AURO Environmental Declaration 2014 - page 26

26
0
200.000
400.000
600.000
800.000
1.000.000
1.200.000
2009
2010
2011
2012
2013
Gas
Electricity
kWh
53.595
178.203
599.405
62.528
196.004
748.480
65.505
193.877
595.185
77.415
205.414
651.572
Diesel
68.483
194.737
708.749
Energy
There are two main energy sources needed for the operation procedures: Electric
power is used chiefly for driving machinery, for lighting plant and for operating the
electronic data processing systems; natural gas is used exclusively for the heating
and process water plant and for generating steam. AURO uses green electricity
mainly from Norwegian hydroelectric power stations. The additional photo-voltaic
system on our company roof adds to this so we can say that AURO uses exclusively
electricity from renewable sources.
A condensing gas boiler with a multi-stage fan burner feeds six heating circuits
that provide static heating surfaces, air heaters and other heat consumers. Warm
water for the social environments is provided by means of a heat exchanger of
the solar installation. The supply temperature of the heating system is weather-
controlled. Warm water pipes that were not already protected against loss of heat
were insulated. 260 kW of electric power are installed in total. The agitators of the
dissolvers are the biggest single consumers with a maximum consumption of 60
kW, followed by the pearl mills, air compressors and, with about 20 % of the total
consumption, the complete lighting system.
In the year 2005, we installed the photo-voltaic system with a surface of 30 m
2
.
It produces about 2.500 to 3.000 kWh electricity per year that is directly fed-in to
the city’s power supply system. Thus AURO contributes its share to the reduction
of the use of fossile energy sources.
Chart Energy (1 m
3
of gas corresponds to 9,6 kWh; 1 litre of petrol to 10,03 kWh)
The same is true for the 21 m
2
solar panel
installation that was also installed in
2005. Combined with the new condensing
gas boiler, it provides the company with
heat. The produced heat energy of the
solar panels amounts to 400 kWh/m
2
or
ca. 12.000 kWh per year and thus spares
ca. 1.200 m
3
of natural gas.
Aerial photo of the company site
Good prospects for sustainable energy sources
Energy and raw material –
key figures
1...,16,17,18,19,20,21,22,23,24,25 27,28,29,30,31,32
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