Wireless Sensor and Actuator Networks for Lighting Energy ...

Chapter 9
System Implementation and Verification in a
Shared-Space Office
The integrated research system was implemented in a small shared-space office
to verify its ability to generate energy savings and to create a satisfying lighting
condition. The lighting system was realized with a true self-configuring multi-hop
wireless sensor and actuator network. The first phase of this implementation studied the
potential energy savings simply by allowing the occupants to specify and work under
their preferred lighting. The second phase of this implementation verified the system’s
ability to automatically minimize energy usage and satisfy occupants’ lighting
preferences while harvesting daylight, and it also demonstrated the additional energy
savings.
9.1 Overview
The lighting system in a shared-space office was retrofitted with a selfconfiguring
and multi-hop wireless ballast actuator network to illustrate possible energy
savings and improved personal lighting satisfactions by enabling individual addressing
and control of each luminaire. In the first phase, the performance of this individually
addressable lighting system was evaluated by allowing the occupants to manually
specify their preferred lighting through a web interface. A 50% potential energy savings
was demonstrated simply by enabling individual control of each luminaire before any
automatic lighting control strategy. Sensors were integrated into the system in the
second phase along with the optimal lighting actuation algorithm developed in Chapter
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