Novel emissions and noise solutions for mobile homes

Fuel cells are increasingly being used as auxiliary power units in specialised transportation applications for heating or lighting. In the EU-funded SAPIENS (SOFC auxiliary power in emissions/noise solutions) project, scientists aim to build several microtubular solid oxide fuel cell (SOFC) stacks and integrate them into hybrid power systems. These will form components of an entire fuel cell power generator. Additional components are a battery, a gas processor for fuel clean-up, and other equipment for the electrical, mechanical and control balance of plant (BOP).

Unlike other fuel cells that run on hydrogen, SAPIENS is using the globally available propane that contains more energy and is also suitable for RV appliances. During the first two years, the project drew up the requirements for this fuel cell power generation system, including size, weight, and the mechanical, electrical and data communication interfaces between the power generator and the RV. The interfaces also support camping out in the wild where RVs are not near plug-in power for several days.

Project members modelled fuel cell types such as single microtubular SOFCs, SOFC stacks and BOP in order to optimise system performance. Modelling results provided them with insight into heat transfer and the overall system. Two exhibitions showcased the RV and its fuel cell, which was also highlighted in several conference papers and journal publications.

Project partners defined and developed an integrated fuel cell system. All elements were then validated. They trialled six autogas fuel samples from service stations across Europe and found that propane and other hydrocarbons vary greatly. Cells were tested on propane and yielded positive results for fuel cell performance.

The integrated fuel cell system will be further tested and optimised in the third and final year of the project.

By integrating stacks into hybrid power systems, SAPIENS will be able to provide the RV market and enthusiasts throughout Europe with innovative noise reduction and emission options.