3E enhancement of freshwater productivity of solar still with heater, vibration, and cover cooling

This study focused on experimentally increasing the productivity of freshwater from solar stills. The performance of a single solar still system could be augmented with the combination of an electric heater, vibration motion, and thermoelectric cooling. The study investigated the effects of combinin...

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Bibliographic Details
Published in:	Environmental science and pollution research international Vol. 29; no. 43; pp. 65787 - 65805
Main Authors:	Dawood, Mohamed M. Khairat, Omar, Abubakr Helmy, Shehata, Ali Ismail, Samir Shehata, Ahmed, Taha, Ahmed Abd-Elsalam, El-Shaib, Mohamed Nabil, Mohamed, Madeha Kamel
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2022 Springer Nature B.V
Subjects:	Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Carbon dioxide Climate Climatic conditions Condensates Coolers Cooling D C motors Desalination Earth and Environmental Science Ecotoxicology Electric motors Environment Environmental Chemistry Environmental Health Environmental science Evaporation Evaporation rate Fresh water Mechanical engineering Motor task performance Phase transitions Photovoltaics Productivity Radiation Research Article Rotating disks Salvage value Solar energy Solar panels Solar stills Springs (elastic) Summer Thermoelectric cooling Vibration Waste Water Technology Water heaters Water Management Water Pollution Control Water temperature Solar still Vibration Daily productivity Thermoelectric cooler Solar radiation Freshwater Enhancement
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Summary:	This study focused on experimentally increasing the productivity of freshwater from solar stills. The performance of a single solar still system could be augmented with the combination of an electric heater, vibration motion, and thermoelectric cooling. The study investigated the effects of combining two of these components and finally combining all of them on freshwater productivity. The electric heater and vibration motion are used to enrich the evaporation rate, while thermoelectric coolers are used to enhance the condensation rate, leading to high freshwater productivity. The proposal, construction, and testing of two identical solar stills were performed under the local climate conditions of the city of Alexandria in northwestern Egypt during the summer and winter times. The two solar stills had a 1-m 2 base area. An electric heater of 450 W was placed inside the modified solar still. The modified solar still was fixed on four coiled springs. A 1-hp power DC motor, an inverter, a control unit, and two 330-W photovoltaic solar panels were attached to the modified solar still. Eccentric masses were mounted on the rotating disk attached to the DC motor to generate the vibration. Under the same climate conditions, the daily output of freshwater was measured experimentally for the modified case and the conventional solar. The daily rates of freshwater productivity in summer were investigated for four cases and the conventional one. Results showed that the peak daily freshwater productivity achieved with the solar heater, thermoelectric coolers, and vibration motion was 12.82 kg/day, with a maximum estimated cost of 0.01786 $/L/m 2 .The exergoeconomic of the modified solar still with heater, vibration, and thermoelectric cooler was greater than that of conventional ones. The highest CO 2 mitigation of the case (5) and that of the conventional solar desalination were about 160 tons and 28 tons, respectively.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Responsible Editor: Philippe Garrigues.
ISSN:	0944-1344 1614-7499
DOI:	10.1007/s11356-022-20340-9