Modern solar and fresh water technology for maximum energy savings
Efficient preheating stage for hygienic domestic hot water
- Commissioning: 2010
- Residential units: 86
- Version: SYSO18 3-cascade FWE-50
- Pouring capacity: 116 l/min
- Storage tank design: 4 tail unit layer storage tanks 1750
- Storage volume: 7,000 l
- Preheating stage: as a flow-through drinking water heater
Preheating stage: as flow-through DHW heater
- Version: VARIO fresh-nova cascade FWE 60
- Pouring capacity: 120 l/min
- Storage tank version: 1 tail unit stratified storage tank 1,750
- Storage volume: 1,750 l
- Solar system: 110 m2 vacuum tubes
The building envelope and heating technology of the residential complex at Felix-Auerbach-Straße 18-20 in Jena were replaced as part of a complete refurbishment. The main aim was to reduce energy costs and provide hygienic domestic hot water. This was achieved with a combination of solar thermal energy to support the heating system and varmeco fresh water technology. A preheating stage is installed upstream of the fresh water heating system. This preheating stage is exclusively solar
and makes it possible to use solar energy even at a low temperature level. As the preheating also works on the flow-through principle, there is no need to heat up to 60 °C every day. This improves the energy balance.
Thanks to preheating, the specific collector yield is impressively high at around 600 kWh/(m2a).