Harjavalta is a 6 MW oil power plant in Satakunta, Finland. It is operated by Suomen Teollisuuden Energiapalvelut - STEP Oy. Based on its capacity (estimated), it can supply roughly 4.7k homes (estimated). It ranks #144 of 203 Finland power plants by installed capacity. Its annual emissions of 13,993 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 3.3k cars driven for a year. In context, oil supplies about 2.3% of Finland's electricity; the national grid averages 57 gCO₂/kWh (96.3% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1002330.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and fuel fields on this page are source-record values from the upstream open dataset. They are useful for identification and ranking, but they have not been upgraded to a 2026 registry/GEM-location verified value.
capacity: WRI Global Power Plant Database source-record (legacy); fuel: WRI source-record fuel
At 6 MW, Harjavalta is below the median oil plant in Finland (52 MW). Oil-fired plants burn heavy fuel oil or diesel, usually as peaking or backup capacity on islands and grids without gas pipelines; high fuel cost keeps their utilisation low.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per EU ETS verified (EUTL 2023) (measured for US EPA/EU ETS, modelled for Climate TRACE).
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Suomen Teollisuuden Energiapalvelut - STEP Oy.
This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 61.3°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 101% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 94/100 — this site sits in the top third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
The #16 largest oil power plant of 17 in Finland by capacity.
Finland has 17 oil power plants in this dataset, together about 1,442 MW of capacity.
Coordinates 61.3167, 22.1333 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Harjavalta is a 6 MW source-record oil power plant in Satakunta, Finland.
Its output is enough to supply roughly 4,730 homes (estimated).
Harjavalta is operated by Suomen Teollisuuden Energiapalvelut - STEP Oy.
Harjavalta has measured emissions of about 13,993 tonnes of CO₂ per year (EU ETS verified (EUTL 2023)).
