Maximising energy efficiency in residential design by Geoff Clark
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Maximising energy efficiency in residential design Geoff Clark, Troppo Architects Informed materials specification and thermal performance in timber frame designs can increase housing star ratings and lower operational energy costs.
Transcript of Maximising energy efficiency in residential design by Geoff Clark
Inspiring Sustainable Design
Geoff ClarkTroppo Architects – Global Award for Sustainable Architecture
Senior LecturerSchool of Architecture and DesignUniversity of Tasmania
Geoff Clark
Inspiring SustainableDesigns
Maximising Energy Efficiency in Residential Design
Maximising Energy Efficiency in Residential Design Things we know: Thermal Facts
Thicker insulation will reduce the transmission of heat energy compared with thinner insulation
Thermally massive materials will store more heat than less thermally massive materials
A longer wall facing the north will achieve greater direct solar gain than a shorter wall
Maximising Energy Efficiency in Residential Design More square metres of building fabric will lose more heat in winter than less square metres of building fabric
Darker colours convert light to heat energy more efficiently than lighter colours
Reflective finishes emit less than matt finishes
Translucent or transparent materials can allow the ingress of short wave radiation for conversion to heat
Maximising Energy Efficiency in Residential Design What the numbers say:
R - Value m2K/W
Thermal Mass kJ/m3K
Time Lag Hrs
Emissivity
Absorptivity
Reflectivity
Maximising Energy Efficiency in Residential Design What the numbers say:
R - Value m2K/W
Wood 25mm 0.12 - 0.25
Concrete 100mm 0.07
Glass 6mm 0.006
Still air layer 0.14
Fibreglass insulation 3.5
Maximising Energy Efficiency in Residential Design What the numbers say:
Thermal Mass kJ/m3K
Concrete 2060
AAC 550
Fibreglass insulation 9
Water 4186
Wood 904
Maximising Energy Efficiency in Residential Design What the numbers say:
Time Lag Thickness Hrs
Wood 20mm 0.4
Concrete 200mm 6AAC 200mm 7
Clay 2000mm 1500
Maximising Energy Efficiency in Residential Design What the numbers say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Disposition
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Disposition
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Disposition
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Disposition
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design
What the numbers don’t say:
Maximising Energy Efficiency in Residential Design
What the numbers don’t say:
Maximising Energy Efficiency in Residential Design
What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design
What the numbers don’t say:
Maximising Energy Efficiency in Residential Design What the numbers don’t say:
Maximising Energy Efficiency in Residential Design
What the numbers don’t say:
Maximising Energy Efficiency in Residential Design
Inspiring Sustainable Designs
Geoff ClarkTroppo Architects – Global Award for Sustainable Architecture
Senior LecturerSchool of Architecture and DesignUniversity of Tasmania
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