in Solar Stills Through Incorporation of Renewable Energy Technology: An Experimental Study on the Efficiency and Cooling Mechanisms - A Review

“…0.928%-5.363% exergy efficiency. Efficiency is affected by solar radiation, evaporation coefficient, water's temperature, and ambient temperature [19]. Study of energy and also the exergy efficacy of the double slope's passive solar distiller for water desalination.…”

Thermal Energy Analysis of Desalination Double Slope Passive Solar Still

“…People who live on peatlands or in areas that have water scarcity really need clean water sources to meet their daily needs. In Indonesia, when the dry season arrives, many areas lack clean water and they are even willing to queue long and spend some money to get clean water [1]. The problem of lack of clean water can be overcome if people have new ways to produce their own clean water.…”

“…Desalination of solar energy has long been used, which is about two thousand years ago and on a large scale in 1874 to meet water needs in the second world war [8]. In the future, solar-powered desalination systems will be widely used and developed throughout the world, especially in desert areas, coastal areas and peatland areas to produce water [1,9]. The amount of thermal energy produced by solar desalination devices has been studied before, including research conducted by Lovedeep Sahota and G.N.…”

Energy and Exergy Efficiency of Double Slope Passive Solar Still

“…The need for clean water in Indonesia is increasing every year. The average water requirement for each human being is 125 to 150 liters per day to meet needs, such as washing, cooking, bathing, and others [1].…”