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 kWli for water temperature and average solar intensity 45.42 °C and 420.855 W/m~2 and exergy efficiency varies from 0.928% to 5.363%.
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机译：太阳仍然是可用于将可用水转换为清洁水的过程。要了解蒸发过程中是否已经在质量方面使用的漏洞是最佳的，但第二次热力学法使用或称为漏洞分析。 本研究的目的是确定双坡被动太阳太阳能太阳能太阳能效率的低度和高度效率。结果表明，太阳能，水温和环境温度影响了越来越高的效率的程度。太阳能越高越高 和水的温度，越高的漏洞和效率越高，环境温度越高，系统中蒸发的漏洞将较低。每日排放量从0.021千瓦时变化到水温和平均太阳能32.26° C和97.9 W / M2至M2至0.525 kWli用于水温和平均太阳能强度45.42°C和420.855 W / m〜2，高度效率从0.928％变化至5.363％。
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