R i k a r d L a r s s o n -

D i r e c t o r

T h e r m a l S t o r a g e i n t h e B u i l t

E n v i r o n m e n t

The research in short

Energy Flows

Using the time constant

Balance temperature

Theory Vs. reality

Thermal Storage in the Built Environment

- Isfält & Bröms - Royal Institute of.Technology,

Stockholm

- 80%

Covering:

Structure

Indoor temperature range Vs. fixed

Time constant

New methodology

The Research in Short

Energy flows

Energy loss

Purchased energy

Free energy

How to use the Free and exess

Purchased energy

Energy storage

Energy Flows in a normal building

Using the Time Constant of Materials

160 - 300h

(300h for low energy buildings)

60 - 120h

24 - 70h

Aceeptable temperature range

8oC = 80%

3-4oC = 20-40%

0oC = 0%

Balance Temperature

Temperature

Balance temperature

Aceeptable temperature range

8oC = 80%

3-4oC = 20-40%

0oC = 0%

Balance Temperature

Temperature

Balance temperature

Municipal buildning: Highschool

Healthcare: Clinic

Commercial buildings: Office, Railway station

Theory Vs. Reality

+ = 20-40%... Or

Temperature

Municipal Building

Type of building: Highschool Town: Tierp Size: 17 500 m2

Material Brick and concrete Heating: Distric Heating

Heat saving : 32%

Power Signature

Healtcare

Type of building: Clinic Town: Jönköping Size: 11 000 m2

Material Concrete Heating: Distric Heating

Heat saving : 46%

Power Signature

Commercial Building

Type of building: Office Town: Stockholm Size: 15 000 m2

Material Concrete & Glas Heating: Distric Heating

Heat saving : 55%

Power Signature

Commercial Building

Type of building: Train Station Town: Gothenburg Size: 25 400 m2

Material Brick and concrete

Heating: Distric Heating Heat saving : 24%

Power Signature

Summary:

The research in short

Energy Flows

Using the time constant

Balance temperature

Theory Vs. reality

Thermal Storage in the Built Environment:

+ = 20-40%...

Temperature

V i s i t S t a n d E 1 6 f o r a

c h a l l e n g e …

T h e r m a l S t o r a g e i n t h e B u i l t

E n v i r o n m e n t