Sustainable development of the Prefecture of Kephalonia
An optimisation methodology is applied on the islands of Kephalonia and Ithaca (Prefecture of Kephalonia) in Greece, where various Renewable Energy Sources (RES) can be found and could be exploited to satisfy part of their energy needs. These resources are examined and a case study is performed for Kephalonia that involves an application of specific mathematical tools that will lead to a set of energy solutions. Many scenarios of cases were examined where the requirements of certain end uses were increased and also cases where some of the renewable energy systems were not at the maximum of their potential.
A linear programming approach for the optimal planning of a future energy system. Potential contribution of energy recovery from municipal solid wastes
Abstract In the present paper the mismatch between the energy supply levels and the end use, in a broader sense, was studied for the Hellenic energy system. The ultimate objective was to optimize the way to meet the country's energy needs in every different administrative and geographical region using renewable energy sources (RES) and at the same time to define the remaining available space for energy recovery units from municipal solid waste (MSW) in each region to participate in the energy system. Based on the results of the different scenarios examined for meeting the electricity needs using linear programming and by using the exergoeconomic analysis the penetration grade was found for the proposed energy recovery units from MSWs in each region.
Larderello-Farinello-Valle Secolo geothermal area: Exergy analysis of the transportation network and
Abstract An energy-exergy study of the geothermal fluid network in the area of Larderello-Valle Secolo-Farinello (Tuscany, Italy), which is currently undergoing modernization and replacement, is described. This study was carried out by setting up a simulation code, which is able to simulate the entire transportation network beginning with the geothermal wells (with relative connections) through the power plants up to the re-injection of the condensed water in the reservoir. In this way, the entire geothermal system can be considered as a semi-closed cycle. The results presented have been obtained by simulating the part of the network built so far (Larderello-Valle Secolo). The study of the entire network, including the Farinello area, will be possible when the transportation and distribution network has been completed. In order to outline the global exergy performance of the system, a study was made of the Larderello and Valle Secolo power stations (running at the present time) with attention paid to the elements that cause the main exergetic losses.