Kurt Emil Eriksen VELUX AS

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Energy Efficiency in the refurbishment of
High-Rise Residential Buildings
Kurt Emil Eriksen VELUX A/S The role of buildings
meeting the 2020 target 12 March 2009
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Background for the study
One in six dwellings in Europe 36 million are
in high-rise buildings up to 50 of the
population live in them in some countries 19 out
of 27 housing ministries respondent to the VROM
survey regard poor energy efficiency as a
moderate to major problem This project
investigates energy efficiency as part of general
refurbishment and was funded by IEA and
EuroACE. Project carried out by the Association
for the Conservation of Energy (ACE) in London
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Purpose

• The purpose is to
• identify the potential for energy saving in
  multi-storey buildings with more than 4 floors
• identify the costs and payback for the
  investments
• identify barriers and opportunities for
  renovating

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Regions in the study
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Case studies
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Measures included in the case studies
Before

• Improvements to the building fabric
• - Wall insulation
• - Roof insulation
• - Floor insulation
• - Window replacement
• Improvements to the heating system
• - Thermostatic radiator valves and balancing
  valves
• - Boiler replacements

After
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Measures NOT included in the case studies
Improvements to the building fabric - External
solar shading - Effect of insulation on reducing
cooling demand Improvements to the heating
system - Combined heat and power and biomass
heating, solar energy for heating Reducing
cooling demand - Passive solar design,
ventilation, reducing internal heat loads,
increasing building albedo Other measures -
Lighting - Ventilation strategies (natural, heat
recovery)
Before
After
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Calculated savings pr region and measure
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Investment costs pr region and measure
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Energy and retrofit related costs pr region and
measure
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Annualized cost and savings pr region and measure
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Case Studies
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Case Study Sct. Petersburg
Financial support from a housing fund established
by the Danish government. Companies
participating VELUX A/S, Danfoss, Rockwool and
Grundfos
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Case Study Sct. Petersburg
Low energy windows
Control systems
New attic
Floor insulation
New heating system
External wall insulation
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Case Study Sct. Petersburg
OLD BUILDING Total yearly energy
consumption 919.388 kWh/year 323
kWh/m2/year NEW BUILDING Total yearly
energy consumption 450.743 kWh/year 158
kWh/m2/year
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Conclusion
On cost-effective basis the study identifies a
Europe-wide cost-effective energy saving
potential of 28 from energy-efficient
refurbishment of the high-rise residential
buildings. Attainment of this potential would
imply a 1.5 reduction of Europes total final
energy demand and annual reduction of emissions
by 35 MtCO2 Main barriers is the owner/tenant
situation, lack of finance to support high-rise
renovation as well as a public subsidized price
for energy.
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Background
DOWNLOAD from www.euroace.org/highrise