Download - Senior Thesis Presentation
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Britt KernMechanical OptionAdvisor: Dr. Treado
Hunter’s Point South School
Queens, New York
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Britt Kern Mechanical Option
Introductioni. Building Summaryii. Site Planiii. Existing Mechanical
Proposed Redesign Mechanical Depth Breadth – Electrical Conclusion
Size: 153,769 sfOccupancy: IM/HS SchoolhouseLevels: 5 Stories/No Cellar/PenthouseCost: $61,098,000Construction Dates: Jan 10, 2011 to Oct 7, 2013
Project TeamArchitect: FXFOWLE ArchitectsStructural Ysreal A. SeinukMEP: Kallen & LemelsonCM: Skanska
Hunter’s Point South School
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Britt Kern Mechanical Option
Introductioni. Building Summaryii. Site Planiii. 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
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Britt Kern Mechanical Option
Introductioni. Building Summaryii. Site Planiii. 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
MechanicalPenthouse
ACH-1
AC
H-2
Hunter’s Point South School
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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
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. 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
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. CFD (MAE)v. Results
Breadth – Electrical Conclusion
• 2 DOAS Specified by Manufacturer
• Total Energy Recovery Wheels
• All Preheating of OA
Summer DesignWinter Design
Hunter’s Point South School
72°F, 30% RH
12.8°F, -5.4 DP
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. 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
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. CFD (MAE)v. Results
Breadth – Electrical Conclusion
• Current CHW Loop Re-Used: a. (2) 225 ton chillersb. 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
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. CFD (MAE)v. Results
Breadth – Electrical Conclusion
ρ = constant
Hunter’s Point South School
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. 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
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. 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 fpm55 fpm72°F
76°F
53 fpm 12 fpm 42 fpm77°F74.5°F
Hunter’s Point South School
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. 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 fpm60 fpm 73°F 72°F
Hunter’s Point South School
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. CFD (MAE)v. Results
Breadth – Electrical Conclusion
• Reduction in: Electricity = 7% (5% due to solar) Natural Gas = 41% Emissions = 16% CO2e
Electricity Usage by MonthNatural Gas Usage by Month
Hunter’s Point South School
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth
i. DOAS/Wheelii. FPIUiii. Chillers/Loopsiv. 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
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Britt Kern Hunter’s Point South School Mechanical Option
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical
i. Roof Layoutii. Schematiciii. Payback Analysis
Conclusion
Inverter Combiner Boxes
68.99 kW
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical
i. Roof Layoutii. Schematiciii. Payback Analysis
Conclusion
Inverter Combiner Boxes
< 9’ setbackHunter’s Point South School
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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 / 100x = 38.7 degrees
From 8:25 am on no shading.
100 ft
80 ft
Angle
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical
i. Roof Layoutii. Schematiciii. Payback Analysis
Conclusion
N
Summer Solstice
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical
i. Roof Layoutii. Schematiciii. Payback Analysis
Conclusion
Combiner Box
DC Disconnect Inverter (75 kW)
AC Disconnect
Switchboard 2
GFI Fuse
Combiner Box
Combiner Box
X 10 strings
X 10 strings
X 8 strings
Hunter’s Point South School
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical
i. Roof Layoutii. Schematiciii. 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
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Hunter’s Point South School
• 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 Analysisii. Acknowledgmentsiii. Questions
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical Conclusion
i. LCC Analysisii. Acknowledgmentsiii. 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
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Britt Kern Mechanical Option
Introduction Proposed Redesign Mechanical Depth Breadth – Electrical Conclusion
i. LCC Analysisii. Acknowledgmentsiii. Questions
• Questions?
Hunter’s Point South School
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Britt Kern Mechanical Option
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Britt Kern Mechanical OptionHunter’s Point South School
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Britt Kern Mechanical OptionHunter’s Point South School
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Britt Kern Mechanical OptionHunter’s Point South School
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Britt Kern Mechanical OptionHunter’s Point South School
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Britt Kern Mechanical OptionHunter’s Point South School
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Britt Kern Mechanical OptionHunter’s Point South School
N
No Shadows
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Britt Kern Mechanical OptionHunter’s Point South School
N
No Shadows
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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 / 100x = 38.7 degrees
From 8:25 am on no shading.
9 am, Summer Solstice
100 ft
80 ft
angle
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Britt Kern Mechanical OptionHunter’s Point South School
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Britt Kern Mechanical OptionHunter’s Point South School
Under Create Systems Option Tab Advanced Options
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Britt Kern Mechanical OptionHunter’s Point South School