Turbocharger manufacturer PBST reported the first installation of its TCT60 single-stage axial turbocharger in a two-stroke engine being built by South Korea’s HSD Engine
Installed in an MAN B&W 6G70ME-C10.5 LP-SCR engine, the TCT60 turbocharger is part of the TCT turbocharger series launched by PBST in 2019. Introduction of the TCT60 followed the rollout of the TCT40 and TCT50 turbochargers. Designed for conventional and dual-fuel two- and four-stroke engines, the TCT series comprises six frame sizes, ranging from TCT30 to TCT80, and covering supercharged engine outputs from 7,500 kW to 24,030 kW.
PBST parent Man Energy Solutions announced the first orders for the TCT60 in September 2020 for three 158,000-dwt Suezmax tankers for Yasa Tanker, each equipped with an MAN B&W 6G70ME-C10.5 prime mover.
Key components of the series are a newly developed radial compressor and axial turbine. Both were developed using simulation technologies and paired with new design features, resulting in a very compact and lightweight turbocharger design – a 40% decrease in weight and 30% reduction in size compared with previous turbocharger series, said PBST.
PBST said the superior charging efficiencies, wide compressor maps and ample matching options allow TCT turbochargers to be matched to a large range of engines. Their variability covers not only a wide range of engine-tuning options and fuel types, but also all new requirements of current exhaust-gas after-treatment systems for IMO Tier III operations.
For the initial installation in the HSD-built engine, shop tests for the two-stroke engine were completed in April. Covid-19 restrictions required that these tests were carried out with local HSD, MAN PrimeServ and PBST staff on-site and remote support provided by a PBST development team and performance engineers in Copenhagen. Engineers in Copenhagen attended remotely via an MAN PrimeServ EyeTech link – an assisted-reality, remote-support tool that facilitates mobile videoconferences via data glasses.
HSD Engine initial design team manager Hyundong Hwang said, “HSD is proud to be the first engine builder to apply the PBST TCT60 turbocharger to a two-stroke application. We thank PBST for their great support during the turbocharger matching, especially considering the unique constraints imposed by the pandemic.”
PBST head of sales and licence, turbocharger & exhaust gas treatment Asia Pacific, Manuel Stork said, “It’s a significant step for the PBST portfolio as another turbocharger type makes its debut in the market. Thanks to great support locally – as well as remotely from MAN Energy Solutions in Augsburg and Copenhagen – we managed to smoothly execute the shop test despite the limitations imposed by the pandemic. Notably, the TCT60 matched first time with the engine without requiring the changing of any flow parts – to HSD’s great satisfaction.”
For two-stroke engines, TCT-series turbochargers are suitable for engines ranging from 5.5 MW up to 24 MW per turbocharger. Typical applications include as prime movers for container ships, large bulk carriers or tankers.
However, TCT turbochargers are high-performance solutions and not just aimed at low-speed engines; they are also suitable for the two-stage turbocharging of four-stroke, medium-speed engines. For MAN’s Ecocharge systems, they are paired with TCX-series turbochargers as high-pressure stages. In this configuration, turbocharging efficiency levels of up to 80% – a market-leading accomplishment – can be achieved. Medium-speed engines with Ecocharge systems provide fuel-efficient power for applications such as cruise ships, but also power plants that supply electricity to entire cities.
A brand of MAN Energy Solutions SE, PBST offers single- and two-stage turbochargers and integrated exhaust gas after-treatment systems. These are employed in a broad range of applications within the marine, power-generation, rail, industrial and construction-machinery sectors. Supported by the MAN PrimeServ after-sales network, PBST has production sites in Germany, the Czech Republic and China.
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