42279 Wuppertal: The exhibition with 19 show houses in the "Efficiency House Plus" building standard on the 18,000 square meter site is a model project of the prefabricated construction industry for the development of energy-efficient settlements, sponsored by the BBSR. All model houses are networked with each other and have a central storage battery so that energy can be generated, stored and distributed collectively. Completion: 2013
Location: Schmiedestraße 59, 42279 Wuppertal-Oberbarmen
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With the help of photovoltaic systems, the houses generate more energy than their residents would consume. The entire neighborhood remains connected to the public power grid, to which energy can be supplied or drawn from as needed. Sensors in the houses measure the energy flows. The Fraunhofer Institute for Building Physics is conducting scientific monitoring to compare the different degrees of self-use and self-sufficiency of various storage concepts. The project is funded by the Federal Ministry of Building, represented by the Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR).
The solar power generation of the buildings is realized with different photovoltaic modules, which are mainly designed as rooftop installations. In the process, 37 percent of the solar cells are made of monocrystalline silicon and 58 percent of polycrystalline silicon. In one project, CIS (copper indium diselenide) solar cells are integrated into the facade. A total of 175.9 kWp PV systems were installed.
CellCube" district electricity storage system
Since September 2017, a district-central electricity storage system with a capacity of 130 kWh has been in operation, which increases the degree of self-use of the settlement. A vanadium redox flow battery from the manufacturer Gildemeister Energy Solutions type FB 10-40 is used as battery storage. By means of an upgrade, the battery can be charged or discharged with a nominal power of 30 kW and has a capacity of 130 kWh, whereby the discharge energy (AC) is limited to 104 kWh. The battery storage is located outdoors near the reception building. The storage is charged in the current control mode as soon as this value reflects a feed-in to the public grid and discharged when there is a draw from the public grid. The charging and discharging power is adjusted in such a way that the storage unit does not feed into the public grid or draw from the public grid in the ideal case. According to measurements by FhG IBP, the public grid was relieved of 14 percent of its load by the neighbourhood electricity storage system, based on the electricity drawn.
An initial result of the decentralised mutual power supply is that, thanks to the ring line, all the houses together had to draw around 30,000 kilowatt hours or 15 percent less electricity from the public grid in the period from mid-February 2016 to the end of May 2017 than would have been the case without the neighbourhood power grid. As a result, the public grid was relieved and 20 percent more of the energy generated in the settlement from renewable energy sources was used by the residents themselves. Calculations by Fraunhofer IBP on the cost-effectiveness of such a decentralized power supply show that the costs for a neighborhood solution are hardly higher than for comparable Efficiency House Plus buildings without connection to a ring circuit.
To evaluate the building energy balances, three measurement periods (measurement period one year each) are evaluated. Both the self-consumption of PV electricity (value range 14 percent to 45 percent) and the degree of self-sufficiency (value range 19 percent to 38 percent) of the individual houses averaged just under 30 percent over the entire measurement period. Self-consumption decreases slightly over the measurement period due to the energy-saving measures and, in some cases, additionally installed PV surfaces.
Furthermore, the efficiency of the heat pumps used was monitored. This is because more than 80 percent of all prefabricated houses are equipped with heat pumps (source: PM BDF 9/2018).
All houses are realized in timber construction
Forschungsinitiative Zukunft Bau - BBSR (2019): Praxis-Vergleich verschiedener Speicherstrategien für Plusenergiehäuser in exemplarischen Wohnsiedlungen - Living Lab Plusenergiesiedlung Wuppertal.
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Prefab World: www.fertighauswelt.de/...wuppertal.html
Last Updated: February 18, 2021
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All project/s of the planning office: ; City region: Wuppertal and surrounding area; Country: Germany; Characteristics: 01 - 02 Floors, Single-family house; Thematic: View or try out, Photovoltaics, Wood construction, Model settlement, PlusEnergyHouse, Plusenergiesiedlung, Electricity storage