enlight_public_presentation_smartlighting2015_conf_v5

Smart Lighting Conference | Berlin | Frank van Tuijl | Public | 20 May 2015 | Slide 1
Frank van Tuijl – Program Coordinator
SmartLighting conference 2015
Berlin
Energy efficient & intelligent lighting systems
EnLight
A distributed, rules based lighting control
system demonstrates significant energy
savings with optimal user comfort

Content
1. Project introduction
2. Key innovation areas
3. Architectural choices
4. Intelligent Luminaire
5. Demonstration Pilots
6. Energy saving & comfort results
7. Conclusions

Project aim
To reduce energy consumption by 40% compared
to LED retrofit systems by:
• Energy efficient light source: -20%
– Electrical efficiency – Integrated drivers
– Power supply
– Communication & control
– Optical efficiency – Higher LOR
– Thermal efficiency – Lower Tj
• Intelligent control: -20%:
– The right light,
– at the right amount
– at the right place
– at the right time
Applications & energy
saving strategies:
Control
system

Consortium
27 Partners
3½ Years, Jun 2011- Nov 2014
ENAS,
IIS/EAS
IZM

Distributed intelligence
The paradigm of ‘Control by configuration’:
• Luminaires act autonomously instead of being instructed
• Sensors inform luminaires instead of controlling them
• The luminaire’s behavior (set of rules) is configured, not hard-coded
Individual Luminaires make their own lighting decisions based upon:
• Presence or ambient light level information from embedded sensors
• Events from other nodes (external sensors, luminaires, user controls, …)

Modular intra-luminaire architecture
.
Modular intra-luminaire architecture with standard Plug-and-play bus interface
to decouple lifecycles of independent technologies.
Enables market players to contribute, differentiate and compete.

Architectural choices
Project Objectives
- Reduce energy consumption
- Improve user comfort
- Easy to install/maintain
Requirements
- Granular control
- Granular sensing
- Reconfigurable application
- Wireless/wired connectivity
- Reliable operation
- Color control
- Data collection
- Low cost
-
Choices
- Autonomous luminaires
- Local control
- Local sensing
- Local monitoring
- Priority driven control
- Rule base behavior
- Publish/Subscribe
- ZigBee/IP
- MySQL database
To arbitrate
between different
control strategies
Effective with low
footprint
Loose coupling,
scalable network

Why distributed control?
• Scalability:
– Investments, complexity and intelligence grow linear with number of nodes
• Modularity and extensibility:
– Nodes can be easily added, changed and (re-)configured
– Enables luminaire differentiation in functionality and performance
• Effectiveness and reduced complexity:
– Less complex commissioning when using local embedded sensors
– Granular sensing and control increase overall energy efficiency
• Robustness:
– No single point of failure but graceful degradation when node fails
• Cost effective:
– Marginal cost increase for digital connected luminaire (Moore’s law)
– Eliminates the need for central lighting controller and area/group controllers
Note 1: A distributed control architecture does not prohibit centralized control
Note 2: Lighting management remains centralized

Power supply
LED Light Engines
PIR/LL sensors 3D sensor
Bolometer Radar sensor Smart device Switches
Buck driver
Boost driver
Embedded PIR/LL/temp sensors
Controller
Level:
1. System
2. Fixture
3. Module
Intelligent
Luminaires
External sensors
local user controls
Building blocks

Highlight ILB modules
• LED drivers: Compact 3- and 4-channel
based on NXP’s UBA3070 (buck) and
UBA3077 (boost), >95% efficiency,
expandable
• Embedded controller based on NXP’s existing
Jennic processor family (JN5168)
• Embedded sensors: Combined PIR, light level
and temperature sensors
• Power-supplies: 20W and 75W with high
efficiency up to 94% over dimming range,
+24V+5V, galvanic isolation, standby power
mode

Intelligent PowerBalance
4-channel concept:
CW/WW/Blue/Amber
16x
2x3ch
WW
A
CW
B Intra-luminaire
bus

Intelligent Luminaire features
• Local rule based engine
– 250 rules
– Programmable over the air
• 250 presets, 16 priority levels
• Independent Color control and Dimming
• Multiple independent LED light engines
• Sensors: PIR / Light Level / Temperature
• Closed loop light level control
• ZigBee
• Local logging of presence and energy consumption (24 hours)
• Intra-luminaire bus ready
Intra-luminaire
bus

Luminaires examples
• Intelligent (mini) PowerBalance
– Recessed luminaire
– 4-channel LED strings (CW/WW/Amber/Blue)
for tunable white applications
– Integrated PIR/light level/temperature sensor
• Wedge
– Expandable RGBW decorative tile
– Independent control per tile
• Intelligent Glow
– Suspended luminaire
– Independent task and ambient light (RGBW)
– Integrated PIR/light level/temperature sensor
.

