Environmental declaration for the transmission system 2008
Per heating unit sold to district heating companies:
| Power consumption |
3.22 kWh/GJ |
| Emissions: |
|
| CO2 emission |
26.69 kg/GJ |
| SO2 emission |
19.52 g/GJ |
| NOx emission |
44.27 g/GJ |
Environmental declaration for the average VEKS consumer 2008
(transmission and local district heating system). Per heating unit sold to the consumer
| Power consumption |
4.64 kWh/GJ |
| Emissions: |
|
| CO2 emission |
31.54 kg/GJ |
| SO2 emission |
11.28 g/GJ |
| NOx emission |
52.07 g/GJ |
This environmental declaration describes the product of district heating in relation to the volume of power consumption
and CO2, SO2, and NOx emissions.
The environmental declaration on district heating has been prepared in cooperation with Energi E2, Elkraft System, CTR and Copenhagen Energy.
DEVELOPMENT IN VEKS’ ENVIRONMENTAL DECLARATION
The majority of district heat is generated at Energi E2’s CHP plants and waste incineration plants in the Copenhagen area and at Vestegnen. Peak and reserve loads on the local boilers of the district heating companies are not started until the CHP plants are unable to supply enough heat, for instance during extremely cold spells.
During the past few years, emissions have dropped according
to the environmental declaration factors. One of the explanations is the increased heat generation at the waste incineration plants, to which CHP units have been added; the other is the start-up of unit 2 at Avedøre CHP Plant. The heat generated by unit 2 of Avedøre CHP Plant also had a major influence, given that this resulted in more consumption
of natural gas and biofuel – and less consumption of coal. However, power required for pumping has increased, because much of the heat generated by unit 2 is exported directly to CTR. Finally, a large part of the production at the older and less up-to-date plants has been closed down.
FUTURE DEVELOPMENT OF THE ENVIRONMENTAL DECLARATION
As mentioned earlier, the development of the environmental declaration depends on the facilities used for heat generation.
The heat distribution strategy is based on supply reliability and economy. Economic and environmental gains are interlinked and need to be preserved by lowering taxes on environment-friendly fuel and reducing costs by building new and effective production units.
Increased heat supply from Avedøre CHP Plant to Copenhagen
via VEKS’ transmission network, new units at Amager CHP Plant based on biofuel, and supply to the steam network from Amager CHP Plant make up some of the activities planned for the current year as well as the years to come.
Within VEKS’ own system, efforts are being made to optimize
peak load consumption as well as convert into biofuel at a few of the local boiler stations. These efforts will have a favourable effect on the environmental declaration.