On the application of wireless sensors and actuators network in existing buildings for occupancy detection and occupancy-driven lighting control

TLDR

Buildings are a major energy consumer, and while new constructions increasingly meet sustainability standards, retrofitting older buildings remains challenging, yet low‑cost wireless sensor networks offer a promising avenue for energy savings. This study evaluates the performance and energy‑saving potential of off‑the‑shelf wireless sensor and actuator networks for occupancy detection and lighting control in an existing office building. The authors conducted an experimental assessment using low‑cost wireless sensors and actuators to monitor occupancy and drive lighting systems in the building. The experiment shows that the network provides accurate occupancy data and yields significant lighting energy savings.

Abstract

Buildings have in recent years been the target of a number of energy efficiency improvement strategies given that they are a major energy end-use sector in most countries. Whilst new buildings due to legislations, increasingly address sustainability and improved energy efficiency considerations, the refurbishment process of older buildings still presents a number of challenges. Advancement in Information and Communication Technology, particularly the application of low-cost Wireless Sensors and Actuators Network does however provide the opportunity to harness yet unrealized energy reduction in existing buildings. This paper presents results from an experimental study evaluating the performance and energy saving potentials of such off-the-shelve, low-cost wireless sensors and actuators network in an existing office building for occupancy detection and occupancy-driven lighting control. The study demonstrates that in addition to improved occupancy information obtainable from Wireless Sensors and Actuators Network, worthwhile savings in the energy consumption of the lighting systems can as well be achieved.