Leah Matern Lighting/Electrical Option Faculty Advisors: Dr. Richard Mistrick and Ted Dannerth April...

Leah MaternLighting/Electrical Option

Faculty Advisors: Dr. Richard Mistrick and Ted DannerthApril 13, 2011

Crystal Lake Elementary School Lake Mary, Florida

Introduction

Lighting Depth•Covered Entrance•Primary Classroom

Electrical Depth•Emergency System Redesign•Photovoltaic Array

Structural Breadth

Conclusion

Building Overview

Building NameCrystal Lake Elementary School

LocationLake Mary, FL

OccupantStudent grades K-5, Teachers, Administrators780 Student StationsUsed as community Hurricane Shelter

Size113,927 S.F

LevelsTwo Floors

AcresEleven Acres

Introduction



Structural Breadth

Conclusion

Scope of RedesignLighting Design

Covered Entrance and Covered WalkwaysLobbyMultipurpose RoomPrimary Classroom

Electrical DesignBranch Circuit Redesign for Lighting SpacesShort Circuit AnalysisEmergency System RedesignPhotovoltaic Array Design

Structural AnalysisRoof Analysis of Addition of Photovoltaic System

Acoustical Analysis Reverberation Time Study

Introduction



Structural Breadth

Conclusion

Scope of Redesign – Presented TodayLighting Design

Covered Entrance and Covered WalkwaysLobbyMultipurpose RoomPrimary Classroom

Electrical DesignBranch Circuit Redesign for Lighting SpacesEmergency System RedesignPhotovoltaic DesignShort Circuit Analysis

Structural AnalysisRoof Analysis of Addition of Photovoltaic System

Acoustical Analysis Reverberation Time Study

Introduction



Structural Breadth

Conclusion

General Design Concepts

Focuses on Energy Efficiency

Promotes Smooth Transition throughout Spaces and Building

Promotes Productivity in the Workspaces

Creates a Welcoming and Public Environment

Introduction



Structural Breadth

Conclusion

Design Concepts

Create a Welcoming Environment

Direct Circulation towards Entrance of Building

Enhances the Building Façade

Provide Security for the Building at Night

Brick Façade

Architectural Columns

Covered walkways

Important Design Features

Introduction



Structural Breadth

Conclusion

Covered Entrance

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

Floor: Reinforced Concrete Slab

Façade: Brick Veneer

Introduction



Structural Breadth

Conclusion

Covered Entrance

Performance Data

Recommendations Actual

Average Illuminance 5 fc 7.78 fc

Power Allowance 3846 W 2700 W

Introduction



Structural Breadth

Conclusion

Design Concepts

Create a Public Environment

Highlight Educational Wall at Front of Room

Achieve Uniformity on the Workplane

Important Design Features

Educational Wall

Workplane-Student Desks

Introduction



Structural Breadth

Conclusion

Primary Classroom

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

Floor: Carpet

Façade: Vinyl Composition Tile

Introduction



Structural Breadth

Conclusion

Primary Classroom

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

Introduction



Structural Breadth

Conclusion

Emergency System Redesign

GoalsMove the Two Chillers to the

Emergency Equipment Branch

PurposeCirculate 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

Introduction



Structural Breadth

Conclusion

Emergency System Redesign

Generator Resizing

Existing Generator New Generator

Capacity 125kW 700kW

Cost per KW $555.55 $270.75

Total Cost $69,443.75 $189,525

Feeder Resizing

Panel 1L1 Panel 1LQ1

Feeder Size #3/0 #1/0

Allowable Ampacity 200A 150ARecommendations

The Benefits of Moving the Chillers to the Emergency System is not Worth the Additional Generator Cost.

Introduction



Structural Breadth

Conclusion

Photovoltaic Array

GoalsTo Decrease the Building Reliance

on Utility Company

PurposeTo Decrease the Electric Bill for Crystal Lake Elementary School

Percent of Sunny Day is Central Florida

Array Location

Introduction



Structural Breadth

Conclusion

Equipment

InverterSelectria PVI 95KW

ModulesSunPowerE19/320

Peak Power: 320WEfficiency: 19.6%

Introduction



Structural Breadth

Conclusion

Array Design

4 Arrays

4 Inverters

1,008 Panels

Generating 322.56KW Power

Solar Panel Electrical Data Inverter Electrical Data

Introduction



Structural Breadth

Conclusion

Results

Utility SavingsSize of Array

Amount of Electricity Produced by Array

(MWh)

Utility rate per MWh

Total Savings

322.56 KW 686.6 $115.14 79,055.124

Incentives $/Watt Rebate Total Savings

Florida State Grants $4/Watt (322.56 kW) $100,000 % Credit Total Savings

Federal Grants 30% of initial cost $486,360

SavingsCosts

Initial Material and Installation Cost Price/Module Number of

ModulesTotal Cost

Grid Tied System

$1,608.33 1,008 $1,621,200

Annual Operation and Maintenance Cost% of Initial Cost Total Cost/Year

0.35% $5,674

Introduction



Structural Breadth

Conclusion

Results

Recommendations

Simple Payback 14.1 years

10.9 years of profit under warranty

Benefits Outweigh Initial Cost

Introduction



Structural Breadth

Conclusion

Structural Analysis

Array Location

GoalsTo Analyze the Existing Joists and

Joist Girders

PurposeTo Determine if the Existing Roof Structure can Handle the Added

Weight of the Photovoltaic Panels

Loads

Superimposed Dead Load 15 psf

Metal Decking 2.26 psf

Roofing Material 5 psf

PV Panel Load 2.33 psf

Live Load 20 psf

Introduction



Structural Breadth

Conclusion

Structural AnalysisMaterials

Segment Material Size Self-Weight (plf)

Tributary Width

Self-Weight (psf)

Supported Load

A Existing Joist 26K9 12.2 plf 4’-10” 2.52 330 plfExisting Joist

Girder44G9N9.0K 28 plf 48’-8” 0.575 9 kips

B Existing Joist 26K9 12.2 plf 4’-7” 2.66 330 plfExisting Joist


C Existing Joist 26K9 12.2 plf 4’-9” 2.57 330 plfExisting Joist


D Existing Joist 26K9 12.2 plf 4’-9” 2.57 330 plfExisting Joist


E Existing Joist 26K9 12.2 plf 4’-9” 2.57 330 plfExisting Joist


F Existing Joist 26K9 12.2 plf 4’-9” 2.57 330 plfExisting Joist


Joist Calculations1.2*Dead Load + 1.6*Live Load = WeightWeight*Tributary Width = Supported LoadSupported Load < Supported Load of Joist OK

Joist GirderLoad*(Tributary Width/2) = Supported LoadSupported Load < Supported Load of Joist Girder OK

ResultsExisting Structural System will Support Additional Load of Photovoltaic Panels

Introduction



Structural Breadth

Conclusion

Summary

LightingEnergy 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

StructuralAddition of Photovoltaic Array is Supported by the

Existing Structural System

Introduction



Structural Breadth

Conclusion

Acknowledgements

Thank You!

Architectural Engineering FacultyClassmates and Friends

My Family

Seminole County School BoardsDana Chester

MPEDoug Matern

Ryan Strandquest

Introduction



Structural Breadth

Conclusion

Questions?

Leah Matern Lighting/Electrical Option Faculty Advisors: Dr. Richard Mistrick and Ted Dannerth April...

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