The housing block is connected to a 185 kW wood-chips-district-heating plant. The integrated heating system was another innovative outcome of the lifecycle analysis. The system is fuelled by wood-sheets, which opposite to fossil fuels are regarded to be CO2 neutral as biomass is a natural element in the carbon cycle.
Solar panels with some 110 m² of collector area are situated on the roof and supplement the heating system. Both the solar collectors and the heat plant transfer the energy to buffer tanks in the basement, from where supply-system distributes the heat to all dwellings. In each dwelling there is a small station, situated in the bathroom, where the energy is split for the space heating into tube radiators, and for domestic hot water.
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Small station in the bathroom of each apartment that divide the heat between hot water and space heating and count the consumption |
Solar collectors on the roof |
Additionally to the heating system, there is an air-ventilation system with
heat recovery. The heat exchangers warm the incoming fresh air and are situated
above the lofts of each dwelling. Air is taken from the kitchen, bath and
entrance-hall and transferred down a shaft beside the chimneys and back into the
living and sleeping rooms at an air change-rate of 0.5/hour. Especially in cold
regions like the mountain areas of Austria, where the outside temperature in
winter often drops below minus 10 °C for weeks, opening of the windows for fresh
air cause substantial heat losses. With the air ventilation this is not
necessary.
The entire heating system, that is boilers, pumps, and ventilation fans, is
controlled and monitored by an Energy Management System (EMS). This system
includes a heat-volume-counter at the entrance from the biomass-district heating
and a heat-volume-counter in the secondary solar-circle between solar-heat
exchanger and buffer tank. The counters in the individual dwellings are not used
for the total monitoring. One of the tenants is responsible for operation and
maintenance of the heating system, and the technical section of the GSWB housing
organisation handles monitoring via computer.
General information on:
Central heating
Ventilation and heat exchange
Solar Collector Water Systems
EMS, see more at
http://www.gswb.at/sobauenwir6.html
Suppliers of technology:
Distrubution system, energy counters, and installation:
Dolschek GMBH www.dolschek.at
Dolcheck is an enterprise that provides a range of energy related services such
as establishment of solar plants, air heat pumps, central heating systems,
ventilation, sanitary installations, combined heat and power etc.
Address: A - 5541 Altenmarkt 21, Austria
Phone: +43 (0) 6452 5408 Fax: +43 (0) 6452 5408 - 15
e-mail: office@dolschek.at
Air ventilation system:
PRAEAUER
Prauer is a Austrian company that designs, supplies, and implements air
ventilation and water systems
Address: Salzburgerstraße 6, A-5600 St. Johann, Austria
Phone: +43 (0) 6412 6147 Fax: 43-(0) 6412 6147 - 39
Solar collectors:
SONNENKRAFT www.sonnenkraft.com
Sonnenkraft is situated in both Germany and Austria and offers a range of solar
solutions
Address: Resslstrasse 9, A-9065 Klagenfurt, Ebenthal, Austria
Phone: +43 (0) 4637 40550 Fax: +43 (0) 4637 40550 - 17
e-mail: office@sonnenkraft.com
Technical design:
TAP – Technische Anlagen Planung www.t-a-p.at
TAP provides technical planning and consultant services in the fields of
ventilation, heating, air condition technology, sanitary engineering, and
electric systems.
Address: Salzachtal Bundesstraße 13, A-5700 Zell am See, Austria
Phone: +43 (0) 6542 53900 Fax: +43 (0) 6542 53900 - 380
e-mail: zell@t-a-p.at