Title: Moving-boundary modelling and LQ control study for a solar linear Fresnel reflector

Authors: Jessica Leo; Frans Davelaar; Gildas Besançon; Alina Voda

Addresses: EDF-R&D, 6 quai Watier, 78401 Chatou Cedex, France; Université Grenoble Alpes, GIPSA-lab, F-38000 Grenoble, France; CNRS, GIPSA-lab, F-38000 Grenoble, France ' EDF-R&D, 6 quai Watier, 78401 Chatou Cedex, France ' Université Grenoble Alpes, GIPSA-lab, F-38000 Grenoble, France; CNRS, GIPSA-lab, F-38000 Grenoble, France ' Université Grenoble Alpes, GIPSA-lab, F-38000 Grenoble, France; CNRS, GIPSA-lab, F-38000 Grenoble, France

Abstract: This paper presents a study on a so-called linear Fresnel reflector (LFR). It is a linear solar concentrator system that can be connected to a combined cycle power plant (CCPP) to improve the performance of the resulting plant, called an integrated solar combined cycle. First, the modelling of the system is addressed, based on a physical approach, with an optical part on the one hand, and a thermal part on the other hand, using a moving-boundary technique. Then, the system behaviour is studied in simulation under solar radiation fluctuations. Eventually, considering that the superheated steam produced by the LFR is to be injected into a CCPP, a linear quadratic approach is proposed for its control. Finally, simulation results confirm that this control law is appropriate to regulate the output steam enthalpy.

Keywords: solar; linear Fresnel reflector; LFR; moving-boundary; linear quadratic regulator; LQR.

DOI: 10.1504/IJMIC.2017.085294

International Journal of Modelling, Identification and Control, 2017 Vol.28 No.1, pp.14 - 27

Received: 20 Feb 2016
Accepted: 31 May 2016
Published online: 21 Jul 2017 *

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