Six to ten gigawatts of photovoltaic capacity could be installed on Berlin buildings. More than enough to cover 25 percent of Berlin's electricity supply with solar energy, as envisaged in the plan for Berlin. But the current pace of expansion is decidedly too slow. The Solarcity Berlin master plan envisions producing a quarter of Berlin's electricity consumption with photovoltaics. This goal is to be achieved by 2030. Currently, Berlin's solar systems generate just under half a percent of the energy required in the city. Scientists at the Berlin University of Applied Sciences (HTW Berlin) have now conducted a solar potential study to show for the first time which buildings are suitable for solar installations and what restrictions must be expected.
In the context of the Green Deal, the EU's tightened targets on the path to climate neutrality envisage a reduction in CO2 emissions of 55% by 2030 and 100% by 2050. Against the background of these tightened parameters, the question arises as to the impact on the energy transition in Germany. Based on its energy system model REMod, Fraunhofer ISE has calculated the consequences of the new EU targets for the expansion of renewable energies in Germany and now presents the results in a short study.
In February 2020, Fraunhofer ISE presented the study "Pathways to a Climate-Neutral Energy System - The Energy Transition in the Context of Societal Behaviour", which investigated the influence of societal behaviour on possible transformation paths of the German energy system towards an almost complete reduction of energy-related CO2-emissions in the year 2050. The calculations carried out with the REMod energy system model were based on the targets set by the German government at the time of preparation, i.e. a reduction in German CO2-emissions by 55% in 2030 and 95% in 2050 compared to 1990.
In response to the tightening of the European targets from 40% to 55% by 2030, which has now been implemented as part of the European Green Deal, the Institute has recalculated. The transformation paths for Germany considered in the February study were revised with a view to reducing Germany's CO2-emissions of 65% in 2030 and complete climate neutrality of the energy system in 2050. The scientists from Freiburg recalculated all scenarios of their study from February (reference, insistence on conventional technologies, unacceptance of large infrastructure measures, sufficiency). As an additional aspect, they added an investigation of the sensitivity for import prices of green hydrogen and synthetic fuels. The short study mainly considers the reference scenario in order to be able to go into more detail on the changes caused by the target tightening. However, the study also identifies corridors for the expansion of a variety of technologies that can be derived from different scenarios. In the case of photovoltaics and wind, annual additions of 10-14 GW and 9 GW respectively are required by 2030 in order to achieve sufficient CO2-free electricity for Germany.
"The update of our energy end-use study shows that achieving the climate protection targets, even with a greater reduction in greenhouse gas emissions than previously assumed, is feasible from a technical and systemic point of view, albeit with greater efforts," says Dr Christoph Kost, head of the Energy Systems and Energy Economics Group and author of the short study. "A target tightening of energy-related CO2-emissions leads to a higher direct or indirect use of renewably generated electricity in the consumption sectors. This in turn requires a much greater expansion of wind and solar power generation facilities." Furthermore, the short study shows that the expansion of fluctuating renewable energies requires a strong expansion of system flexibility.
If we want to achieve a reduction in CO2emissions by 65% by 2030, battery-electric vehicles must account for 30-35% of passenger transport in the mobility sector, for example. In a climate-neutral energy system by 2050, conventional internal combustion engines will be virtually eliminated from passenger car transport as well as from freight transport.
"Heat pumps - used in households or to supply district heating networks - must become a key technology for heat supply with immediate effect," says Institute Director Prof. Dr. Hans-Martin Henning, summarising the results for the building sector. With a view to the CO2-avoidance costs, he adds: "The tightening of the target used here leads to an increase in CO2-avoidance costs. However, these depend to a large extent on the development of final energy demand."
Link to the study "Pathways to a climate-neutral energy system - The energy transition in the context of societal behaviour", February 2020, update December 2020:
This is the first systematic evaluation of property ownership in Berlin and the various business models behind it. It opens the black box of large private property owners, about whom little has been known until now. The study describes hitherto unknown owners with more than 3,000 apartments as well as those who are below this threshold and about whom little is known so far.
