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Since their creation eight years ago, the EERA Joint Programmes and their participating institutions have accumulated important knowledge on specific topics of the programmes they carried out. This includes Smart Cities and Positive Energy Districts, which are not only crucial topics tackled by EERA Joint Programme in the Smart Cities Workplan, but also in H2020 as well as Horizon Europe or national calls, focusing on innovative solutions based on interdisciplinary approaches, which are needed to face the highly complex challenges in coming years, from sustainable urban development to emergencies in cities due to the COVID-19 pandemic. The foreword of EERA JP in SC Special Issue 1|2018 highlighted the aim of the Special Issues series, which was, and still is, to support the growth of research networks in the EC framework. According to this, our ambition is to publish the most promising research and innovation projects which EERA JPonSC partners, and others, set up in the framework of H2020 Programme, to drive the attention to the fact that EERA JP on SC is one of the strong voices in research in Europe, capable of highlighting and integrating different solutions and points of view.

Research & information: general --- Technology: general issues --- positive energy districts labs --- testing facilities --- factsheets --- statistical studies --- electric buses --- greenhouse gas emissions --- low carbon energy public transport --- public transport --- sustainable development --- Polish city --- smart city --- renewable energy --- distributed generation --- urban policy --- Poland --- governance --- energy flexibility --- positive energy districts --- sustainable energy --- smart city deployment --- behaviour change --- carbon footprint: citizen motivation --- sustainability --- energy modelling --- building thermal performance --- refurbishment potential --- multivariable evaluation --- GIS --- TRNSYS --- centralized energy systems --- district heating systems --- energy demand in buildings --- distributed energy sources --- photovoltaic systems --- Positive Energy District (PED) --- PED Booklet --- SET-Plan --- positive energy district --- climate-neutral cities --- 15-minute city --- downsizing district --- doughnuts --- post-COVID-19 scenario for RD&amp --- I funding --- Positive Energy District --- sustainable urban areas --- transition --- positive energy districts labs --- testing facilities --- factsheets --- statistical studies --- electric buses --- greenhouse gas emissions --- low carbon energy public transport --- public transport --- sustainable development --- Polish city --- smart city --- renewable energy --- distributed generation --- urban policy --- Poland --- governance --- energy flexibility --- positive energy districts --- sustainable energy --- smart city deployment --- behaviour change --- carbon footprint: citizen motivation --- sustainability --- energy modelling --- building thermal performance --- refurbishment potential --- multivariable evaluation --- GIS --- TRNSYS --- centralized energy systems --- district heating systems --- energy demand in buildings --- distributed energy sources --- photovoltaic systems --- Positive Energy District (PED) --- PED Booklet --- SET-Plan --- positive energy district --- climate-neutral cities --- 15-minute city --- downsizing district --- doughnuts --- post-COVID-19 scenario for RD&amp --- I funding --- Positive Energy District --- sustainable urban areas --- transition

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Since their creation eight years ago, the EERA Joint Programmes and their participating institutions have accumulated important knowledge on specific topics of the programmes they carried out. This includes Smart Cities and Positive Energy Districts, which are not only crucial topics tackled by EERA Joint Programme in the Smart Cities Workplan, but also in H2020 as well as Horizon Europe or national calls, focusing on innovative solutions based on interdisciplinary approaches, which are needed to face the highly complex challenges in coming years, from sustainable urban development to emergencies in cities due to the COVID-19 pandemic. The foreword of EERA JP in SC Special Issue 1|2018 highlighted the aim of the Special Issues series, which was, and still is, to support the growth of research networks in the EC framework. According to this, our ambition is to publish the most promising research and innovation projects which EERA JPonSC partners, and others, set up in the framework of H2020 Programme, to drive the attention to the fact that EERA JP on SC is one of the strong voices in research in Europe, capable of highlighting and integrating different solutions and points of view.

positive energy districts labs --- testing facilities --- factsheets --- statistical studies --- electric buses --- greenhouse gas emissions --- low carbon energy public transport --- public transport --- sustainable development --- Polish city --- smart city --- renewable energy --- distributed generation --- urban policy --- Poland --- governance --- energy flexibility --- positive energy districts --- sustainable energy --- smart city deployment --- behaviour change --- carbon footprint: citizen motivation --- sustainability --- energy modelling --- building thermal performance --- refurbishment potential --- multivariable evaluation --- GIS --- TRNSYS --- centralized energy systems --- district heating systems --- energy demand in buildings --- distributed energy sources --- photovoltaic systems --- Positive Energy District (PED) --- PED Booklet --- SET-Plan --- positive energy district --- climate-neutral cities --- 15-minute city --- downsizing district --- doughnuts --- post-COVID-19 scenario for RD&amp --- I funding --- Positive Energy District --- sustainable urban areas --- transition

