Berlin (Germany)
Demo responsible: BoostHEAT
Type of building: Small residential. House with 2 apartments (220 m2) in the town center of Berlin. Solar energy potential: 10 m2. Existing individual gas boiler per flat for supplying Domestic Hot Water (DHW), space heating through radiators. Yearly heat demand: 60MWh,th
Demonstration action:
- TP1, Parallel integration: Solar thermal (TVP) for space heating and for domestic hot water (DHW). The heat pump boiler (BoostHEAT) will be used to cover non-solar periods.
- Solar panels installation on flat roof and connections to the cellar room
- BoostHEAT and thermal energy storage (RATIOTHERM) installation in the cellar
- Integrated control system for the smart operation of H&C
- Redesign centralized space heating and DHW distribution system for the 2 flats
- DHW and space heating meters per flat for operation costs breakdown
Replicability potential:
- Small residential (single houses) with natural gas connection. New and renovated buildings.
- All climates
Technical risks:
- Access to the cellar for integration of the 2,000 l solar storage tank: division of the storage tank into a smaller tank
- Overheating in the absence of heat demand: safety connection to the outdoor fan coil unit in the outdoor area from the BoostHEAt circuit
Difficulties encountered:
Most of the difficulties encountered are related to the fact that it is an historical building, such as
- Roof reinforcement requirements path availability for pipes, chimney and wires (roof, ceilings, limited door, stairway, and basement room dimensions for components handling and installation)
- Tilted roof integration late requirement caused the replacement of TVP high vacuum panels solution by standard solar thermal panels
- Synchronizing owner parallel renovation work with SunHorizon TP1 integration work regarding financial, design, and installation decisions
- Finding professional installers for a quite complex system integration in building in the extremely dynamic market after Covid-19 crisis
Estimated savings and impact:
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32% primary energy and GHG emissions savings
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25% renewable energy ratio
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578€/year cost bills reduction
Warning: the estimation has been done without taking into consideration the domestic hot water recycling loop because it was decided late.
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