Preliminary Design Presentation

Group 5Arlington, 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

• http://www.askthebuilder.com/N4_Thickness_of_Poured_Concrete_Foundation_Walls.shtml

• http://county-radon.info/VA/Arlington.html• http://soildatamart.nrcs.usda.gov/Manuscripts/

VA013/0/Arlington.pdf• http://publicecodes.citation.com/st/nc/st/b2v02/

st_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 1ft2 FPC

• Estimated FPC area• 300-400 ft2

• 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

~http://www.builderswebsource.com/techbriefs/cpvccopper.htm

• PVC• Approved for almost all

building codes• Resists

corrosion/abrasion• Cost effective• Easy installation• 100 psi rated @ 180oF• 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

MonthAverage

Temperature (F)

Average Precipitation

(in)

January 36.5 3.48

February 39 3.07

March 48 4.12

April 58 3.06

May 67.5 4.18

June 77 3.28

July 82 3.96

August 79.5 4.05

September 72.5 4.06

October 61 3.19

November 50.5 3.45

December 41 3.69

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-0180January 2008

            

Department of EnergyAssistant SecretaryEnergy Efficiency and Renewable Energy

Insulation Location R-Value

Attic 49

Floor 25

Wall Sheathing 5

Wall Cavity 15

Concrete or Masonry Wall 15.6

Crawl Space Wall 25

Basement Wall Exterior 10

Basement Wall Interior 11

Insulation Fiberglass Mineral Wool Plastic Fiber Polyurethane Foam Cementitious FoamVacuum

Insulated PanelCellulose

Windows Single GlassDouble

Glazed (1/4”)Double Glazed

(3/4”)Double Glazed (2 Suspended Films)

Low- ELow-E

(2 Suspended Films

X

DoorsWood Hollow

Core FlushWood Solid Core Flush

Wood Storm (50% Glass)

Metal StormMetal Insulated

StormX X

Siding Brick Cement Fiber Wood Clapboard Shingle Stucco Stone X

Solar Thermal Analysis

Evan See

Possible SupplierSun Source Energy Products, Inc.

PO Box 31

Netcong, NJ 07857

• Why?– Local to DC– Competitive Prices– Works with several

dealers

Source: “Logo”. Solar Energy Parts Catalog. 2009, 10/19/09 <http://www.sunsourceproducts.com/catalog/cataloglist.asp?header=mfg&filter=SunEarth%20Inc.&mfg=SE>

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. 2009. 16 October 2009 <http://www.sunsourceproducts.com/catalog/cataloglist.asp?header=mfg&filter=SunEarth%20Inc.&mfg=SE>.

SunEarth Inc. Collectors - Price

EC - Series

• 24 sq ft– $936.70

• 32 sq ft– $1,060.80

• 40 sq ft– $1,310.00

EP - Series

• 24 sq ft– $890.00

• 32 sq ft– $952.00

• 40 sq ft– $1,180.00

Sun Source Energy Products. Solar Energy Parts Catalog. 2009. 16 October 2009 <http://www.sunsourceproducts.com/catalog/cataloglist.asp?header=mfg&filter=SunEarth%20Inc.&mfg=SE>.

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 SummaryFirst Year Fuel Cost $ 378First Year Fuel Savings $ 239Initial Investment $ 7400Life Cycle Savings $ 1324Life Cycle CostsFuel $ 13867Equipment $ 7454Total $ 21321

Solar Heat Dhw Aux f [10^6 Btu] [10^6 Btu] [10^6 Btu] [10^6 Btu] [ ]

Jan 5.69 12.37 2.255 12.47 0.147Feb 7.20 10.51 2.049 9.43 0.249Mar 9.33 7.43 2.230 5.64 0.416Apr 10.03 4.15 2.072 2.24 0.640May 10.34 1.26 2.028 0.24 0.926Jun 10.45 0.22 1.867 0.00 1.000Jul 10.71 0.09 1.838 0.00 1.000Aug 10.06 0.19 1.820 0.00 1.000Sep 9.20 0.61 1.801 0.15 0.940Oct 8.39 4.65 1.950 3.30 0.500Nov 6.42 7.13 1.997 6.56 0.281Dec 6.06 12.07 2.160 11.86 0.167Year 103.87 60.66 24.068 51.89 0.388

Source: FCHART Software Package. 2008

Questions?

Thank You