1. Britt Kern Mechanical Option Advisor: Dr. Treado Hunter’s Point South School Queens, New York

2. Britt Kern Mechanical Option  Introduction i.Building Summary ii.Site Plan iii.Existing Mechanical  Proposed Redesign  Mechanical Depth  Breadth – Electrical  Conclusion Size:153,769 sf Occupancy:IM/HS Schoolhouse Levels:5 Stories/No Cellar/Penthouse Cost:$61,098,000 Construction Dates :Jan 10, 2011 to Oct 7, 2013 Project Team Architect:FXFOWLE Architects StructuralYsreal A. Seinuk MEP: Kallen & Lemelson CM:Skanska Hunter’s Point South School

3. Britt Kern Mechanical Option  Introduction i.Building Summary ii.Site Plan iii.Existing Mechanical  Proposed Redesign  Mechanical Depth  Breadth – Electrical  Conclusion Hunter’s Point South School N Part of the Hunter’s Point South Project  Redevelopment of Waterfront  Vibrant  Sustainable  Middle-Income  Urban Community

4. Britt Kern Mechanical Option  Introduction i.Building Summary ii.Site Plan iii.Existing Mechanical  Proposed Redesign  Mechanical Depth  Breadth – Electrical  Conclusion AHU’s 1, 2, and 3 = VAV AHU’s 4, 5, and 6 = CAV 4 Condensing Boilers Fin Tube Radiators (2) 276 ton chillers Problems? Minimum Ventilation No Energy Recovery AHU 2 AHU 1 AHU 3 AHU 4 AHU 6 AHU 5 Mechanical Penthouse ACH-1 ACH-2 Hunter’s Point South School

5. Britt Kern Mechanical Option  Introduction  Proposed Redesign i.Objectives  Mechanical Depth  Breadth – Electrical  Conclusion Goals Ventilation Always Met Increase Sustainability Better Room Comfort Control Airside Replace AHU’s 1-3 with DOAS Total Energy Recovery Wheel Fan-Powered Induction Units (FPIU’s) Breadths Photovoltaic Solar Panel Array Structural Roof Analysis Hunter’s Point South School Waterside New Chillers Secondary Chilled Water Loop

6. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Ventilation Air Based On:  NYC Mechanical Code  30% Above ASHRAE Std. 62.1  Latent Load Reduction in 18% OA and 55% SA Exhaust Rates and ESP of Fans Hunter’s Point South School OA SA

7. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion 2 DOAS Specified by Manufacturer Total Energy Recovery Wheels All Preheating of OA Summer Design Winter Design Hunter’s Point South School 72°F, 30% RH 12.8°F, -5.4 DP

8. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Find CHW Supply Temp Size Coils for Heating and Cooling Optional MERV 8 filter – 1 LEED Point Supply CHW 58°F 75°F, 55% RH Hunter’s Point South School

9. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Current CHW Loop Re-Used: a.(2) 225 ton chillers b.LWT 44°F Higher CHW Temp for FPIU’s Secondary CHW Loop Created  33.5 ton chiller  LWT 58°F Current Chilled Water Loop Hunter’s Point South School Secondary Chilled Water Loop

10. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion ρ = constant Hunter’s Point South School

11. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Compare Old and New Systems Validate New System 3 Models:  VAV 100% Flow  VAV 30% Flow  FPIU Criteria:  No Drafts (<40 fpm)  Uniform Temperature (Setpoint 72°F)  Minimal Temperature Stratification Supply Diffuser Exhaust Outlet Hunter’s Point South School Student

12. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Results:  VAV 100% Flow -Some Drafts -High Room Temp  VAV 30% Flow -Lots of Drafts -High Room Temp 22 fpm 55 fpm 72°F 76°F 53 fpm 12 fpm 42 fpm 77°F 74.5°F Hunter’s Point South School

13. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Results:  FPIU No Drafts Steady Room Temp (72-73°F) Conclusions:  VAV is Problematic  FPIU = Good Air Distribution/Thermal Comfort 22 fpm 60 fpm 73°F72°F Hunter’s Point South School

14. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Reduction in:  Electricity = 7% (5% due to solar)  Natural Gas = 41%  Emissions = 16% CO 2e Electricity Usage by Month Natural Gas Usage by Month Hunter’s Point South School

15. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth i.DOAS/Wheel ii.FPIU iii.Chillers/Loops iv.CFD (MAE) v.Results  Breadth – Electrical  Conclusion Costs New Rooftop Units  Savings = $622,174 Costs Associated with FPIU’s  Savings = $651,137 Initial Cost Savings = $1,273,311 Enough Savings to Finance Solar Array Hunter’s Point South School

16. Britt Kern Hunter’s Point South SchoolMechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical i.Roof Layout ii.Schematic iii.Payback Analysis  Conclusion Inverter Combiner Boxes 68.99 kW

17. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical i.Roof Layout ii.Schematic iii.Payback Analysis  Conclusion Inverter Combiner Boxes < 9’ setback Hunter’s Point South School

18. Britt Kern Mechanical OptionHunter’s Point South School 100 feet away Difference in Height = 153 ft - 73 ft = 80 ft SohCahToa: Tan(x degrees) = 80 / 100 x = 38.7 degrees From 8:25 am on no shading. 100 ft 80 ft Angle  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical i.Roof Layout ii.Schematic iii.Payback Analysis  Conclusion N Summer Solstice

19. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical i.Roof Layout ii.Schematic iii.Payback Analysis  Conclusion Combiner Box DC Disconnect Inverter (75 kW) AC Disconnect Switchboard 2 GFI Fuse Combiner Box X 10 strings X 8 strings Hunter’s Point South School

20. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical i.Roof Layout ii.Schematic iii.Payback Analysis  Conclusion Initial Costs $296,666  After Incentives = $60,075 $14,987 Savings/year 188% Life Cycle Payback  Profit = $260,745 Hunter’s Point South School

21. Structural: Girders/Non-Composite Deck 25 Year LCC Analysis Performed NPV Savings = $2,018,185 Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical  Conclusion i.LCC Analysis ii.Acknowledgments iii.Questions

22. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical  Conclusion i.LCC Analysis ii.Acknowledgments iii.Questions Contacts:  Patrick Murphy Vanderweil Engineers  Chris Bratz Meta Engineers  Carter Tse Kallen & Lemelson  Sharvil Patel Skanska Manufacturers:  Tim Dorman (DOAS/Wheels)  David Cunningham (Chillers)  Justin Anderson (FPIU) Advisor: Dr. Stephen Treado AE Professors/Faculty and Fellow Students Family and Friends Hunter’s Point South School

23. Britt Kern Mechanical Option  Introduction  Proposed Redesign  Mechanical Depth  Breadth – Electrical  Conclusion i.LCC Analysis ii.Acknowledgments iii.Questions Questions? Hunter’s Point South School

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30. Britt Kern Mechanical OptionHunter’s Point South School N No Shadows

31. Britt Kern Mechanical OptionHunter’s Point South School N No Shadows

32. Britt Kern Mechanical OptionHunter’s Point South School 100 feet away Difference in Height = 153 ft - 73 ft = 80 ft SohCahToa: Tan(x degrees) = 80 / 100 x = 38.7 degrees From 8:25 am on no shading. 9 am, Summer Solstice 100 ft 80 ft angle

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34. Britt Kern Mechanical OptionHunter’s Point South School Under Create Systems  Option Tab  Advanced Options

35. Britt Kern Mechanical OptionHunter’s Point South School