SAINT-GHISLAIN STEG is a 350 MW gas power station in Wallonia, Belgium. It is operated by Electrabel NV/SA [100%]. Based on reported annual generation of 1,060 GWh, it can supply roughly 303k homes. It ranks #19 of 95 Belgium power plants by installed capacity. Commissioned in 2000, it is around 26 years old — long-established. Its annual emissions of 371,971 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 87k cars driven for a year. In context, gas supplies about 21.5% of Belgium's electricity; the national grid averages 150 gCO₂/kWh (72.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1002267.
Data status
Known data
Calculated from dataset
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000400033; fuel: WRI GPPD
In context: how this plant compares
At 350 MW, SAINT-GHISLAIN STEG is well above the median gas plant in Belgium (128 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG); GE Vernova: MS9001FA-50 Hz. 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.
371,971 t CO₂/yr — in everyday terms
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).
Key facts
- Load factor
- 35%, from 1,060 GWh of reported generation; the median for 9 gas plants in Belgium that report generation is 58%
- Generation trend
- 1,333 GWh in 2015 and 1,060 GWh in 2017 (−21%)
- Highest and lowest year
- 2015: 1,333 GWh; 2017: 1,060 GWh
- Share of Belgium gas capacity
- 3.9% of 8,938 MW across 35 plants in this dataset
- Age among peers
- 10 of 21 dated gas plants in Belgium 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 Electrabel NV/SA [100%].
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 temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 50.5°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 17% 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: 59/100 — this site sits in the mid 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 moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness 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 #12 largest gas power plant of 35 in Belgium by capacity.
Belgium has 35 gas power plants in this dataset, together about 8,938 MW of capacity.
Nearby power plants
- Incinerateur THUMAIDE (IPALLE) · Waste · 32 MW · Wallonia
- Windvision Estinnes WIND · Wind · 81 MW · Wallonia
- Maubeuge · Solar · 10.62 MW · Nord-Pas-de-Calais
- Valenciennes · Solar · 1.3 MW · Nord-Pas-de-Calais
- Pont-sur-Sambre · Gas · 450 MW · Nord-Pas-de-Calais
- Sepmeries · Wind · 2 MW · Nord-Pas-de-Calais
Location
Coordinates 50.4719, 3.8248 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is SAINT-GHISLAIN STEG?
SAINT-GHISLAIN STEG is a 350 MW gas power plant in Wallonia, Belgium, commissioned in 2000.
How much electricity does SAINT-GHISLAIN STEG generate?
SAINT-GHISLAIN STEG generates about 1,060 GWh of electricity per year.
Who operates SAINT-GHISLAIN STEG?
SAINT-GHISLAIN STEG is operated by Electrabel NV/SA [100%].
How much CO₂ does SAINT-GHISLAIN STEG emit?
SAINT-GHISLAIN STEG has measured emissions of about 371,971 tonnes of CO₂ per year (EU ETS verified (EUTL 2023)).