Vuosaari A is a 163 MW gas power station in Uusimaa, Finland. It is operated by Helsingin Energia. Based on reported annual generation of 1,556 GWh, it can supply roughly 444k homes. It ranks #22 of 203 Finland power plants by installed capacity. Commissioned in 1991, it is around 35 years old — long-established. In context, gas supplies about 1.2% 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 WRI1002593.
Data status
Known data
Calculated from dataset
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Capacity provenance
The public capacity above is the current source-record value. A 2026 tracker candidate lists 648 MW for Vuosaari power station, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 163 MW, Vuosaari A is well above the median gas plant in Finland (120.6 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Generation trend
- 2,938 GWh in 2015 and 1,556 GWh in 2017 (−47%)
- Highest and lowest year
- 2015: 2,938 GWh; 2017: 1,556 GWh
- Share of Finland gas capacity
- 7.3% of 2,246 MW across 20 plants in this dataset
- Age among peers
- 3 of 7 dated gas plants in Finland are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Reported generation trend
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Helsingin Energia. All plants by this company →
Local climate & thermal context
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 60.2°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 93% 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: 92/100 — this site sits in the top third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~0% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).
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.
Site climate & environmental severity
This site sits in a corrosive environment (estimated ISO 9223 class C4 — High), with marine corrosion the leading environmental stress.
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.
How it compares & nearby plants
The #5 largest gas power plant of 20 in Finland by capacity.
Finland has 20 gas power plants in this dataset, together about 2,246 MW of capacity.
Nearby power plants
- Vuosaari B · Gas · 485 MW · Uusimaa
- Vuosaari power station · Coal · 648 MW ·
- Hanasaari B · Coal · 212 MW · Uusimaa
- Kellosaari · Oil · 120 MW · Uusimaa
- Salmisaari B · Coal · 163 MW · Uusimaa
- Martinlaakso · Gas · 171.7 MW · Uusimaa
Location
Coordinates 60.2199, 25.1692 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Vuosaari A?
Vuosaari A is a 163 MW gas power plant in Uusimaa, Finland, commissioned in 1991.
How much electricity does Vuosaari A generate?
Vuosaari A generates about 1,556 GWh of electricity per year.
Who operates Vuosaari A?
Vuosaari A is operated by Helsingin Energia.