RENK chalks up first sale of MARHY hybrid drive

Malcolm Latarche

Malcolm Latarche · 07 August 2019


Gearbox and transmission specialist RENK has announced the first sale of its MARHY hybrid PTO/PTI system to a newbuild small scale LNG carrier being built for Knutsen OAS at Hyundai Mipo.

The company unveiled the new system at SMM in 2016 and has been demonstrating it at exhibitions since. The announcement by the company this week says the sale was confirmed earlier this year.

This system, which is built around standard RENK components including tunnel gear-box, propeller shaft clutch, electric motor, frequency converter and couplings, enables ships with two-stroke engines to efficiently generate on-board power supply by using the main engine (PTO-operation). In addition, a fully electric drive (PTH- operation) is available for zones with low emissions zones (port areas) and for emergencies.

The newbuild is a 30,000m3 LNG carrier owned by Knutsen OAS. It is to be equipped with a 6,000kW 2-stroke main engine and is the first of this size.

RENK's scope of delivery includes a tunnel gearbox (type SHHII1600), a fully-automatic PSC-85 (Propeller shaft clutch), elastic couplings, and, for the first time, key electric components. These include a 1 MW generator/e-motor as well as the corresponding frequency converter. In addition, RENK is responsible for the system integration.

After completion of the ship at the Hyundai Mipo shipyard in South Korea, it will be stationed in the Italian Mediterranean Sea and operated by Milan-based Edison Energy. The LNG carrier is part of an infrastructure strategy, which provides for the construction of several LNG depots along the Italian coast to provide a reliable energy supply.

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