Ulubelu 1 & 2 is a 110 MW geothermal power station in Lampung, Indonesia. It is operated by PT. PLN. Based on its capacity (estimated), it can supply roughly 206k homes (estimated). It ranks #247 of 401 Indonesia power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, geothermal supplies about 4.5% of Indonesia's electricity; the national grid averages 680 gCO₂/kWh (18.1% low-carbon) (2024).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1001040.
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
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 110 MW, Ulubelu 1 & 2 is around the median geothermal plant in Indonesia (110 MW). Geothermal plants tap underground heat to raise steam for a turbine; they provide steady, low-carbon baseload but are limited to geologically active regions.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Share of Indonesia geothermal capacity
- 8.2% of 1,342 MW across 10 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 geothermal plants in Indonesia
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by PT. PLN.
Local climate & thermal context
This geothermal plant taps underground heat to raise steam that drives a turbine. It sits in a tropical rainforest climate (Köppen Af) — Southern Hemisphere, latitude 5.3°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 geothermal power plant of 10 in Indonesia by capacity.
Indonesia has 10 geothermal power plants in this dataset, together about 1,342 MW of capacity.
Nearby power plants
- Tegineneng · Oil · 28.2 MW · Lampung
- Besai - Way Kanan · Hydro · 92.8 MW · Lampung
- Komering Agung Power Station · Coal · 60 MW · Lampung
- PLTU Tarahan # 1 2 · Coal · 200 MW · Lampung
- PLTU Tarahan 3 & 4 - Sebalang · Coal · 200 MW · Lampung
- Tarahan power station · Coal · 500 MW · Lampung
Location
Coordinates -5.3096, 104.5733 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Ulubelu 1 & 2?
Ulubelu 1 & 2 is a 110 MW geothermal power plant in Lampung, Indonesia.
Who operates Ulubelu 1 & 2?
Ulubelu 1 & 2 is operated by PT. PLN.