LIGHTING A GREEN DORM

1
LIGHTING A GREEN DORM

• Taylor Ellis Bragg
• Syed Muhasin Sayeed
• Steven Michael Scardato
• Gregory Ter-Zakhariants

2
Introduction

• The costs of wasting energy
• Our project, why we are doing it, and how we went
  about it

3
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.

4
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/day423.4 kwH/year
• 423.4.08335 per year
• For entire freshman class, about 60,000
• Source http//michaelbluejay.com/electricity/cost
  .html

5
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/question4
  81.htm

6
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

7
Lighting A bright, efficient future

• Why LED's
• Current Technology
• Future Technology

8
Why LED's

• Benefits -
• Life Span
• Durability
• Maintenance
• Flexibility

9
What is an LED?

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

10
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

11
Future Technology

• Most promising lighting technology
• Cost Reducing
• 50 reduction on energy used for lighting
• 10 worldwide total energy reduction
• Environmentally Friendly

12
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-c
  ell7.htm

A Glass Cover D N-type Silicon
B Antireflective coating E P-type Silicon
C Contact Grid F Back Contact
13
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-cel
  l11.htm

14
Relevant Projects

• BJs 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
• Sources http//www.energystar.gov/ia/business/re
  tail/energy_management_csa.pdf
• http//www.energystar.gov/ia/business/r
  etail/energy_management_csa.pdf

15
Power Management Switching it upfor the better!

• Cutting down on
• unnecessary power
• consumption
• Three main lighted
• areas in any dorm
• Dorm Room, Hallway,
• and Lounge area.

16
Power Management Dorm Room

• Keep manual light switches
• Possible Improvements
• Dimmer switches ? 20-30
• Power Management workshops

Source http//www.homedepot.com/prel80/HDUS/EN_US
/pg_index.jsp?CNTTYPENAVIGATIONCNTKEYpg_index.j
spm1143053416553
17
Power Management Hallway

• Hallways arent commonly used during certain
  hours of the day
• Timers ? 40-50
• Motion Sensors ? 20-60

Source http//www.aegiswireless.com/web/pop_ups/m
otion_sensor.html
18
Power Management Lounge

• During the day ? Plenty of natural
  light
• Big Windows
• Photosensors ? 40-60

Source http//pnpng.ebigchina.com/sdp/120337/4/p
d-1088804/304115-546071.html
19
Lighting Direction Putting Lighting in its place

• Individual Needs
• If the dorm doesnt meet these with efficient
  lighting, students will be forced to meet them on
  their own
• Inefficient solutions

20
Three Choices

• One overhead light
• Desk lamps
• All-included system

21
Our Solution Include High Efficiency Desk Lamps

• Higher initial purchase costs
• Reduce student costs
• Decrease energy consumption

22
Conclusion Lighting The Dorm of the Future

• Lighting
• Power
• Power Management
• Lighting Direction