| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1274383 | International Journal of Hydrogen Energy | 2013 | 16 Pages |
In this paper a complete dynamic model of a solid oxide fuel cell (SOFC)-based residential cogenerative (CHP) energy system has been developed, with particular attention to the heat exchangers, also in consideration to the transient response (in terms of the electricity and heat production) of the whole system.At first, the model has been implemented in Aspen Plus environment to evaluate the thermo-chemical operating conditions of the system and, subsequently, all the system components have been evaluated in Matlab®Simulink environment to analyse CHP system behaviour at variable electric loads.With the aim to achieve an optimal dimensioning of the main plant components to guarantee a suitable inertia of the system and evaluate the system global performance (efficiency, time response), suitable simulations were carried out.The global CHP FC dynamic response, in term of the current/voltage delivered by the SOFC and the hot water supplied, under a fixed load step (from 2200 to 3000 W), has been determined resulting in a delay respectively equal to 220 and 100 s. It was also evidenced the relevant inertial effect of the steam generator and the cathodic regenerator of the SOFC operation.
► Dynamic model developed to analyse the behaviour of a SOFC based CHP system. ► Plant components sizing to guarantee a suitable inertia of the CHP system. ► The system global performances have been determined through suitable simulations. ► The global CHP FC response in term of the current is equal to 220 s. ► The global CHP FC response in term of the hot water produced is equal to 100 s.
