Thermal Building Design Wall Design and Heat Transfer Analysis.

Thermal Building DesignWall Design and Heat Transfer Analysis

Gypsum Wallboard

Spray Applied Glass Fiber

2” x 6” Stud

PolystyreneInsulation

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 Material Thickness

Thermal Conductivity

(W/mK)

R-Value (m2K/W)

inches millimeters Between Studs At Studs

Inside Film Conduction Inside Film 0.12 0.12

Wallboard Conduction Gypsum Board 0.625 15.875 0.16 0.09921875 0.09921875

InsulationSpray Applied Conduction Glass Fiber 3.5 88.9

0.038

2.30948043 -

0.039

InsulationBoard and

SlabConduction Polystyrene 2 50.8 11.2 -

Stud Conduction Spruce 5.5 139.7 0.09 - 1.55222222

Plywood Conduction Plywood 0.625 15.875 0.15 0.15

Roofing Conduction Asphalt 0.035 0.889 0.078 0.078

Outside Film Convection Outside Film 0.03 0.03

Total Thickness (in)

Total Thickness (m) R-Value

(m2K/W)R-Value (m2K/W)

6.785 172.339 13.9866992 2.02944097

U-Value (W/m2K)

U-Value (W/m2K)

0.0714965 0.49274653

Total U-Value (W/m2K)

Total U-Value (BTU/hr ft2 °F)

0.1136215 0.02000993

Gypsum Wallboard


2” x 6” Stud

Vinyl House Siding

Plywood Sheathing

Exterior Walls

Exterior Walls



(W/mK)

R-Value (m2K/W)





0.038

3.62918354 -

0.039



Siding Conduction Foil Backed 0.035 0.889 0.52 0.52





6.785 172.339 4.54840229 2.47144097

U-Value (W/m2K)

U-Value (W/m2K)

0.21985742 0.40462225



0.24757215 0.04360003

Gypsum Wallboard

Spray Applied Glass

Fiber

2” x 6” Stud

Vinyl House Siding

Plywood Sheathing

Gypsum Wallboard


2” x 6” Stud


Vinyl House Siding

Poured Concrete

Plywood Sheathing

Tar Paper

Above Ground Basement Walls

Gypsum Wallboard

Spray Applied

Glass Fiber

2” x 6” Stud


Vinyl House Siding

Poured Concrete

Plywood Sheathing

Tar Paper

Above Ground Basement Wall



(W/mK)

R-Value (m2K/W)





0.038

3.62918354 -

0.039


Exterior WallPoured

ConcreteConduction

Sand and Gravel or

stone aggregate

8 203.2 2.15 -

InsulationBoard and



Siding Conduction Foil Backed 0.035 0.889 0.52 0.52





16.785 426.339 17.8984023 2.47144097

U-Value (W/m2K)

U-Value (W/m2K)

0.05587091 0.40462225



0.10818361 0.01905226

Gypsum Wallboard


2” x 6” Stud


Poured Concrete

Tar Paper

Subterranean Walls

Subterranean Wall



(W/mK)

R-Value (m2K/W)





0.038

3.62918354 -

0.039


Exterior WallPoured

ConcreteConduction

Sand and Gravel or

stone aggregate

8 203.2 2.15 -

InsulationBoard and






16.125 409.575 17.2284023 1.80144097

U-Value (W/m2K)

U-Value (W/m2K)

0.05804369 0.55511117



0.13260381 0.02335291

Gypsum Wallboard

Spray Applied

Glass Fiber

2” x 6” Stud


Poured Concrete

Tar Paper

Heat Transfer Analysis – No Space Heating NeededUExterior AExterior Uroof Aroof Ubase_below Abase_below Ubase_above Abase_above Uwindow Awindow Ext Awindow_abv base Udoor Adoor_Ext Adoor_abv base UATOTAL

BTU/hr ft2 °F ft2 BTU/hr ft2 °F ft2 BTU/hr ft2 °F ft2 BTU/hr ft2 °F ft2 BTU/hr ft2 °F ft2 ft2 BTU/hr ft2 °F ft2 ft2 BTU/hr °F

0.0436 2660 0.02001 1600 0.0233529 540 0.019052 730 0.24 216 24 0.3 20 38.921875238.2988

Area Ratio 0.911278 0.913806 0.081203 0.032876712 0.007519 0.05331764

R-Value (hr ft2

°F/BTU)22.93576 49.97519 42.821216 52.48721 4.166667 3.333333

Heat Transfer Analysis

Heat Transfer for Average High Heat Transfer for Average Low Heat Generation

Heat Produced

Month Average High Average LowAmbient

Room Temperature

Heat TransferHeat Transfer

In or Out of House?

Heat Transfer Heat Transfer In or Out of House?

Typical Electric

Heater Heat Transfer

Δq

- °F °F °F BTU/hr W In or Out? BTU/hr W In or Out? BTU/hr BTU/hr

January 65 48 68 714.89652 209.5155 out of 4765.977 1396.77 out of 5200 434.0232

February 66 50 68 476.59768 139.677 out of 4289.379 1257.093 out of 5200 910.6209

March 66 52 68 476.59768 139.677 out of 3812.781 1117.416 out of 5200 1387.219

April 68 55 68 0 0 into 3097.885 907.9005 out of 5200 2102.115

May 69 58 68 -238.2988 -69.8385 into 2382.988 698.385 out of 5200 2817.012

June 71 61 68 -714.8965 -209.5155 into 1668.092 488.8695 out of 5200 3531.908

July 76 65 68 -1906.391 -558.708 into 714.8965 209.5155 out of 5200 4485.103

August 78 67 68 -2382.988 -698.385 into 238.2988 69.8385 out of 5200 4961.701

September 77 65 68 -2144.69 -628.5465 into 714.8965 209.5155 out of 5200 4485.103

October 75 60 68 -1668.092 -488.8695 into 1906.391 558.708 out of 5200 3293.609

November 70 54 68 -476.5977 -139.677 into 3336.184 977.7389 out of 5200 1863.816

December 66 49 68 476.59768 139.677 out of 4527.678 1326.931 out of 5200 672.322

Year # Future Value Fuel Cost Present Worth of the Fuel Cost

n (1+i)(n-1) (i=8.4%) 1/(1+d)n (d=0.75%)

1 30 29.77667494

2 32.52 32.03763338

3 35.25168 34.47026758

4 38.21282112 37.08761296

5 41.42269809 39.90369474

6 44.90220473 42.93360307

7 48.67398993 46.19357393

8 52.76260509 49.70107606

9 57.19466391 53.47490467

10 61.99901568 57.53528205

11 67.206933 61.90396599

12 72.85231537 66.60436639

13 78.97190986 71.66167064

14 85.60555029 77.10297863

15 92.79641652 82.95744797

16 100.5913155 89.25645023

17 109.040986 96.033739

18 118.2004288 103.3256308

19 128.1292649 111.1711998

20 138.8921231 119.612487

TOTAL NET PRESENT WORTH 1302.74426

Economic Analysis – Net Present Worth

Thermal Building Design Wall Design and Heat Transfer Analysis.

Documents

Transcript of Thermal Building Design Wall Design and Heat Transfer Analysis.