Multiple sources and three grids for new and existing buildings
The Mittenheim Quartier (MiQ) is located in the north of Munich in Oberschleißheim. There are already some existing buildings on the site, such as workshops. The neighbourhood is to be expanded to include new residential buildings and a daycare centre.
The project is divided into five construction phases and the energy supply is to be as renewable as possible. Due to the different uses and building statuses (new build/residential - existing buildings/workshops - new build/daycare centre), the decision was made to use several heating networks with different temperatures.
Details
In the 1st construction phase, 16 new residential buildings are supplied via a cold network. The anergy comes from the groundwater, from suction and absorption wells. The heat and cold is transferred to the network via a technical centre with a heat exchanger and distributed in the district, where it can be consumed in the houses using heat pumps. The construction management phase has already begun with the test drilling of wells. The cold local heating network is planned with a length of approx. 950 metres; a total of 1.7 km of pipelines including the suction and absorption wells will be installed.
In the 2nd construction phase, a low-ex network (40°C) will ensure that a day-care centre (new building) and some new semi-detached houses to be built are heated and supplied with hot water. The anergy for this also comes from the groundwater and is tapped via suction and absorption wells.
Both construction phases also utilise PV.
In the 3rd construction phase, an existing hot water network for existing workshops will be converted and in future will be supplied by pellet heating instead of fossil fuels.
The 4th construction phase is currently being planned. Groundwater heat pumps with 2 x 180 kW heating capacity are planned here. These will replace the gas boiler in an existing warm network. The challenge: the refurbishment must be carried out during ongoing operations in order to ensure that the residents of the hall of residence can be supplied by a central kitchen.
In total, goodmen energy was responsible for planning the networks, the sources, 16 building technology centres and three energy technology centres in this project.
You can find more details on this project in the Pfalzwerke report (external link).