Demonstrations
• Office1 @Philips Lighting, Eindhoven
– Areas: Corridor, Open Office, meeting room
• Office2 @VTT, Oulu
– Multi-functional area: Office, meeting
room, demonstration space
• Hospitality @ Osram, Garching
– Hotel room: bedroom, bathroom, corridor

• Circadian rhythm (CCT adaptation)
Demonstration - Open office
ssssssssssssssss
ssssssssssssssss
• Room occupancy detection
• Automated on/off is default setting to activate ambient light
• Desk presence/activity detection
• Automatic task light activation per desk
• Create light bubble with neighboring luminaires
• Task light tuning
• Use of Desk lights reduce overall power consumption
while keeping minimum required lighting levels.
• Daylight regulation (constant Lux-level)

Demonstration – Corridor
• Background light triggered by any presence sensor
– Ends of the corridor brighter
– Neighboring rooms trigger background light
• Light bubble (follow me)
– Smooth transition to background to make
the bubble invisible
• Part of the corridor is triggered by the entrance presence
sensor (never see a dark corridor)
• Circadian rhythm

Energy savings – Corridor
Traditional PIR control : 5.9 kWh/day
Enlight, light bubble : 4.1 kWh/day
Savings due to control : 30%
100%
71% 71%
47%
20%
presence
0
5
10
15
20
25
30
35
40
45
50
0
50
100
150
200
250
300
350
400
450
0 5 10 15 20 25
Traditional
Enlight
Presence
Energy savings
from ‘bubble’

Validation results
• 30% energy savings compared to LED state-of-the-art in Office
– Gain from granular control strategies (bubbles, daylight)
• 45% .. 80% energy savings compared to LED retrofit,
– Office 1&2: 45%
– Hospitality: 80%, more gain in luminaire efficiency, more absence time
• Results exceed the global building energy performance
benchmarks (ie. LEED 18 credit pnts, ASHRAE, Title24, …)
• Equal or even increased user comfort compared to baselines.
Over 80% of the users prefer Enlight system
EnLight Energy Saving target (40%) well surpassed

Energy saving results (vs LED SotA)
-34%
-30%
-26%
-30%
0
5
10
15
20
25
30
35
40
45
Open Office Corridor Meeting Room Total Building
LED non-retrofit
2012
Enlight 2012
LENIKWh/m2,a
Overall , Enlight 2012 system is 30% more energy efficient than the
baseline LED state-of-the –art system with standard room control

Open Office efficiency breakdown
34 %
Combined
34 %
Combined
+4 %
Desklights
+4 %
Desklights
-1 %
Luminous
Effiicacy
-1 %
Luminous
Effiicacy
-37 %
Granular occupancy
and daylight control
-37 %
Granular occupancy
and daylight control
-4 %
illuminance
correction
-4 %
illuminance
correction
+4 %
Standby
Power
+4 %
Standby
Power

Corridor efficiency breakdown
32 %
Combined
32 %
Combined
+5 %
Standby
Power
+5 %
Standby
Power
-21 %
Illuminance
correction
-21 %
Illuminance
correction
-27 %
‚‘Bubble‘
control
-27 %
‚‘Bubble‘
control
+7 %
Luminous
efficacy
+7 %
Luminous
efficacy
+3 %
Wedge
+3 %
Wedge
-32%
0,0
2,0
4,0
6,0
8,0
10,0
12,0
Corridor
KWh/m2,a

Validation results
– Office 1&2: 45%

22,3
12,4
0
5
10
15
20
25
Office
20%
luminaire design
30%
intelligent
control
44%
EnLightLEDRetrofitw.standardcontrol
Enlight
LENI[kWh/m2,a]
Office energy saving results

0
10
20
30
40
50
60
70
80
90
100
LENI[kWh/(a·m2
)]
81 %
EnLight
Retrofitw/ocontrol
EnLightw/ocontrol
42 %
luminaire design
67 %
intelligent control
67 %
intelligent controlEnLight
Hospitality energy saving results

Validation results
– Office 1&2: 45%
• Results exceed the regional building energy performance

EN15193 Office**Ashrae90.1
Ashrae90.1
Ashrae90.1
Title24
Title24
Title24
LEDretrofit2014
LEDretrofit2014
LEDretrofit2014
LEDretrofit2014
Enlight2014
Enlight2014
Enlight2014
Enlight2014
0
5
10
15
20
25
30
35
40
45
50
Open Office Corridor Meeting room Total Building
EN15193 Office**
Ashrae 90.1
Title 24
LED retrofit 2014
Enlight 2014
LENI[KWh/m2,a]
18pt
LENI Benchmarks
EnLight2014
Best-in-class energy efficiency results compared to global building
energy performance benchmarks
EnLight2014
EnLight2014
EnLight2014
18pt
18pt
0pt
0pt
0pt

Validation results
– Office 1&2: 45%
benchmarks (ie. LEED 18 credit pnts, ASRAE, Title24, …)

User comfort validation results
• The energy saving of the Enlight system does not diminish the
(visual) comfort of the office employees during their daily work.
• 80% prefers the energy saving EnLight system over state-of-the-art
LED reference system due to energy savings.
Good communication and awareness of the benefits are important to introduce new
lighting control systems.
• Smooth fading times are essential.
Noticeable changes of light are disturbing.
• People like to have control over changes in light.
Desk light is well appreciated to have control over the amount of light.

Summary
• EnLight explored a next generation distributed, rule-based lighting control
system and a modular Plug-and-Play intra-luminaire bus architecture
• EnLight proved that significant value can be added to the luminaire by
distributing the central control function over the individual luminaires
• In pilots, EnLight system with its inherent granular lighting control has
demonstrated energy savings from 30% for office applications to 60% for
hospitality applications while providing the same or a better level of user
comfort as today’s standard LED solutions
• Energy efficiency results exceed the best in class scores of the regional
building energy performance benchmarks (i.e. EN15193, ASHRAE,Title24,
LEED)

Thank you
www.enlight-project.eu

Questions
www.enlight-project.eu

Enlight won the ENIAC 2014
Innovation Award

LED Professional Magazine, Apr 2015

enlight_public_presentation_smartlighting2015_conf_v5

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