Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE credits
Since the building construction area is accounted for high share of energy usage (36 %) in
Europe, there is high demand to pay attention to this area accurately. Sweden which is one
of the pioneer countries in terms of building energy efficiency plans to reduce this value to
50 % by 2050. To reduce this value there is a need to define a mandatory guideline for
builders by the government. So national board of housing, building and planning (Boverket)
were given responsibility to define these regulations for builders and house owners. Parallel
with that Swedish green building council developed a certification considering the buildin
g’s
energy demand, indoor air climate and environmental impact of building called
Miljöbyggnad. While all the existing and new buildings following Boverket’s regulations
meet this certification’s lowest limitations, some ambitious
builders tend to fulfil its highest
level of limitations called Gold level.
This study aimed to design a house in the area of Smedjebacken to meet Miljö
byggnad’s
gold house’s energy category requirements. To meet the mentioned requirements several
parametric studies regarding insulation thickness, windows assembly, heating and ventilation
system are done via simulation software called TRNSYS. The result of testing several
models show that although windows assembly does not affect this building
’s energy demand
very much, other parameters such as insulation
’s thickness and type of heating system have
a key role.
In addition, a parametric study regarding the impact of thermal mass on the building energy
demand is performed. The result shows that the effect of removed massive wood is
compensated by replaced additional mineral wool insulation.
In conclusion it is concluded that a single family house located in a cold climate like
Smedjebacken using
district heating cannot meet Miljöbyggnad’s gold level criteria without
help of heat recovery ventilation. Furthermore, building with ground source heat pump as
its
heating system can meet Miljöbyggnad’s principals easier than those having district
heating. In this case building with 200 mm insulation thickness even with exhaust air
ventilation meets certification principals easily.
2018.
TRNSYS, insulation thickness, ground source heat pump, district heating, heat recovery ventilation, Miljöbyggnad