Hässelby is a 75 MW biomass power plant in Stockholm, Sweden. It is operated by Fortum. Based on its capacity (estimated), it can supply roughly 103,242 homes (estimated). It ranks #65 of 168 Sweden power plants by installed capacity. Commissioned in 1959, it is around 67 years old — an older, legacy facility. In context, biomass supplies about 5.8% of Sweden's electricity; the national grid averages 35 gCO₂/kWh (98.8% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1019438.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Fortum. All plants by this company →
This biomass plant burns organic material (wood, residues) to raise steam for a turbine. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 59.4°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 74% above 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: 88/100 — this site sits in the top 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.
The #5 largest biomass power plant of 8 in Sweden by capacity.
Sweden has 8 biomass power plants in this dataset, together about 877 MW of capacity.
Coordinates 59.3623, 17.8241 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
