Yeosu — South Korea

Yeosu is a 679 MW coal power station in Jeollanam-do, South Korea. It is operated by Korea South East Power (KOSEP). Based on its capacity (estimated), it can supply roughly 850k homes (estimated). It ranks #59 of 216 South Korea power plants by installed capacity. Commissioned in 2011, it is around 15 years old — relatively modern. Its modelled annual emissions are 3,049,100 t CO₂/yr (Climate TRACE), equivalent to about 711k cars driven for a year. In context, coal supplies about 31.1% of South Korea's electricity; the national grid averages 417 gCO₂/kWh (40.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000189.

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000103476; fuel: WRI GPPD

In context: how this plant compares

At 679 MW, Yeosu is well above the median coal plant in South Korea (400 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.

~3,049,100 t CO₂/yr (modelled) — in everyday terms

This facility's annual emissions are roughly equivalent to:

Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.

Key facts

Share of South Korea coal capacity

1.4% of 46,928 MW across 34 plants in this dataset

Age among peers

8 of 25 dated coal plants in South Korea are older

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 South Korea

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by Korea South East Power (KOSEP). All plants by this company →

Local climate & thermal context

This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a humid subtropical (dry winter) climate (Köppen Cwa) — Northern Hemisphere, latitude 34.8°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 11% 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: 46/100 — this site sits in the mid 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.

Site climate & environmental severity

This site sits in a corrosive environment (estimated ISO 9223 class C4 — High), with marine 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 #14 largest coal power plant of 34 in South Korea by capacity.

South Korea has 34 coal power plants in this dataset, together about 46,928 MW of capacity.

Nearby power plants

• Yoesu Lotte · Gas · 80 MW · Jeollanam-do
• Yosu Plant-1 power station · Coal · 140.1 MW · Jeollanam-do
• Yeosu Hanwha power station · Coal · 250 MW · Jeollanam-do
• Kumho Yeosu CHP power station · Coal · 264 MW · Jeollanam-do
• Honam · Coal · 500 MW · Jeollanam-do
• Gwangyang POSCO · Gas · 500 MW · Jeollanam-do

Location

Coordinates 34.8393, 127.6908 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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