Thermodynamic Study of a Turbocharged Diesel-Hydrogen Dual Fuel Marine Engine

In this study, a mathematical model is used in order to analyse the influence of some usual engine parameters such as compression ratio, turbocharger compressor pressure ratio, equivalence ratio, and engine speed on the performances of a Diesel-hydrogen dual fuel marine engine. The model takes into account the gas composition resulting from the combustion process and the specific heat temperature dependency of the working fluid. The analysis is based on both the first and second laws of thermodynamics using the concept of exergy analysis. Results showed that, overall, the variation in the engine operating parameters (rc, rp, N and φ) affects considerably the engine performance. Furthermore, an exergy loss mapping of the system indicates that most of exergy losses (88.2%) occur in the engine due to due to the irreversible nature of the mixing and combustion processes. The remaining components (turbo-compressor, intercooler, mixer, catalytic converter and turbine) are responsible of only 11.2% of the total exergy loss of the system. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021.