BuildTog - affordable buildings in nearly-zero energy performance
Thilo Cunz │ Architekt
Senior Manager Asia/Europe
LUWOGE consult GmbH
affordable buildings in nearly-zero energy performance
BUILDTOG │ PROJECT COMPARISON
BuildTog - affordable buildings in nearly-zero energy performance
BuildTog - affordable buildings in nearly-zero energy performance
©LUWOGE CONSULT
energy demand optimization
BUILDING ENERGY BALANCE
-40
-30
-20
-10
0
10
20
30
40
50
60
1 2 3 4 5 6 7 8 9 10
kWh/m²a
GAINS AND LOSSES - 126 + 26
Envelope 1 Roof - 3%
2 Wall - 13%
3 Floor - 3%
4 Windows/ Doors - 21% + 10%
5 Thermal heatbridges
- 7%
Ventilation 6 Infiltration - 10%
7 Ventilation system - 17%
8 Window ventilation - 8%
Use 9 Hot water/ internal gains
- 28%+ 14%
Buildingservices
10 Heat generation - 16% + 2%
Standard
BuildTog - affordable buildings in nearly-zero energy performance
©LUWOGE CONSULT
REDUCTION OF TRANSMISSION LOSSES
• Reduction of building envelope in comparison to the building volume
• Increasing the average heat transfer resistance of the building envelope
• Increasing the average heat transfer resistance of the openings
• Avoidance of thermal bridging
REDUCTION OF VENTILATION LOSSES
• Reduction of infiltration losses
• Implementation of ventilation systems
• Adapting window ventilation
REDUCTION OF CONSUMPTION LOSSES
• Reduction of room temperature
• Reduction of hot water consumption
• Reduction of domestic electricity consumption
OPTIMIZATION OF BUILDING SERVICES
• Implementation of energy efficient technical devices
• Avoidance of losses through storage and distribution
• Reduction of system temperatures
energy demand optimization
MINIMIZING LOSSES
-40
-30
-20
-10
0
10
20
30
40
50
60
1 2 3 4 5 6 7 8 9 10
kWh/m²a
LOSSES (- 126%) - 85%
Envelope 1 Roof - 1%
2 Wall - 7%
3 Floor - 1%
4 Windows/ Doors - 11%
5 Thermal heatbridges
- 1%
Ventilation 6 Infiltration - 3%
7 Ventilation system - 24%
8 Window ventilation - 3%
Use 9 Hot water/ internal gains
- 28%
Buildingservices
10 Heat generation - 6%
Level 3
BuildTog - affordable buildings in nearly-zero energy performance
©LUWOGE CONSULT
SOLAR GAINS
• Optimization of orientation of the buildings
• Avoidance of massive shading due to buildings geometry
• Reduction of percentage of the window frame
• Reduction of reveal depths
• Implementation of window glasses with good g-values
HEAT RECOVERY
• Implementation of mechanical ventilation systems with effective heat recovery
• Controlling the air exchange exclusively by the ventilation system
INTERNAL GAINS
• Consideration of internal heat gains of the operation of a building
DISTRIBUTIONAL HEAT
• Implementing building services inside the thermal envelope
energy demand optimization
MAXIMIZING GAINS
-40
-30
-20
-10
0
10
20
30
40
50
60
1 2 3 4 5 6 7 8 9 10
kWh/m²a
GAINS (+ 26%) + 32%
Envelope 1 Roof
2 Wall
3 Floor
4 Windows/ Doors + 6%
