Energy-efficient operation of indirect adiabatic data center cooling systems via Newton-like phasor extremum seeking control |
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Authors: | Michele Lionello Riccardo Lucchese Mirco Rampazzo Martin Guay Khalid Atta |
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Affiliation: | 1. Department of Information Engineering, University of Padova, Padova, Italy;2. Department of Computer Science, Electrical and Space engineering, Luleå University of Technology, Luleå, Sweden;3. Department of Chemical Engineering, Queen's University, Kingston, Canada |
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Abstract: | This paper considers the problem of optimizing the operation of Indirect Adiabatic Cooling (IAC) systems with application to data centers. Optimal operation is achieved when the required cooling demand is satisfied at the minimum energy cost. For this purpose, we design a supervisory control system, where the higher layer determines the optimal set-points for the local controllers by employing an Extremum Seeking Control (ESC) scheme. In particular, we consider a Newton-like phasor ESC, which augments the derivative estimator underlying the phasor approach to capture also the Hessian of the plant index and then it uses these estimates to steer the system along a Newton-like direction. The effectiveness of the considered approach is tested in simulation by exploiting a Matlab-based simulation environment including an IAC system and a computer room. |
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Keywords: | data centers extremum seeking control indirect adiabatic cooling Newton-like |
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