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Rule reduction for control of a building cooling system using explainable AI
Cited 4 time in
Web of Science
Cited 5 time in Scopus
- Authors
- Issue Date
- 2022-11
- Publisher
- Taylor & Francis
- Citation
- Journal of Building Performance Simulation, Vol.15 No.6, pp.832-847
- Abstract
- Although it is widely acknowledged that reinforcement learning (RL) can be beneficial for building control, many RL-based control actions remain unexplainable in the daily practice of facility managers. This paper reports a rule reduction framework using explainable RL to enhance the practicality of the control strategy. First, deep Q-learning was applied to explore the optimal control strategies of a parallel cooling system (ice-based thermal system + geothermal heat pump system) of an existing office building. A set of modularized and interconnected data-driven models was developed using ANNs for pretraining an artificial agent. After exploring the control strategies, the decision-making rules of the agent were reduced using a decision tree. The performance of the reduced-order rule-based control proved comparable to the complex and uninterpretable control strategy of deep Q-learning. The difference in energy savings between the two is marginal at 1.2%.
- ISSN
- 1940-1493
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