5 Thermal heatbridges
Ventilation 6 Infiltration
7 Ventilation system +18%
8 Window ventilation
Use 9 Hot water/ internal gains + 7%
Buildingservices
10 Heat generation + 1%
Level 3
BuildTog - affordable buildings in nearly-zero energy performance
©LUWOGE CONSULT
Passive House criteria
NZEB │ PASSIVE HOUSE STANDARD
Nearly Zero Energy Building
in Passive House standard
• 1. HEATING/COOLING LOAD
PH/C < 10 W/m2 (physics)
or
HEATING/COOLING DEMAND
QH/C < 15 KWh/m2a (definition)
• 2. AIR TIGHTNESS
n50 < 0,6/h (efficiency)
• 3. PRIMARY ENERGY DEMAND
Qp < 120 KWh/m2a (definition)
BuildTog - affordable buildings in nearly-zero energy performance
©LUWOGE CONSULT
QH = QTransmission + QVentilation - QSolar - Qinternal
•QTransmission [KWh/m2a] =
AEnvelope [m2] * HT´ [W/m2K] * Fambient/ground * FReduction * GT [kKh/a] / ATFA [m2]
•QVentilation [KWh/m2a] =
ATFA [m2] * hRoom [m] * nV,equi,fraction [1/h] * Cair [Wh/m3K] * FReduction * GT [kKh/a] / ATFA [m2]
•QSolar [KWh/m2a] =
AWindows [m2] * Radiation [KWh/m2a] * gWindows * FReduction * hG / ATFA [m2]
•QInternal [KWh/m2a] =
0,024 [kh/d] * hd [d] * 2,1 [W/m2] * ATFA [m2] * FReduction * hG / ATFA [m2]
energy performance calculation
PHYSICS
BuildTog - affordable buildings in nearly-zero energy performance
energy balance
STANDARD BUILDING
©AN/MA / BASF France
coldest annual temperature
≥ - 1,1 °C
≥ - 6,6 °C (it)
≥ - 12,3 °C (fr, nl,uk, lu)
≥ - 17,7 °C (de)
≥ - 23,3 °C (se)
≥ - 28,8 °C
≥ - 34,5 °C
≥ - 40,0 °C
Energy Balance 40,5% -15,10 KWh/m2a
A/ATFA AEnvelope U/φ GT QT
Transmission 79,2% 177% 1.526 0,22 75 -29,5 KWh/m2a
Roof 43% 374,4 0,11 75 -3,5 11,7%
Wall 77% 666,4 0,13 75 -7,5 25,5%
Socle 4% 36 0,14 75 -0,4 1,5%
Basement 33% 288 0,17 75 -4,3 14,5%
Window 15% 129,6 0,85 75 -9,6 32,4%
Door 4% 32 0,85 75 -2,4 8,0%
Thermal Bridges 100% 864 0,025 75 -1,9 6,3%
nV V C GT QV
Ventilation 20,8% 0,125 2.160 0,33 75 -7,7 KWh/m2a
Infiltration 0,025 2.160 0,33 75 -1,5 20,0%
Mech. Ventilation 0,1 2.160 0,33 75 -6,2 80,0%
Fred. Awin. g Rad. QS
Solar Gains 52,7% 35% 129,6 0,6 375 11,69 KWh/m2a
North 10% 0,35 12,96 0,6 150 0,47 4,0%
East 20% 0,35 25,92 0,6 250 1,56 13,3%
South 50% 0,35 64,8 0,6 500 7,80 66,7%
West 20% 0,35 25,92 0,6 300 1,87 16,0%
Horizontal 0% 0,35 0 0,6 400 0,00 0,0%
Opaque 0,00 0,0%
T ATFA hd GI QI
Internal Gains 47,3% 0,024 864 210 2,1 10,5 KWh/m2a
Internal 0,024 864 210 2,1 10,5 100,0%
STANDARD
BuildTog - affordable buildings in nearly-zero energy performance
local adaption phase IX / certification
SÉNART - FR
Project owner FSM - les Foyers de
Seine-et-Marne
Architect A/NM/A
©AN/MA / BASF France
BuildTog - affordable buildings in nearly-zero energy performance
BuildTog - affordable buildings in nearly-zero energy performance
Sénart
STANDARD FLOOR
BuildTog - affordable buildings in nearly-zero energy performance
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envelope tec.
