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Bobbi S. Wood

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  1. EcoStud Energy Savings AnalysisThis report is the property of Superior Polymer Products,any unauthorized use or reproduction is prohibited. Bobbi S. Wood

  2. Goal • Calculate the cost savings of using EcoStuds in place of Steel studs in a building. This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  3. RadTherm Model Setup Wall Top View Average Outside Air = 32oF (0oC) Concrete Polystyrene Foam Board (1.5 inch) Stud 25 gauge Steel Versus 0.09inch EcoStud (16 inches on center) Gypsum Board (0.5 inch) Inside Air = 68oF (20oC) This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  4. Calculate R-Values • A steady state thermal model of a wall section was used to calculate the R-value This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  5. RadTherm Model Output • Cost to maintain constant Room Air Temperature of 20oC for Average Winter Day per 100sqft Calculations based on Electric Heat [$0.076/KW-hr or $259.3/BTU] This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  6. Thermal Models Model 2 Inside Air Set to 68oF [20oC] 10ft Model 3 20ft 20ft 400sqft Model 1 10ft 10ft 40ft 10ft 10ft 40ft 100sqft 1600sqft This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  7. Model Set Up and Boundary Conditions • Each model was run twice • R-value for Steel studs applied to wall • R-value for EcoStuds applied to wall • Boundary Conditions • Winter day – Average Air Temp 32oF [0oC] • Internal Air temperature fixed at 68oF [20oC] • 24 hour diurnal (Weather File) • Roof and Floor were assigned temperature parts and were not connected by conduction to the walls or the air inside the room This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  8. Outside Air Temperature This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  9. Cost Savings for each Model 3 2 1 This plot shows that the cost savings is linearly proportional to wall surface area This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.

  10. 10,000 ft2 building 10’ high, 400’ outside wall Additional consumer cost for EcoStud is $336.00 Nat Gas .0067/ft3 – Propane $1.49/gal – Fuel Oil $1.40/gal – Electric $0.16/kwh ROI • Fuel • Nat Gas $0.63 531.9 3.0 • Propane $1.56 215.3 1.2 • Fuel Oil $1.51 223.1 1.3 • Electric $4.42 76.0 .4 Savings per Day Days to ROI Years to ROI This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited.