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Electricity is currently not available for 1. The achievement of such objectives requires and encourages the spread of RESs in the global energy mix, gradually replacing depleting and polluting energy sources based on fossil fuels, which still have the main incidence on the energy sector.
RESs already play a major role in several countries, due to the technological development and the increasing market competitiveness, and the world renewable power capacity reached However, supporting policies, robust investments from the private sector and efforts from the scientific community are still crucial to demonstrate the technical and economic sustainability and effectiveness of RESs, helping their large-scale diffusion.
Starting from such a background, this Ph. D dissertation focuses on the study, design and development of methods and tools for the optimization and enhancement of renewable energy technologies and their effective integration with energy storage solutions and traditional energy sources powered by fossil fuels hybrid energy systems.
Such parameters are the input of the analytic models developed for the techno-economic design of photovoltaic PV plants and small wind turbines SWTs and applied to the economic feasibility study, through multi-scenario analysis, of such systems in some of the main European Union EU Countries.
Among the obtained results, the self-consumption of the produced energy plays a crucial role in the economic viability of SWTs and Modello excel business plan fotovoltaico plants and, particularly, after the partial or total cut of incentives and uncertainties related to supporting policies within the EU context.
The study of the energy demand profile of a specific user and the adoption of battery energy storage BES systems have been identified as effective strategies to increase the energy self-consumption contribution.
The economic profitability of the grid connected PV-BES HES, evaluated for a real case study, is comparable with PV plants without storage in case of a significant gap between the cost of energy purchased from the grid and the price of energy sold to the grid, but high BES system costs due to the initial investment and the maintenance activities and the eventual presence of incentives for the energy sold to the grid can make the investment not particularly attractive.
Thus, the focus has shifted to the techno-economic analysis of off-grid HES to meet the energy demand of users in remote areas. In this context, BES systems have a significant role in the operation and management of the system, in addition to the storage of exceeding energy produced by the intermittent and variable RESs.
The analysis has also been strengthened by an industrial application with the aim to configure, test and install two off-grid HESs to meet the energy demand of a remote village and a telecommunication system. In parallel, two experimental activities in the context of solar concentrating technology, a promising and not fully developed technology, have been carried out.
The latter activity deals with the development of a low cost thermal energy TES storage prototype for concentrating solar power CSP plants.
TES systems show a great potential in the CSP plants profitability since they can overcome the intermittent nature of sunlight and increase the capacity factor of the solar thermal power plant.
Concluding, the present Ph. D dissertation describes effective methods and tools for the optimization and enhancement of RESs. The obtained results, showing their critical issues and potential, aim to contribute to their diffusion and favor a sustainable development.
Tali servizi sono attualmente indisponibili per circa 1. Il raggiungimento di tali obiettivi richiede e incoraggia la diffusione di fonti energetiche rinnovabili FER all interno del mix energetico globale, rimpiazzando gradualmente le fonti di energia convenzionali basate su combustibili fossili, inquinanti e in via di esaurimento, che hanno ancora l incidenza principale nel settore energetico.
Lo studio specifico del profilo di domanda 8 IV elettrica delle utenze e l impiego di sistemi di accumulo di energia sono stati identificati come strategie efficaci al fine di incrementare la quota di autoconsumo.
Tali considerazioni hanno portato allo sviluppo di un modello analitico utile alla progettazione tecnico-economica un sistema energetico ibrido connesso alla rete Nazionale integrante un impianto FV e un sistema di accumulo a batterie. Il sistema di accumulo consente di compensare la natura intermittente e variabile della fonte solare incrementando le ore di funzionamento dell impianto termodinamico con i conseguenti benefici economici.
Concludendo, la presente tesi di dottorato include la descrizione di metodi e strumenti per l ottimizzazione e valorizzazione delle FER.Search.
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