The Linero district is a housing area where the blocks Eddan and Havamal consist of 28 three-storey dwellings built in early 1970s. Today they contain a total of 681 apartments with approximately 2,000 tenants. They are owned by the public housing company Lunds Kommuns Fastighets (LKF) AB. Only 16 of the 28 buildings are including in the CITyFiED projects 40,400 m2 (conditioned area). The retrofitting of Linero district will focus on reaching a higher energy standard with maintained affordability for the tenants.
A local partnership approach that delivers: co-operation in Lund
Four Swedish partners are working to ensure Linero is a close to zero energy-district. On site and behind the scenes, bring the different skills of energy company Kraftringen, public housing company, LKF, Swedish environmental research institute, IVL and the City of Lund together effectively is important to safeguard the systemic approach that characterizes the project.
To maximize results and prevent misunderstandings, three structures have been added to the original project design. These are a steering committee ensuring a high-level awareness of CITyFiED actions and methodology; a communications group to speak with a united voice and engage with residents; and collaborative working days:
“One day per week, people from all four of the partner organizations get together in the same building not only for scheduled meetings but also for working alongside on the common protocols in order to facilitate closer cooperation, exchange of ideas and face to face communication” explains Jeanette Green, project coordinator at IVL Swedish Environmental Institute. “Each of the partners takes it in turns to host, so we are also exposed to each others environment, working culture and assets to help make CITyFiED a success in Linero – and hopefully prime ourselves and others for similar projects in the future.”
Coming soon: the dedicated Lund mini-site in swedish!
Setting an ambitious pace
- +30,8% total energy savings
- -19% primary energy use
- -26% greenhouse gas emissions
Demo-site teams in Lund have hit the road running to achieve some significant milestones since CITyFiED began in April 2014.
During the first part of the project, simulations of the energy efficiency measures included in the retrofitting strategy have been carried out. Simulations showed that original energy savings targets cannot only be accomplished – but have even been revised upwards.
After some positive first round of analysis, total energy savings in Linero have been calculated at approximately 52 kWh/m²/year, potentially even higher that the original target 30.8%. Primary energy savings at the site have been established at 19% and greenhouse gas emissions will be reduced by 26%, using 2016 conversion factors.
Four indicators for indoor environmental quality in the buildings were analysed: operative temperature, relative humidity, CO2 levels and PPD. None of the indicators show critical levels in the current buildings and no negative effect have been observed from calculations of the renovation measures.
At the heart of reaching these performance targets is the efficiency of an extensive renovation strategy. From replacement windows and balconies, to presence controlled LED lighting in the stairwells, the actions being taken within CITyFiED are meticulously researched and planned.
Numerous full-scale concept solutions to complement structural advantages will include smart grid monitoring initiatives - with visualization tools and demand responsive meters – solar panels, fast charge points for electric vehicles and smart district heating controls.
CITyFiED partners and cities will be able to dive into the details of each of these initiatives as the project develops.