1
POWER SAVINGS
THROUGH
LIGHTING
MANAGMENT
“Putting a Stop to Energy Waste™”
PUTTING A STOP TO ENERGY WASTE™
2
Legrand New Lighting
Management System
1) Switch Sensors
2) SCS Sensors and Room Controllers
“Putting a Stop to Energy Waste™”
PUTTING A STOP TO ENERGY WASTE™
…towards sustainable
building solutions
PUTTING A STOP TO ENERGY WASTE™
3
4
The energy dilemma in buildings
÷
+
Irreversible
growth
of energy cost
x
Increase of power
consumption
by 2050
http://www.abareconomics.com/publications_html/climate/climate_07/technology.pdf
PUTTING A STOP TO ENERGY WASTE™
22
Reduction of CO2
emissions to
avoid dramatic
climate changes
5
Legrand Lighting Management
Background
Energy users in Australia currently spend $50
billion annually on energy
It has been demonstrated that Energy-efficient
buildings can cut energy consumption (energy
bills) by up to 60%
(1) www.your building.org
PUTTING A STOP TO ENERGY WASTE™
6
Legrand Lighting Management
Background
Lighting represents 21% of energy consumed in
commercial buildings(1)
This significant cost can be reduced through the
use of good lighting management
(1) www.climatechange.gov.au
PUTTING A STOP TO ENERGY WASTE™
7
Legrand Lighting Management
Background – Why Lighting Management?
Lighting management can lead to not only
significant energy savings but also to enhanced
working environments
Sustainable building practices are rapidly gaining
mainstream acceptance as more and more people
recognize that 'green' sense is simply common
sense
PUTTING A STOP TO ENERGY WASTE™
8
Legrand Lighting Management
Lighting Management Objectives
New building
divide
lighting
energy
consumption
New
mandatory
energy
requirements
for buildings
Reduction of energy
consumption (energy bills)
Financial value
by 3
Reduction of pollution
levels (CO2 emissions)
Public value
PUTTING A STOP TO ENERGY WASTE™
9
Legrand Lighting Management
Where can we save energy?
Circulation
- Halls
- Corridors / Landings
Toilets
- Individual
- Public
Rooms
- Meeting room / Training room
- Receptions
Walking areas
- Photocopy room
- Coffee room
- Archive room / Store room
Offices
- Small office
- Open space
PUTTING A STOP TO ENERGY WASTE™
10
What are the sensing Technologies?
Technologies available
Passive Infra-red technology (PIR)
Passive Infra-Red (PIR) technology senses occupancy by detecting the difference between the
heat emitted from the human body in motion and background space (line of sight-small spaces)
Ultrasonic technology (US)
Using the Doppler principle, ultrasonic occupancy sensors work by bouncing ultrasonic sound
waves off objects in an area and measuring the time it takes for the waves to return (large spaces)
Dual technology (DUAL)
A combination that takes advantage of the best features of both PIR and ultrasonic technologies.
Using the dual-sensing mechanism, both sensing technologies must detect occupancy to turn
lighting, while continued detection by only one technology will hold lighting on
The choice of each technology depends on the surface of rooms, the walls
and how the rooms are used for (passage, long stay…)
PUTTING A STOP TO ENERGY WASTE™
11
How to select the correct Sensor?
Specific technology for each application
Compatible application
characteristics
Technology
Incompatible application
characteristics
- Small, enclosed spaces.
- Spaces where the sensor has
a complete view of the room
- Very low motion levels by
occupants
- Obstacles blocking sensor view
Ultrasonic
- Open space
- Spaces with obstacles
- High level of vibration or air flow
- High ceilings
- High level of air flow
DUAL
- Spaces with low or variable
motion levels by occupants
PIR
PUTTING A STOP TO ENERGY WASTE™
12
Legrand Lighting Management
Switch Sensors
Switch sensor
PUTTING A STOP TO ENERGY WASTE™
13
Legrand Lighting Management
Switch Sensors – Suitable for managing single or multiple areas
Advantages:
Simple and economical, easy to
install
Occupancy-mode and vacancymode available
Choice of sensor technology
(PIR, US & Dual Tech)
Daylight set point feature on
ceiling sensors
Programmable via remote
programming tool
PUTTING A STOP TO ENERGY WASTE™
14
Building Example 400sq Office
Test case
Office size
Average Energy consumption per m2
Total energy consumption in office
Working weeks a year
Working hours a year
Total working hours a year
Total energy consumption in office
Total energy consumption in office per m2
Energy cost
Energy cost - total floor
Energy cost - total floor per m2
400
20
8,000
50
60
3,000
24,000
60
0.13
3,120
7.8
m2
Watt/m 2
Watt
(Power density)
hours/year
KWh/year
KWh/year/m 2
$/KWh
$/year
$/year/m 2
Energy savings
Percentage of energy saving using PIRs
Potential energy saving using PIRs
