A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LightLearn: An adaptive and occupant centered controller for lighting based on reinforcement learning
https://orcid.org/0000-0002-6014-3228
Abstract In commercial buildings, lighting contributes to about 20% of the total energy consumption. Lighting controllers that integrate occupancy and luminosity sensors to improve energy efficiency have been proposed. However, they are often ineffective because they focus solely on energy consumption rather than providing comfort to the occupants. An ideal controller should adapt itself to the preferences of the occupant and the environmental conditions. In this article, we introduce LightLearn, an occupant centered controller (OCC) for lighting based on Reinforcement Learning (RL). We describe the theory and hardware implementation of LightLearn. Our experiment during eight weeks in five offices shows that LightLearn learns the individual occupant behaviors and indoor environmental conditions, and adapts its control parameters accordingly by determining personalized set-points. Participants reported that the overall lighting was slightly improved compared to prior lighting conditions. We compare LightLearn to schedule-based and occupancy-based control scenarios, and evaluate their performance with respect to total energy use, light-utilization-ratio, unmet comfort hours, as well as light-comfort-ratio, which we introduce in this paper. We show that only LightLearn balances successfully occupant comfort and energy consumption. The adaptive nature of LightLearn suggests that reinforcement learning based occupant centered control is a viable approach to mitigate the discrepancy between occupant comfort and the goals of building control.
Graphical abstract Display Omitted
Highlights LightLearn adapts to occupant preferences and environmental conditions. Experimental demonstration of LightLearn in five offices over eight weeks. LightLearn successfully balances energy consumption with occupant comfort.
LightLearn: An adaptive and occupant centered controller for lighting based on reinforcement learning
https://orcid.org/0000-0002-6014-3228
Abstract In commercial buildings, lighting contributes to about 20% of the total energy consumption. Lighting controllers that integrate occupancy and luminosity sensors to improve energy efficiency have been proposed. However, they are often ineffective because they focus solely on energy consumption rather than providing comfort to the occupants. An ideal controller should adapt itself to the preferences of the occupant and the environmental conditions. In this article, we introduce LightLearn, an occupant centered controller (OCC) for lighting based on Reinforcement Learning (RL). We describe the theory and hardware implementation of LightLearn. Our experiment during eight weeks in five offices shows that LightLearn learns the individual occupant behaviors and indoor environmental conditions, and adapts its control parameters accordingly by determining personalized set-points. Participants reported that the overall lighting was slightly improved compared to prior lighting conditions. We compare LightLearn to schedule-based and occupancy-based control scenarios, and evaluate their performance with respect to total energy use, light-utilization-ratio, unmet comfort hours, as well as light-comfort-ratio, which we introduce in this paper. We show that only LightLearn balances successfully occupant comfort and energy consumption. The adaptive nature of LightLearn suggests that reinforcement learning based occupant centered control is a viable approach to mitigate the discrepancy between occupant comfort and the goals of building control.
Graphical abstract Display Omitted
Highlights LightLearn adapts to occupant preferences and environmental conditions. Experimental demonstration of LightLearn in five offices over eight weeks. LightLearn successfully balances energy consumption with occupant comfort.
LightLearn: An adaptive and occupant centered controller for lighting based on reinforcement learning
https://orcid.org/0000-0002-6014-3228
Abstract In commercial buildings, lighting contributes to about 20% of the total energy consumption. Lighting controllers that integrate occupancy and luminosity sensors to improve energy efficiency have been proposed. However, they are often ineffective because they focus solely on energy consumption rather than providing comfort to the occupants. An ideal controller should adapt itself to the preferences of the occupant and the environmental conditions. In this article, we introduce LightLearn, an occupant centered controller (OCC) for lighting based on Reinforcement Learning (RL). We describe the theory and hardware implementation of LightLearn. Our experiment during eight weeks in five offices shows that LightLearn learns the individual occupant behaviors and indoor environmental conditions, and adapts its control parameters accordingly by determining personalized set-points. Participants reported that the overall lighting was slightly improved compared to prior lighting conditions. We compare LightLearn to schedule-based and occupancy-based control scenarios, and evaluate their performance with respect to total energy use, light-utilization-ratio, unmet comfort hours, as well as light-comfort-ratio, which we introduce in this paper. We show that only LightLearn balances successfully occupant comfort and energy consumption. The adaptive nature of LightLearn suggests that reinforcement learning based occupant centered control is a viable approach to mitigate the discrepancy between occupant comfort and the goals of building control.
Graphical abstract Display Omitted
Highlights LightLearn adapts to occupant preferences and environmental conditions. Experimental demonstration of LightLearn in five offices over eight weeks. LightLearn successfully balances energy consumption with occupant comfort.
LightLearn: An adaptive and occupant centered controller for lighting based on reinforcement learning
Park, June Young (author) / Dougherty, Thomas (author) / Fritz, Hagen (author) / Nagy, Zoltan (author)
Building and Environment ; 147 ; 397-414
2018-10-13
18 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2019
| British Library Conference Proceedings | 2019
On adaptive occupant-learning window blind and lighting controls
| Online Contents | 2014
On adaptive occupant-learning window blind and lighting controls
| Taylor & Francis Verlag | 2014