Energy-positive Buildings
Modern power supply systems are designed so that the consumer does not control them. Electricity is produced centrally and comes to apartments and non-residential buildings "from the outside". With this approach to energy supply, electricity is produced in two ways. The first one is to generate electricity from non-renewable energy sources in large power plants, which leads to increased CO2 emissions. The second one tries to solve this problem with the help of renewable energy sources. However, renewable energy sources require significant sites for the equipment. In addition, industrial consumers are not concentrated in areas with high energy potential. Rocky seashores or areas with a large number of sunny days per year (a prime example of the Sahara), as a rule, are uninhabited.

Now let's imagine a city when energy is generated by the buildings themselves. Smart energy sources can be a part of the city's architecture. This practice is really effective and aesthetic. And architectural bureaus (for example, in Germany) are already actively engaged in the creation of energy-positive buildings.
Universal Problem
Modern energy supply systems are either extremely wasteful (CO2 emissions), or too complex and expensive, and demand large spaces for energy production and renewable sources. Or both at the same time. The centralization of electricity production and its delivery does not allow for quick and easy implementation of energy-positive solutions.
An approach is based on the installation of renewable energy sources into the architectural structure of the building. This makes it possible to reduce the territory used for the installation of equipment and provide clean electricity not only to the energy-positive building itself, but also to neighboring buildings. Thus, the creation of an energetically autonomous city is real.
Target Image
In the future, the electricity production structure will be stable and self-sustaining. City residents will live comfortably in energy-positive buildings. The technologies will not interfere with urban lives. In addition, the system will operate with all available alternative energy sources. It allows consumers to distribute energy.
Experiment Framework
As part of the practice of energy-positive buildings, the maximum achievable reduction in specific energy consumption in different modes are investigated. Practice is studying how the building uses seasonal large or small loads. It is studying the capacity of its own energy sources and the generated electricity they provide, the possibility of reducing the carbon footprint and the maximum autonomy time.

The test site is Freiburg im Breisgau in German is named a "city of the sun". It is recognized as the capital of solar energy. Solar panels are built in the roofs of many houses in this city.

One of the most important test sites for practicing energy-positive technologies is the Smart Green Tower. It will have office space and public spaces, and residential apartments on the upper floors. The power supply is organized on highly efficient solar panels integrated into the building facades.
Tools and Technologies
The transition to alternative energy sources is carried out due to:
  • facades and roofs are created from flexible and translucent solar panels, as well as special light-adaptive glasses;
  • solar panels can be installed on various surfaces of the building;
  • electric and thermal energy storage devices, heat pumps, intelligent air conditioning and ventilation control systems are used to accumulate and distribute electricity.
Scaling Plans
For energy-positive buildings practice architecture is a zone of constant development and implementation of new technologies.

Freiburg is home to various test sites such as Greenhouse, the Woodhouse and Pro Scholare. But the practice is actively scaled up in other countries (China, France) through the implementation of various projects.
Standards and Values
  • Variety of architecture
  • Convenience and comfort for citizens
  • Stable and self-sustaining structure
  • Sustainability and care for the environment
  • System flexibility, the ability to control and regulate it
Communities and Leaders
  • Frey Architecten is an architectural bureau that approaches cities in a holistic manner, based on 5 aspects: environmental, economic, innovative, integrative and motivating. The main focus is people and the environment.
  • Bjarke Ingels Group is a group of architects, designers, urbanists, landscape specialists who create spaces for a harmonious life of people. It is a place for all aspects: work, rest, entertainment, shopping, and most importantly - dreams that can be realized. For them architecture is a tool for changing the world.
  • Siemens Energy is a company developing projects make the transition to a sustainable energy world
  • Fraunhofer Institute is one of the leading research organizations in Europe.
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