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Theiss power station

Gas power plant in Niederösterreich, Austria. Approximate location 48.39486, 15.71015.

GasNiederösterreichAustriaCCGT · HRSGCO₂ measured

Theiss power station is a 725 MW gas power station in Niederösterreich, Austria. It is operated by EVN AG [100%]. Based on its capacity (estimated), it can supply roughly 817k homes (estimated). It ranks #5 of 131 Austria power plants by installed capacity. Commissioned in 2003, it is around 23 years old — relatively modern. Its annual emissions of 49,873 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 12k cars driven for a year. In context, gas supplies about 11.9% of Austria's electricity; the national grid averages 117 gCO₂/kWh (83.6% low-carbon) (2025).

725MW installed capacity
2HRSG unit(s)
816,557homes powered (est.)
49,873t CO₂ / yr (EU ETS verified (EUTL 2023))
2003commissioned (~23 yrs)

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

Data status

Known data

FacilityTheiss power station GEM-GOGPT
CountryAustria · Niederösterreich GEM-GOGPT
Coordinates48.39486, 15.71015 GEM-GOGPT
FuelGas GEM-GOGPT
MW installed capacity725 MW GEM GOGPT; source record
OwnerEVN AG [100%] GEM-GOGPT
Commissioned2003 GEM-GOGPT
TechnologyCCGT · HRSG GEM-GOGPT
CO₂ emissions49,873 t CO₂·a⁻¹ measured · EU ETS verified (EUTL 2023)

Calculated from dataset

Capacity rank in country#5 / 131 calculated
Fuel-specific rank in country#3 / 15 calculated
Capacity vs country/fuel peers4.74× · 153 MW · n=15 calculated
Homes-powered equivalent816,557 calculated
Environmental severityC2 · 27/100 derived from coordinates

Not available

GWh reported / yrNot available not in dataset

Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.

Data provenance

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

In context: how this plant compares

At 725 MW, Theiss power station is well above the median gas plant in Austria (153 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). 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.

49,873 t CO₂/yr — in everyday terms

This facility's annual emissions are roughly equivalent to:

12kpassenger cars driven for a year
6.5khomes' yearly energy use
831ktree seedlings grown 10 years to absorb it

Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per EU ETS verified (EUTL 2023) (measured for US EPA/EU ETS, modelled for Climate TRACE).

Capacity vs largest gas plants in Austria

Simmering: 1,240 MW1kSimmeringMellach power station: 1,084 MW1kMellach po…Theiss power station: 725 MW725Theiss pow…Timelkam: 400 MW400TimelkamDonaustadt: 395 MW395DonaustadtLinz Mitte power station: 217 MW217Linz Mitte…Linz Süd power station: 172 MW172Linz Süd p…Werk Linz power station: 153 MW153Werk Linz …

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

Owner

Operated by EVN AG [100%].

Climate zone & how it works

This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 48.4°N — which shapes how much energy it can produce and how its output varies through the year.

~11°Ctypical annual mean
~18°Ctypical warm-season mean
Temperate oceanic: four distinct seasons — cold winters and warm summers

Climate zone & typical temperatures: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

Site climate & environmental severity

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 mild atmospheric environment (estimated ISO 9223 class C2 — Low), with humidity / wetness the leading environmental stress.

C2ISO 9223 corrosivity (indicative)
27/100environmental-severity index
19.8°Cseasonal temperature swing
334 kmdistance to coast

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.

How it compares & nearby plants

The #3 largest gas power plant of 15 in Austria by capacity.

Austria has 15 gas power plants in this dataset, together about 4,974 MW of capacity.

Nearby power plants

Location

Coordinates 48.39486, 15.71015 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions

What type of power plant is Theiss power station?

Theiss power station is a 725 MW gas power plant in Niederösterreich, Austria, commissioned in 2003.

How many homes can Theiss power station power?

Its output is enough to supply roughly 816,557 homes (estimated).

Who operates Theiss power station?

Theiss power station is operated by EVN AG [100%].

How much CO₂ does Theiss power station emit?

Theiss power station has measured emissions of about 49,873 tonnes of CO₂ per year (EU ETS verified (EUTL 2023)).

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