This paper presents a research about free piston linear engine (FPLE) fueled with hydrogen, in which, numerical model was built to simulate the different processes that take place during the full stroke of engine. Dynamic model and thermodynamic model...
This paper presents a research about free piston linear engine (FPLE) fueled with hydrogen, in which, numerical model was built to simulate the different processes that take place during the full stroke of engine. Dynamic model and thermodynamic model were used to predict piston speed, piston acceleration, in-cylinder pressure, indicated mean effective pressure (IMEP) and indicated efficiency. The compression ratio and bore were changed to provide information for the prediction. In this paper, the thermodynamic model was calculated based on an idealized Otto cycle, including compression, combustion and expansion. Simulation results show that velocity and acceleration increase when compression ratio and bore increase. Beside, by increasing compression ratio, IMEP and indicated efficiency also increase. On the contrary, by increasing bore, IMEP and indicated efficiency will decrease accordingly.