With more than 1,700 realised buildings, SolarActiveHouses are no longer a marginal phenomenon. What has been missing so far is a scientific evaluation of this heat supply concept. To this end, researchers have measured nine solar houses over several heating periods. The responsible project manager Gerhard Stryi-Hipp presented the interim results at the OTTI symposium "Thermal Solar Energy".
Read more in the BINE-Projektinfo from 13.05.2015
(BINE-Info was discontinued at the end of 2020)
With a very large majority, the municipal council decided on 22.07.2021 to initiate the urban development measure (SEM) "Nördlich Hafner". The development statute provides the project with a binding legal framework for the city of Constance and the remaining property owners in the area. The decision is also the conclusion of the preparatory studies (VU) that have been running for about four years, in which not only various subject-related studies and the urban development framework plan were developed, but also a comprehensive timetable and a detailed cost and financing overview were drawn up. In total, the development of the approx. 106 ha large area (of which around 60 ha settlement area) including all technical and social infrastructures (e.g. day-care centres, primary school). In the end, income from the allocation of land will result in a largely balanced overall balance.
"With the results of the preparatory studies, valuable foundations have been laid for a speedy development of the area and thus for the creation of affordable housing and commercial space. Even though major tasks still await us in the coming years: Now the development of the Hafner can really take off. I am looking forward to the further joint process of developing the new district for and with the people of Constance," says Construction Mayor Karl Langensteiner-Schönborn.
The development of the first construction phase could begin from the end of 2025, and the completion of all development measures in the third and final construction phase is planned for 2038. Until then, there are still many planning steps to be taken: Further owner discussions and negotiations (with the aim of acquiring the plots or a binding participation of the owners), the further development of the framework plan, in-depth expert opinions, the preparation of development plans as well as the development of an allocation concept for plots are only some of the tasks. For all those involved and interested, there will also be many opportunities in the coming years to inform themselves about the further process and to participate.
In 2016, the municipal council decided that preparatory studies for an urban development measure should be carried out for the Hafner area. After these were completed in May 2021, the project now reaches an important milestone with the consultations on the resolution of a development statute in July 2021.
Over the past four years, the city administration, together with external experts, has investigated the prerequisites for implementing an urban development measure in the area: from a planning, temporal, economic and property rights perspective. The preparatory studies have come to the conclusion that the urban development framework plan for the area, which was adopted by the municipal council at the end of 2019, can be implemented. "The important foundation for a rapid development of affordable housing and commercial space in the Hafner area - over 3,000 residential units and 15 ha of commercial space - has thus been laid," says Mayor Karl Langensteiner-Schönborn.
In contrast to traditional models of building area development, the instrument of urban development measures offers the possibility to prevent land speculation, to involve the owners in the development and to handle and finance the social infrastructure needs in the area through the measure. The instrument distributes obligations and rights fairly between the owners and the common good: investment costs are not socialised and development profits are not privatised, but reinvested for development.
The resolution of a development statute now sets the corresponding legal framework for the development. It is also the starting signal for the next steps in the development process. At the end of 2021, the decision to draw up the development plan for the first construction phase is to follow, and from 2024, the allocation of plots to WOBAK, housing cooperatives, building associations and other developers is to begin via concept procedures. Development of the first construction phase is expected to begin at the end of 2025.
Electricity from the sun and wind is too expensive? Wrong: according to new studies, green electricity is cheaper than fossil energy worldwide and in Germany.
Since 2009, prices for wind power have fallen by a third, for solar power by 80 per cent and in the next decade, solar power is set to become a further 60 per cent cheaper. 170 countries now have targets for renewables, and large financial investors are looking for these secure plants. Electricity storage systems are also expected to be 65 per cent cheaper by 2020 and their capacity is set to multiply from 1 to 250 gigawatts. And the rival authority IEA, the International Energy Agency of the OECD, which for years tried to talk down renewables, now sees similarly rapid growth and falling prices.
Extreme weather events such as heat waves, heavy rain, floods and storms do not stop at property boundaries. That is why adapting to the consequences of climate change is an issue for everyone - for politicians and administrators who are responsible for protecting public space, as well as for every private owner and tenant. It is also the task of cities, municipalities and districts to inform their citizens about possible dangers in this context and to point out solutions. The "Practical Guide to Climate-Friendly Building" provides support in this regard.
On 29 November, the topping-out ceremony took place in Quartier Weißensee with the project participants and future residents.
Further information on what will soon be Germany's largest timber housing estate with 213 residential units: http://sdg21.eu/db/weissensee
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With more than 1,700 realised buildings, SolarActiveHouses are no longer a marginal phenomenon. What has been missing so far is a scientific evaluation of this heat supply concept. To this end, researchers have measured nine solar houses over several heating periods. The responsible project manager Gerhard Stryi-Hipp presented the interim results at the OTTI symposium "Thermal Solar Energy".
