Germany: Multi-Family Houses Achieve High Yields
|
Project |
8 Gerberstraße, Halberstadt |
8-19 Kastanienplatz, Querfurt |
|
Flats |
72 |
95 |
|
Heated floor space |
4,622 m² |
5,042 m² |
|
Backup heat source |
District heating |
District heating |
|
Collector area |
63 m² |
50.4 m² |
|
Collector area per flat |
0.88 m²/flat |
0.53 m²/flat |
|
Solar yield in 2013 |
33,983 kWh/a |
29,557 kWh/a |
|
Specific solar yield in 2013 |
539 kWh/m²a |
586 kWh/m²a |
|
Solar share of hot water and |
7 % |
6 % |
|
Volume of solar buffer tank |
3,000 litres |
2,000 litres |
What is most noticeable is the relatively low solar share, which is one of the key factors for the high specific yield. The second one is the solar heating control system Juri Maxx, which provides the link between the conventional heating system and the solar circuit. This prefabricated and fully wired hydraulic grid is equipped with a DDC controller and a modem, enabling the Parabel team to gain access to the Juri Maxx either through a phone or an internet connection. The online monitoring system detects any defects immediately. “The most important alarm settings are a drop in collector circuit flow or a drop in temperature, either in the hot water or in the space heating circuit,” company founder and Managing Director Bernhard Jurisch explains. Daily logs allow the company to evaluate the performance of the control system.
Heart of the heat supply: The Solar Heating Manager (SEZ in the graphic), for example, type Juri Maxx, controls the different hydraulic circuits.