saving potential
FR - Sénart +2
location geometry
Sénart
FACADE │ VENTILATED WOOD CLADDING
Exterior
BuildTog - affordable buildings in nearly-zero energy performance
energy balance
SÉNART
©AN/MA / BASF France
Energy Balance 36,8% -13,49 KWh/m2a
A/ATFA AEnvelope U/φ GT QT
Transmission 82,4% 162% 2.398 0,27 73 -30,2 KWh/m2a
Roof 33% 489,97 0,117 73 -2,8 9,4%
Wall 82% 1206,07 0,145 73 -8,6 28,6%
Socle 5% 72,51 0,164 73 -0,3 1,0%
Basement 21% 314,75 0,176 73 -1,3 4,5%
Window 18% 266,3 0,933 73 -12,3 40,6%
Door 3% 48,28 0,873 73 -2,1 6,9%
Thermal Bridges 166% 2447,23 0,023 73 -2,8 9,2%
nV V C GT QV
Ventilation 17,6% 0,107 3.695 0,33 73 -6,4 KWh/m2a
Infiltration 0,042 3.695 0,33 73 -2,5 39,3%
Mech. Ventilation 0,065 3.695 0,33 73 -3,9 60,7%
Fred. Awin. g Rad. QS
Solar Gains 49,8% 30% 266,3 0,5 446 11,56 KWh/m2a
North 9% 0,26 24,1 0,5 155 0,31 2,7%
East 6% 0,17 16,7 0,5 307 0,28 2,4%
South 76% 0,31 202,7 0,5 507 10,24 88,5%
West 9% 0,32 22,8 0,5 313 0,73 6,3%
Horizontal 0% 0,00 0 0,5 498 0,00 0,0%
Opaque 0,00 0,0%
T ATFA hd GI QI
Internal Gains 50,2% 0,024 1478 243 2,1 11,6 KWh/m2a
Internal 0,024 1478 243 2,1 11,6 100,0%
SÉNART N/S
BuildTog - affordable buildings in nearly-zero energy performance
Sénart
DETAIL
BuildTog - affordable buildings in nearly-zero energy performance
local adaption phase VIII / construction
CHÂLONS - FR
Project owner LA RENAISSANCE IMMO-
BILIERE CHALONNAISE
Architect EXP architectes
©EXP architectes
BuildTog - affordable buildings in nearly-zero energy performance
BuildTog - affordable buildings in nearly-zero energy performance
Châlons
GROUND / STANDARD FLOOR
10 5 10 m
BuildTog - affordable buildings in nearly-zero energy performance
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envelope tec.
saving potential
FR - Châlons +3
location geometry
Châlons
FACADE │ VENTILATED METAL CLADDING
Exterior
BuildTog - affordable buildings in nearly-zero energy performance
energy balance
CHÂLONS
©AN/MA / BASF France
Energy Balance 42,7% -14,32 KWh/m2a
A/ATFA AEnvelope U/φ GT QT
Transmission 84,8% 191% 1.602 0,23 68 -28,5 KWh/m2a
Roof 41% 343,6 0,117 68 -3,3 11,4%
Wall 90% 753,5 0,131 68 -8,0 28,1%
Socle 5% 38,2 0,150 68 -0,3 0,9%
Basement 33% 277,9 0,161 68 -2,0 6,9%
Window 19% 158,6 0,914 68 -11,7 41,2%
Door 4% 30 0,690 68 -1,7 5,9%
Thermal Bridges 165% 1386,2 0,014 68 -1,6 5,5%
nV V C GT QV
Ventilation 15,2% 0,091 2.100 0,33 68 -5,1 KWh/m2a
Infiltration 0,033 2.100 0,33 68 -1,9 36,3%
Mech. Ventilation 0,058 2.100 0,33 68 -3,3 63,7%
Fred. Awin. g Rad. QS
Solar Gains 45,0% 23% 158,6 0,57 307 8,66 KWh/m2a
North 5% 0,18 8,4 0,59 123 0,13 1,5%
East 64% 0,26 101,9 0,58 329 5,96 68,8%
South 14% 0,21 22,5 0,57 419 1,33 15,4%
West 16% 0,15 25,8 0,50 184 0,42 4,8%
Horizontal 0% 0,00 0 0,00 379 0,00 0,0%
Opaque 0,83 9,5%
T ATFA hd GI QI
Internal Gains 55,0% 0,024 839,9 212 2,1 10,6 KWh/m2a
Internal 0,024 839,9 212 2,1 10,6 100,0%
CHÂLONS
BuildTog - affordable buildings in nearly-zero energy performance
Châlons
DETAIL
BuildTog - affordable buildings in nearly-zero energy performance
local adaption completed / Passive House certified
DARMSTADT - DE
Project owner Bauverein AG Darmstadt
Architect Planungsgruppe DREI
©Bauverein AG
BuildTog - affordable buildings in nearly-zero energy performance
BuildTog - affordable buildings in nearly-zero energy performance
Darmstadt
GROUND FLOOR (EXTRACT)
BuildTog - affordable buildings in nearly-zero energy performance
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envelope tec.
