Union St Aubin is a 14.7 MW coal power plant in Savanne, Mauritius. Based on its capacity (estimated), it can supply roughly 18k homes (estimated). It ranks #17 of 24 Mauritius power plants by installed capacity. In context, coal supplies about 39.3% of Mauritius's electricity; the national grid averages 642 gCO₂/kWh (17.9% low-carbon) (2024).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1023129.
Data status
Known data
Calculated from dataset
Not available
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 · L100000103026; fuel: WRI GPPD
In context: how this plant compares
At 14.7 MW, Union St Aubin is below the median coal plant in Mauritius (70 MW). Coal plants burn pulverised coal to raise high-pressure steam for a turbine; they run as baseload but are the most carbon-intensive mainstream source and the first targeted for retirement or efficiency retrofits.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Share of Mauritius coal capacity
- 4.4% of 335 MW across 5 plants in this dataset
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest coal plants in Mauritius
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Local climate & thermal context
This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a tropical savanna climate (Köppen As) — Southern Hemisphere, latitude 20.5°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.
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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt 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 coal power plant of 5 in Mauritius by capacity.
Mauritius has 5 coal power plants in this dataset, together about 335 MW of capacity.
Nearby power plants
- Ctds power station · Coal · 35 MW · Savanne
- Savannah Estate Sidec power station · Coal · 105 MW · Savanne
- Mon Tresor · Biomass · 12.5 MW · Grand Port
- Tamarin Falls · Hydro · 11.4 MW · Plaines Wilhems
- Henrietta MU · Solar · 25.6 MW · Plaines Wilhems
- Champagne Mauritius · Hydro · 30 MW · Grand Port
Location
Coordinates -20.5079, 57.5426 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Union St Aubin?
Union St Aubin is a 14.7 MW coal power plant in Savanne, Mauritius.