College Bouwfysisch Ontwerpen 2: Koudebruggen

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College Bouwfysisch Ontwerpen 2 Koudebruggen

• Henk Schellen
• 2003

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Renovation and thermal retrofiting

• Henk Schellen
• Eindhoven University of Technology

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Research on EnergyHolland 1977-1987
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Introduction

• 1987
• Stichting WoonEnergie 10 years of research on
  energy in Holland
• Thermal improvement of housing
• complexity of starting point
• lack of knowledge,
• understanding and
• experience

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Introduction

• 1997
• Increasing knowledge, understanding, experience
  and technical instruments
• Checking of thermal and hygrical quality
• during design
• afterwards

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Improvement of housing

• Categories of housing for governmental subsidies
• before World War II
• from 1945 to 1968
• after 1968

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Insulation older housing

• Construction details
• simple
• no thermal insulation
• thermal bridges

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Supporting concrete beams
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Roof edges
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Balconies
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Consoles of galeries
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Insulation of the outer shell

• Simple insulation
• Insulation of the cavity
• Single to double glazing
• Insulation of flat or pitched roofs
• Insulation of ground floor

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First insulation projects

• Underestimation of thermal bridging
• condensation
• mould growing
• healthness problems
• deterioration of wall covering

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More drastic approach

• external insulation
• new external facade with cavity insulation
• wrap around insulation
• supporting concrete beams,
• lintels,
• galeries,
• balkonies.

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New facade with insulation
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More complex details
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Thermal bridge programs

• Calculation of extra energy losses
• Calculation of surface temperatures
• Calculation of condensation risks
• 2 dimensional
• 3 dimensional

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Thermal bridge in glazing
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Thermal bridge programs
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Thermal bridge guides
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KOBRAthermal bridge guide
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KOBRAthermal bridge guide
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KOBRAthermal bridge guide
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KOBRAthermal bridge guide
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Koudebrugonderbreking?
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Koudebrugonderbreking

• Thermische scheiding van de balkonplaat
• f-factor gt 0,65 (NEN 2778)
• Bouwfysische probleemloze uitvoering, verhindert
  betonscheuren ten gevolge van onderling
  verschillende uitzettingen ter plaatse van de
  balkonaansluiting
• Warmteverlies tot minimum beperkt
• Voldoet aan bouwbesluit

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Koudebrugonderbreking
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Koudebrugonderbreking
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Koudebrugonderbreking
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Koudebrugonderbreking
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Koudebrugonderbreking?
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WAVO heat and moisture


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WUFI heat and moisture
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Rembrandt huis
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WUFI Rembrandt home
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WUFI Rembrandt home
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Mould growing
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West-wall
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Non-insulated West-wall
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WUFI Rembrandt huis
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Non-insulated West-wall
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Non-insulated West-wall
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Insulated West-wall
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Insulated West-wall
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Insulated West-wall
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Beam in wall non-insulated
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Beam in wall insulated
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Beam in wall insulated with electrical heating
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Beam in wall insulated with electrical heating
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FLUENT CFD
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FLUENT CFD
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FLUENT CFD
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Thermographics
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Thermographics

• Boxmeer well insulated

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Thermographics

• Afterwards insulated vs. not insulated

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Non-insulated
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Afterwards insulated
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Non-insulated
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Woningen Nageisoleerd versus ongeisoleerd
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Thermographics

• External insulation

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Thermographics

• Internal insulation

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Thermographics

• Insulation in cavity

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Thermographics

• Insulation in cavity

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Thermographics
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Thermographics

• No insulation

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Project Vught

• Renovatie van 140 woningen in Vught

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Exterieur voor renovatie
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Voor renovatie gemeten
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Voor renovatie berekend
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Interieur voor renovatie
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Voor renovatie gemeten
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Voor renovatie berekend
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Exterieur na renovatie
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Na renovatie berekend
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Na renovatie gemeten
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Interieur na renovatie
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Na renovatie berekend
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Na renovatie gemeten