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Den Integrerede Renovering Proces (IRP) Et supportværktøj mod bæredygtige hjem
Strategisk Energiplanlægning 2.0: Omstilling af energien i områder uden kollektiv energiforsyning
27 november 2014
Nicolas Galiotto
Bæredygtighedskonsulent, ph.d. Årstiderne Arkitekter
1
2
Introduction
Final energy use
3
www.kyotherm.com
4
-50%
-42%
-19%
-25%
-42%
-46%
Danish building regulations & energy requirements
5
Energy renovation
Energy renovation
Focus on energy and economy (quantitative values)
- Improve energy performance of the building
- Economically interesting
Qualitative aspects are often seen as secondary benefits
6
www.o-e-s.co.uk
Reasons for completing home renovation
7 Source: Adjei 2011
8
In 2010, we had in the European Union:
• < 1% of the building stock renovated yearly
• ~95% were minor or conventional energy renovations
• ~5% were deep energy renovations
Until 2050, in order to comply with the EU goals, we need:
• ~2,5% of the building stock renovated yearly
• ~90% of deep to nearly zero energy renovations
• ~10% of minor or conventional energy renovations
Potential in the energy renovation sector
Barriers to energy renovation
– Politico-economic barriers
– Technical barriers
– Behavioural barriers
9
www.cena1212.wordpress.com
Politico-economic barriers are being addressed by policy makers and market developers.
Most technical barriers are being addressed by the building industry.
Behavioural barriers directly impact building owners, occupants and professionals.
Examples of behavioural barriers
• Limited knowledge
• Lack of interest
• Lack of guidance
• Lack of confidence
• Lack of social and emotional understanding
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Hypotheses
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Could a more holistic methodology be the key in overcoming behavioural barriers to high performance home renovation? Could we integrate the home occupants in the centre of the decision-making process using an adapted language?
Overcoming barriers to energy renovation
• Need for contributions from all parties • Need for interdisciplinary collaborations
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The concept of sustainable renovation
• More holistic approach
• Better integrate building occupants
• One-step and stepwise renovation
13
More focus on immaterial aspects of sustainability
Decision-making problem
What is the best renovation scenario?
– Non-expert decision makers
– Homeowners very involved
– Homeowners very emotional
– Small project with few resources
14
Decision support methods applicable to sustainable renovation
SEMI-STRUCTURED PROBLEM
Selection of the best renovation scenario
CRITERIA Multiple conflicting
Both qualitative and quantitative Candidate to be solved by multi-criteria decision-making
methods (MCDM)
15
What are multi-criteria decision-making methods used for?
• Purpose: Identify the most appropriate solution out of a set of
alternatives • Specificity: Alternatives are characterised by multiple and possibly
conflicting attributes. • Categories: Support or optimisation
– Organise information for decision situations – Add structure to decisions – Interact between decision makers – Expand the decision maker's horizons
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The Integrated Renovation Process (IRP)
The Integrated Renovation Process
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• Decision support tool
• Adapted to non-expert decision makers
• User customised
• Makes benefits from quality renovations clear and assessable
• Encourage communication between project stakeholders
• Encourage knowledge discovering
The Integrated Renovation Process
Iterative process in 3 phases:
• Study of homeowners’ values and house profiling
• Generation and evaluation of renovation strategies
• Synthesis & selection of the best strategy
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Study of homeowners’ values and house profiling
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• Semi-open questions
– Functionality
– Aesthetics
– Usability
– Safety
– Economy
– Indoor environment
– Artistic values
– Degradation & obsolescence
– Etc.
The Integrated Renovation Process
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Home before renovation
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Home coaching
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House (building)
Homeowners (occupants)
The Integrated Renovation Process Evaluation scales
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Evaluator Building expert Homeowners
Type scale Qualitative Quantitative Qualitative Quantitative
A
Favourable
Excellent Expert data 1 Very satisfied Much better
than threshold 1
B Good Expert data 2 Quite satisfied Lightly better
than threshold 1
C
Neutral
Better than neutral
but not good Expert data 3 Satisfied if
minor changes
Lightly worse
than threshold 1
D Neutral Expert data 4 Neutral Neutral
E Worse than neutral
but not poor Expert data 5 Not neutral -
not dissatisfied
Lightly better
than threshold 2
F
Unfavourable
Poor Expert data 6 Quite
dissatisfied
Lightly worse
than threshold 2
G Very poor Expert data 7 Very
dissatisfied
Much worse
than threshold 2
Expert evaluation of the house in existing conditions
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Expert evaluation of the house in existing conditions
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Expert evaluation of the house in existing conditions
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Homeowners-expert evaluation of the house in existing conditions
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• What is for you thermal comfort?
• Have you ever had cold feet?
• What is your experience with the temperature in the house?
• How do you feel?
• Etc.
Homeowners-expert evaluation of the house in existing conditions
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Homeowners-expert evaluation of the house in existing conditions
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Homeowners-expert evaluation of the house in existing conditions
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Homeowners-expert evaluation of the house in existing conditions
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What are the options to improve the house?
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• Home in existing conditions, strategy 1, strategy 2,
strategy 3, etc.
Source: www.archiexpo.com www.depositphotos.com www.clipartpanda.com
34
Evaluation of prospective buildings
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Evaluation of prospective buildings
Evaluation of prospective buildings
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Evaluation of prospective buildings
• Open dialogue
– What type of spatial configurations can I get in “Scenario 2”?
– Could we insert the demolition of the inner walls in “Scenario 1”?
– Can we get this modern look in “Scenario 2”?
– What would be the cost of integrating the finishing materials of
“Scenario 3” in “Scenario 2”?
38
Evaluation of prospective buildings
Evaluations for all criteria (case study 1)
39
CASE STUDY No. 1
Technical
aspects IEQ Immaterial values Economics
De
gradatio
n
Ob
sole
scen
ce
Ene
rgy pe
rform
ance
Ind
oo
r air qu
ality
The
rmal co
mfo
rt
Visu
al com
fort
Aco
ustic co
mfo
rt
Use
r con
trol
He
althy h
om
e
Fun
ction
s
Ae
sthetic
Mo
de
rnisatio
n
Pre
servatio
n
Emo
tion
al
Bu
dget
Ene
rgy costs
Plu
s-value
Scenario 0 G G G G F F F F E G F G A A A G G
Scenario 1 E E F E D E E B C G F E A A A E C
Scenario 2 C C C B C B A B A D F B E C A B B
Scenario 3 A A A A A A A A A A A A E C D A B
Synthesis of the comfort and health
evaluations before renovation
40
Global synthesis for building after
renovation (scenario 1)
41
• Aggregations in homeowners’ minds • Aggregations using aggregation rules).
Presentation of the results (case study 1)
42
Selection of the most favourable scenario
(case study 1)
43
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Konklusioner
• Hjemme-coaching: HJEM, ikke HUS!
• Husejerne:
• Var mere informerede og mere interesserede
• Følte i kontrol samtidig med at beslutte
• De forstod og fornemmede de mange fordele
• De fandt sprog veltilpasset
• De valgte den bedste renovering strategi ifølge dem
• Flere case undersøgelser er stadig nødvendige for at teste
værktøjet…
Tak for opmærksomheden
Tøv ikke med at stille dine spørgsmål!
45
Nicolas Galiotto Bæredygtighedskonsulent, ph.d.
Årstiderne Arkitekter - www.aarstiderne.dk
mail: [email protected] - mobil: +45 2924 1017
Google søgeord :
VBN Integrated Renovation Process case studies