BMW 2006 Annual Report Download - page 183
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43
Focus: Assuming responsibility
>>03
Innovative energy-saving projects
at the BMW Group locations. Groundwater is piped about four-and-a-half kilo-
metres to the BMW Group’s Research and Innovation Centre (FIZ) in the north
of Munich. The water comes from drains for the underground railway.These
drains consist of an underground system of pipes which ensures that the
water flows at right angles to the underground railway track.This groundwater
cooling system, used to cool parts of the Research and Innovation Centre,
makes conventional refrigerating machines largely superfluous and thus saves
electricity consumption of around 8,000,000 kWh a year,
which is equivalent
to the annual
electricity consumption of more than 3,000 private households
in Munich. Annual emissions
of CO2are reduced by around 5,000 tons
.
The
BMW Group carried out this project in cooperation with the Munich City Utilities
(SWM). The use of groundwater to cool buildings in this way and on this scale
is unique.
Another continent, another approach
In May 2006, the
BMW
plant in Spartanburg, South Carolina, United
States, began using methane gas to power its paint shop. The gas is generated
by the biological degradation of waste at a landfill15 kilometres away.The
BMW plant in Spartanburg is thus using a previously wasted energy source
and at the same time reducing impacts on the environment. The results: the
BMW
plant in Spartanburg acquires around 63% of its energy from methane
gas. Consequently, CO2emissions will decrease by 58,724 tons a year – this is
equivalent to the heating energy requirements of15,337 American households.
At the same time, the plant’s annual energy costs will fall by a six-digit euro
amount.
01 Process cooling system
02 Heat exchanger
03 Return water
04 Supply water
05 Water-bearing stratum
06 Groundwater flow direction
07 Impermeable stratum
08
Groundwater drain structure
The BMW Group’s Research and Innovation Centre
U-Bahn (underground railway)
02
01
0403
06
07
05
08