Techniques used to reduce back wall losses of solar stills - A review

Younes, Mohamed; Alawee, Wissam H.; Abdullah, A.S.; Omara, Zakaria; Essa, Fadl A.

doi:10.21608/jctae.2022.158802.1008

Techniques used to reduce back wall losses of solar stills - A review

Document Type : Original Article

Authors

¹ Mechanical Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh 33516, Egypt

² Control and Systems Engineering Department, University of Technology, Baghdad, Iraq.

³ Mechanical Engineering Department, College of Engineering, Prince Sattam bin Abdulaziz University, Alkharj, 16273, Saudi Arabia.

⁴ Mechanical Engineering, Faculty of Engineering, Kafrelsheikh University

⁵ Mechanical Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, Egypt

10.21608/jctae.2022.158802.1008

Abstract

Access to clean water is being limited throughout the globe day by day. Several illnesses are caused by water supplies that are contaminated or not distilled. Immediately people's necessity is to purify water without impacting the environment. Solar distillation is an extremely clean distillation in a water treatment procedure. Solar still is among the methods for water purification that produce potable water. Several atmospheric and operational factors require the still lay-out to be augmented. As is commonly known, the vertical sides of the SS become hotter as solar radiation hits them, and the high temperature area resulted in considerable energy losses to the surroundings. To increase the profitability of solar stills, researchers have investigated a variety of models. Throughout its experiments, the solar still with rotating components has been regarded as a reliable and efficient system. Throughout this comprehensive review, we presented, clarified, and analyzed the status of various techniques used to reduce losses of back wall of solar stills solar distillers, for instance rotating wick, vertical wick, drum, trays, discs... etc. Diverse outcomes (highest daily output & improvement) demonstrated the significance of rotating parts, including vertical wick distiller (7.2 L/m2/d & 154%), moving wick solar still (9.17 L/m2/d & 315%), drum distiller (9.22 L/m2/d & 350%), and vertical disc distiller (16.5 L/m2/d & 617.4%).

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