... and optimize start-up and shut-down procedures in SOFC systems; moreover, mathematical description of transients is helpful in the diagnostic of hazardous conditions during dynamic operation (i.e., load following). Physical based models—described by differential equations—are usually complex and need...

...Amin Mirahmadi; Kia Valefi For start-up of tubular solid oxide fuel cells preheating concepts of gas heating, induction heating, sequential hybrid of gas and induction heating and concurrent hybrid of gas and induction heating were experimented. Due to impossibility of heating-up of porous electric...

...Bikash Mishra; Junxiao Wu A two phase nonisothermal 3D unsteady model is used to study the transients at start-up of a polymer electrolyte membrane fuel cell. The model is used to simulate start-up under different starting or initial conditions. The objective is to study the transient behavior...

... to avoid surge or excessive stress, especially during the critical operative phases (i.e., start-up and shutdown). Finally, the attention is focused on the valve control system developed to emulate the start-up and shutdown phases for high temperature fuel cell hybrid systems. It is necessary to manage...