ecostud energy savings analysis this report is the property of superior polymer products, any...
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EcoStud Energy Savings AnalysisEcoStud Energy Savings Analysis
This report is the property of Superior Polymer Products,This report is the property of Superior Polymer Products,any unauthorized use or reproduction is prohibited.any unauthorized use or reproduction is prohibited.
Bobbi S. WoodBobbi S. Wood
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This report is the property of Superior Polymer Products, unauthorized use or
reproduction is prohibited.
GoalGoal
Calculate the cost savings of using Calculate the cost savings of using EcoStuds in place of Steel studs in a EcoStuds in place of Steel studs in a building. building.
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This report is the property of Superior Polymer Products, unauthorized use or
reproduction is prohibited.
RadTherm Model SetupRadTherm Model Setup
Polystyrene Foam Board (1.5 inch) Gypsum Board
(0.5 inch)
Concrete
Wall Top View
Stud25 gauge Steel
Versus0.09inch EcoStud
(16 inches on center)
Average Outside Air = 32oF (0oC)
Inside Air = 68oF (20oC)
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This report is the property of Superior Polymer Products, unauthorized use or
reproduction is prohibited.
Calculate R-ValuesCalculate R-Values
A steady state thermal model of a wall A steady state thermal model of a wall section was used to calculate the R-valuesection was used to calculate the R-value
R-ValueR-Value
Steel Z FurSteel Z Fur 7.87.8
EcoStudEcoStud 9.49.4
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This report is the property of Superior Polymer Products, unauthorized use or
reproduction is prohibited.
RadTherm Model OutputRadTherm Model Output
Cost to maintain constant Room Air Temperature of Cost to maintain constant Room Air Temperature of 2020ooC for Average Winter Day per 100sqft C for Average Winter Day per 100sqft
Steel StudsSteel Studs $2.57$2.57
EcoStudEcoStud $2.47$2.47
Savings/DaySavings/Day $0.10$0.10
Calculations based on Electric Heat [$0.076/KW-hr or $259.3/BTU]
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This report is the property of Superior Polymer Products, unauthorized use or
reproduction is prohibited.
Thermal ModelsThermal Models
10ft
10ft10ft
20ft 20ft
10ft
40ft40ft
10ft
100sqft
400sqft
1600sqft
Inside Air Set to 68oF [20oC]
Model 1
Model 2
Model 3
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This report is the property of Superior Polymer Products, unauthorized use or
reproduction is prohibited.
Model Set Up and Boundary Model Set Up and Boundary ConditionsConditions
Each model was run twiceEach model was run twice1.1. R-value for Steel studs applied to wallR-value for Steel studs applied to wall
2.2. R-value for EcoStuds applied to wallR-value for EcoStuds applied to wall
Boundary ConditionsBoundary Conditions Winter day – Average Air Temp 32Winter day – Average Air Temp 32ooF [0F [0ooC] C] Internal Air temperature fixed at 68Internal Air temperature fixed at 68ooF [20F [20ooC]C] 24 hour diurnal (Weather File)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 roomRoof and Floor were assigned temperature parts and were not connected by conduction to the walls or the air inside the room
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reproduction is prohibited.
Outside Air TemperatureOutside Air Temperature
Ambient Air
25
27
29
31
33
35
37
39
0:51
:00
2:21
:00
3:51
:00
5:21
:00
6:51
:00
8:21
:00
9:51
:00
11:2
1:00
12:5
1:00
14:2
1:00
15:5
1:00
17:2
1:00
18:5
1:00
20:2
1:00
21:5
1:00
23:2
1:00
Time of Day
Tem
per
atu
re [
C]
Ambient Air
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reproduction is prohibited.
Average Winter DayElectric Heat (0.076/KW-hr)
$0.00
$0.20
$0.40
$0.60
$0.80
$1.00
$1.20
200 400 600 800 1000 1200 1400 1600 1800
Wall Area (ft2)
Co
st
Sa
vin
gs
($
)
Cost Savings for each ModelCost Savings for each Model
1
2
3
This plot shows that the cost savings is linearly proportional to wall surface area
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reproduction is prohibited.
ROIROI
FuelFuel Nat GasNat Gas $0.63 $0.63 531.9 531.9 3.0 3.0 PropanePropane $1.56 $1.56 215.3 215.3 1.2 1.2 Fuel OilFuel Oil $1.51 $1.51 223.1 223.1 1.3 1.3 ElectricElectric $4.42 $4.42 76.0 76.0 .4 .4
10,000 ft10,000 ft22 building 10’ high, 400’ outside wall building 10’ high, 400’ outside wall Additional consumer cost for EcoStud is $336.00Additional consumer cost for EcoStud is $336.00 Nat Gas .0067/ft3 – Propane $1.49/gal – Fuel Oil $1.40/gal – Electric $0.16/kwhNat Gas .0067/ft3 – Propane $1.49/gal – Fuel Oil $1.40/gal – Electric $0.16/kwh
Savings per DaySavings per Day Days to ROI Years to ROI Days to ROI Years to ROI