"The study dispels the myth of the nice little private landlord as the main player in the real estate market, as well as the myth that selling condominiums to owner-occupants under current conditions contributes to social security and affordable housing," says study author Christoph Trautvetter, head of the Rosa Luxemburg Foundation's "Who owns the city?" project.
The uninterrupted price increases on the housing market bring the owners immense unearned returns of sometimes more than 20 percent a year. The study also compares business figures and practices of listed housing companies with their state-owned and cooperative counterparts.
"The sell-out of the city continues, although politically, especially by the Red-Red-Green Party, it is being resisted: for example, through the municipal right of first refusal, but also through the scandalisation of share deals and initiatives for more transparency. In the real estate market, both financial resources and access to information are very unevenly distributed. With its study on the disclosure of the ownership of real estate in Berlin, the Rosa-Luxemburg-Stiftung is doing important political education work and is thus providing actors with the tools they need to inform themselves and defend themselves against the sell-off of their city," says Daniela Trochowski, executive director of the Rosa-Luxemburg-Stiftung.
The trial will be held on November 10, 2020 at 6:00 p.m. via Livestream will be presented. Participants: Christoph Trautvetter (author of the study, project leader "RLS-Cities - Who owns the city?"), Daniela Trochowski (executive director of the Rosa Luxemburg Foundation), Carsten Schatz (co-chair of the parliamentary group DIE LINKE in the Berlin House of Representatives), Rouzbeh Taheri (representative of the IniForum Berlin and spokesperson for "Expropriating Deutsche Wohnen and Co"). Stefan Thimmel (Housing and Urban Policy Officer at the Rosa Luxemburg Foundation) will moderate.
Tenants can also contact www.wemgehoertdiestadt.de can dive into the data of the research with just a few clicks. The website contains further data on the owners presented in the study and on more than two hundred other players in the Berlin real estate market. It thus makes it easier for tenants to search for further clues about the homeowners on the basis of their address or the company they know.
Source: Rosa Luxemburg Foundation PM of 10.11.2020
The tender "City of the Future - On the Way to Plus-Energy Quarters". builds on previous experiences from the research programme specific focal points and R&D services. All actors who deal with research and development issues related to buildings, neighbourhoods and cities and who want to meet the new challenges of digitalisation in the building sector, the realisation of plus-energy neighbourhoods and the development of innovative urban greening technologies can submit proposals.
Within the framework of "City of the Future", the following are available for the 7th call for proposals around € 8.3 million available. The tender runs until 30.01.2020.
The guiding themes of the "City of the Future" are:
Sustainable energy system
Reduction of climate impact
Increasing competitiveness
However, factors such as liveable city, attractive business location or green space design must also be taken into account.
The subsidies are divided into 3 Tendering priorities with the following subtopics:
Tender focus 1 - Digital planning, construction and operation
1.1 Digital planning, construction process and operations management
1.2 Digital (construction) data management and data acquisition
1.3 Intelligent technologies and usage scenarios
1.4 Innovation Lab "Digital Planning, Building and Operating
Tender focus 2 - On the way to a Plus-Energy-Quarter
2.1 Technological developments on the way to the Plus Energy Quarter
2.2 System integration and combination on the way to a Plus-Energy-Quarter
2.3 Demonstration buildings and quarters
2.4 Innovation laboratory "Promoting interoperability in the smart energy system".
3.1 Reducing urban heat islands and summer overheating
3.2 Multifunctional Wall, Roof and Facade Systems for Greening
3.3 Application and impact of innovative urban greening technologies
The municipal council of the city of Wels has adopted a declaration on passive house construction. In it, the municipal council is instructed to strive for the energy-saving passive house standard in all new buildings and renovations of the city and municipal enterprises. This resolution, which was passed unanimously, was apparently inspired by the city of Frankfurt a.M., which, according to current political decisions, will only build according to the passive house standard in the future.
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