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Mendalan - Brantas

Hydro power plant in East Java, Indonesia. Approximate location -7.854, 112.3316.

HydroEast JavaIndonesia

Mendalan - Brantas is a 23 MW hydro power plant in East Java, Indonesia. It is operated by PLN - Java Bali Generation Unit / PT. PJB. Based on its capacity (estimated), it can supply roughly 23,026 homes (estimated). It ranks #143 of 178 Indonesia power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 7.3% of Indonesia's electricity; the national grid averages 680 gCO₂/kWh (18.1% low-carbon) (2024).

23MW installed capacity
23,026homes powered (est.)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000788.

Capacity vs largest hydro plants in Indonesia

CirataI & II: 1,008 MW1kCirataI & …Saguling: 701 MW701SagulingTangga (asahan II): 317 MW317Tangga (as…Sigura gura (asahan II): 286 MW286Sigura gur…Musi: 216 MW216MusiJatiluhur: 186 MW186JatiluhurPB. Sudirman/Mrica: 181 MW181PB. Sudirm…Asahan I: 180 MW180Asahan I

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

Owner

Operated by PLN - Java Bali Generation Unit / PT. PJB. 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 monsoon climate (Köppen Am) — Southern Hemisphere, latitude 7.9°S — which shapes how much energy it can produce and how its output varies through the year.

19.3°Cannual mean temp
0heating degree-days (base 18°C)
479cooling degree-days (base 18°C)
1,167 melevation

Monthly mean temperature

J: 20 °CJF: 20 °CFM: 20 °CMA: 20 °CAM: 20 °CMJ: 19 °CJJ: 18 °CJA: 18 °CAS: 19 °CSO: 20 °CON: 20 °CND: 20 °CD20 °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 #23 largest hydro power plant of 41 in Indonesia by capacity.

Indonesia has 41 hydro power plants in this dataset, together about 4,560 MW of capacity.

Nearby power plants

Location

Coordinates -7.854, 112.3316 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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