Växjö, Sweden
Växjö, a city with 64,200 inhabitants in the south of Sweden wants to free itself from fossil fuels by the year 2030. It has already taken big steps in the right direction, reducing its CO2 emissions from fossil fuels by 34 % from 1993-2009. Another objective is to reduce the energy use per capita by 15% between 2008 and 2015.
The CONCERTO approach
Absorption cooling, based on biomass, has been introduced in Växjö. As a first step, cooling is distributed to the hospital and the university. The system replaces electric cooling and is at the same time a basis to increase a local electricity production using Renewable Energy Sources. In the sewage treatment plant, food waste and sludge are sources for biogas that is used for polygeneration of heat, electricity and vehicle fuel.
About 400 energy efficient apartments and one pre-school with a photovoltaic plant have been erected. Many of the buildings have a wooden construction, including the eight storey passive houses. The target was to reach 30% less energy use than applicable regulations. Displays in the apartments as well as web-based tools have helped tenants to reduce their energy use.
In Biskopshagen, a garden district in Växjö, the municipal housing company Växjöhem has built 88 dwellings in 18 buildings and one pre-school with the purpose of having a low energy use. All of them are connected to the district heating system.
An eight storey high low-energy building containing 46 apartments has been built. The house has high insulation standard with good air tightness and heat recovery. In order to help the tenants keeping a low energy routine, displays showing the energy use are installed in each apartment.
134 dwellings in four wooden buildings at the building site have been realised. They are Sweden’s largest newly constructed wooden houses. The energy statistics showed that the use of district heating in the buildings was 69 kWh/m² and the use of electricity was 9 kWh/m². In Portvakten North and South in Växjö, 133 apartments have been constructed, of which 64 are located in passive houses.
Use of Renewable Energy Sources
• Biomass
• Geothermal energy
• Photovoltaics
Low Carbon Technologies
• Sustainable energy management
• Eco-buildings
• District heating from conventional generation
Highlights
A test house for training purpose was built on the construction site of the neighbourhood “Biskopshagen”. Builders and other professionals can train their skills in applying new technologies just before applying them on the real project.
Dwellings in Växjö
Site facts & figures
• Estimated population involved: 2,500
• Approx. geographical area coverage: 200 ha
• Approx. energy saving: 31% in ecobuildings
• Approx. energy from RES: 95% heating
The consortium
• City of Växjö
• Växjö Energi AB (Växjö Energy Company)
• Växjö Kommunföretag AB (Housing Company)
Växjö, a city with 64,200 inhabitants in the south of Sweden wants to free itself from fossil fuels by the year 2030. It has already taken big steps in the right direction, reducing its CO2 emissions from fossil fuels by 34 % from 1993-2009. Another objective is to reduce the energy use per capita by 15% between 2008 and 2015.
The CONCERTO approach
Absorption cooling, based on biomass, has been introduced in Växjö. As a first step, cooling is distributed to the hospital and the university. The system replaces electric cooling and is at the same time a basis to increase a local electricity production using Renewable Energy Sources. In the sewage treatment plant, food waste and sludge are sources for biogas that is used for polygeneration of heat, electricity and vehicle fuel.
About 400 energy efficient apartments and one pre-school with a photovoltaic plant have been erected. Many of the buildings have a wooden construction, including the eight storey passive houses. The target was to reach 30% less energy use than applicable regulations. Displays in the apartments as well as web-based tools have helped tenants to reduce their energy use.
In Biskopshagen, a garden district in Växjö, the municipal housing company Växjöhem has built 88 dwellings in 18 buildings and one pre-school with the purpose of having a low energy use. All of them are connected to the district heating system.
An eight storey high low-energy building containing 46 apartments has been built. The house has high insulation standard with good air tightness and heat recovery. In order to help the tenants keeping a low energy routine, displays showing the energy use are installed in each apartment.
134 dwellings in four wooden buildings at the building site have been realised. They are Sweden’s largest newly constructed wooden houses. The energy statistics showed that the use of district heating in the buildings was 69 kWh/m² and the use of electricity was 9 kWh/m². In Portvakten North and South in Växjö, 133 apartments have been constructed, of which 64 are located in passive houses.
Use of Renewable Energy Sources
• Biomass
• Geothermal energy
• Photovoltaics
Low Carbon Technologies
• Sustainable energy management
• Eco-buildings
• District heating from conventional generation
Highlights
A test house for training purpose was built on the construction site of the neighbourhood “Biskopshagen”. Builders and other professionals can train their skills in applying new technologies just before applying them on the real project.
Site facts & figures
• Estimated population involved: 2,500
• Approx. geographical area coverage: 200 ha
• Approx. energy saving: 31% in ecobuildings
• Approx. energy from RES: 95% heating
The consortium
• City of Växjö
• Växjö Energi AB (Växjö Energy Company)
• Växjö Kommunföretag AB (Housing Company)
CONCERTO is co-financed by the