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9
ZEB
annual report 2015
• Five dwellings on the Skarpnes housing
estate, Arendal, were completed in 2014.
All five projects have provided valuable input
to the ZEB Concept and Definition and will
continue to do so during their first years of
operation where they will continue to be
monitored and analyzed. Four projects are
still under development. Construction will start
on Heimdal High School and the Campus
Evenstad office and educational building in
2016.
Parallel to the development of the ZEB
demonstration projects, research is still on-
going in the five work packages, with activities
as diverse as nano insulation material
development in the laboratories and user and
process studies in the demonstration projects.
New material developments are concerned
with experimental investigations on increasing
the thermal resistance of various concrete
recipes by incorporation of aerogel granules
and on applying silver particles to make a
low-emissivity coating with a total surface
emissivity value as low as 0.015. Further,
studies have been conducted on alkaline
ageing experiments on vacuum insulation
panels (VIP), which showed various degrees
of degradation and where in general elevated
temperatures proved to be the most significant
strain caused by ageing when compared to
pH-value. We have also performed further
studies on hollow silica nanospheres (HSNS),
which represent a promising stepping-stone
toward thermal superinsulation materials
(SIM).
Advanced façade technologies with integrated
VIP, solar collectors, and associated
ventilation strategies have been investigated,
and component design strategies have been
developed. Reflective foils are a promising
solution for improving thermal properties of
the building envelope, especially in floors.
Experimental studies at the ZEB Pilot House
Larvik and in the laboratory have been
performed in order to verify the performance
of floor constructions with reflective foils. In
addition, we have proven the limited effects
of moisture buffering for internal surface
materials on the energy performance of
Heimdal Upper Secondary School and Sports Hall, Trondheim, Norway. The building will have 26,000 m
2
heated floor area (including education, offices, dental
clinic). The developer is South-Trøndelag County, the architect is Rambøll/KHR. The level of ambition is ZEB-OM* (20% of M).
Illustration by Skanska and Rambøll/KHR Arkitekter.