Hydro power plant in Rio de Janeiro, Brazil. Approximate location -21.85, -42.5833.
HydroRio de JaneiroBrazilrun-of-river
Ilha dos Pombos is a 187 MW hydro power station in Rio de Janeiro, Brazil. It is operated by Light Energia SA [100%]. Based on its capacity (estimated), it can supply roughly 187k homes (estimated). It ranks #208 of 2,572 Brazil power plants by installed capacity. Commissioned in 1924, it is around 102 years old — an older, legacy facility. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 51.8% 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 BRA0001113.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and/or fuel fields on this page include a source-backed provenance label from GEM, an official registry, Wikidata, OSM, or a cross-source match.
capacity: GEM tracker 2026 (location L100000600269); fuel: WRI source-record fuel
At 187 MW, Ilha dos Pombos is well above the median hydro plant in Brazil (12 MW). Technically it is described as run-of-river. Hydropower converts the energy of falling or flowing water into electricity; output depends on rainfall and reservoir level, and large dams also provide grid balancing and storage.
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 Light Energia SA [100%].
This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a tropical savanna climate (Köppen Aw) — Southern Hemisphere, latitude 21.9°S — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 97% 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: 14/100 — this site sits in the bottom 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 corrosive environment (estimated ISO 9223 class C4 — High), 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 #82 largest hydro power plant of 701 in Brazil by capacity.
Brazil has 701 hydro power plants in this dataset, together about 105,987 MW of capacity.
Coordinates -21.85, -42.5833 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Ilha dos Pombos is a 187 MW source-record hydro power plant in Rio de Janeiro, Brazil, commissioned in 1924.
Its output is enough to supply roughly 187,413 homes (estimated).
Ilha dos Pombos is operated by Light Energia SA [100%].
