IEA Open Energy Technology Bulletin fra 18. mai omtaler gjenvinningsprosjektet i Oslo:
From sewage pipe to home heating in Oslo
Thanks to a giant heat pump, the district heating system in Oslo (Norway) uses 2400 cubic metres of sewage per hour to heat one million square metres of the city's homes and buildings.
The newly installed heat pump is probably the world's largest using un-treated sewage, rainwater and melted snow. Operating with an efficiency ratio of 2.8, it ratchets water temperature up to 90 degrees Celsius. The pump's clean, efficient technology, developed over 15 years, has raised the share of renewable energy input to Oslo's district heating system from 50% to 70%.
For more information, consult Planet Ark/Reuters news story, or contact project engineer Vidar Havellen (vh at norconsult dot no), a member of Norway's team in the IEA's Heat Pump Programme (IEA HPP). Some informative policy messages have just been issued by IEA HPP about the potential of heat pumps and their key role in affordable, sustainable energy systems. IEA HPP is one of some 40 IEA international collaborative energy technology R&D programmes.