305 student flats built as plus energy buildings: KTH Testbed

KTH Rocks_3 buildings


At the Royal Institute of Technology in Stockholm three plus energy buildings were completed in 2017.

The project consists of three buildings with a total size of over 7000 m2. It has concrete exterior wall elements. The size of the standard apartments is 19.5 sqm and all apartments have their own kitchen and shower room.
The buildings are plus energy houses (they have a positive energy consumptions meaning that they produce more enrgy than they consume on a yearly basis).
The buildings are heated by preheated supply air via the TermoDeck system. Hot water and heat are generated via heat pumps connected to 12 boreholes with a total length of 3600m, and several boreholes

The roof surfaces are covered by 1150 sqm of photovoltaic panels. There are a total of 50 sewage heat exchangers installed.
Extract and supply air can be adjusted in all apartments.
Hot water, electricity, CO2 and light are measured in all apartments. Regulation and control systems are possible to influence for research purposes. The buildings are plus energy buildings.
KTH Live-in Lab. A small part of the project is a lab, consisting of apartments which will be rebuilt every year to do research about systems, technolgy, tenants' behaviour etc.

TermoDeck® System

TermoDeck differs from other energy saving systems because the overall construction cost is lower than conventional buildings as no extra equipment is added.

Thermal energy storage

Thermal energy storage (TES) systems can heavily reduce the installed cooling loads and peak power loads.

Energy efficient buildings

 TermoDeck® Buildings fulfill high requirements from an energy, enviromental and thermal comfort perspective.

Cost-efficient buildings

Independent reports have been carried out comparing capital costs of TermoDeck and conventional HVAC systems.

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