Rain Kimmel
Skirmante Stankeviciute
Natasa Ilic
Lucie Riffort
•
•
•
•
•
Sustainable Refurbishment, Retrofit Energy Management in Housing
Habitat loss and
fragmentation
Illegal hunting and trade
Capture of wild
elephants
Genetic threat
Disease
2

Energy efficiency task




Façade/gable/roof/balconies insulation
Thermal bridge solutions
U value calculation & heat loss frame
Cost calculations
 Heating
task
Existing heating system and main
problems
Sustainabl
 Solutions for heating source and type
 Cost

 Green
roof
Inverted Roof
Extensive green roof
 Intensive green roof


 Building services
Sustainable Refurbishment, Retrofit Energy Management in Housing
3
•
•
•
•
•
Sustainable Refurbishment, Retrofit Energy Management in Housing
Existing energy
efficiency class < D
Energy consumption
No ventilation
Indoor climate does not
meet the requirements
Old heating system
4
Façade/gable/roof/balconies
insulation
 Thermal bridge solutions
 U value calculation & heat loss
frame
 Cost calculations

Sustainable Refurbishment, Retrofit Energy Management in Housing
5
Current situation
Annual heating energy demand
241,8KWh/m²*year
 Thermal conductivities (U-values)

 Wall 2,8 W/m²*K
 Roof 0,65 W/m²*K
 Windows 3,0 W/m²*K
Sustainable Refurbishment, Retrofit Energy Management in Housing
6
Thermal bridges
Window/
External
wall
External
wall/
ceiling
External
wall
Sustainable Refurbishment, Retrofit Energy Management in Housing
7
Renovation recommendation
U-value 0,125 W/m²*K
Sustainable Refurbishment, Retrofit Energy Management in Housing
8
Thermal bridges
Balconies closed with windows
Sustainable Refurbishment, Retrofit Energy Management in Housing
9

Roof
400mm of rockwool
 SBS
 Drainage layer
 Soil 100mm


Windows
 U=0,77 W/m²K

Basement 100mm
Sustainable Refurbishment, Retrofit Energy Management in Housing
10

Current heating energy demand
241,8KWh/m²*year
After renovation
25,49KWh/m²*year
Sustainable Refurbishment, Retrofit Energy Management in Housing
11
Profitability
Considering loan interests and rise
of energy prices
 Retrofitting pays off in 13 years
 Also better indoor climate
 Less CO2 emissions from heating

Sustainable Refurbishment, Retrofit Energy Management in Housing
12
Existing heating system and main
problems
 Solutions for heating source and
type
 Solar wall
 Geothermal heating
 Radiators renewal
 Cost

Sustainable Refurbishment, Retrofit Energy Management in Housing
13
Old
• Rapidly increasing prices
• CO2 emission
• Temperature depends on
local governance
• Inefficiency
• Low comfort level
•
Sustainable Refurbishment, Retrofit Energy Management in Housing
14
Solutions for heating source and type
Heating sources
• Burning other renewable
energy source
• Solar energy
• Wind turbines
• Geothermal heat pumps
• Combine heating
Sustainable Refurbishment, Retrofit Energy Management in Housing
Heating types
• Floor heating
• Radiators renewal
15
•
•
•
•
•
•
Sustainable Refurbishment, Retrofit Energy Management in Housing
Less cost then solar
panels/collectors
Use passive solar
energy
Can be use as facade
and insulation material
Works as ventilation
and heating system at
the same time
Needed 156 m2 of
Solar Wall
1 m2 wall reduces
normal heating cost
about 131 Lt per year
16
Energy clean, sustainable
and free
• Use heat from ground
(not geothermal water)
• Need electricity to pump
the heat
• Heat pump 40 kW
• Drills about 140 m
• Will be used for building
heating
•
Sustainable Refurbishment, Retrofit Energy Management in Housing
17
Keep and use old
radiators
• Cost 1/5 full radiators
renewal
• Thermostatic head
installed on old radiators
• Energy demand - 10%
less
• More comfort
•
Sustainable Refurbishment, Retrofit Energy Management in Housing
18
Cost
Cost
Saves per year
Solar Wall
51 792 Lt
20 500 Lt
Geothermal pumps
84 000 Lt
28 000 Lt
Radiators
-----
-----
Sustainable Refurbishment, Retrofit Energy Management in Housing
19
Inverted roof
Thermal insulation laid
over the waterproofing
layer
 If the structure
incorporates a concrete
slab it will normally be
cost-effective to design
the slab to support the
load of 80 - 120 kg/m2
imposed by a ballasted
inverted roof system

Sustainable Refurbishment, Retrofit Energy Management in Housing
20
Intensive green roof
 Planting
media –
minimum 30 cm deep
 Weights ranging from
120 to 200 kilograms
per square meter
 Almost always used
for new construction
Sustainable Refurbishment, Retrofit Energy Management in Housing
2121
Extensive green roof
 Saturated weight
of 8
to 40 kilograms per
square meter
 Planting media of 3 to
12 cm thick
 Most extensive green
roofs are not designed
for public access
Sustainable Refurbishment, Retrofit Energy Management in Housing
22 22
Construction of green roof
Sustainable Refurbishment, Retrofit Energy Management in Housing
23
Green roof benefits
Insulation – energy cost reduction
 Building acoustics
 Storm water retention
 Lasts longer & lower maintenance
costs
 Open space
 Habitat

Sustainable Refurbishment, Retrofit Energy Management in Housing
24

Mechanical ventilation with heat recovery system

Too much ventilation
discomfort
Excessive energy use

Too little ventilation
moisture
Condensation and mould growth
MVHR
ventilation control
Sustainable Refurbishment, Retrofit, Energy
Management in Housing
25
Sustainable Refurbishment, Retrofit, Energy
Management in Housing
26

Sun’s energy to pre-heat ventilation air

1761 sun hours / year

30+ years lifespan

No maintenance
Sustainable Refurbishment, Retrofit, Energy
Management in Housing
27
Sustainable Refurbishment, Retrofit, Energy
Management in Housing
28
The majority of our existing stock
requires some level of retrofit to
enable us to live and work more
sustainably. In this project we
suggest reachable ways to make our
homes more sustainable.
Sustainable Refurbishment, Retrofit Energy Management in Housing
29
Thank You for Your Attention