İzmit-Köseköy power station — Turkey

İzmit-Köseköy power station is a 112 MW gas power station in Kocaeli, Turkey. It is operated by Entek Elektrik Üretimi AŞ [100%]. Based on its capacity (estimated), it can supply roughly 126k homes (estimated). It ranks #302 of 502 Turkey power plants by installed capacity. Commissioned in 2014, it is around 12 years old — relatively modern. In context, gas supplies about 22.1% of Turkey's electricity; the national grid averages 475 gCO₂/kWh (43.3% low-carbon) (2025).

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

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100000405920; fuel: GEM GOGPT

In context: how this plant compares

At 112 MW, İzmit-Köseköy power station is below the median gas plant in Turkey (180 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG); GE Power. 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.

Key facts

Share of Turkey gas capacity

0.2% of 57,910 MW across 142 plants in this dataset

Age among peers

55 of 69 dated gas plants in Turkey are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest gas plants in Turkey

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

Owner

Operated by Entek Elektrik Üretimi AŞ [100%].

Local climate & thermal context

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a hot-summer Mediterranean climate (Köppen Csa) — Northern Hemisphere, latitude 40.8°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 24% 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: 41/100 — 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.

Site climate & environmental severity

This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness 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 #95 largest gas power plant of 142 in Turkey by capacity.

Turkey has 142 gas power plants in this dataset, together about 57,910 MW of capacity.

Nearby power plants

• İzmit-Köseköy power station · Gas · 160 MW · Kocaeli
• Kentsa power station · Gas · 117.7 MW · Kocaeli
• Kentsa power station · Gas · 40 MW · Kocaeli
• İzmit İpekkağıt Termik Santrali · Gas · 16 MW · Kocaeli
• Izmir Refinery power station · Gas · 82 MW · Kocaeli
• IZMIT REFINERY · Oil · 180 MW · Kocaeli

Location

Coordinates 40.773055, 29.94696 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions