1. Heat pumps and district heating
This is Drammen District Heating in Norway. Drammen Fjernewarm. They operate a 45MW district heating system serving over 200 large buildings in the city. The heat was originally from a mixture of fossil fuel and biomass but a new system was designed to make a large heatpump the primary source.
They now draw 75% of the network heat from the ammonia heatpumps at 90C with 15% from biomass and 10% from gas/oil. From the new building shown here 85% of the heat is from the heatpump. Roughly 67GWh per year and over 150GWh since installed in 2010. (summer of 2014).