Abstract

Fuel efficiency remains crucial in transportation, especially in cost-sensitive areas like long-haul trucking. This pursuit of improved efficiency has led to interest in split-cycle engines (SCEs), such as the Double Compression Expansion Engine (DCEE). The DCEE, a compression ignition engine with a high compression ratio fueled by fossil fuels, significantly relies on minimizing heat transfer losses within the combustor. To achieve this, a triple injector setup has been proposed to reduce heat losses. As part of this thesis, experimental findings from the triple injector configuration are presented. With Net-Zero targets in focus, hydrogen internal combustion engines (ICEs) are increasingly being explored for long-haul trucking. Contrary to the traditional approach that lowers compression ratios to prevent pre-ignition, this study shows that hydrogen can be effectively utilized at a high compression ratio of 17:1 through both external and internal mixture formation. Experimental results in ultra-lean conditions suggest enhanced efficiency and reduced emissions, challenging the belief that hydrogen ICEs must function at lower compression ratios.

Biography

Aibolat Dyuisenakhmetov commenced his doctoral studies in the Mechanical Engineering program within the Physical Science and Engineering (PSE) division at King Abdullah University of Science and Technology (KAUST) in Fall 2017. He previously earned his Master of Science degree in Mechanical Engineering from KAUST, following the completion of his Bachelor of Science in Mechanical Engineering at Nazarbayev University in 2015. His doctoral research focuses on advanced combustion strategies for internal combustion engines, with particular emphasis on heavy-duty diesel and hydrogen-fueled engines.