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Preliminary Design Review Solar Thermal Water Heating System

Preliminary Design Review Solar Thermal Water Heating System. Team #5 San Diego, California. Ashley Tyler Tyler Borden Michael Cheney Matthew Murray Heather Hussain Allison Schneider. Agenda. Introduction Floor Plan Layout House Elevation Drawings Foundation Analysis

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Preliminary Design Review Solar Thermal Water Heating System

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  1. Preliminary Design ReviewSolar Thermal Water Heating System Team #5 San Diego, California Ashley Tyler Tyler Borden Michael Cheney Matthew Murray Heather Hussain Allison Schneider

  2. Agenda • Introduction • Floor Plan Layout • House Elevation Drawings • Foundation Analysis • Roof Truss Analysis • Hydronic Subsystem Analysis • Heat Transfer Analysis • Building Thermal System Analysis • Flat Plat Collector Analysis • F-Chart Analysis

  3. Floor Plan Layout • Objectives • Support the FPC solar thermal heating system • Include the required living spaces.

  4. Floor Plan Layout • 26’ x 44’

  5. Floor Plan Layout • 9 foot ceilings • 26’ x 44’

  6. Foundation Analysis • Main concerns • Secure for house structure including in times of natural disaster – Seismic zone 4 • Basement has both livable and storage qualities • Foundation protects from the intrusion of environment, pests and soil • Plastic wrap around total foundation • Retains heat • Styrofoam insulation

  7. Foundation Analysis • Other concerns • Load bearing wall about 15’ from East or West wall to line up with other structures. • Footings • Should have a width of 15” and a thickness of 6” • At least 12” below surface

  8. Foundation Analysis • Solution #1- Masonry Foundation • Cinderblock build • 8 in blocks • ≈ $2100 for blocks to create a maximum of a 8’8” ceiling • Rebar reinforcements (#4 to #5) every 48” with extra around openings

  9. Foundation Analysis • Solution #2- Masonry Foundation • Cinderblock build • 10 in blocks • ≈ $2700 for blocks to create a maximum of a 8’8” ceiling • Rebar reinforcements (#4 to #5) every 56” with extra around openings

  10. Foundation Analysis • Solution #3- Poured Foundation • ≈ $10000 for enough concrete to pour to a maximum of 9’ ceilings • Rebar reinforcements (#5 to #6) approximately every 48” on north side with extra around openings

  11. Roof Structure • Objectives • Support the weight of the roof and FPCs • Total weight of roof ~ 6 tons (7lbs/ft2) • Total weight of FPCs ~ 600lbs • Protect the house from the environment

  12. Roof Truss Analysis • 3-Tab Shingles • Light weight • 20-30 yrs • Architectural Shingles* • Heavy duty • 30-50 yrs • * Used for preliminary analysis

  13. Hydronic Subsystem Analysis • 28 gpm for 7 FPCs. • Preliminary piping layout: • Pump and heat exchanger located in the basement. • ASTM B88 2.5” Type L Copper Pipe • Head ~ 275ft

  14. Building Thermal System Analysis Objective • Prevent heat transfer through the exterior walls of the home by decreasing the overall heat transfer coefficient, U-Value • Maximize the R-Values by varying the materials and thicknesses of wall components

  15. Building Thermal System Analysis • Design Constraints • Siding of the house is Vinyl • Roofing of the house is Asphalt • Assumptions • Took average thermal conductivity when density varied within a material • Convert metric units to SI units at termination of calculations • 16” studs on Center • Sources of heat loss are not accounted for in the analysis • Ceiling thermal analysis is independent of structural side • Analyze interior to exterior heat transfer only

  16. Building Thermal System Analysis Exterior Walls

  17. Building Thermal System Analysis Exterior Walls Loose Fill (previous) Blanket and Batt

  18. Building Thermal System Analysis Exterior Walls Loose Fill Blanket and Batt Spray Applied

  19. Loose Fill Building Thermal System Analysis Exterior Walls Blanket and Batt Spray Applied Board and Slab

  20. Building Thermal System Analysis Ceiling Walls

  21. Building Thermal System Analysis Basement Walls • Foundations Engineer Provided two wall designs • Cinderblocks • Poured Concert – higher resistance to heat transfer

  22. Building Thermal System Analysis Basement Walls

  23. Building Thermal System Analysis Calculation of UA Value

  24. Solar Thermal System Analysis Flat Plate Collector • Average ambient temperature -70.5 degrees Fahrenheit • Daily water usage - 80 gallons • Tank temperature - 120 degrees Fahrenheit • Slope of panel - 32 degrees • 1 Glazing coat - Low Iron Tempered Glass • Test fluid -Water • Absorber material - Copper • Fuel type - Electric

  25. Solar Thermal System Analysis Domestic Hot Water System Only EP-40 EC-32

  26. Solar Thermal System Analysis Domestic Hot Water System Only EC-24 • Best overall - EC-32 with 3 panels • Highest Life Cycle Savings • Approx $5,000 • Total Solar fraction • .983 • Total weight • 343 lbs • Total cost of panels • $2609.91

  27. Solar Thermal System Analysis Heating & Water System EP-40 EC-32

  28. Solar Thermal System Analysis Heating & Water System EC-24 • Best overall – EC-32 with 6 panels • Highest Life Cycle Savings • Approx $7,500 • Total Solar Fraction • .966 • Total weight • 686 lbs • Total cost of panels • $5,219.82

  29. Questions?

  30. References • http://www.energysavers.gov/your_home/insulation_airsealing/index.cfm?mytopic=11510 • http://www.pima.org/ContentPage/wall-insulation.aspx • http://rvalue.net/ • Fundamentals of Heat Transfer Textbook • 2009 Ashrae Handbook - Database

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