Hoyanger aluminium plant — Norway

Hoyanger aluminium plant is an aluminium smelter in Norway. Its listed capacity is 65,000 t of alumina/aluminum. Aluminium smelters use large electric currents to refine alumina into molten aluminium above 900°C, and the hot metal must flow through crucibles and casting equipment. It is operated by Norsk Hydro ASA. By capacity it ranks #3 among 4 aluminium smelters in Norway. It emits about 140,578 t CO₂e a year from Climate TRACE. That is 0.98% of the CO₂e from the 46 facilities in Norway that have an emissions figure in IndustryAtlas.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-3673112.

In context: how this facility compares

At 65,000 t of alumina/aluminum, Hoyanger aluminium plant is below the median aluminium smelter in Norway (204,000 t of alumina/aluminum). Subsector: aluminum. As aluminium smelter, it requires high process heat (typically 600–900°C) for its core industrial operations, supplied by boilers, furnaces or direct combustion. Aluminium smelters use large electric currents to refine alumina into molten aluminium above 900°C, and the hot metal must flow through crucibles and casting equipment.

Capacity & CO₂-intensity comparison computed from Climate TRACE industrial facilities data; sector role based on engineering reference.

What 140,578 t CO₂e a year looks like

This facility's estimated annual CO₂e (Climate TRACE, modelled) in everyday equivalents from the US EPA Greenhouse Gas Equivalencies calculator:

Equivalencies: US EPA Greenhouse Gas Equivalencies. Emissions: Climate TRACE.

Capacity vs largest aluminium smelters in Norway

Listed capacity (t of alumina/aluminum), Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).

Operator

Operated by Norsk Hydro ASA. All facilities by this operator →

Local climate

Hoyanger aluminium plant sits in a subarctic (boreal) climate zone (Köppen Dfc), at 61.2°N in the northern hemisphere.

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

Site climate & environmental severity

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

In this site’s local climate, a bare 150 °C surface sheds about 1468 W/m² to ambient — roughly 1.13× the loss at a 20 °C reference. Reference-surface calculation at a 150 °C surface from WorldClim climate normals (ASTM C680 / ISO 12241) — an indicative per-climate comparison, not a measurement of this site’s specific equipment. Open method dataset: DOI 10.5281/zenodo.20787408 (CC BY 4.0).

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 sites

The #3 largest of 4 aluminium smelters in Norway by listed capacity (Climate TRACE).

Nearby industrial sites

• Hydro Aluminium, Høyanger · Metals Plant · 104,000 t CO₂
• Equinor Mongstad Crude Oil Refinery · Refinery · 2,527,215 t CO₂
• Elkem Bremanger · Metals Plant · 319,000 t CO₂
• ELKEM ASA AVD BJØLVEFOSSEN · Metals Plant · 174,000 t CO₂
• Elkem Bjølvefossen · Metals Plant · 172,000 t CO₂
• Vedde As · Food & Beverage · 401,300 t CO₂

Location

Coordinates 61.2179, 6.06754. View on OpenStreetMap.

Frequently asked questions