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Master thesis presentation

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Sara Ewida

on 23 June 2013

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Transcript of Master thesis presentation

"Case Studies: Timber Frame and Modern Buildings, Wolfhagen, Germany"
A Study of the Effect of Existing Residential
Buildings' Envelope and Heating Systems'
Refurbishments on Energy Consumption
By
Arch. Eng. Sarah Atef Ewida
M.Sc. Renewable energy & Energy efficiency



 
BSCairo2013 conference
Towards Sustainable & Green Built Environment
Energy in buildings

23 June 2013
Introduction
4.2 Modern building Refurbishments
Source: dena(German energy agency) Pilot Project „Efficient Homes“, 2011
CONTENTS
1. Introduction
2. Methodology
3. Case Studies investigations
4. Refurbishment Measures
5. Conclusions
6. Future Recommendations
Problem Statement
Thank you for your attention
Problem 1
Problem 2
Research Question

(i.e., façade, floor, roof...etc)
Research objective
Methodology
Introduction
Introduction
Introduction
Refurbishment Scenarios
Case studies investigations
Case Studies selection
1. Introduction
2. Methodology
Contents
3. Case Studies investigations
4. Refurbishment Measures
5. Conclusions
6. Future Recommendations
4.1 Timber Frame building Refurbishments
Conclusions
Timber frame building
Modern building
Future Recommendations
4.3 COMPARISON of Refurbishment scenarios of Timber frame and modern buildings
All building components
Calculations for all possible cases
not the study’s objective
each project is unique
BUILDINGS
Towards
ENERGY
EFFICIENCY
1. Introduction
2. Methodology
3. Case Studies investigations
3.1 Timber frame building
3.2 Modern building
4. Refurbishment Measures
5. Conclusions
6. Future Recommendations
Contents
Contents
1. Introduction
2. Methodology
3. Case Studies investigations
4. Refurbishment Measures
4.1 Timber frame building
4.2 Modern building
5. Conclusions
6. Future Recommendations
Contents
1. Introduction
2. Methodology
3. Case Studies investigations
4. Refurbishment Measures
5. Conclusions
6. Future Recommendations
1. Introduction
2. Methodology
3. Case Studies investigations
4. Refurbishment Measures
Contents
Case studies investigations
Methodology
Critical Increase of Annual heating Energy and primary energy demands of the building sector in Germany
Building Refurbishment confinement in Germany
Source: K. Höttges, A. Maas, and G. Hauser, “German Energy Conservation Regulation - basics and examples,” Kassel, Germany
=
Building envelope
Heating system
EW U-values are the least in scenario 2
Refurbishment Measures
Economic study
affecting energy demand
Highest HT' reduction in Scenario 1
Timber Frame building components U-values
Modern building components U-values
in Timber frame and Modern building scenarios
in Timber frame and Modern buildings scenarios
EW U-values are the least in scenario 2
HT' of modern building less in
current status and scenarios
Qh" of timber frame building less in current status and scenario 1
Small difference between the scenarios in each building
Basement ceiling not a refurbishment priority
Facade can be refurbished
6. Future recommendations
2
3
4
5
6
7
8
9
10
13
Other heat losses and heat gains to be considered
Refurbishment measures
Thermal insulation
thicknesses
Heating energy saving
Transmission heat loss reduction
CONTRIBUTION
Introduction
Refurbishment measures
Refurbishment measures
GREAT POTENTIALS for saving
11
Primary energy saving
Transmission heat loss
Ventilation heat loss
Internal heat gain
Transparent component heat gain
HEATING DEMAND
PRIMARY ENERGY DEMAND
Heating energy
EW 120 mm
UC 40 mm
C 40 mm
EW+120 mm
=1.35
EW+60 mm
All components
EW+W+UC
EW+W
Scenarios
=0.045
TB
Qh"
50%
42%
Qp"
5. Conclusion
Saving
4.3 COMPARISON of refurbishment scenarios of Timber frame and
modern buildings
Future Recommendations
Conclusions
Refurbishment measures
Other considerations
Sources:
“Energieberatungsbericht, Pfarrhaus in Wolfhagen.” Bad Arolsen, Germany, 2009
“Energieberatungsbericht, Pfarrhaus II in Wolfhagen.” Bad Arolsen, Germany, 2008
All components
EW 120 mm
EW+W
EW+20 mm
Scenarios
C 40 mm
Cant. 40 mm
=0.035
All sc.
1
for
Windows
glazing
4. Refurbishment Measures
4. Refurbishment Measures
4. Refurbishment Measures
ep
and
Saving
When reducing
(Ratio of expenditure)
Qh"=Qh/AN
Variety of building envelope component
combinations
Heating system refurbishment
-Values
U-Values
(Heat transfer coefficient)
How to
improve the Refurbishment effectiveness
to reduce the heating and primary energy demands of the two case study buildings in Wolfhagen
Developing
"Integrative"
building refurbishment
?
Percentages
Timber
Modern
1
2
3
1
2
3
Destatis(Das Statistische Bundesamt ), “Bauen und Wohnen, Mikrozensus - Zusatzerhebung 2006, Bestand und Struktur der Wohneinheiten, Wohnsituation der Haushalte,” 2008
dena(German energy agency), “dena’s pilot project dena ’ s pilot project „ Efficient Homes “.,” 2003
“The impact of climate change uncertainties on the performance of energy efficiency measures applied to dwellings,” Energy and Buildings, pp. 982–995, 2005
Sources:
/A
3
4.6
2.9
Thesis Scope
Wood pellet heating system of low
5%
7%
2%
Conclusions
Facade
All except basement ceiling
Scenario 1
Scenario 2
Scenario 3
Scenario 1
Scenario 2
All building components
Facade
12
Highest Qh"
reduction in
Scenario 1
48%
Qh"
Timber frame
Modern building
46%
Full transcript