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LIGHTING A GREEN DORM. Taylor Ellis Bragg Syed Muhasin Sayeed Steven Michael Scardato Gregory Ter-Zakhariants. Introduction. The costs of wasting energy Our project, why we are doing it, and how we went about it. How much electricity does lighting use?.

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LIGHTING A GREEN DORM

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LIGHTING A GREEN DORM

Taylor Ellis Bragg

Syed Muhasin Sayeed

Steven Michael Scardato

Gregory Ter-Zakhariants

Introduction

• The costs of wasting energy

• Our project, why we are doing it, and how we went about it

How much electricity does lighting use?

• Total Electricity: 10,656 kWh per year per household, 1.1 trillion kWh for the country for residential lighting

• 9.1 percent of electricity to lighting-110.6 billion kWh for the nation.

How much does this cost?

• 8.3 cents per kWh

• 9.2 billion dollars nationally for residential lighting alone

• One 60-watt light bulb on for an hour, is 0.06 kWh (60/1000)

• One 20-watt light bulb on for an hour is 0.02 kWh

• For Stanford university room, 2x60 watt incandescent light-bulbs run for 3 hours a day + 4x20 watt ceiling fluorescent bulbs for 10 hours a day=.36+.8 kwH/day=423.4 kwH/year

• 423.4*.083=\$35 per year

• For entire freshman class, about \$60,000

• Source: http://michaelbluejay.com/electricity/cost.html

Powering a 100 watt lightbulb, for a year:

• 740 lbs coal

• 5 lbs. SOx (source of acid rain)

• 5 lbs. NOx (source of acid rain, smog)

• 1,852 lbs. COx (greenhouse gas)

• Source: http://science.howstuffworks.com/question481.htm

Our Project: An Overview

• Lighting: An easy way to address energy consumption

• Numerous approaches to the problem

• Our focus: Light, Power, Power Management, Light Direction

Lighting: A bright, efficient future

• Why LED's

• Current Technology

• Future Technology

Why LED's

• Benefits -

• Life Span

• Durability

• Maintenance

• Flexibility

What is an LED?

• A solid state light source that uses an electrical signal run across a semiconductor

Current Technology

• Very attractive options for certain situations

• Traffic Lights

• Car Lights

• Not yet feasible everyday light replacements

• No market = high cost and low production

• There is a lot of research being conducted in LED technology because of its potential

Future Technology

• Most promising lighting technology

• Cost Reducing

• 50% reduction on energy used for lighting

• 10% worldwide total energy reduction

• Environmentally Friendly

Power: Plugging in to green energy

• Sunny Day  1000 W/m2

• Photovoltaic (PV) module:

Solar Cells

• Single crystal silicon

• Polycrystalline silicon

• Others

Source: http://science.howstuffworks.com/solar-cell7.htm

Storing the Energy

• Deep Cycle Batteries

• Utility Grid

• Inverter: DC  AC

• Expensive: \$9 per Watt

• prices expected to decrease in the future

Source: http://science.howstuffworks.com/solar-cell11.htm

Relevant Projects

• BJ’s Wholesale Club

• 12K sq. ft., 1330 - 2x4ft. Panels, 52-kW

• Saved \$1M, 12M kW-hr/yr

• Synergy House

• 7.5 kW

• \$77,816

• Saves 11,164 kW-hr/yr, \$1,987/yr

Power Management: Switching it up…for the better!

• Cutting down on

unnecessary power

consumption

• Three main lighted

areas in any dorm…

• Dorm Room, Hallway,

and Lounge area.

Power Management – Dorm Room

• Keep manual light switches

• Possible Improvements

• “Dimmer” switches  \$20-30

• Power Management workshops

Power Management – Hallway

• Hallways aren’t commonly used during certain hours of the day

• Timers  \$40-50

• Motion Sensors  \$20-60

Source: http://www.aegiswireless.com/web/pop_ups/motion_sensor.html

Power Management – Lounge

• During the day  Plenty of natural light

• Big Windows

• “Photosensors”  \$40-60

Source:

http://pnpng.ebigchina.com/sdp/120337/4/pd-1088804/304115-546071.html

Lighting Direction: Putting Lighting in its place

• Individual Needs

• If the dorm doesn’t meet these with efficient lighting, students will be forced to meet them on their own

• Inefficient solutions

Three Choices:

• One overhead light

• Desk lamps

• All-included system

Our Solution: Include High Efficiency Desk Lamps

• Higher initial purchase costs

• Reduce student costs

• Decrease energy consumption

Conclusion: Lighting The Dorm of the Future

• Lighting

• Power

• Power Management

• Lighting Direction