1. Ray Casper - Foundations Engineer John Scanlon - Structural Engineer Jimmy Mounnarat - Fluid System Engineer Igor Babushkin - Solar Thermal Engineer Preliminary Design Review Austin Texas

2. PDR Agenda Introduction Floor plan layout House elevation drawings Foundation analysis Roof Truss analysis Hydronic subsystem analysis Heat Transfer analysis Building and Flat Plate Collector F-Chart analysis

3. Floor Plan Layout

4. House Elevation Drawings

5. Foundation Options Poured ConcreteCement Block Low labor cost Quicker Requires more material Prevents water intrusion Better heat retention Low material cost High Labor Cost Joints allow for water intrusion Weaker

6. Foundation Calculations 8’ Soil Depth 50’ x 30’ foundation 15 degree slope M Max on 50’ North wall Soil Density 100lb/ft 3 House load = 200lb/ft 2 8 inch thick poured FOS COMPRESSION = 87.2 FOS BENDING = 2.2

7. Roof Truss Analysis A “Double Howe” truss using 2X8 beams proved to be suitable for our application. Roof pitch is variable depending upon FPC placement.

8. Hydronic Subsystem Analysis Schematic Head Loss, Pump size, Performance Curves Copper vs CPVC Cost Comparison

9. Hydronic Schematic http://www.backwoodshome.com/articles/hackleman65.html

10. Head Loss Max Head Loss per system 51.4 ft. Assuming 3 FPC’s. Pump Size 2 pump options in series. Taco pump – 2 x $219.75 Grundfos pump – 2 x $269.75

11. Taco Cast Iron Model 009-F5

12. Grundfos UP26-96F

13. Cost Analysis Copper vs CPVC ~ 33% Copper – corrodes, promotes corrosion, expensive. CPVC – higher reistance to heated water, no soldering, no corrosion, cheaper. Pumps ~ 19%

14. Heat Transfer Analysis

15. Solar Thermal  Compare Two FPC’s  Determine Number of Panels  Determine Angle

16. Alternative Energy– AE-26 Roof angle is Best at around 31 degrees Best area is around 54 ft 2

17. Economics of the AE-26 Chose 6 Panels because of the Thermal Output Data Panel : $825.00 Price per ft 2 : $34.88 Area: 25.35 ft 2

18. Sun Earth, Inc -- EP-21 Very strange slop calculation, 28 degrees is best slope Collector Panel area seems to be the best at 41.11 ft 2

19. Economics of the EP-21 Similarly to the previous choice, 6 panels are chosen Panel: 609.97 Price per ft 2 : $34.88 Area: 21.35 ft 2

20. Questions?