Hammarby Sjöstad

Hammarby Sjöstad is a new area in Stockholm, partly finished, partly under construction. The city has imposed tough environmental requirements in the area, in an effort to reduce energy use for heating as well as for transport, promote and facilitate re-use of resources, e.g. through waste management and biogasproduction, and in general to decrease the environmental impact of the area. It is also designed to be a pleasant area to live in, with large park-like grounds with plenty of trees and bushes. The area is facing Hammarby lake, a strait in between Lake Mälaren and the Baltic. To the south there is access to recreation areas by a wide ”green bridge” passing over the roads accessing the area.
The total size of Hammarby Sjöstad is 145 ha, and when finished there will be 9000 new flats and 200.000 m2 new offices and services. Most buildings are owned by local tenant-owner associations, connected to an umbrella organization called Sjöstadsföreningen. This organization and its chapter HS2020, is highly engaged in developing the area further, not the least with the aim of increasing the energy performance, which has proven to be not as good as expected in the initial plans. A specific goal is to make the area a demo-site for Smart Grids. A second specific goal is to make it a demo-site for the next generation Information and Communication Technology.
The area is heated mainly by district heating through the large district network of the greater Stockholm area. The sources of the heat are diversified and changes depending on the seasons. A major part comes from a large co-generation plant, Högdalen, partly fired by municipal waste, partly by biofuel such as tall-oil, residues from the wood and pulp industries and sometimes even olive stones, but to some extent by coal. The district heating system is also heated by some of the world’s largest heat pumps, some of which are located in Hammarby Sjöstad, using sewage water or sea water as the heat source.
Within the area there are a number of smaller installations of PV-panels. However, these are not sufficient for covering the electricity need of the building, except perhaps in certain days in the summer.

Relevance for the project ( click here )

Impact ( click here )

Energy structure & Technical Description (click here )