Gothenburg, Sweden
Backadalen, located in Gothenburg, Sweden, is one of the biggest housing
cooperafives in Sweden with almost 1000 apartments. The buildings are from
1969 and in 2019 a ground source heat pump system was finalized
supplemenfing the already exisfing district heafing system used for heafing and
domesfic hot water (DHW). The buildings are now heated by the GSHP-system
with the aid of the district heafing system.
The purpose of the “Smart heat” project is to operate boreholes and heat
pumps in the most cost-efficient way possible, this was done by combine the
heat pumps with the already exisfing district heafing and make it possible to
store excess district heat in the boreholes during the summer, to use by the
heat pumps during the heafing season. Storing heat in the boreholes increases
the heat source temperatures which gives the heat pumps higher COP. In
Gothenburg a large share of the district heat comes from industrial excess heat
from the oil refineries and from waste combusfion running during the whole
year and thereby gives a lot of available district heafing during the summer
period when the heat demand is low