Hyundai expands home-grown engine range
In a relentless drive to extend the market reach and brand power of its home-grown HiMSEN four-stroke range, Hyundai Heavy Industries’ Engine & Machinery Division (HHI-EMD) has introduced more powerful variants of its smallest medium-speed design, the H17/28.
David Tinsley writes: The release of the new H17/28U(E) series closely follows the strengthening of the medium-speed portfolio through the development of vee-form versions of the H25/33 type. The H17/28U(E) is aimed at the marine auxiliary applications and also the market for stationary power plant, and has initially been made available in six-cylinder configuration. Compared with the original H17/28 design rolled-out in 2005, offering 120kW/cylinder at a maximum 1,000rpm, the revised engine gives a 12% increase in output at 134.2kW/cyl at the corresponding running speed.
Furthermore, fuel consumption has been improved, while meeting IMO Tier II emission limits, and the design is significantly more compact, to give more flexibility in ship design and ease installation. For the present, the H17/28U(E) series comprises the H17/28E engine, delivering 110kW/cyl and a maximum mean effective pressure (MEP) of 23.1, and the H17/28U type, producing 134.2kW/cyl for a maximum MEP of 28.1. Each can be supplied at either 900rpm or 1,000rpm running speed. The six-cylinder E version therefore has a rating of 660kW and the U-type delivers 805kW, giving respective outputs of 618kW and 750kW at the generator end.
Specific fuel consumption (SFC) is given as some 189-190g/kWh for the H17/28E and 191g/kWh for the H17/28U, representing improvements in both cases over the original design. The enhanced engine applies the company’s modularised design approach and philosophy of comparative simplicity, maintainability and robustness. The dry weights of the engines are just 6.9t for the 6H17/28E and 7.1t for the 6H17/28U. Depending on the alternator used, and taking into account the common base frame, corresponding genset weights are 13.0t and 13.8t.
The first tranche of contracts for the 6H17/28E was secured in February this year, involving 12 sets, followed by orders for a further 12 sets in March.
Meanwhile, the in-line H25/33 series has been complemented by the H25/33V type in 12-, 14-, 16-, 18- and 20-cylinder configurations, suited to ship propulsion, marine auxiliary and power generation duties. The maximum output of the vee-form engines is 13% higher than that of the in-line models.
On the basis of a 340kW/cyl output in models intended for either 900 or 1,000rpm running speeds in marine genset applications, the H25/33V covers an engine power band of 4,080-6,800kW, corresponding to a 3,917-6,528kW generator power range. Projected SFC is around 183g/kWh, not taking into account engine-driven pumps. The H25/33 is produced in 720, 750, 900 and 1,000rpm versions, giving a maximum 300kW/cyl at the highest running speed.
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