Application of simultaneous thermoelectric cooling and heating to improve the performance of a solar still

Sa’id Al-Jifri, Said Al Farhan (2022) Application of simultaneous thermoelectric cooling and heating to improve the performance of a solar still. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Solar still is a process of getting clean water from dirty by using the power of sunlight. There are various method to do solar still and one can be done using thermoelectric effect which able to directly converts different temperatures to electric voltage or vice versa via a thermoelectric module. Conventional solar still faces some problems as there are too many designs of solar still, depend on heat from the sunlight and surrounding humidity to collect clean water, and most do not have any monitoring system. This project attempts to increase the efficiency of the solar still by integrating the thermoelectric system into it, analysing water temperature and the level of clean water and developing a real-time monitoring system. The objective can be achieved using galvanised sheet metal and plexiglass to build solar still, WeMos D1 R2 as the main microcontroller, DS18B20 temperature sensor and Water Level sensor Arduino and Peltier thermoelectric TEC1-12706 as the main thermoelectric module. The results showed that the solar still had an increase in water temperature efficiency of 18.44 % compared to without the use of thermoelectric system.

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