As an element in the preservation of Visby’s buildings, construction of a district heating network began some 30 years ago. Now, all heat in Visby’s district heating system is produced using a mix of renewable energies. Heating of the municipality’s properties is mainly provided by the district network, connection to this being part of the municipality’s push towards Gotland having a sustainable energy supply.
In Visby as a whole, district heating accounts for over 80 per cent of all heating supplied to commercial premises and dwellings. To the benefit of Visby’s residents and the town’s heritage, this heating contributes to a sustainable society.
District heating removes the need for fuel transport in the narrow streets of the historic town of Visby.
The use of biofuels reduces the emission of sulphur and nitrogen oxides. Compared to the use of fossil fuels, it also lowers the net addition of carbon dioxide to the atmosphere.
Fossil fuels have not been used in Visby’s district heating since 2006.
Since 1980, sulphur emissions from Visby’s district heating have fallen by 95 per cent.
In comparison with individual heating, district heating leaves the air cleaner and healthier for Visby’s residents and the town’s sensitive cultural heritage.
The district heating network in Visby takes its heat from
- Bark, twigs, branches and other (chipped) residues from forest clearances and sawmills.
- A sea water based heat pump with an 11 MW capacity.
- Biogas from the now closed landfill site in Visby.
- Biogas from the wastewater treatment plant.
- Bio oils that replace fossil oils.
Other district heating on Gotland
Besides Visby, the local grid operator GEAB also has district heating networks in the villages Hemse, Klintehamn and Slite. In Hemse and Klintehamn, district heating is generated using biofuel from Gotland’s forests. In Slite surplus heat from the cement factory is used for district heating.
There is a local district heating network in Fårösund. This takes its heat from a private biofuel boiler and supplies, amongst other users, the municipality’s properties. There are also small, bio fuelled local district heating plants in, for example, Roma and Havdhem. One of the customers is the municipality’s housing company GotlandsHem. GotlandsHem themselves also operates one of the small district heating grids in the village Roma, it operates on wood pellets, produced from forests residues on a saw mill in the nearby village Klintehamn.
Read more at www.gotlandsenergi.se