Énergie
Solar still productivity improvement using nanofluids: a comprehensive review
The production of drinking water is a critical issue due to the lack of access to clean water and the increasing demands of the environment. One of the main technologies for water purification is solar still. Solar distillation is an economical and ecological alternative for the production of quality distilled water. Many recent researches on the use of nanofluids in solar still have focused on its performance, which subsequently implies an increase in the productivity of the solar still, whereas thermophysical and evaporation properties of the base fluid are changed by suspended metallic or non-metallic nanoparticles. According to some reports, the use of nanofluids can raise the distillate productivity up to 100%, other works revealed an improvement up to 20% in terms of thermal efficiency compared to the Conventional solar still. The current review summarizes previous works that studied the improvement of solar still productivity using nanofluids, a significant portion of analysis and discussion is devoted to how different factors affecting the global performance of these devices including nanofluids proprieties, radiation absorption, evaporation and condensation. Finally, propositions for future numerical and experimental research and application guidance are also presented. Voir les détails
Mots clés : nanofluids and nanoparticles, Solar still, water desalination
CoSoTIA Project: Decision Supportfor the Choice of Concentrated SolarTechnologies for Electricity Generation
The CoSoTIA (Concentrated Solar Technologies for Industrial Applications)project initiated by the CRTI center in collaboration with the URMPEunit concerns the study and development of CSP solar concentrators for industrialapplications. In the present work, we present decision support tools for thechoice of a solar concentration technology for sites in Algeria. They will be usedfor the comparison between different technologies of solar concentration e.g.:cylindro-parabolic, parabolic, solar tower, etc. The models used include projectcosts and site characteristics; they incorporate also engineering knowledge (economic,social, technical and environmental). The information needed for decisionmakingproduced by these tools is: the total cost of the project, indicators witheconomic, social, technical and environmental aspects. The case studies presentedwere conducted under the SAM Advisor environment, which was developed toevaluate the capacities to implement CSP project in order to produce expertisefor the different actors through an application on a given site (by the client). Fourcase sites in Algeria and for two types of solar concentrator plant are studied andpresented. A comparative study was conducted and for each site the best CSP wasdeduced and commented. Voir les détails
Mots clés : Decision support, Multicriteria analysis, Solar concentration