Operation Experience with a 20 kW SOFC System

Abstract

Systems based on planar SOFC stacks have a great potential to become compact high efficient power plants. At Forschungszentrum Jülich system technology is under development aiming at a 20 kW demonstration plant. An important challenge is to realize a compact and efficient system. To achieve this, Jülich has invented an Integrated Module, which incorporates all hot parts of the system. After a few years of development four stacks with a nominal power of 5 kW were assembled and characterized with proper quality. After integrating them into the system operation was started and 21.3 kW gross power were achieved. Because of a leakage in the periphery the test had to be interrupted after 550 h of operation under load. Because repair would have taken too long, the test was continued with two modules of 5 kW power each. The system was in operation under load for 4,000 h.

Behavior of Metallic Components During 4,000 h Operation of an SOFC Stack with Carbon Containing Fuel Gas

“…Subsequently, the stack was installed into a 20 kW SOFC system. Details regarding design and operation of the 20 kW SOFC system were described in 26, 27.…”

Anode‐Supported Solid Oxide Fuel Cell Achieves 70 000 Hours of Continuous Operation

“…2016,4,939 -942 2 016 Wiley-VCH Verlag GmbH &Co. KGaA,W einheim 939 stack configuration, which is intended for stationary applications that allow higher specific stack mass per power output, which is favorable for longer operation times. [21] As part of an assessment of lifetime and long-term operational limits,i nA ugust 2007, at wo-layer shorts tack (F1002-97) commenced continuous operationa tatemperature of 700 8Ca nd current density of 0.5 Acm À2 ,o perating under humidified hydrogen( 1.4 standardl iters per minute,s lm,o fd ry hydrogen with ah umidification of 20 %) at af uel utilization of 40 %. [21] As part of an assessment of lifetime and long-term operational limits,i nA ugust 2007, at wo-layer shorts tack (F1002-97) commenced continuous operationa tatemperature of 700 8Ca nd current density of 0.5 Acm À2 ,o perating under humidified hydrogen( 1.4 standardl iters per minute,s lm,o fd ry hydrogen with ah umidification of 20 %) at af uel utilization of 40 %.…”

“…[19,20] Thes uitability of this designf or stationarya pplications has been provenw ith a2 0kWp lant that employs as ystem concept developed in Jülich. [21] As part of an assessment of lifetime and long-term operational limits,i nA ugust 2007, at wo-layer shorts tack (F1002-97) commenced continuous operationa tatemperature of 700 8Ca nd current density of 0.5 Acm À2 ,o perating under humidified hydrogen( 1.4 standardl iters per minute,s lm,o fd ry hydrogen with ah umidification of 20 %) at af uel utilization of 40 %. [20] On the cathode side ambient air, dried to ad ew point of less than À40 8C, was supplied at af low rate of 5.28 slm, which corresponds to an oxygen utilization of 25 %.…”

An On‐Demand Safety Gas Generator for Solid Oxide Fuel Cell and Electrolyzer Systems

“…Generally, an SOFC system contains a stack, off-gas burner, pre-reformer, air preheater and evaporator [20]. The fuel gas would be, for example, natural gas (NG), as its availability is mostly high.…”