Ramu

Hydro power plant in Eastern Highlands, Papua New Guinea. Approximate location -6.2505, 145.9805.

HydroEastern HighlandsPapua New Guinea

Ramu is a 75 MW hydro power plant in Eastern Highlands, Papua New Guinea. It is operated by PNG Power Limited. Based on its capacity (estimated), it can supply roughly 75,085 homes (estimated). It ranks #1 of 15 Papua New Guinea power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 21.1% of Papua New Guinea's electricity; the national grid averages 514 gCO₂/kWh (23.7% low-carbon) (2024).

75MW installed capacity
75,085homes powered (est.)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1022419.

Capacity vs largest hydro plants in Papua New Guinea

Ramu: 75 MW75RamuOk Menga: 57 MW57Ok MengaYonki Toe of Dam: 18 MW18Yonki Toe …Pauanda: 12 MW12PauandaLake Hargy: 2 MW2Lake HargySirinumu Dam: 2 MW2Sirinumu D…

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

Owner

Operated by PNG Power Limited. All plants by this company →

Local climate & thermal context

This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a tropical rainforest climate (Köppen Af) — Southern Hemisphere, latitude 6.3°S — which shapes how much energy it can produce and how its output varies through the year.

19.9°Cannual mean temp
0heating degree-days (base 18°C)
678cooling degree-days (base 18°C)
1,422 melevation

Monthly mean temperature

J: 21 °CJF: 21 °CFM: 20 °CMA: 20 °CAM: 20 °CMJ: 19 °CJJ: 19 °CJA: 19 °CAS: 20 °CSO: 20 °CON: 20 °CND: 20 °CD21 °C

Heating degree-days here run 100% 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: 13/100 — this site sits in the bottom third of the power plants we cover by heating degree-days.

In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.

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.

How it compares & nearby plants

The #1 largest hydro power plant of 6 in Papua New Guinea by capacity.

Papua New Guinea has 6 hydro power plants in this dataset, together about 165 MW of capacity.

Nearby power plants

Location

Coordinates -6.2505, 145.9805 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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