Experimental Evaluation of a Mobile Wick Solar Still with External Condenser in Rennes, France| Chapter 7 | Scientific Research, New Technologies and Applications Vol. 3

This study assesses the performance of a novel mobile wick solar still with a passive external condenser, designed and manufactured by IPFH2O. The objective of the system is to facilitate the production of potable water from non-potable water sources through the utilisation of solar energy. The system is designed for use in areas where access to drinking water remains a significant challenge. The tests were conducted over a four-day period between October and December 2021 at the University of Rennes 1, which is situated in Brittany, an area characterised by a sub-oceanic climate. The system was monitored manually in accordance with a one-hour interval schedule on the test days. The data collected included measurements of the temperatures of the components, the relative humidity, the global insolation, and the hourly production. This data was then used to calculate the system's energy and exergy yields in order to assess the system's performance. The data collected enables the system's performance to be determined and compared with that of other existing solar installations. In addition, the data allows for the characterisation of the system's operation and the proposal of technical solutions to optimise it. Distilled water production is halted completely when the sun's rays are too weak to rotate the belt, before terminating the acquisition. The obtained data is initially processed and recorded using XFlow software. It is then converted into Excel format for further analysis.

 

Author (s) Details

Sory Diarra
Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Université Cheikh Anta Diop de Dakar, Ecole Supérieure Polytechnique de Dakar, BP: 5085, Dakar-Fann, Sénégal.

 

Sidy Mactar Sokhna
Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Université Cheikh Anta Diop de Dakar, Ecole Supérieure Polytechnique de Dakar, BP: 5085, Dakar-Fann, Sénégal.

 

Souley Faye
Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Université Cheikh Anta Diop de Dakar, Ecole Supérieure Polytechnique de Dakar, BP: 5085, Dakar-Fann, Sénégal.

Paul Byrne
LGCGM, Université de Rennes, 35000, Rennes, France.

 

Ousmane Sow
Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Université Cheikh Anta Diop de Dakar, Ecole Supérieure Polytechnique de Dakar, BP: 5085, Dakar-Fann, Sénégal.

 

 

 

Please see the book here:- https://doi.org/10.9734/bpi/srnta/v3/2184

 

Assessing the Effect of Top Cover Material on Productivity of the Solar Distillation Unit | Chapter 3 | Current Research Progress in Physical Science Vol. 4

The provision of safe drinking water for all remains a global challenge in spite of astounding developments in science and technology. In the coastal region of Bangladesh, brackish or saline water prevails everywhere and people are always in search of safe drinking water. This work was taken up to design a cost-effective and simple domestic-scale solar water distillation device for use in the coastal villages of Bangladesh where saline-free drinking water is scarce. This study mainly looked at the feasibility of using stretched transparent PVC cover in solar distillation devices in lieu of traditionally used transparent glass sheets. In the present work, two solar-powered small-sized desalination units or ‘solar stills’ were designed and fabricated using locally available low-cost materials. In designing these solar desalination units, the main considerations were the availability of materials, cost, efficiency, ease of construction and ease of maintenance. To increase the total evaporative surface area of the bottom of stills, those were covered with black cotton fabrics with extended fibres. For the same angle of inclination (130) of the transparent cover, the average amount of distilled water produced by the transparent PVC sheet-covered still was about 42% of that collected from a glass sheet-covered still. The reason behind this poor performance could be traced to the increased surface adhesion of condensed water droplets with the PVC cover, which essentially scattered sunrays away from the solar still. So the way to go is to find a suitable plastic sheet material that has reduced surface adhesion to water or to find a coating material that can reduce surface adhesion too. Unless this can be done, traditional glass-covered solar distillation device still remains the cover material of choice. It is concluded that solar distillation could provide a practical solution to the drinking water needs of the people living in the coastal areas of Bangladesh and other low-resource countries where nothing but brackish or saline water is available during most of the year.

 

Author (s) Details

Most. Hosney Ara Begum
Pilot Plant and Process Development Center & BCSIR Dhaka Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh.

 

M. Abu Yousuf
Department of Biomedical Physics & Technology, Dhaka University, Dhaka, Bangladesh.

 

K Siddique-e Rabbani
Department of Biomedical Physics & Technology, Dhaka University, Dhaka, Bangladesh.

 

 

Please see the book here:- https://doi.org/10.9734/bpi/crpps/v4/2272