Browsing by Keyword "Energy systems"
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Item Exploring Institutional and Socio-Economic Settings for the Development of Energy Communities in Europe(2022-02-21) Sciullo, Alessandro; Gilcrease, Gregory Winston; Perugini, Mario; Padovan, Dario; Curli, Barbara; Gregg, Jay Sterling; Arrobbio, Osman; Meynaerts, Erika; Delvaux, Sarah; Polo-Alvarez, Lucia; Candelise, Chiara; van der Waal, Esther; van der Windt, Henny; Hubert, Wit; Ivask, Nele; Muiste, Marek; Tecnalia Research & Innovation; Policies for Innovation and TechnologyEnergy communities (ECs), intended as collective action initiatives in the energy field involving citizens’ participation, have been gaining relevance for the past decades as an alternative way to organize the energy chain to challenge the incumbent system. With Europe’s recently adopted Clean Energy Package, ECs found a formal recognition by the European Union as potential actors of the transition of the energy system towards a wider and more decentralized use of renewable sources. Although the potential role of ECs in the transition is therefore hardly questionable, a thorough comprehension of the enabling factors that might foster their diffusion and scaling up is still lacking. Through a comparative analysis of the evolutionary trajectories in six EU countries regarding their energy systems, their regulatory frameworks and their historical evolution of ECs, namely through the example of cooperative models, this paper aims at providing some preliminary evidence about the factors and dynamics that seem to have played, and may play, a role in hampering or facilitating EC model diffusion. Attention is therefore specifically paid to three dimensions of analysis referring to: the energy mix and market structure; the institutional and policy landscape; the wider social attitudes towards environmental issues and cooperation among citizens. In addition to providing a wide comparison of different EU countries, the paper shows that the historical evolution pathways have to be carefully taken into account to understand what might trigger ECs exploitation in the EU.Item Technical & Economical assessment of the interconnection between façade integrated solar thermal system and low temperature district-heating(2019) Lumbreras, Mikel; Garay, RobertoThis paper explores the techno-economic viability of coupling unglazed solar thermal façade system with a low temperature district heating network. this concept allows a more efficient control strategy for heat is allowed, where direct solar heat and heat from district heating are alternated in order to maximize the efficiency of the whole system. ST heat is directly used in the building when there is underproduction and when ST overproduces, this system allows to take profit from the network for the delivery of the excess heat. The use of unglazed collectors for low-intrusive architectural interaction in façades is discussed. Each system separately have proven efficiency, however, the most novel part of the study is finding a method which permits de combination of both technologies, proposing technical solutions and economic studies. Unglazed system reach thermal efficiency up to more than 30% in reference of the total radiation in the south façade, which are similar to other high efficiency solar systems. As for the economic results, it has been made an economic assessment at mid-time sight and positive economic meters have been achieved. Moreover, economic results from simulations prove the viability for unglazed solar district heating when integrated massively in facades.Item Unglazed Solar Thermal Systems for Building Integration, coupled with District Heating Systems. Conceptual Definition, Cost and Performance Assessment(IOS Press, 2018) Lumbreras, Mikel; Garay, Roberto; Martin, KoldobikaIn this paper, the energy performance of a Solar Thermal (ST) façade system is studied for its connection to a District Heating System. This concept allows for the direct use of ST heat in the building, while taking profit from the network for delivery/selling of excess heat and purchase of heat during periods of underproduction. The use of Unglazed Collectors for low-intrusive architectural interaction in façades is discussed. Studies are carried out on the heat production of the system and its capacity to cope with local demands. Economic studies are carried out in order to balance the investment and operational costs/profits of the system.