Dietrich Schmidt - KTH Division of Building Technology
Dietrich Schmidt
Division of Building Technology,
KTH – The Royal Institute of Technology, Stockholm, Sweden
Presentation of a possible pre-design tool
Version 2
Dietrich Schmidt - KTH Division of Building Technology
Aims
• Transparent tool
• easy to use
• For suitable for target group:
architects, building designer
• Limited number of pages 2+2
• Make exergy approach clear
steady state!
Dietrich Schmidt - KTH Division of Building Technology
H T
Q w
Q s
Q i
H V
Q h
System boundary Solar
gains Φs
Required energy Φge
Ventilation losses ΦV Internal
gains Φi Transmission
losses ΦT
Dietrich Schmidt - KTH Division of Building Technology
Expanded system boundary
Bought energy Primary energy
Transport Transformation
Extraction Use
Dietrich Schmidt - KTH Division of Building Technology
Energy flows
Dietrich Schmidt - KTH Division of Building Technology
Modelling structure of the tool
Dietrich Schmidt - KTH Division of Building Technology
Modelling structure of the tool direction of calculation
Development of demand
Let‘s have a
look NOW!
Dietrich Schmidt - KTH Division of Building Technology
Analysed example: ZUB!
Demoproject of Annex 37
Dietrich Schmidt - KTH Division of Building Technology
Input in sections:
• Project data (boundaries)
• Heat losses
(Transmission, ventilation)
• Heat gains
(Solar gains, internal gains)
• Heat demand
• Heat production and emission
• Auxiliary energy demand (lighting, ventilation)
• Results of calculation
Dietrich Schmidt - KTH Division of Building Technology
Exergy and Energy flows
0 10000 20000 30000 40000 50000 60000 70000 80000
1 2 3 Components4 5 6 7 8
Energy / Exergy (W)
energy total heat energy aux energy
incl. free /rene. ener.
exergy
Generation Storage Distribution Emission Room Air Envelope Prim.
Energy transform
Dietrich Schmidt - KTH Division of Building Technology
Exergy demand by components
0 5000 10000 15000 20000 25000 30000 35000 40000
1 2 3 Components4 5 6 7
Exergy (W)
Generation Storage Distribution Emission Room Air Envelope Prim.
Energy transform
Dietrich Schmidt - KTH Division of Building Technology
Energy gains-losses
0,00 10000,00 20000,00 30000,00 40000,00 50000,00 60000,00 70000,00 80000,00 90000,00
energy loss
Auxiliary energy prim transform light/air
system heat losses ventilation transmission walls transmission ground transmission roof transmision window
0,00 10000,00 20000,00 30000,00 40000,00 50000,00 60000,00 70000,00 80000,00 90000,00
energy gains
Energy (W)
primary energy renewable internal
solar (windows)
Dietrich Schmidt - KTH Division of Building Technology
Exergy supply-demand
0,00 10000,00 20000,00 30000,00 40000,00 50000,00 60000,00 70000,00 80000,00
exergy demand
Primary exergy Generation Storage Distribution Emission Room Air Envelope
0,00 10000,00 20000,00 30000,00 40000,00 50000,00 60000,00 70000,00 80000,00
exergy supply
Exergy (W)
primary exergy renewable internal
solar (windows)
Dietrich Schmidt - KTH Division of Building Technology
Energy flow as Sankey
Heat recovery ventilation
Solar gains (windows)
2425.00
Internal gains
4000.00
Renewable energy input
0.00
Primary energy input
70709.00
Energy transform
The ZUB building
63456.00
Transmission windows
11479.00
Transmission roof
1530.00
Transmission ground
1545.00
Transmission walls
2190.00
Ventilation losses
5810.00
HVAC system losses
1728.00
Ventilation / lighting
13076.00
Auxiliary energy use
2677.00
Primary energy transform
36918.00
Dietrich Schmidt - KTH Division of Building Technology
Exergy flows as Sankey (?)
Solar gains (windows)
2182.00
Internal gains
477.00
Renewable exergy input
0.00
Primary exergy input
67881.00
Exergy transform
The ZUB building
33051.00
Exergy demand envelope
1151.00
Exergy demand room air
78.00
Exergy demand emission system
1368.00
Exergy demand destribution system
2905.00
Exergy demand storage
0.00
Exergy demand generation
24887.00
Primary exergy transform
37489.00
losses
2662.00
Dietrich Schmidt - KTH Division of Building Technology
Energy classification (proposal)
Dietrich Schmidt - KTH Division of Building Technology
