Focusing on Energy Efficiency Measures and Thermal Power

Stikkord: Energi i bygg, Energiforsyning, Sarpsborg

Sarpsborg Municipality has reduced greenhouse gas emissions by 21 per cent resulting from energy efficiency measures and investments in new energy plants using non-fossil fuel. The company Borregård has contributed considerably, reducing emissions with 50 per cent from 2006 to 2007.

Sarpsborg Municipality has reduced greenhouse gas emissions by 21 per cent resulting from energy efficiency measures and investments in new energy plants using non-fossil fuel. The company Borregård has contributed considerably, reducing emissions with 50 per cent from 2006 to 2007.

The great reduction of greenhouse gas emission in Sarpsborg is partly due to the closure of energy-consuming industry. But large-scale energy efficiency initiatives and changes in existing industries’ energy consumption, in particular Borregård Industries, also contribute.

Sarpsborg’s total greenhouse gas emissions were 380 000 tons CO2 equivalents in 2007, emissions from Borregård amounting to 172 000 tons or a share of 45 per cent. However, Borregård have cut their emissions by 50 percent from 2006. Reduction is due to energy efficiency initiatives, lower production rate and utilization of excess power in electric boilers.

Thermal Power Strategy

For many years Borregård have followed a thermal power strategy to reduce the use of fossil fuel. Means to this end include energy efficiency initiatives and investments in new energy plants based on none-fossil fuel. Some important initiatives over the last few years:

  • 2003: New waste energy plant, producing approx. 190 GWh of energy (cutting oil consumption by 19 000 tons annually)
  • 2004/2005: Bio fuel plant (excess production energy), producing approx 130 GWh of energy (cutting oil consumption by 13 000 tons annually)
  • 2005: Thermal energy recovery from a new SO2 plant, producing approx 45 GWh (cutting oil consumption by 4500 tons annually)
  • 2005/2008: Energy efficiency initiatives related to environmental investments, makes approx 160 GWh (cutting oil consumption by 16 000 tons annually).

Goals Reached by a Good Margin

From 1991 to 2007 greenhouse gas emissions have increased in four out of five Norwegian municipalities. In the same period, emissions in Sarpsborg have gone down 21 per cent. The municipality therefore fulfils the targets set in their own environmental plan from 2001 by a good margin. And there are additional initiatives for emission reductions yet to be realized.

A new waste energy plant is being built in Borregård (to be completed by 2009/10). The plant will create approx 200 GWh of energy and reduce oil consumption by 20 000 tons annually.

Advanced District Heating Plants

A district heating system in the city centre based on excess heat from Borregård Industries will be completed by 2013. The energy supply potential of this system is approx. 19,5 GWh. This initiative from Bio Varme Sarpsborg AS (Bio Heat Sarpsborg AS) will cut greenhouse gas emissions by an annual 8000 tons.

In Greåker/Alvim, too, a district heating plant will be developed. Heating is led from a plant based on bio fuel, using wood chippings with oil as a reserve source. The potential of the plant is 18 GWh of energy supplies, cutting emissions by an estimated 64 000 tons of CO2-equivalents per year. Østfold Energi has applied for the concession to build and run the plant.

Heating the Hospital

In Kalsnes in Sarpsborg West, a new district heating plant will supply the new hospital in Østfold. This plant has a potential of 31 GWh of energy supplies, equivalent to the consumption of 1550 houses using 20 000 kWh energy per year. Emission cuts from this plant are estimated to an annual of 4500 tons of CO2 equivalents. Østfold Energi AS has applied for the concession to build and run the plant, which will use heat pumps and biofuel.

Smart Society

Hafslund Eiendom (Hafslund Property) has entered a dialogue with Sarpsborg Municipality in order to develop a new environmentally friendly suburb in Hafslund called «Smart Society», based on life cycle assessment analysis. Both Østfold Energi and Hafslund Miljøteknikk (Hafslund Environmental Technique) have applied for the concession on district heating in Sarpsborg East granted by the NVE (Norwegian Water Resources and Energy Directorate). Sarpsborg Municipality recommends that Hafslund is given the concession, as their solution will provide approx 246 GWh in energy gains.