Preliminary Design Presentation Group 5 Arlington, VA Kyle Desrosiers, Foundations Engineer Mohamed Mandeel, Structural Engineer Matthew Switzer, Fluid System Engineer Peter Bowlin, Building Thermal Systems Engineer Evan See, Solar Thermal Systems Engineer

Agenda 1.Foundations Analysis 2.Roof Truss Analysis 3.Fluid System Analysis 4.Building Thermal Analysis 5.Solar Thermal Analysis 6.Conclusion/Questions

Foundations Analysis Kyle Desrosiers

Foundation Design Type: Full basement, conditioned Material: Concrete with steel reinforcements (if necessary), still evaluating Dimensions: 50ft wide x 26ft long Rectangle Max depth (relative to ground surface)= 7 ft –(at front of house) Wall thickness= 10 in.

Foundation Design Footing: –Width= 16 inches –Location= 1 foot below frost line –Frost line= 10 inches Radon Mitigation –Action Level: 4 pCi/L –Avg radon level for Arlington County=3.4 pCi/L –Methods: Spray, Air ventilation system, soil depressurization

Foundations- Sources Poured_Concrete_Foundation_Walls.shtml A013/0/Arlington.pdf _nc_st_b2v02_18_sec005_par042.htm

Roof Truss Analysis Mohamed Mandeel

Truss Design Truss Type: Room-in-attic truss Beam Size: 2”x6” or 2”x4”, still calculating Number needed: 26 trusses total for 50' of length, spacing of 2' between trusses. Pro/E model Calculations are done using Ansys

Basic Room-in-Attic Truss Designed

Fluids System Analysis Matthew Switzer

Basic Storage & Pump Needs Water Storage Needs Approx. 1 gal per 1ft 2 FPC Estimated FPC area ft 2 Pump TBD by FPC needs Most likely a centrifugal pump Flow rate Feet of head required

Copper vs PVC Copper Long term durability Increased resale value Less bulky Corrosion Long Warranties Costly ~ echbriefs/cpvccopper.htm PVC Approved for almost all building codes Resists corrosion/abrasion Cost effective Easy installation 100 psi 180 o F Self-insulating Diameter limitations (1.5”-2” max) “Plastic” water taste Easily Damaged

Exchanger Types Flow Types Cross Flow Counter Flow –Most Efficient Parallel Flow Multi-pass Exchangers –Combination of flows Shell and Tube Exchangers Separate “circuits” of water flow Number of passes Size depends on economics and maintenance needs High pressure & high temperature

Building Thermal Analysis Peter Bowlin

Month Average Temperature (F) Average Precipitation (in) January February March April May June July August September October November December This is data typical of a moderate to colder climate, so the required R-values of the insulation used will be fairly high.

DOE/CE-0180 January 2008 Department of Energy Assistant Secretary Energy Efficiency and Renewable Energy Insulation LocationR-Value Attic49 Floor25 Wall Sheathing5 Wall Cavity15 Concrete or Masonry Wall15.6 Crawl Space Wall25 Basement Wall Exterior10 Basement Wall Interior11

InsulationFiberglassMineral WoolPlastic FiberPolyurethane FoamCementitious Foam Vacuum Insulated Panel Cellulose WindowsSingle Glass Double Glazed (1/4”) Double Glazed (3/4”) Double Glazed (2 Suspended Films) Low- E (2 Suspended Films X Doors Wood Hollow Core Flush Wood Solid Core Flush Wood Storm (50% Glass) Metal Storm Metal Insulated Storm XX SidingBrickCement Fiber Wood Clapboard ShingleStuccoStoneX

Solar Thermal Analysis Evan See

Possible Supplier Sun Source Energy Products, Inc. PO Box 31 Netcong, NJ Why? –Local to DC –Competitive Prices –Works with several dealers Source: “Logo”. Solar Energy Parts Catalog. 2009, 10/19/09

SunEarth Inc. Collectors - Price EC - Series More expensive Copper absorber with black chrome surface 10 Year Warranty EP - Series Less expensive Copper absorber with selective paint surface 10 Year Warranty Sun Source Energy Products. Solar Energy Parts Catalog October 2009.

SunEarth Inc. Collectors - Price EC - Series 24 sq ft –$ sq ft –$1, sq ft –$1, EP - Series 24 sq ft –$ sq ft –$ sq ft –$1, Sun Source Energy Products. Solar Energy Parts Catalog October 2009.

Roof Angle Optimum Roof Angle of 35.5 degrees Optimum Azimuth at 0 degrees (South) Source: FCHART Software Package. 2008

Collector Size Life Cycle savings improves with larger collectors 40 sq ft Collector is recommended Source: FCHART Software Package. 2008

Number of Collectors Peak Value for Life Cycle Savings is 10 Fewer is recommended to save on initial costs and potentially greater savings Source: FCHART Software Package. 2008

Economics Overview Potential for Savings of at least $1000 Can provide all needed DHW and Heat during summer months Economics Summary First Year Fuel Cost $378 First Year Fuel Savings $239 Initial Investment $7400 Life Cycle Savings $1324 Life Cycle Costs Fuel $13867 Equipment $7454 Total $21321 SolarHeatDhwAuxf [10^6 Btu][10^6 Btu][10^6 Btu][10^6 Btu][ ] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Source: FCHART Software Package. 2008

Questions? Thank You