Crystal Lake Elementary School
Lake Mary, Florida
Leah Matern
Lighting/Electrical Option
Faculty Advisors: Dr. Richard Mistrick and Ted Dannerth
April 13, 2011
Building Overview
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Building Name
Crystal Lake Elementary School
Location
Lake Mary, FL
Occupant
Student grades K-5, Teachers, Administrators
780 Student Stations
Used as community Hurricane Shelter
Size
113,927 S.F
Levels
Two Floors
Acres
Eleven Acres
Scope of Redesign
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Lighting Design
Covered Entrance and Covered Walkways
Lobby
Multipurpose Room
Primary Classroom
Electrical Design
Branch Circuit Redesign for Lighting Spaces
Short Circuit Analysis
Emergency System Redesign
Photovoltaic Array Design
Structural Analysis
Roof Analysis of Addition of Photovoltaic System
Acoustical Analysis
Reverberation Time Study
Scope of Redesign – Presented Today
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Lighting Design
Covered Entrance and Covered Walkways
Lobby
Multipurpose Room
Primary Classroom
Electrical Design
Branch Circuit Redesign for Lighting Spaces
Emergency System Redesign
Photovoltaic Design
Short Circuit Analysis
Structural Analysis
Roof Analysis of Addition of Photovoltaic System
Acoustical Analysis
Reverberation Time Study
General Design Concepts
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Focuses on Energy Efficiency
Promotes Smooth Transition throughout Spaces and
Building
Promotes Productivity in the Workspaces
Creates a Welcoming and Public Environment
Design Concepts
Important Design Features
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Create a Welcoming Environment
Direct Circulation towards Entrance of Building
Enhances the Building Façade
Provide Security for the Building at Night
Structural Breadth
Conclusion
Architectural Columns
Brick Façade
Covered walkways
Covered Entrance
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Criteria
Horizontal Illuminance: 5 fc
Power Allowance: 1.2 W/ft2
: 30W/linear ft Door Width
Materials
Ceiling: Exterior Drywall
Column: White Painted Concrete
: Brick Veneer
Structural Breadth
Floor: Reinforced Concrete Slab
Façade: Brick Veneer
Conclusion
Covered Entrance
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Performance Data
Recommendations
Actual
Average Illuminance
5 fc
7.78 fc
Power Allowance
3846 W
2700 W
Design Concepts
Important Design Features
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Workplane-Student
Desks
Create a Public Environment
Highlight Educational Wall at Front of Room
Achieve Uniformity on the Workplane
Educational Wall
Primary Classroom
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Criteria
Horizontal Illuminance: 30 fc
Vertical Illuminance: 30 fc
Power Allowance: 1.4 W/ft2
Materials
Ceiling: Acoustical Ceiling Tile
Wall: White Latex Paint
Doors: Gray Latex Paint
Structural Breadth
Floor: Carpet
Façade: Vinyl Composition Tile
Conclusion
Primary Classroom
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Performance Data
Recommendations
Actual
Vertical Illuminance
30 fc
36.5 fc
Average Illuminance at
Taskplane
30 fc
36.6 fc
Power Allowance
1365 W
741 W
Emergency System Redesign
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Goals
Move the Two Chillers to the
Emergency Equipment Branch
Purpose
Circulate Cooled Air throughout to
Decrease Humidity and the
Decrease the Spread of Disease
Panel
Changes
Panel 1L1 Removed 4 Circuits
Decreased the Actual Connected Load from
324A to 309A
Decreased the MCB from 450A to 400A
Panel
1LQ1
Added 4 Circuits
Decreased the Actual Load from 126A to
116A due to 1560W for spare circuits
removed for 600W of Chiller Controls
Emergency System Redesign
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Feeder Resizing
Panel 1L1
Panel 1LQ1
Feeder Size
#3/0
#1/0
Allowable Ampacity
200A
150A
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Generator Resizing
Existing Generator
New Generator
Capacity
125kW
700kW
Cost per KW
$555.55
$270.75
Total Cost
$69,443.75
$189,525
Recommendations
The Benefits of Moving the
Chillers to the Emergency
System is not Worth the
Additional Generator Cost.
