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Investigation on Productivity Enhancement of a Solar Still with Transparent Polythene Film Cover and Cylindrical Hollow Fins for Heat Storage

Riahi Ali, Zakaria Nor Azazi, Isa Mohamed Hasnain, Zainol Mohd Remy Rozainy Mohd Aref, Mahinder Singh Balbir Singh, Shaharuddin Syafiq, Yusof Mohd Fazly

Journal of Ecological Engineering

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2021

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Vol. 22, nr 1

95--103

EN

This paper discussed the experimental performance of a solar still with cylindrical hollow fins that were integrated to a black painted stainless-steel basin. The cover of the solar still was made of transparent polythene film, while the frame was made of polyvinyl chloride (PVC). Mild steel cylindrical hollow pipes of 0.035 m diameter were used as fins in the solar still. The performance of this solar still (PSSCHF) was compared with the performance of a conventional solar still (PSS1) which was made of similar fabrication materials, but without using fins in its basin. Each solar still basin contained water with the depth of 1 cm that was collected from a pond located at the Universiti Sains Malaysia (USM) campus. Both PSSCHF and PSS1 solar stills were exposed to similar climatic conditions within the same locality at USM during the experiments. The purpose of using the fins in the basin of PSSCHF was to absorb more heat from solar irradiance. The PSSCHF attained a maximum productivity of 4.49 l/m2•d, whereas the PSS1 obtained a maximum water production of 3.97 l/m2•d. The quality of fresh water produced from the solar stills met the World Health Organization potable water standards.

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Yield Efficiency Evaluation of Double Slope Solar Stills Connected with External Spiral Copper for Potable Water Production

Al-Qadami Ebrahim Hamid Hussein, Ahsan Amimul, Abdurrasheed Abdurrasheed Sa'id, Mustaffa Zahiraniza, Yusof Khamaruzaman Wan, Takaijudin Husna, Malek Marlinda Abdul

Journal of Ecological Engineering

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2019

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Vol. 20, nr 7

176--186

EN

Among the key challenges of the 21st century, one can enumerate finding efficient technologies to enhance water purification. Seawater desalination had been identified as one of the main alternative solutions to increase the water resources on our planet and fulfill human demands. In this study, the yield performance of double slope solar still connected with the external spiral copper pipe as the water heater was investigated. Active and passive solar stills of equal evaporation area with covers (4 mm thickness and 45° slope in both sides) were manufactured using Perspex. Different parameters were investigated and compared during the experiment including yield and water quality indicators from both stills. The results showed a strong relationship between the water production rates and solar radiation intensities, water temperature as well as ambient temperature. Additionally, the water productivity from the active still was 20% higher compared to the passive one. Overall, the water quality parameters were within the acceptable limits, the rate of distillate water production was found to increase along with solar radiation intensity and water temperature.

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Enhancing the Productivity of a Roof-Type Solar Still Utilizing Alumina Nanoparticles and Vacuum Pump

Mutlq Eslam, Hamdan Mohammad, Al Asfar Jamil

Journal of Ecological Engineering

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2019

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Vol. 20, nr 4

187--193

EN

Unlike conventional fresh water producing systems, from saline or brackish water, the innovative solar water producing systems are efficient and effective. Experiments were conducted on two identical roof-type solar stills and simultaneously tested under the same weather conditions. One of these stills was modified by integrating a vacuum pump to lower the pressure inside while the other still was used as a reference unit. Different concentrations of Al2O3 nanoparticles were chosen, 0.2%, 0.4%, and 0.6%, and used with water inside the modified still. It was verified that the modified still, without nanoparticles, yields 34.84% more production than the conventional still. In addition, the modified still with a 0.4% of Al2O3 nanoparticles produced the highest percentage of distilled water, 44.42% in comparison to the one without the use of Al2O3 nanoparticles, followed by 37.94% and 24.07% for 0.6% and 0.2% of Al2O3 nanoparticles, respectively.

4

Productivity Enhancement of Solar Still with PV Powered Heating Coil and Chamber Step-Wise Basin

Abdallah S.

Journal of Ecological Engineering

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2018

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Vol. 19, nr 2

8--15

EN

There is a strong need to improve the productivity of single slope solar still. PV generator powered electrical heater and chamber step-wise design were introduced to the conventional solar still. An experimental study was performed to investigate the effect of adding the above mentioned modifications on the output parameters of the modified solar still. The inclusion of PV-powered heating coil and chamber step-wise design enhanced the productivity of distiller by up to 1098%.