Renewable Energy – Solutions for application in the communal energy infrastructure

EXAMPLE PROJECTS |
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Germany: Solar heat network of old and new buildings
Two solar thermal systems with a total of 76 square metres of collectors provide heat for the parish centre and the residential building.
In Zwiesel, Bavaria, Germany, planners have come up
with a smart concept to supply an old building and a new
building in a heating network with two solar thermal
systems. The parish owns two buildings; the parish
house had already seen extensive thermal renovation
work in 2006. In 2010, the parish built a modern,
energy- saving building in place of the old parish centre
next door. It houses a lecture room, additional group
rooms, a kitchen and sanitary facilities. Previously, the
200-kilowatt boiler had consumed 25,000 litres of oil a
year; the new parish centre is heated exclusively with
solar heat and wood. The 60-kilowatt pellet boiler only
heats when the sun’s energy is not sufficient.
The solar thermal systems cover 60 per cent of the heat demand
in the parish centre – emission-free.
For this purpose, 36 square metres of solar collectors
were mounted on the southeast façade, plus a further
40 square metres of free-standing solar thermal collectors
located beside the main buildings. The systems
cover 60 per cent of the heat demand in the new parish
centre, which shares solar heat with the five-storey
parish residence. The control system ensures that the
solar heat is utilised optimally. As a result, both buildings
are able to cover about 40 per cent of their heating
needs emission-free from the solar systems.
The project was planned and realised by, among others,
the architectural office Löw and the engineering office
Hilz from the Bavarian town of Zwiesel, as well as the
building services company Wölf in the municipality of
Bodenmais.
The solar heat is optimally distributed to both buildings.