Photovoltaic Array
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Goals
To Decrease the Building Reliance
on Utility Company
Purpose
To Decrease the Electric Bill for
Crystal Lake Elementary School
Percent of Sunny Day is Central Florida
Structural Breadth
Conclusion
Array Location
Equipment
Introduction
Modules
SunPowerE19/320
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Peak Power: 320W
Efficiency: 19.6%
Inverter
Selectria PVI 95KW
Array Design
Introduction
Solar Panel Electrical Data
Lighting Depth
• Covered Entrance
• Primary Classroom
4 Arrays
4 Inverters
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
1,008 Panels
Generating 322.56KW Power
Inverter Electrical Data
Results
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Grid Tied
System
Costs
Savings
Initial Material and Installation Cost
Price/Module
Number of
Modules
$1,608.33
1,008
Utility Savings
Amount of Electricity Utility rate per
Produced by Array
MWh
(MWh)
686.6
$115.14
Total Cost
Size of
Array
$1,621,200
Annual Operation and Maintenance Cost
% of Initial Cost
Total Cost/Year
0.35%
$5,674
322.56 KW
Florida State Grants
Federal Grants
Incentives
$/Watt Rebate
$4/Watt (322.56 kW)
% Credit
30% of initial cost
Total
Savings
79,055.124
Total Savings
$100,000
Total Savings
$486,360
Results
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Recommendations
Simple Payback 14.1 years
10.9 years of profit under warranty
Benefits Outweigh Initial Cost
Structural Analysis
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Goals
To Analyze the Existing Joists and
Joist Girders
Loads
Superimposed Dead Load 15 psf
Metal Decking 2.26 psf
Purpose
To Determine if the Existing Roof
Structure can Handle the Added
Weight of the Photovoltaic Panels
Roofing Material 5 psf
PV Panel Load 2.33 psf
Live Load 20 psf
Array Location
Structural Analysis
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Materials
Segment
A
B
C
D
E
Structural Breadth
F
Conclusion
Material
Existing Joist
Existing Joist
Girder
Existing Joist
Existing Joist
Girder
Existing Joist
Existing Joist
Girder
Existing Joist
Existing Joist
Girder
Existing Joist
Existing Joist
Girder
Existing Joist
Existing Joist
Girder
Size
26K9
44G9N9.0K
Self-Weight
(plf)
12.2 plf
28 plf
Tributary
Width
4’-10”
48’-8”
Self-Weight
(psf)
2.52
0.575
Supported
Load
330 plf
9 kips
26K9
32G7N9.0K
12.2 plf
24 plf
4’-7”
48’-8”
2.66
0.493
330 plf
9 kips
26K9
28G5N9.0K
12.2 plf
16 plf
4’-9”
48’-8”
2.57
0.329
330 plf
9 kips
26K9
40G8N9.0K
12.2 plf
26 plf
4’-9”
48’-8”
2.57
0.534
330 plf
9 kips
26K9
48G10N9.0K
12.2 plf
37 plf
4’-9”
48’-8”
2.57
0.760
330 plf
9 kips
26K9
28G6N9.0K
12.2 plf
20 plf
4’-9”
48’-8”
2.57
0.411
330 plf
9 kips
Joist Calculations
1.2*Dead Load + 1.6*Live Load = Weight
Weight*Tributary Width = Supported Load
Supported Load < Supported Load of Joist OK
Joist Girder
Load*(Tributary Width/2) = Supported Load
Supported Load < Supported Load of Joist Girder OK
Results
Existing Structural System will Support Additional Load
of Photovoltaic Panels
Summary
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Lighting
Energy Efficient Design Creates a Welcoming and
Productive Environment
Electrical
Create Comfort and Decrease Spread of Disease by
Circulating Cooled Air throughout Emergency Shelter
With No Cost Benefits
Decreased Buildings Energy Consumption by
Generating Power Through a Photovoltaic Array
Structural
Addition of Photovoltaic Array is Supported by the
Existing Structural System
Acknowledgements
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Thank You!
Architectural Engineering Faculty
Classmates and Friends
My Family
Seminole County School Boards
Dana Chester
MPE
Doug Matern
Ryan Strandquest
Introduction
Lighting Depth
• Covered Entrance
• Primary Classroom
Electrical Depth
• Emergency System
Redesign
• Photovoltaic Array
Structural Breadth
Conclusion
Questions?