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16 October 2017

Stockholm blog #7: Tenants are moving in...

The personnel from Skanska and Stockholmshem have been working hard to finalise the buildings so that the tenants can start moving back as planned in September. In the last weeks, construction workers have been working nights and weekends to accomplish this. Now the first tenants have moved in and can start using all the smart solutions we have implemented. As soon as the heating season starts (we all wish the first snow would just come!) we can start getting some indications on how energy efficient the buildings are.

Action area 1: Low-Energy Districts

What is happening in Valla Torg, Årsta and the Slakthus area buildings?

To see all the measures to be implemented, click here

The smart solutions for low energy districts will be rolled out in the building zones in Valla Torg, Årsta and the Slakthus areas (see map here). For an overview of the measures being implemented, click here.

In Valla Torg the refurbishment of the first multi-storey building (7G) is on the finish line. There is still some minor painting work to be done in apartments, but all energy efficiency solutions are implemented. Here are some photos of the building:


New insulated façade
New subcentre

Accumulator tanks, where the recovered heat from heat pumps are stored
The waste water heat exchanger


Photovoltaics on the roof

In this building the tenants have the possibility to use the Active House application from Fortum to control the temperature and lighting in the apartment.

The other two buildings under construction are also well on their way. The first half of the low-storey building 8 is finalised and in September tenants moved in. The other half will be finalised later this autumn.

Eastern half of building 8

The second multi-storey building 6 is going to be finalised by the end of this year.

Building 6

In the private condominiums Brf Årstakrönet, Veolia (who just changed their name to L&T) have installed all solutions for optimising the energy use in the building. These are listed below (with pictures):

1. Adaptive control system

2. Temperature control in each apartment

3. Measurement implemented for:

a) Hot water circulation losses

b) District heat energy

c) Electricity

d) Cold Water

4. Thermographic control

5. Smart control of ventilation in garage:

a) PPM

b) Temperature, humidity

6. Electrical hub installed

7. Electrical battery storage installed

8. PV Cells and control system installed

Action area 2: Integrated Infrastructures

To see all the measures to be implemented, click here

Installing smart LED-lighting

The smart LED-street lights (solution 5) have now been in operation for a year.

A Smart Connected City

In Stockholm the smart connected city will use the extensive fibre network provided and administered by Stokab, a company owned by Stockholm City Council (more information). Several Internet of Things applications and solutions can be built on top of the fibre network.

The implementation of sensors in the Slakthusarea has started. IBM, who is responsible for the open consolidated big data platform (solution 8), will analyse data to show how people move around in the Slakthusarea. This starts as soon as the sensors can provide data in October. The project team, platform for data management, analysis tools and methodology are all in place.

Waste heat recovery

Fortum’s open district heating (solution 6) system is now installed in the datacentre. The heat recover can heat up approximately 700 apartments.

Installations in the datacentre

Smart waste handling

The waste handling system provided by Envac was completed by the end of June. The pipelines, inlets and terminal of the smart waste handling system (solution 7) are in place. The terminal and inlets are now being installed.


Pipe transporting waste

Container for waste
Inlets where tenants put their waste


Action area 3: Sustainable Urban Mobility

To see all the measures to be implemented, click here

Building logistics centre and delivery boxes

The Building logistics centre (solution 2), implemented by Carrier, will start handling more materials in autumn. Carrier has together with Skanska agreed which material streams can be best handled by the logistics centre, and these materials will be handled by the centre when the next phase of the refurbishment begins later in the autumn.


The implementation of delivery boxes (solution 9) by Carrier is being done alongside refurbishments of buildings in Valla Torg. When the tenants move back into their apartments starting in September, they can order packages and other deliveries straight to their homes instead of retrieving them from the nearest service point. The delivery from the service point to the building is carried out with cargo bikes.

Smart Traffic Management

KTH has developed a smart phone application (solution 10) to follow up changes in travel behaviour in a way that is more effective and has a greater response rate than traditional travel surveys. This will improve travel demand management measures. In the same application, information about renewable fuels in Stockholm will be shown. This information includes updated information on where each alternative fuel can be tanked, together with the most recent prices. The application will be launched when tenants have moved back later this autumn.

Alternative fuel driven vehicles

As part of the GrowSmarter project, Fortum will install up to 10 charging stations and one fast charger (solution 11). The fast charger is installed in Årsta. The normal chargers are also installed in Valla Torg.

The first three refuelling station (solution 11) for renewable fuels are up and running. The filling station in Årsta is expected to be built in the beginning of 2018.

Communication and marketing

In Stockholm several study visits have been arranged and there is high interest in the GrowSmarter solutions. As more and more smart solutions are implemented, the study visits will become more frequent. In October 2017 there will be an event demonstrating the smart solutions in Valla Torg. Here the focus is on city representatives. In November/December 2017 a similar event will be arranged in Slakthusarea. In spring 2018 an event is planned for tenants in Valla Torg.

A video has been produced showcasing the smart solutions implemented in Stockholm. The video can be seen here.

Discussed in this blog

Solution 2: Smart building logistics

Solution 5: Smart street lighting

Solution 6: Waste heat recovery

Solution 7: Smart waste collection

Solution 8: Big data management

Solution 9: Sustainable delivery

Solution 10: Smart traffic management

Solution 11: Alternative fuel-driven vehicles


Mika Hakosalo

Site Manager, Stockholm

For the previous blog post, click here