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A Smart City is the perfect environment to study and exploit the interactions between actors because its architecture already integrates vaious elements to collect data and connect to its citizens. Furthermore, the proliferation of web platforms (e.g., social media and web fora) and the increased affordability of sensors and IoT devices (e.g., smart meters) make data related to a large and diverse set of users accessible, as their activities in the digital world reflect their real-life actions. These new technologies can be of great use for the stakeholders as, on the one hand, they provide them with semantically rich inputs and frequent updates at a relatively cheap cost and, on the other, form a direct channel of communication with the citizens. To fully exploit these new data sources, we need both novel computational methods (e.g., AI, data mining algorithms, knowledge representation) that are suitable for analyzing and understanding the dynamics behind energy consumption and also a deeper understanding of how these methods can be integrated into the existing design and decision processes (e.g., human-in-the-loop processes).Therefore, this Special Issue welcomed original multidisciplinary research works about AI, data science methods, and their integration in existing design/decision-making processes in the domain of energy consumption in Smart Cities.

Research & information: general --- Physics --- building energy flexibility --- HOMER software --- peak clipping --- load shifting --- energy saving --- building performance assessment --- indoor environment quality --- occupants’ satisfaction --- post-occupancy evaluation --- Green Building Index --- tropical climate --- building performance simulation --- CO2 emission --- occupant’s comfort --- window allocation --- climate change --- energy consumption --- building energy load --- thermal load --- future weather --- operative temperature --- cooling load --- daily energy need --- solar gains --- nZEB --- historical buildings --- TRNSYS --- buildings retrofitting --- buildings office --- economic feasibility --- Renewable Energy Systems (RESs) --- Zero Energy District (ZED) --- Digital Twin (DT) --- Building Information Modelling (BIM) --- Geographic Information System (GIS) --- Revit software’s --- asymmetric duty cycle control --- bifilar coil --- pulse duty cycle control --- induction heating --- metal melting --- phase shift control --- pulse density modulation --- series resonant inverter --- variable frequency control --- building operation and maintenance --- extended reality --- virtual reality --- augmented reality --- mixed reality --- immersive technologies --- digital twins --- metaverse --- positive energy district --- district energy infrastructure --- decarbonisation of neighbourhoods --- GIS --- energy transition --- smart city policy --- carbon emission intensity --- digital transformation --- green innovation --- difference-in-differences --- n/a --- occupants' satisfaction --- occupant's comfort --- Revit software's

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Rising pollution, climate change and the depletion of fossil fuels are leading many countries to focus on renewable-based energy conversion systems. In particular, recently introduced energy policies are giving high priority to increasing the use of renewable energy sources, the improvement of energy systems’ security, the minimization of greenhouse gas effect, and social and economic cohesion. Renewable energies’ availability varies during the day and the seasons and so their use must be accurately predicted in conjunction with the management strategies based on load shifting and energy storage. Thus, in order to reduce the criticalities of this uncertainty, the exploitation of more flexible and stable renewable energies, such as the geothermal one, is necessary. Geothermal energy is an abundant renewable source with significant potential in direct use applications, such as in district heating systems, in indirect use ones to produce electricity, and in cogeneration and polygeneration systems for the combined production of power, heating, and cooling energy. This Special Issue includes geothermal energy utilization and the technologies used for its exploitation considering both the direct and indirect use applications.

geothermal power production --- abandoned oil reservoirs --- in situ combustion --- organic Rankine cycle (ORC) --- plunger pump --- centrifugal pump --- pressure drop --- temperature utilization rate --- system generating efficiency --- carbonate geothermal reservoirs --- sustainable geothermal energy exploitation --- southern Italy --- numerical simulation --- dual-loop ORC --- mixture working fluids --- entropy generation --- entransy loss --- exergy loss --- Ground source heat pump --- oval cross-section --- groundwater --- borehole heat exchanger --- CFD --- Sandtank --- granite --- physical characteristics --- cyclic --- thermal treatment --- water cooling --- hybrid renewable polygeneration plant --- micro organic Rankine cycle --- evacuated solar thermal collectors --- photovoltaic panels --- plastic heat exchanger --- Organic Rankine Cycle --- geothermal energy --- shell and tube heat exchanger --- fouling resistance --- mobile thermal energy storage (M-TES) --- phase change material (PCM) --- LCOH --- heat transport --- renewable energy source --- household hybrid system --- dynamic simulation --- economic analysis --- TRNSYS software --- heating and cooling network --- polygeneration system --- geothermal energy community --- ORC --- energy district --- heat pump --- R1234ze --- CO2 --- geothermal --- renewable energy --- historic building --- energy saving --- earth-to-air --- horizontal pipe --- 2D model --- air conditioning --- renewable energy sources --- thermal performances --- energy efficiency --- parametric study --- geothermal resource --- Monte Carlo simulation --- assessment --- thermal reservoir --- North Jiangsu Basin