Gas power plant in Rio de Janeiro, Brazil. Approximate location -21.84064, -41.019075.
GasRio de JaneiroBrazilCCGT · HRSGAnnounced
GNA III power station is a 1,927 MW gas power station in Rio de Janeiro, Brazil. It is operated by Prumo Logistica SA; BP PLC; Siemens Energy Brasil Ltda; SPIC Brasil SA [33%]. Based on its capacity (estimated), it can supply roughly 2.2 million homes (estimated). It ranks #18 of 2,572 Brazil power plants by installed capacity. In context, gas supplies about 7.3% of Brazil's electricity; the national grid averages 110 gCO₂/kWh (88.7% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GOGPT_gnaiii_brazil.
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: GEM GOGPT; fuel: GEM GOGPT
At 1,927 MW, GNA III power station is well above the median gas plant in Brazil (100.2 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). Its current lifecycle status is “Announced” — so it is not yet, or no longer, generating at full output. 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.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Prumo Logistica SA; BP PLC; Siemens Energy Brasil Ltda; SPIC Brasil SA [33%].
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a tropical savanna climate (Köppen Aw) — Southern Hemisphere, latitude 21.8°S — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
This site has effectively no heating season (tropical/equatorial climate), so winter heat loss is not the driver here. The thermal concern shifts to year-round process heat and humidity/heat-driven corrosion of hot equipment.
A gas turbine here also runs ~6% 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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion 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 #8 largest gas power plant of 195 in Brazil by capacity.
Brazil has 195 gas power plants in this dataset, together about 74,861 MW of capacity.
Coordinates -21.84064, -41.019075 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
GNA III power station is a 1,927 MW gas power plant in Rio de Janeiro, Brazil.
Its output is enough to supply roughly 2,170,352 homes (estimated).
GNA III power station is operated by Prumo Logistica SA; BP PLC; Siemens Energy Brasil Ltda; SPIC Brasil SA [33%].