DE - Darmstadt +8
saving potential
location geometry
Darmstadt
FACADE │ EXT. INS. FINISHING SYSTEM (EIFS)
Exterior
BuildTog - affordable buildings in nearly-zero energy performance
energy balance
DARMSTADT
©AN/MA / BASF France
Energy Balance 33,1% -11,75 KWh/m2a
A/ATFA AEnvelope U/φ GT QT
Transmission 81,1% 140% 4.881 0,22 79 -28,8 KWh/m2a
Roof 26% 921,7 0,130 79 -2,7 9,4%
Wall Cellar 3% 103 0,607 79 -0,8 2,7%
Wall 56% 1963,4 0,128 79 -5,7 19,7%
Socle 4% 122,5 0,162 79 -0,2 0,9%
Basement 18% 635,4 0,142 79 -1,1 3,9%
Basement Garage 8% 290,4 0,138 79 -0,5 1,8%
Window 24% 844,6 0,804 79 -15,3 53,3%
Door 0% 0 0,000 79 0,0 0,0%
Thermal Bridges 79% 2767,3 0,038 79 -2,4 8,3%
nV V C GT QV
Ventilation 18,9% 0,103 8.738 0,33 79 -6,7 KWh/m2a
Infiltration 0,023 8.738 0,33 79 -1,5 22,3%
Mech. Ventilation 0,08 8.738 0,33 79 -5,2 77,7%
Fred. Awin. g Rad. QS
Solar Gains 58,2% 39% 844,5 0,53 283 13,82 KWh/m2a
North 33% 0,47 282,6 0,37 145 1,90 13,7%
East 6% 0,36 50,7 0,64 225 0,70 5,1%
South 54% 0,35 459,8 0,61 378 9,87 71,4%
West 6% 0,32 51,4 0,64 242 0,68 4,9%
Horizontal 0% 0,00 0 0,00 355 0,00 0,0%
Opaque 0,68 4,9%
T ATFA hd GI QI
Internal Gains 41,8% 0,024 3495 212 2,1 9,9 KWh/m2a
Internal 0,024 3495 212 2,1 9,9 100,0%
DARMSTADT
BuildTog - affordable buildings in nearly-zero energy performance
Darmstadt
DETAIL
BuildTog - affordable buildings in nearly-zero energy performance
building performance
PROJECT TARGET COMPARISON
A = architectural quality
E = energy efficiency
C = cost efficiency A E C A E C A E C
Baseline
Standard Building 100% 115% 110% 105% 115% 110% 110% 105% 105%
75% high
100% standard 10 95% 10 104% 10 100% 10 96% 10 100% 10 103% 10 99% 10 89% 10 97%
125% low
structure 1 90% 1 110% 1 90% 1 95% 1 110% 1 90% 1 110% 1 85% 1 85%
exterior design 1 75% 1 110% 1 125% 1 80% 1 110% 1 125% 1 90% 1 100% 1 110%
interior design 1 110% 1 100% 1 90% 1 110% 1 100% 1 90% 1 90% 1 100% 1 110%
detailing 1 75% 1 115% 1 90% 1 75% 1 90% 1 90% 1 90% 1 75% 1 90%
construction 1 110% 1 125% 1 100% 1 100% 1 100% 1 100% 1 100% 1 75% 1 100%
place 1 100% 1 90% 1 90% 1 100% 1 100% 1 100% 1 110% 1 110% 1 95%
use 1 100% 1 100% 1 100% 1 100% 1 100% 1 100% 1 100% 1 100% 1 100%
size 1 100% 1 85% 1 90% 1 100% 1 110% 1 110% 1 100% 1 75% 1 90%
standard 1 110% 1 75% 1 120% 1 110% 1 75% 1 120% 1 100% 1 90% 1 110%
experience 1 75% 1 125% 1 100% 1 85% 1 100% 1 100% 1 100% 1 75% 1 75%
107%110%108%
DE-DARMSTADT
99% 99% 95%
FR-SÉNART FR-CHÂLONS
BuildTog - affordable buildings in nearly-zero energy performance
building performance
SCORING
CE
A
S
D
C
100%
95%
110%
105%
SÈNART
• ARCHITECTURE 95%
• ENERGY 104%
• COSTS 100%
CHÂLONS
• ARCHITECTURE 96%
• ENERGY 100%
• COSTS 103%
DARMSTADT
• ARCHITECTURE 99%
• ENERGY 89%
• COSTS 97%
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