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research-article

Enhanced Power Generation in SOFCs using Artificial Limits on Actuator Control Signals

[+] Author and Article Information
Maryam Sadeghi Reineh

Department of Mechanical and Aerospace Engineering, University of California, Irvine, California 92620
sadeghm1@uci.edu

Faryar Jabbari

Professor, Department of Mechanical and Aerospace Engineering, University of California, Irvine, California 92620
fjabbari@uci.edu

1Corresponding author.

ASME doi:10.1115/1.4040057 History: Received June 30, 2017; Revised April 18, 2018

Abstract

In this paper, we study a Solid Oxide Fuel Cell (SOFC) controlled by a Multi-Input-Multi-Output (MIMO)compensator, which uses the blower/fan power and cathode inlet temperature as actuators. The usable power of the FC is maximized by limiting the air flow rate deliberately, when an increase in power demand is requested. Possible rate bounds on the cathode inlet temperature are also modeled. These bounds could represent the physical limitations (due to slow dynamics of heat exchangers) and/or a control concept for accommodating the power saving objective. Applying proper limits to the amplitude and rate of the actuator signals, and incorporating Anti-Windup (AW) techniques, can raise the net power of the FC by 16% with negligible effects on the spatial temperature profile.

Copyright (c) 2018 by ASME
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