Turku Energia has been working hard at replacing fossil fuels with renewable fuels. At the end of the year 2019, 61 % (50 %) of district heat was produced using renewable fuels. The goal is to increase the amount of renewable energy sources to 70 % by the end of the year 2020 so that the amount of coal will be only 10 % of fuels used by the end of 2020.
Origin of district heat
We are developing our energy supply via our own peak- and reserve-power plants as well as via our affiliate companies. Important steps were taken during the year toward being able to produce district heat without the use of coal. An affiliate company of Turku Energia, Turun Seudun Energiantuotanto Oy (TSE), built a flue gas condenser to be used at the multi-fuel power plant at Naantali, increasing the plant's energy production without needing to increase its use of fuels. Besides that, Turku Energia has also applied for an action permit in the autumn of 2019 in collaboration with Turun Seudun Energiantuotanto Oy to drill two approximately 7,000 m deep heat wells in the Koroinen area for a geothermal plant. The final decision about building a geothermal plant will be made after the first geothermal plant by St1 has been built and is in operation in Espoo.
Most district heat is produced at the Naantali power station, Oriketo biothermal plant and Kakola heat pump plant. During peak loading times in freezing winters and when there are disturbances in the operation of the base generation plant, pellet and oil-fired heating plants are used as well. In addition, Turku Energia procures about 5% of the total district heating requirement by procuring heat from its partners and customers that is generated using bio-fuels and waste heat.
Fuels for heat procurement 2019
Supply and specific emissions 2019
Heat specific emissions / energy sold 137 kgCO2/MWh (calculated by using the benefit distribution method)
District cooling specific emissions / energy sold 0 kgCO2/MWh (district cooling energy supply consists of green electricity only)
Origin of electrical energy
The distribution of origins was calculated on the basis of the national residual mix reported by the Finnish Energy Authority and the guarantees of origin obtained by Turku Energia. The national residual mix for 2019 has not yet been published, this information will be updated in 2020. This describes the situation in 2018.
The residual mix contains electricity generated by fossil fuels and nuclear power as well as its share of renewal electricity-based electricity, which has not been sold separately with guarantees of origin.
In 2018, the CO2 emissions from electricity sold by Turku Energia were 146 g/kWh on average. The amount of nuclear fuel used on average in Finland in 2018 was 0.63 mg/kWh.