Two story home powered by solar energy Location: Tulsa, Oklahoma Team members: Andrew Blair, Karen Smith, Phil Eaton, Scott Melchionno, Tim Williams Preliminary Design Review

Floor Plan Layout R· I· T Mechanical Engineering Department S

Floor Plan Layout R· I· T Mechanical Engineering Department S

Floor Plan Layout R· I· T Mechanical Engineering Department S

House Elevation Drawing R· I· T Mechanical Engineering Department S

Foundation Analysis R· I· T Mechanical Engineering Department o Functions of Foundation o Support Load of House o Resist Load of Soil o Resist Moisture Intrusion o Cost Efficient o Material Cost o Labor Cost o Resist Change in Temperature o Built to Building Code

Foundation Analysis R· I· T Mechanical Engineering Department o Material Choices o Poured Cement o Better Insulation o More Water Resistant o Cement Blocks o Cheaper cost (material/labor) o Same Strength (filled) o Rebar Reinforcement o.0127 meter bar o Placed every.6096 meters Standard Handbook for Mechanical Engineers

Foundation Analysis R· I· T Mechanical Engineering Department o Analysis o Thickness:.2921 m o Rebar:.0127 m spaced every.6096 m o Force due to soil: kN o Stress due to House: 4.26 MPa o Compressive Strength (Portland concrete): 27.6 MPa o Shear Strength (Portland concrete): 5.52 MPa o Bending Stress: 5.20 MPa o Factors of Safety: Compression 6.5 Bending 5.1 o Footers: Depth.4572m Width.4572m Thick.2032m

Truss Analysis R· I· T Mechanical Engineering Department o Functions of Roof Truss o Support Roofing Materials o Support Flat Plate Collector o Resist Wind and Snow Loads o Cost Efficient o Material Cost o Labor Cost o Tornado Resistant o Factor of Safety o Built to Building Code

Truss Analysis R· I· T Mechanical Engineering Department o Analysis o Typical residential roof design kN/m 2 o ASCE 7-02 Snow Load Standard o Snow Load=1.62 kN/m 2 o Flat Plate Collector o 1.70 kN/m 2 o Total Roof Load kN/m 2 o Each truss supports ~ 21.8 kN

Truss Analysis R· I· T Mechanical Engineering Department o Option Analysis o Fink Truss o Most efficient use of material for truss o Howe Truss o More material used, but lower member forces o Truss Spacing o 1.75m (48”) Standard o Roof Angle o 30 ° – Less efficient, but standard- can buy manufactured trusses- cheaper. o 37 ° – ~10% more efficient, but built on site.- expensive o Material o Douglas Fir- Strong, expensive o Hemlock- Weaker, but less expensive

Truss Analysis R· I· T Mechanical Engineering Department

Truss Analysis R· I· T Mechanical Engineering Department

Truss Analysis R· I· T Mechanical Engineering Department o Truss Summary o Fink Truss o Most efficient use of material for truss, sufficiently low member forces o 30 ° Roof Angle o Can buy cheaper pre-manufactured trusses o Easier Installation o Douglas Fir- Rough Cut o Higher strength to cost ratio o Benefit in “Tornado Alley” o Cost (Minus Labor costs) o Pre-manufactured- ~ $ ( Michiana Building) o Custom- ~ $ (Est. local cost- Lowes)

o Assumptions Made o Wall design o Siding choice o Insulation choices o Heat Loss Calculations o Cost Analysis Thermal Envelope R· I· T Mechanical Engineering Department

o Assumptions Made o Heat convection on the inside of the house is negligible to the rest of the thermal system o Cold roof o Studs are 15% and Insulation is 85% of wall o Turbulent flow for outside air o All windows are the same size Thermal Envelope R· I· T Mechanical Engineering Department

o Wall Design o Siding Choices o Brick o Vinyl o Wood Shingles o Insulation Choices o Glass Fiber Blanket o U value =.402 W/m 2 K o Loose Fill Glass Fiber o U value =.4275 W/m 2 K o Polystrene R-12 o U value =.3255 W/mK Thermal Envelope R· I· T Mechanical Engineering Department Not Drawn To Scale Gypsum Insulation Plywood Brick Stud

o Heat Loss Calculations o Glass Fiber Blanket o Q = W o Polystrene R-12 o Q = W o Loose Fill Glass Fiber o Q = W o Cost o Glass Fiber Blankets = $ o Polystrene R-12 = $ o Loose Fill Glass Fiber = $ Thermal Envelope R· I· T Mechanical Engineering Department

FPC Specs R· I· T Mechanical Engineering Department FPC Type - SunMaxx-M2 Cost - $ each Dry Weight - 85 lbs (38.5 kg) Absorber Area – 21.5 ft 2 – (~2 m 2 ) Nominal Flow Rate –.08 m 3 /hr (21 gph)

FPC System Design for Hot Water Use R· I· T Mechanical Engineering Department Tilt angle – 37 degrees (optimal sun exposure) F Chart Results – 2,017 kWh/yr/m2 Potential energy generation 3 panels would sufficiently supply hot water to residence at nearly 100% of time Hot water usage was converted to an energy consumption equivalent – 7,022 kWh/yr

FPC System Design for Hot Water and Radiant Heating R· I· T Mechanical Engineering Department Q Value of home becomes a factor Heat Loss estimates used to approximate how much energy radiant heating system must supply System must develop between 14, ,500 kWh/yr of additional energy to make up for lost heat based on insulation material c

System Viability R· I· T Mechanical Engineering Department The design of the house delivers Q values in the range of to watts. To generate the necessary energy to make up for this loss the system would require 8 panels. At a net cost of approximately $ installation, delivery, and hardware the complete system cost will be far below the $36,000 allowable for the system.

Flat Plate Pre-Packaged System: 50 Gallon R· I· T Mechanical Engineering Department

Hydronic System Schematic R· I· T Mechanical Engineering Department

Fluid Systems R· I· T Mechanical Engineering Department The entire system (FPCs included) is a COTS system produced by Silicon Solar, Inc. Because it is a COTS system, the separate components are specifically chosen by manufacturer to provide the highest efficiency and lowest cost. The entire system can be purchased for just under $3000, including freight and crating fee. Warranty: 3 year tank, 1 year pump and controller, 1 year on balance of system components, 3 year on flat plate. The system is designed to produce at least 80 gallons of potable hot water per day.

Fluid Systems R· I· T Mechanical Engineering Department The DHW system is controlled by a computer which automatically regulates the temperature of the water in the storage tank. If the temperature falls below a set minimum, the computer will switch on the pump to circulate the working fluid through the FPCs and heat exchanger to raise the temperature of the water in the storage tank.