1,721,088 research outputs found
Efficiency and reliability comparison of DC-DC converters for single phase grid connected photovoltaic inverters
No full textOverview of distributed energy resources in the context of local integrated energy systems
No full textThe present evolution of the energy systems is characterized by an increase of small-size solutions, with which new aggregations of local integrated energy systems are emerging. The current policies on cleaner and efficient energy systems are providing opportunities to the development of systems supplied by renewable energy sources, and to the combined production from multiple energy carriers. Regulatory evolutions are enabling the existence and operation of local energy markets and energy communities.
This chapter provides an overview of the relevant literature concerning the use of distributed energy resources in the context of local energy systems. The chapter is organized in three parts. In the first part, the aspects addressed include the deployment of local solutions to generate, store, and manage energy at small scale and micro-scale. The second part deals with grid-related aspects and solutions for optimal grid operation. The third part discusses various emergent aspects referring to local energy systems, markets and energy communities, which are gaining relevance in the present and future context of energy transition
Challenges and Opportunities of the Energy Transition and the Added Value of Energy Systems Integration
No full textThis book addresses the topic of integrated energy systems and networks by also providing a comprehensive overview of the emerging technologies and systems that characterize this new energy paradigm. It discusses the energy transition toward a low- or even carbon-neutral energy system, which brings many challenges and opportunities, and the significant progress that is necessary for today's energy systems to change toward satisfying the needs of the society and the economy by becoming as environmentally sustainable as possible. Achieving this goal requires fully integrated energy systems able to supply low-carbon energy for all sectors from different energy sources, while integrating multiple energy carriers and exploiting the synergies coming from this interplay. An integrated energy system can be seen as a multi-energy system relaying on multiple energy carriers and characterized by a high level of integration between all related networks, supported by energy storage of different types and power conversion processes. The uniqueness of this book is in its holistic approach toward the concept of integrated energy systems, which will characterize the future energy system, by addressing the topic in a comprehensive way while also focusing the attention on the main emerging technologies playing a major role in integrated energy systems and networks
Optimal operation of residential micro-CHP systems with thermal storage losses modelling
No full textIn this study the optimal operation of micro-CHP systems producing electricity and heat for a single-family house situated in Italy is addressed considering the effects of heat dissipation relative to thermal storage systems. Three different prime movers have been analyzed separately, and for each of them the operation scheduling that maximizes the revenues for the energy cogeneration with respect to the separate generation has been evaluated by means of an optimization algorithm
Measurement uncertainty on smart phone
No full textToday the number of phones in the world are more than five billion. In the last generation of phone there are a subset called smartphone, the use of this subset is growing. These devices are more and more sophisticated, capable of measuring many parameters from environment. In order to do that this smartphone is equipped with a several sensors and by means of an application (APP) that pick up the information from each sensor, it is possible to send, share, analyze, and display the measured data. Nevertheless, people could use this data without real information on accuracy of measured parameters. Thanks to these devices in the next few years there will be the opportunity to have a big wireless sensor network. With this paper the authors try to tackle the uncertainty question related to sensors suited to smart phone or any other android devices. The main goal has been to address this new idea implementing the first application that analyze a method of calibration with the aim of evaluating the uncertainty of sensors data
Transition Potential of Local Energy Communities
No full textIn this chapter, the authors address the role of local energy communities (LEC) in the transition toward a low- or even carbon-neutral energy system. LECs are contextualized in the broader framework of the energy revolution started after Paris Agreements in December 2015 that led to the definition of 17 “sustainable development goals (SDGs)” by United Nations (UN) and to the establishment of the Clean Energy Package by European Commission in 2019. At global level, Energy Communities play a pivotal role to achieve United Nations SDG 7 (“Ensure access to affordable, reliable, sustainable and modern energy for all”) and 11 (“Make cities and human settlements inclusive, safe, resilient and sustainable”), the former more focused on rural communities and the latter more focused on urban context. This is even more true if thinking that reducing energy poverty, by bringing clean and affordable energy in rural areas through hybrid energy systems, is a fundamental strategy to develop rural contexts while also reducing migration toward urban areas and megacities. At European level, Energy Communities have a fundamental role in a consumer-centered energy system in which consumers and prosumers are fully engaged and play an active role both in single and in aggregated forms also with new forms of citizen participation (citizen energy communities). Indeed, LECs provide the right framework for increasing awareness, engagement, and empowerment of citizens in the energy sector. Moreover, LECs can be considered as multi-energy environments in which different energy systems and vectors can be integrated in order to optimally exploit the synergies among energy and non-energy networks (e.g. water distribution network and desalination systems). This is even more true when dealing with “geographical” or “energy” islands in which local energy communities are well identified by geographical or network boundaries. In the second part of the chapter, the authors will provide a vision on how the technologies and systems presented in this book, implemented in local multi-energy communities, can support the achievement of goal of a transition toward carbon-neutral energy systems. Finally, the authors present a vision for the future role of LECs in the energy transition, starting from the experience of European Green Deal
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