Model Investigation of the Performance of SI ICE Fueled by Gasoline, Methane, Hydrogen and SOFC Anode Off-Gas

The paper presents a simple 1- D model of a single cylinder spark-ignited internal combustion engine (SI ICE) created by means of the software product Ricardo WaveBuild. The model is applied for the combustion of the anode off-gas (AOG) emitted from a pre-defined solid oxide fuel cell (SOFC) that is modelled in a previous study by the same authors. The selected cell is an intermediate-temperature, anode-supported, planar cell with internal reforming of 100% methane fuel. Firstly, the geometrical and operating parameters of the cell and the engine, as well as the composition of the AOG, are presented. Then the resultant chemicals in the AOG are modelled as a synthetic fuel mixture in Ricardo WaveBuild. Finally, analysis of the performance of the modeled engine with four fuels (gasoline, methane, hydrogen and AOG synthetic fuel) is conducted. The engine model assumptions as well as the SOFC-ICE system integration for a cogeneration combined cycle, are also briefly discussed in the paper.