High-performance fuel cells for mobile homes
Utility of solid oxide fuel cells (SOFCs) for portable applications were previously discounted because quick start-up is required and this planar technology lacks sufficient thermal shock resistance. These issues can be addressed by the implementation of microtubular technology, opening markets like auxiliary power units (APUs). In the SAPIENS (SOFC auxiliary power in emissions/noise solutions) project, researchers built microtubular SOFC stacks and integrated them into a hybrid power system. These form central components of a fuel cell power generator. Additional components are a battery, a gas processor for fuel clean-up, and equipment for the electrical, mechanical and control balance of plant (BOP). Specifically, during the three-year lifetime of SAPIENS, researchers drew up the size and weight requirements for such a power generation system based on propane that is also suitable for RV appliances. Mechanical, electrical and data communication interfaces between the power generator and the RV were designed to support camping out in the wild where plug-in power sources are unavailable. Furthermore, SAPIENS partners modelled single microtubular SOFCs and SOFC stacks as well as BOP to optimise the overall system performance. Modelling results provided valuable insights into heat transfer. Before integrating them into a power system, each element was extensively tested on propane samples collected from service stations across Europe. By integrating SOFC stacks into a hybrid power system, SAPIENS has provided the RV market and enthusiasts throughout Europe with an innovative solution to reduce noise and pollutant emissions. Exhibitions in Dusseldorf and Birmingham showcased the new power system on an RV, which can support the electrical needs for up to two weeks.
Keywords
Recreational vehicles, solid oxide fuel cells, auxiliary power units, SAPIENS, propane
