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Super-energy wrap-up model for renovation of standard wooden houses in Greenland 1 DTU Byg Super-energy wrap-up model for renovation of standard wooden houses in Greenland Søren Peter Bjarløv Petra Vladykova November 12, 2012 7 th International HVAC Cold Climate Conference 2012
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Super-energy wrap-up model for renovation of standard wooden houses in Greenland 1
DT
U B
yg
Super-energy wrap-up model
for renovation of standard wooden houses
in Greenland
Søren Peter Bjarløv
Petra Vladykova
November 12, 2012
7th International HVAC Cold Climate Conference 2012
Super-energy wrap-up model for renovation of standard wooden houses in Greenland 2
► Learning Objectives
Highly applicable renovation package solution for more than half of the
housing stock in Greenland with a potential for the Arctic regions
Method for energy savings, substantial reduction of green house emission
and high improvement of indoor climate
Retrofitting method which respects the architecture and heritage of the
Greenlandic standard wooden family houses
► AIA disclaimer ASHRAE is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit
earned on completion for non-AIA members are available on request.
This program is registered with the AIA/ASHRAE for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction of any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
Learning objectives and AIA disclaimer
Background Standard family houses Strategy and drawings Umbrella project
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► Background for Greenland
► “Typehouse” project
► Wrap-up of the typehouses
► Further work and “Umbrella” project
Content
Background Standard family houses Strategy and drawings Umbrella project
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Distribution of standard family houses
Background Standard family houses Strategy and drawings Umbrella project
0
50
100
150
200
250
300
Am
ou
nt
of
typ
e h
ou
ses
terraced
houses; 1,946
other;
8,497
detached and
semi-detached
house:
Period 1; 6,479 detached and
semi-detached
house:
Period 2; 4,973
detached and
semi-detached
house:
Period 3; 180
detached and
semi-detached
houses;
11,632
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Types of standard family houses
Background Standard family houses Strategy and drawings Umbrella project
Type 2 Type 5 Type 14
Type 16 Type 18D Type 19
Type 25D Type 67
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► Sound structure but thermal bridges
(single-stud system)
► Not sufficient insulation
(100 mm of mineral wool insulation,
U-value ≈ 0.434-0.497 W/(m2.K))
► Natural ventilation through vents
(150 x 150 mm in every room)
► Air leakage
(n50 = 11.3 – 18.5 h-1)
Facts I.
Background Standard family houses Strategy and drawings Umbrella project
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Facts II.
Background Standard family houses Strategy and drawings Umbrella project
15
20
25
30
35
Nov-10 Dec-10 Dec-10 Jan-11 Mar-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11
Tem
per
atu
re [°C
]
1. 18D - Temp in living room N 2. 18D - Temp in bedroom N&W
2
1
10
20
30
40
50
60
Nov-10 Dec-10 Dec-10 Jan-11 Mar-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11
Rel
ati
ve
hu
mid
ity
[%
]
1. 18D - RH in living rooom N&W 3. 18D - RH in bedroom N
1
3
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► Documented in Greenland…..
241 to 381 kWh/(m2.a) or up to 120,800 Btu/(ft2.a) respectively
≈ 1,600 – 2,200 liters of oil or or up to 581 gallons of oil per year respectively
≈ 217 GWh/year energy use in buildings
≈ potential reduction of CO2 (53,000 metric tones of GHG emission in
buildings)
► Theoretical energy consumption (≈ 40-60 kWh/(m2.a) or 12,680-19,000
Btu/(ft2.a) respectively) for 18D and how to reach it…..
Energy consumption
Background Standard family houses Strategy and drawings Umbrella project
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► Original package
Typehouses of very good quality
Detailed planning and documentation
Repeated and developed for durability
► New wrap-up package
Wrapping of old typehouse
Detailed planning and documentation
Repeated and (hopefully) developed into durability
The package
Background Standard family houses Strategy and drawings Umbrella project
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► Why
Increasing problems with mould
Failed attempt to retrofit by extra insulation after oil crisis (no air tightness)
Building authorities need proof of a durable solution
► How
Set up a project in cooperation with Greenlandic authorities
Fundraising
Full scale model
► Model
18D – one of the most common typehouses in Greenland
► Research project with researchers and students at the Technical
University of Denmark
Project
Background Standard family houses Strategy and drawings Umbrella project
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18D
Background Standard family houses Strategy and drawings Umbrella project
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Principal of energy renovation for standard
houses
Background Standard family houses Strategy and drawings Umbrella project
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Ground floor plan
Background Standard family houses Strategy and drawings Umbrella project
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Airtight and vapour
membrane
Background Standard family houses Strategy and drawings Umbrella project
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System for cladding and insulation
Background Standard family houses Strategy and drawings Umbrella project
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Insulation and cladding system
Background Standard family houses Strategy and drawings Umbrella project
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Insulation and cladding system
Background Standard family houses Strategy and drawings Umbrella project
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Window
Background Standard family houses Strategy and drawings Umbrella project
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► Indoor climate improvements
Expected better thermal stability of the typehouses (Ti,avg ≈
20.0-23.0°C/68-73°F and RHi,avg ≈ 30.0-35.0%)
► Energy savings
Existing buildings up to 381 kWh/(m2.a) just for space heating
(120,800 Btu/ft2.a respectively)
Wrap-up solution up to 40-60 kWh/(m2.a) for heating and partly for hot
water consumption (or 12,680-19,000 Btu/ft2.a respectively)
► Greenhouse gas emissions (GHG)
All 11,452 houses -> savings equals to 87% per year, i.e. 703 tonnes of GHG
emissions per m2 per year
► Architectural expression and heritage
► Span across the Arctic regions
Benefits of the package solution
Background Standard family houses Strategy and drawings Umbrella project
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► Documented average energy consumption
Greenland: 416 kWh/(m2.a) with 65.5 m2
Norway: 181 kWh/(m2.a) with 119 m2
Canada: 231 kWh/(m2.a) with 134 m2
► ”Umbrella”
To embrace the Arctic regions
To network and share the knowledge to:
To improve the standards of the houses
To accomplish better indoor environment
To save energy
To decrease CO2 emissions
“Umbrella” project
Background Standard family houses Strategy and drawings Umbrella project
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► How to find us?
Go to www.LinkedIn.com and search for the group:
”Renovation of standard wooden family houses in Arctic regions”
Resources
Background Standard family houses Strategy and drawings Umbrella project
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► Søren Peter Bjarløv, Associate Professor at the Technical University of
Denmark (DTU), [email protected]
► Petra Vladykova, Ph.D., Technical University of Denmark (DTU),
Denmark, [email protected]
Thank you. Questions?
Background Standard family houses Strategy and drawings Umbrella project
