Thermal Building Design Wall Design and Heat Transfer Analysis.

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Common Components of a Traditional Wood Framed Building

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Presentation transcript:

Thermal Building Design Wall Design and Heat Transfer Analysis

Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Polystyrene Insulation Asphalt Roof Shingles Plywood Sheathing Tar Paper Roof Design

Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Polystyrene Insulation Asphalt Roof Shingles Plywood Sheathing Tar Paper Roof Component Heat Transfer Method MaterialThickness Thermal Conductivity (W/mK) R-Value (m 2 K/W) inchesmillimeters Between Studs At Studs Inside FilmConductionInside Film 0.12 WallboardConduction Gypsum Board Insulation Spray Applied ConductionGlass Fiber Insulation Board and Slab ConductionPolystyrene StudConductionSpruce PlywoodConductionPlywood RoofingConductionAsphalt Outside FilmConvectionOutside Film 0.03 Total Thickness (in) Total Thickness (m) R-Value (m 2 K/W) U-Value (W/m 2 K) Total U-Value (W/m 2 K) Total U-Value (BTU/hr ft 2 °F)

Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Vinyl House Siding Plywood Sheathing Exterior Walls

Component Heat Transfer Method MaterialThickness Thermal Conductivity (W/mK) R-Value (m 2 K/W) inchesmillimeters Between Studs At Studs Inside FilmConductionInside Film 0.12 WallboardConduction Gypsum Board Insulation Spray Applied ConductionGlass Fiber StudConductionSpruce PlywoodConductionPlywood SidingConductionFoil Backed Outside FilmConvectionOutside Film 0.03 Total Thickness (in) Total Thickness (m) R-Value (m 2 K/W) U-Value (W/m 2 K) Total U-Value (W/m 2 K) Total U-Value (BTU/hr ft 2 °F) Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Vinyl House Siding Plywood Sheathing

Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Polystyrene Insulation Vinyl House Siding Poured Concrete Plywood Sheathing Tar Paper Above Ground Basement Walls

Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Polystyrene Insulation Vinyl House Siding Poured Concrete Plywood Sheathing Tar Paper Above Ground Basement Wall Component Heat Transfer Method MaterialThickness Thermal Conductivity (W/mK) R-Value (m 2 K/W) inchesmillimeters Between Studs At Studs Inside FilmConductionInside Film 0.12 WallboardConduction Gypsum Board Insulation Spray Applied ConductionGlass Fiber StudConductionSpruce Exterior Wall Poured Concrete Conduction Sand and Gravel or stone aggregate Insulation Board and Slab ConductionPolystyrene PlywoodConductionPlywood SidingConductionFoil Backed Outside FilmConvectionOutside Film 0.03 Total Thickness (in) Total Thickness (m) R-Value (m 2 K/W) U-Value (W/m 2 K) Total U-Value (W/m 2 K) Total U-Value (BTU/hr ft 2 °F)

Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Polystyrene Insulation Poured Concrete Tar Paper Subterranean Walls

Subterranean Wall Component Heat Transfer Method MaterialThickness Thermal Conductivity (W/mK) R-Value (m 2 K/W) inchesmillimeters Between StudsAt Studs Inside FilmConductionInside Film 0.12 WallboardConductionGypsum Board Insulation Spray Applied ConductionGlass Fiber StudConductionSpruce Exterior Wall Poured Concrete Conduction Sand and Gravel or stone aggregate Insulation Board and Slab ConductionPolystyrene Outside FilmConvectionOutside Film 0.03 Total Thickness (in) Total Thickness (m) R-Value (m 2 K/W) U-Value (W/m 2 K) Total U-Value (W/m 2 K) Total U-Value (BTU/hr ft 2 °F) Gypsum Wallboard Spray Applied Glass Fiber 2” x 6” Stud Polystyrene Insulation Poured Concrete Tar Paper

Heat Transfer Analysis – No Space Heating Needed U Exterior A Exterior U roof A roof U base_below A base_below U base_above A base_above U window A window Ext A window_abv base U door A door_Ext A door_abv base UA TOTAL BTU/hr ft 2 °Fft 2 BTU/hr ft 2 °Fft 2 BTU/hr ft 2 °Fft 2 BTU/hr ft 2 °Fft 2 BTU/hr ft 2 °Fft 2 BTU/hr ft 2 °Fft 2 BTU/hr °F Area Ratio R-Value (hr ft 2 °F/BTU) Heat Transfer Analysis Heat Transfer for Average HighHeat Transfer for Average Low Heat Generation Heat Produced MonthAverage HighAverage Low Ambient Room Temperature Heat Transfer Heat Transfer In or Out of House? Heat Transfer Heat Transfer In or Out of House? Typical Electric Heater Heat Transfer ΔqΔq -°F BTU/hrWIn or Out?BTU/hrWIn or Out?BTU/hr January out of out of February out of out of March out of out of April into out of May into out of June into out of July into out of August into out of September into out of October into out of November into out of December out of out of

Year #Future Value Fuel CostPresent Worth of the Fuel Cost n(1+i) (n-1) (i=8.4%)1/(1+d) n (d=0.75%) TOTALNET PRESENT WORTH Economic Analysis – Net Present Worth