Results 1 - 10 of 13224
Results 1 - 10 of 13224. Search took: 0.038 seconds
|Sort by: date | relevance|
[en] Here we present the different aspects of the EUROSUNMED project. The scientific targets of EUROSUNMED are the development of new technologies in three energy field areas, namely photovoltaics (PV), concentrated solar power (CSP) and grid integration (GI), in strong collaboration with research institutes, universities and SMSs from Europe in the north side of the Mediterranean sea and from Morocco and Egypt from the south of the sea. the focus in PV will be on thin film (Si, CZTS) based solar cells and modules while the goal in CSP field is to design and test new heliostats as well as novel solutions for energy storage compatible with these technologies. The project aims at producing components that will be tested under specific conditions of MPC (hot climate, absence of water, etc.). Such investigations are complemented with studies on grid integration of energy sources from PV and CSP in Morocco and Egypt context. Additionally, the consortium envisages training PhD students and post-docs in these interdisciplinary fields (chemistry, physics, materials science) in a close and fruitful collaboration between academic institutions and industry from EU and MPCs. The consortium is well placed around leading academic groups in materials science and engineering devices and equipments for the development of PV and CSP, and also in the promotion of the renewable energies in general. Moreover, technology transfer and research infrastructure development in the targeted areas will be provided. Disseminating the results of the projects will be done through the organization of summer schools and stakeholders involved in the 3 selected energy area and beyond. Another outreach of the project will be the proposal for a roadmap on the technological aspects (research, industry, implementation) of the PV, CSP and grid area as well as on the best practice for the continuation of strong collaboration between the EU and MPCS partners and beyond for mutual interest. (author)
[en] Energy storage must play a crucial role in the widespread adoption of renewable energy sources because they are intermittent. In addition, energy storage is also important in matching the electrical power load with the generation capacity to improve the overall power plant efficiency. This point has been recognized in the recent California state mandate for the electrical utility companies to have energy storage at each power plant in order to utilize their generation capacity more efficiently. While electrochemical energy storage is still very expensive, thermal energy storage can be cost effective even at the present commercial development level, especially for solar CSP plants and conventional thermal power plants. Use of phase change materials for thermal energy storage can increase the storage density, reduce the size and therefore reduce the costs even further. However, it presents certain challenges in terms of poor heat transfer and material compatibility issues. This presentation will describe how these challenges have been overcome by innovative and transformative solutions to develop thermal energy storage using phase change materials at a system cost of less than $15/kWhth as compared to the present commercial thermal energy costs of more than $30/kWhth. (author)
[en] To promote the hybrid solar dryers for use even under unfavorable weather and to overcome the intermittance state issue, the energy consumption should be optimized and the response time should be reduced. This work concerns a drying chamber connected to a solar absorber where the air can be heated also by combustion of gas and by electric resistance. To optimize the control parameters, an evolutionary optimization algorithm simulating natural selection was used. It was combined with a predictive model based on the artificial neural networks (ANN) technique and used as a fitness function for the genetic algorithm (GA). The ANN is a learning algorithm that needs training through a large dataset, which was collected using CFD simulation and experimental data. Then a GA was executed in order to optimize two objectives: The energy consumption and the t95% response time in which the drying chamber temperature reaches its set point (60°C). After optimization, a 30% decrease of the t95% response time, and 20% decrease of the energy consumption were obtained. (Author)
[en] Decreasing energy costs from renewable sources could enable many African countries to make the leap into a clean future. This would save the continent the detour via the classic dirty sources.
[de]Sinkende Kosten fuer Energie aus erneuerbaren Quellen koennten vielen afrikanischen Laendern den Sprung in eine saubere Zukunft ermoeglichen. Damit wuerde sich der Kontinent den Umweg ueber die klassischen schmutzigen Quellen sparen.
[en] Pakistan is facing severe energy crisis due to unprecedented increase in the energy cost at the international level and widening gap between supply and demand of energy at national level. This crisis is eroding the economic growth of the country achieved during last five years. At the same time Pakistan is located at very feasible built for harnessing the renewable energy like solar energy, wind energy and biomass. Hence the crisis of energy in Pakistan has become an opportunity for the renewable energy. In this paper the possibilities have been discussed. A practical case study of Allama Iqbal Open University Pakistan has been developed. The study has revealed that solar can be used for financial and environmental benefits at Pakistan. (author)
[en] The goal of reducing energy consumption (EC), losses and waste (FL) in the food processing is a challenges in the worldwide. The use of active solar greenhouse dryers (GHD) for EC and FL reductions has increased due to its capacity, and low operating costs. In this work the effective diffusivity (Deff) and the moisture content modeling were analized for basil (Ocimum basilicum) and blackberry pulp (Rubus rosoideae) dried in a conventional stove (CD) and an GHD coupled to an additional air solar heating system (SCHa). The loss of water and the drying rate in food materials dehydrated in the GHD is consistent with the increment or decrement of temperature during the solar day. The Deff values for basil and blackberry pulp was ranged between - 1.1044x10-7 and -3.9167x10-9. The solar energy obtained in the GHD supplied the heating requirements. In general, the Page’s model was the best fit for the drying kinetics for basil and blackberry pulp. (Author)
[en] India faces a major challenge in providing a long-term energy security needed for meeting the aspirations of her growing population and, at the same time, in fulfilling her commitments for preventing generation of greenhouse gases. Use of non-fossil energy sources is the solution. There is a need for making a right balance of generation of energy from sources such as solar and wind which are, by nature, distributed and intermittent and from nuclear which is concentrated and continuous. It will be highlighted in this presentation how the solar and nuclear energy – the two primary energy sources can complement each other in supplying energy in a sustainable manner
[en] Technical performance of two solar drying technologies was evaluated: Solar Greenhouse Drying (SGD) with auxiliary heating system, and Direct Solar Drying (DSD) in order to evaluate its effect on antioxidant activity (AA) and total flavonoids of blackberry (rubus spp) waste destined. The SDG and DSD results were compared with those of the dehydrated samples in an electric stove (ES). The fresh and dried fruits were evaluated; the blackberry seedless pulp was used. The AA and flavonoids showed degradation of 70% and 20% compared to the fresh sample. For both compounds, SGD is the one that offers the greatest conservation. (Author)