Ukudu power station is a 198 MW gas power station in Guam, Guam. It is operated by Guam Ukudu Power LLC [100%]. Based on its capacity (estimated), it can supply roughly 223k homes (estimated). It ranks #1 of 1 Guam power plants by installed capacity. Commissioned in 2025, it is around 1 years old — recently built.
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GOGPT_ukudu_guam.
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 · 2026 · L100000406935; fuel: GEM GOGPT
Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG); Siemens Energy: not found. 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.
Operated by Guam Ukudu Power LLC [100%].
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a tropical rainforest climate (Köppen Af) — Northern Hemisphere, latitude 13.5°N — 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.
A gas turbine here also runs ~8% 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.
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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion 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.
Guam has 1 gas power plant in this dataset, together about 198 MW of capacity.
Coordinates 13.523986, 144.80697 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Ukudu power station is a 198 MW gas power plant in Guam, Guam, commissioned in 2025.
Its output is enough to supply roughly 223,004 homes (estimated).
Ukudu power station is operated by Guam Ukudu Power LLC [100%].
