Neural network predictive control of a SOFC fuelled with ammonia

• Main Authors: Hajimolana, S.A., Hussain, Mohd Azlan, Daud, Wan Mohd Ashri Wan, Chakrabarti, M.H.
• Format: Article
• Language: English
• Published: Electrochemical Science Group 2012
• Subjects: TA Engineering (General). Civil engineering (General); TP Chemical technology
• Online Access: http://eprints.um.edu.my/7007/1/Neural_network_predictive_control_of_a_SOFC_fuelled_with_ammonia.pdf; http://eprints.um.edu.my/7007/; http://www.electrochemsci.org/papers/vol7/7043737.pdf
• Institution: Universiti Malaya

The dynamic behavior and control of a tubular solid oxide fuel cell will be studied in this paper. The effect of fuel/air temperature and pressure will be investigated. Controlling the average stack temperature is the final objective of this study due to a high operating temperature of the system. In this case, temperature fluctuation induces thermal stress in the electrodes and electrolyte ceramics; therefore, the cell temperature distribution should be kept as constant as possible. A mathematical modeling based on first principles is developed. The fuel cell is divided into five subsystems and the factors such as mass/energy/momentum transfer, diffusion through porous media, electrochemical reactions, and polarization losses inside the subsystems are presented. Dynamic fuel-cell-tube temperature responses of the cell to step changes in conditions of the feed streams will be presented. A neural network predictive controller (NNPC) is then implemented to control the cell-tube temperature through manipulation of the temperature of the inlet air stream. The results show that the control system can successfully reject unmeasured step changes (disturbances) in the load resistance.