Bergen Engines, a Norway-based medium-speed engine manufacturer, has successfully adapted its natural gas engines to accommodate a 25% hydrogen blend at full load, building on the 15% blend commercialized in 2022 and even testing for 30%. The question now is where is this headed – a pure hydrogen-burning combustion engine for maritime shipping? If planes can do it, why can’t ships? The answer lies in the advantages and disadvantages of liquid hydrogen. The advantage which is crucial for the aviation sector is the highly competitive energy density per unit volume – 120 MJ/L. The disadvantage is the need to keep it refrigerated to -253 Celsius. Ships typically burn the cheapest kind of refined oil – bunker fuel – and don’t…