Carbon dioxide emissions decreased

During the operating year, the carbon dioxide emissions of energy production were 3.3 million tonnes and the specific emissions 250 g CO2/kWh. The emissions in Helsinki decreased by, approximately, 5%, compared to the previous year, thanks to the decreased fuel consumption.

Carbon dioxide emissions

g C02/kWh

 g C02/kWh
2009 260
2010 260
2011 250
2012 250
2013 250

Supplied energy

GWh/year

 Total energy supplied
2009 13970
2010 14970
2011 13900
2012 13940
2013 13570

Specific carbon dioxide emissions

ktC02

 kt
2009 3500
2010 3700
2011 3300
2012 3400
2013 3300

During the year’s 1990 international comparison, the carbon dioxide emissions in the Helsinki region were 3.4 million tonnes and the specific emissions 400 g CO2/kWh.

Decrease of acidifying emissions

The emission restrictions of acidifying emissions and particulate emissions will become stricter due to the EU legislation in 2016. We have been preparing for this by renewing the technology in our power and heating plants. The decrease in the amount of sulphur dioxide and nitrogen oxides was thanks to our long-term work.

Acidifying emissions

tons/year

 Sulpfur dioxideNitrogen oxide
2009 2040 5140
2010 2490 5640
2011 1950 4460
2012 2370 4420
2013 2240 3890

 

mg/kWh

 Sulphur dioxideNitrogen dioxide
2009 170 390
2010 180 390
2011 170 350
2012 180 330
2013 180 300

Increase of particulate emissions

The particulate emissions increased slightly, but remained below the emission limits. Impacts on air quality are the lowest for decades

Particulate emissions

tons/year

 Particle emissions
2009 110
2010 120
2011 120
2012 120
2013 130

 

 mg/kWh 

 Particle emissions
2009 10
2010 10
2011 11
2012 9
2013 10

Impacts on air quality are the lowest for decades

Based on the measurements of the Vallila station, the annual average of sulphur dioxide content, which depicts the impact of energy production on the air quality in Helsinki, was the lowest for decades or even for a hundred years. In 1990, this measurement was ten times as great.

Before the era of district heating, the annual averages of sulphur oxides content in the Helsinki inner city ranged from 50 to 100 µg/m3. Currently, the content limit of air quality is 20 µg/m3.

 

Sulphur dioxide of the Vallila station

annual average

 mikrog./m3
2009 2.8
2010 2.2
2011 2.4
2012 2.1
2013 1.6

No excess heat is released into the sea water

Thanks to the high, about 90% efficiency ratio, the heat load we have impacted on sea water is quite low. In 2013, 250 GWh of heat, approximately 1.9% of all used fuel energy, was released into the sea. About one third of the surplus heat released into the sea occurred due to the district cooling. The load has ranged between 180 and 2,200 GWh during the 21st century.

Fly ash into concrete

The utilisation of fly ash in the production of concrete was continued and 58% of the ash was used. The remainder of the fly ash was used for filling mine caves, mixed with the flue gas desulphurization end product. Bottom ash was mainly delivered to the intermediate storage at Vuosaari to await utilisation as landfill material.

By-products

Fly ash

 %
Fly ash into concrete 58
End use 42

Bottom ash

 %
Utilization 12
The interim storage 88
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