ACECA GRUPO 4 is a 759 MW gas power station in Castille-La Mancha, Spain. It is operated by GAS NATURAL FENOSA GENERACION S.L.U.. Based on reported annual generation of 1,679 GWh, it can supply roughly 480k homes. It ranks #44 of 899 Spain power plants by installed capacity. Commissioned in 2006, it is around 20 years old — relatively modern. Its annual emissions of 357,809 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 83k cars driven for a year. In context, gas supplies about 21.6% of Spain's electricity; the national grid averages 154 gCO₂/kWh (74.6% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1006159.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The public capacity above is the current source-record value. A 2026 tracker candidate lists 373 MW for Aceca 4 power station, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).
Capacity claim grade: B_SCOPE_PARENT_COMPLEX - recommended action: build_parent_complex_model - confidence: not_comparable_without_scope. This follows a claim-based data model: value + scope + source + confidence, rather than silently overwriting records.
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 759 MW, ACECA GRUPO 4 is well above the median gas plant in Spain (54 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.
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).
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Operated by GAS NATURAL FENOSA GENERACION S.L.U.. All plants by this company →
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a cold semi-arid steppe climate (Köppen BSk) — Northern Hemisphere, latitude 39.9°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 31% below 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: 38/100 — 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.
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 benign, low-corrosion environment (estimated ISO 9223 class C1 — Very low), with dust abrasion 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 #26 largest gas power plant of 95 in Spain by capacity.
Spain has 95 gas power plants in this dataset, together about 32,018 MW of capacity.
Coordinates 39.9427, -3.8548 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
ACECA GRUPO 4 is a 759 MW source-record gas power plant in Castille-La Mancha, Spain, commissioned in 2006.
ACECA GRUPO 4 generates about 1,679 GWh of electricity per year.
Its output is enough to supply roughly 479,600 homes.
ACECA GRUPO 4 is operated by GAS NATURAL FENOSA GENERACION S.L.U..
ACECA GRUPO 4 has measured emissions of about 357,809 tonnes of CO₂ per year (EU ETS verified (EUTL 2023)).
