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

2

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.

3

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)

4

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

5

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]

6

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

7

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

8

This report is the property of Superior Polymer Products, unauthorized use or

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

9

This report is the property of Superior Polymer Products, unauthorized use or

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

10

This report is the property of Superior Polymer Products, unauthorized use or

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