HHI EXTENDS DUAL-FUEL HIMSEN RANGE
Hyundai Heavy Industries Co. (HHI) announced at the CIMAC conference in Vancouver that it was adding a larger engine to HiMSEN’s range of dual-fuel engines.
The H54DFV engine has been designed with a 540mm bore and 600mm stroke at 600rpm and has a maximum output of 26,400 kW.
The company also announced that the new engine would be offered in both single-stage and two-stage turbocharger configurations.
Development work on the H54DFV has been implemented since January 2015, and type approval testing is provisionally foreseen for Q4 2019. Marketing would start shortly thereafter, with a view to delivering the first production engine in 2021.
As the latest expression of HHI’s sustained, vigorous investment in engine technology, the engine will feature dual valve timing system with extreme Miller cycle that is claimed to greatly limit NOx emissions as well as offering low noise and vibrations. The maximum cylinder pressure has been increased by around 30% compared with previous models.
The engine is to be produced in six to nine-cylinder in-line models and 12- to 18-cylinder vee configurations. With an output of 1,470kW per cylinder at a running speed of 600rpm, the H54DFV will span the power band from 8,820kW to 26,460kW at maximum continuous rating.
The engine’s micro-pilot injection system as well as combustion chamber design have been optimised to ensure stable combustion and efficient operation in ‘gas mode’.
Hyundai had announced in 2018 that it planned to launch a new dual-fuel engine with improved output to expand its market share in the passenger ship main propulsion market. HHI only obtained the first reference for a HiMSEN engine in a passenger vessel in 2018, when two HiMSEN H46/60V engines were installed onboard Weidong Ferry’s newbuild ro-pax, the New Golden Bridge VII.
Including land-based units, over 11,500 HiMSEN engines have been sold, representing 20% of the global medium-speed engine market.
Two-stage turbocharging system
The new engine will be available with two-stage turbocharging and single-stage turbocharging systems. The maximum cylinder pressure has been increased by around 30% compared with previous models.
According to S.H. Lee, project manager of the HHI’s H54DFV development programme, the introduction of the two stage turbocharger system has led to “significantly higher engine efficiency and an improvement in emissions performance”.
New H32CV engine
HHI also introduced a new 320mm bore conventional engine, the H32CV, at CIMAC. The H32CV engine has been designed with a 320mm bore and 450mm stroke at 720/750rpm.
The engine underwent a Type Approval Test with representatives of classification societies including KR, DNV GL, ABS, Bureau Veritas, ClassNK, and Lloyds Register in March 2019.
The weight and the volume of the engine have been optimised, permitting a 20% increase in power density. The combustion system has also been upgraded.
The intake air pressure has been increased, while enhanced Miller timing has been implemented, combining variable injection timing with intake/exhaust valve timing.
The next design in the dual-fuel programme is a dual-fuel variant of the H32CV, the H32DF, on which development is to begin in Q4 2019.
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