Title: Optimal Control Approaches for Analysis of Energy Use Minimization of Hybrid Ground-Coupled Heat Pump Systems
Authors: Atam, Ercan ×
Patteeuw, Dieter
Antonov, Stefan
Helsen, Lieve #
Issue Date: 17-May-2015
Publisher: Institute of Electrical and Electronics Engineers
Series Title: IEEE Transactions on Control Systems Technology vol:24 issue:2 pages:525-540
Article number: 10.1109/TCST.2015.2445851
Abstract: In this paper, we present a prediction-based dynamic programming control approach, a nonlinear model predictive
control approach and a linear optimal control approach to analyze the minimization of the total energy use of a hybrid ground coupled heat pump system (incorporating a ground-coupled heat pump, a gas boiler, a passive cooler and an active chiller) under operational constraints. A large-scale emulator model (based on finite-volume method and the equivalent diameter approach) is used for the borehole system and for assessment of different control algorithms. A nonlinear autoregressive exogenous model
(NARX) is identified from the input-output data generated by the emulator model to be used in a dynamic programming based controller. Since dynamic programming is a global optimal control method, it was used as a reference for performance assessment. Next, a state-space, reduced-order, control-oriented model with a larger sampling time is obtained from the emulator model using the so-called Proper Orthogonal Decomposition (POD)model reduction technique. This model is used in a nonlinear model predictive control (NMPC) algorithm to see how much NMPC is suboptimal with respect to the dynamic programming in terms of annual energy-use minimization. Finally, a series of linear optimal controllers based on constant heat pump coefficients of performance are tested to see how much the
system performance deteriorates. The control algorithms are
used for satisfaction of heating-cooling demands of three types of buildings: heating dominated, cooling-dominated and thermally balanced. The effects of constraining thermal build-up/depletion of ground, variable electricity prices and marginal violation of thermal comfort on the performance of the different controllers applied are also separately analyzed.
ISSN: 1063-6536
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Applied Mechanics and Energy Conversion Section
× corresponding author
# (joint) last author

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