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 )
Hammarby Sjöstad is highly relevant as a test site for the project for several reasons:
- The area is already equipped with smart meters for electricity, connected to the DSO.
- 150 apartments are supplied with individual measurement of sanitary hot water consumption and of heating through the hydronic system.
- The tenants can request hourly measurements of electricity use and demand a contract where the price is connected to the production cost through the price on the Nordic electricity market, Nordpool.
- The inhabitants have already initiated activities for reducing energy use and for increasing local energy "production" by solar collectors and PV panels
- Campaigns to change the habits of the inhabitants are also planned.
- The present project will be able to leverage on these projects initiated by and paid by the tenant owners.
The fact that tenants are mostly young families facilitates the introduction of modern ICT.
Impact ( click here )
The pilot site in Fårdala will demonstrate a new community level organization and interaction in the energy management sector, innovating informative details, interaction models, collaborative and common targeted approaches.
The overall impact will be expected in terms of:
- Improving the energy efficiency and reduction resulting CO2 emissions as result of implementation of measures proposed by CIVIS Project.
- Provide interactive decision support systems to raise awareness about energy use and impact user behaviors.
- Test business models for energy interaction based on prosumer approach and facilitate social dynamics around energy exchange.
- Facilitate stakeholders in decision making regarding energy issues.
Energy structure & Technical Description (click here )
|Number of dwellings||
In total 9000 flats in the area. However, only a small share of this will be used in the project. A minimum number of 300 apartments is anticipated.
|Typology of users||
Mainly residential, with a clear demographic preference to young families.
|Systems (building level, district level, technologies ...)||
All buildings are heated by hydronic (water)systems.
|Grids||All buildings are connected to the greater Stockholm district heating network. Commercial buildings are connected to the district cooling grid, getting the cooling capacity from cold lake water and from the local heat pumps. Part of the area also has biogas from a nearby sewage plant. This gas is used in about 1000 gas stoves, as well as for water heating, and to some extent as fuel for cars. Electricity is supplied through the DSO Fortum.|
|Energy balance and RES diffusion in the area of CEIS||
The energy for the district heating originates from several different plants, the closest one being Högdalen. Local generation comes from the local heat pumps and to some extent from biogas produced in the nearby sewage plant, Henriksdal, serving a greater area than just Hammarby Sjöstad. Local municipal waste from the area is used as fuel in a CHP plant, Högdalen, located about 8 km south of the district.
|Info-telematic system at system level||All apartments have high speed internet access (up to 1000/1000Mbit/s) through the open city network and customers can select from a wide range of suppliers of services.|
|Info-telematic system (energy consumption profiles) at user level||Each apartment-owner has the possibility to select the supplier and type of contract. All users have smart electricity meters which can be read by the DSO each hour. A limited number of apartments also have individual metering of heat for the heating system and for sanitary hot water consumption. Most commonly this is done at the building level.|
|Info-telematic system utility to peer and peer to utility enabling social / business models application||All smart electricity meters are connected to the DSO. The users have the possibility to select electricity tariffs where the prices are connected to the electricity price on the Nordic energy market, Nordpool. Depending on the agreement, the price may be related to the average electricity price over a month, or to the hourly variations in the Nordpool prices. These prices are fixed 24 h in advance and displayed on the Nordpool web page. Thereby any user has the possibility to use the information for shifting electricity loads to periods of the day with lower price. At the moment there is no automatic system for doing the load shifting for a private user.|
|Integration of energy and mobility management||
A local organization for co-ownership of a fleet of electric vehicles is being formed. Charging of the vehicles will then be an integral part of the local energy system.
|Distributed storage systems (yes/not, storage capacity)||No dedicated distributed storage system is installed in the area. However, the buildings have in themselves a considerable sensible storage capacity which could be used for peak shaving. As far as known, this possibility is not utilized at the moment. The batteries of the electric-car fleet may be used for load shifting when not used. It will also be possible to re-use the car batteries for stationary energy storage when the capacity has decreased too much for use in the cars.|
|Other relevant features of the proposed pilot site smart city||
In Hammarby Sjöstad several test installations have been done for local generation of heat and electricity. Solar collectors of 390 m2 for water heating are installed on the roof of the block Viken. Combined solar collectors of a new type, for water heating and electricity production have been installed on another rooftop. PV panels are at some locations integrated into the building walls or at the rooftops (blocks Grynnan, Holmen, JMbuilding, GlashusEtt).