Potential savings a year
25%
6000
780
as per EN15193 Standards
KWh/year
$/year
Business case - ROI
Average sensor cost
Average labour cost to install each sensor
Total number of sensors required
Total cost to replace sensors (investment)
Cost of investment per m 2
ROI
150
60
7
1470
3.7
1.9
$
$
CO2 emissions
State where the offices are located*
CO2 emissions reduction using sensors
CO2 emissions reduction using sensors per m2
CO2 emissions reduction equates to removing
NSW,ACT
5520
13.8
1.2
$
$
years
Select State
Kg of CO2/year
Kg of CO2/m 2/year
cars off the roads
*CO2 emissions depend on the type of fuel used to generate electricity. (Australian Green House office)
PUTTING A STOP TO ENERGY WASTE™
15
Legrand Lighting Management
Additional
Technical
Information
PUTTING A STOP TO ENERGY WASTE™
16
Legrand Lighting Management
Sensors Main functions
Operation mode
Occupancy based control (Automatic On/Off) or Vacancy based control (Manual On/Automatic Off)
Daylighting control
Control lights based on natural light
Time delay
Adjust time delay from seconds to hours
Sensitivity
Adjust sensitivity levels independently for each sensing technology
Walkthrough function
„Smart‟ delay time – shortens time delay if there is no detection after 20 seconds
Audible alerts
Alert users of impending light hut off
PUTTING A STOP TO ENERGY WASTE™
17
Legrand Lighting Management
Occupancy based control
Automatic On/Off operation
Switching lighting On and Off in response to the
occupancy of a particular space
PUTTING A STOP TO ENERGY WASTE™
18
Legrand Lighting Management
Occupancy based control – “Auto”
PUTTING A STOP TO ENERGY WASTE™
19
Legrand Lighting Management
Vacancy-based control
Manual On / Automatic Off
Switching lighting Off in response to a space becoming
vacant
This strategy is the most
energy efficient according to
European Standard EN15193,
which can achieve up to 25%
energy saving
With this strategy, the user
become eco-responsible by
switching on or off the light
PUTTING A STOP TO ENERGY WASTE™
20
Legrand Lighting Management
Vacancy-based control – “ECO”
PUTTING A STOP TO ENERGY WASTE™
21
Legrand Lighting Management
Day-lighting control
Day-lighting control
Night
When I enter the room, I press the push button to
switch ON the lights
Day- light
The sensor will automatically switch OFF the lights if
natural light level is sufficient
Day-light
down
If I’m still in the room, the light will switch ON
automatically if the light level is insufficient
Low
brightness
I leave the room, press the push button to switch OFF or the
sensor will turn it OFF automatically after a short period
* adjustable
PUTTING A STOP TO ENERGY WASTE™
22
Legrand Lighting Management
Daylighting – How it operates
Sensor in-built light level detector can be programmed to a specific
daylight threshold. Ie 500lux
This means that if natural light exceeds the daylight threshold, the
sensor will automatically turn artificial lights off (independently if there
is movement or not)
Dimming level is constantly monitored and managed by the sensor to
maintain a constant ambient light level
PUTTING A STOP TO ENERGY WASTE™
23
Legrand Lighting Management
Sensors will turn the
light On or Off based
on the amount of
daylight measured by
the photocell
Increasing Daylight levels
Daylighting – On/Off Control
Deadband, is a control
margin below a fixed
setpoint in which
minute variations in
light levels will not
trigger an On or Off
Light On
response from the
controller. This prevents
lamp cycling
Sunlight
Off delay tim e begins
Daylight setpoint
Deadband
Off delay time
Occupanc y or time based
switch operation period
Energy saved
Photoc ell light level
PUTTING A STOP TO ENERGY WASTE™
6pm
5pm
4pm
3pm
2pm
1pm
12pm
11am
10am
9am
8am
7am
6am
5am
Light Off
24
Legrand Lighting Management
Sensors will dim the
light based
on the amount of
daylight measured by
the photocell
Increasing Daylight levels
Daylighting - Dimming
Sunlight
Daylight setpoint
Deadband
Occupanc y, time based or
manual switc h operation period
Light On
Energy saved
Photoc ell light level
PUTTING A STOP TO ENERGY WASTE™
6pm
5pm
4pm
3pm
2pm
1pm
12pm
11am
10am
9am
8am
7am
6am
5am
Light Off
25
Legrand Lighting Management
Day-lighting control
Example in an open space
PUTTING A STOP TO ENERGY WASTE™
26
LEGRAND Lighting Management
Programming tools
One way communication remote
Two-way communication remote
PUTTING A STOP TO ENERGY WASTE™
27
Legrand Lighting Management
Accessories
Accessories
Light level sensors
Gateways (SCS-SCS, SCS-EIB, SCS-KNX)
Webserver
Software (Virtual configuration)
Connectors (RJ45 adaptor)
Cables, PS, Memory Module, etc
PUTTING A STOP TO ENERGY WASTE™
28
Thank you
PUTTING A STOP TO ENERGY WASTE™