Operating Point Optimization of a Hydrogen Fueled Hybrid Solid Oxide Fuel Cell-Steam Turbine (SOFC-ST) Plant

Energies

Juanjo Ugartemendia¹  J. Xabier Ostolaza² 

[1] Electrical Engineering Department, University of the Basque Country UPV/EHU, Plaza Europa 1, Donostia-San Sebastián 20018, Spain; E-Mail:;Systems Engineering and Control Department, University of the Basque Country UPV/EHU, Plaza Europa 1, Donostia-San Sebastián 20018, Spain; E-Mail:

关键词: solid oxide fuel cell (SOFC);    hybrid generation;    steam turbine;    fuel cell;    wind generation;    gas turbine;    bottoming cycle;   

DOI  :  10.3390/en6105046

来源: mdpi

【 摘 要 】

This paper presents a hydrogen powered hybrid solid oxide fuel cell-steam turbine (SOFC-ST) system and studies its optimal operating conditions. This type of installation can be very appropriate to complement the intermittent generation of renewable energies, such as wind generation. A dynamic model of an alternative hybrid SOFC-ST configuration that is especially suited to work with hydrogen is developed. The proposed system recuperates the waste heat of the high temperature fuel cell, to feed a bottoming cycle (BC) based on a steam turbine (ST). In order to optimize the behavior and performance of the system, a two-level control structure is proposed. Two controllers have been implemented for the stack temperature and fuel utilization factor. An upper supervisor generates optimal set-points in order to reach a maximal hydrogen efficiency. The simulation results obtained show that the proposed system allows one to reach high efficiencies at rated power levels.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.