Original scientific paper
https://doi.org/10.1080/00051144.2017.1342958
Identification model and PI and PID controller design for a novel electric air heater
S. Álvarez de Miguel
; High Temperature Processes Unit, IMDEA Energy Institute, Mostoles, Madrid, Spain
J. G. Mollocana Lara
; High Temperature Processes Unit, IMDEA Energy Institute, Mostoles, Madrid, Spain
C. E. García Cena
; Escuela Tecnica Superior de Ingenierıa y Diseno Industrial, Universidad Politecnica de Madrid, Spain
M. Romero
; High Temperature Processes Unit, IMDEA Energy Institute, Mostoles, Madrid, Spain
J. M. García de María
; Escuela Tecnica Superior de Ingenierıa y Diseno Industrial, Universidad Politecnica de Madrid, Spain
J. González-Aguilar
; High Temperature Processes Unit, IMDEA Energy Institute, Mostoles, Madrid, Spain
Abstract
In this article, the software and hardware control architecture for a novel high-temperature three-phase electric air heating furnace is presented. It consists of a multiple-input singleoutput (MISO) nonlinear plant designed to heat air at flow rates in a range between 10 and 60 Nm3/h, from ambient temperature up to 1000 C. A divide-and-conquer (D&C) approach is applied. It consists in discretizing the air flow rates and working temperatures in intervals where the system behaviour is considered as single-input single-output (SISO) linear plant. Process identification techniques have been used to obtain
empiric models for different operation ranges of the electric furnace. The controller parameters have been calculated using the Ziegler–Nichols tuning method. The resulting output air temperature control is composed of a set of 12 PI and PID controllers. The switch among controllers as a function of air flow rates and temperatures is carried out using programming logic and gain scheduling technique, respectively. The resulting multiple controller has been tested under real conditions and the results are presented and discussed.
Keywords
High-temperature air heater; PI controllers; PID controllers; thermochemical heat storage test rig; three-phase electric air heating furnace
Hrčak ID:
203335
URI
Publication date:
19.9.2017.
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