New Generation of Turbochargers

Posted by Irina Tabakina

For the first time, MAN Diesel & Turbo will develop a turbocharger series exclusively for two-stroke engines that is especially designed and optimized to fulfill Tier III requirements. Compared to the TCA turbocharger range, TCT efficiency shows an increase of 5% through using newly-developed compressor and turbine-wheel geometry, consequently increasing waste-heat-recovery potential by 30%. The TCT range will also deliver a 10% greater air flow at a turbocharging pressure 25% higher, while being 30% smaller and 40% lighter than the existing TCA range. MAN Diesel & Turbo reports that the first TCT turbocharger is expected to reach the market in 2016 after an extensive validation and field-testing program.
“Modern turbochargers must meet many demands, including meeting technical requirements – such as Tier III compliance – at the most competitive price, having small dimensions to facilitate installation in cramped spaces, not to mention characteristics such as high operational reliability, low maintenance frequencies and a long working life. The conflict of objectives is obvious,” said Dirk Balthasar, Head of Sales and Promotion – Turbocharger Business Unit – MAN Diesel & Turbo.
MAN Diesel & Turbo reports that individual TCT turbochargers will cover a wider range of engine ratings, and that engine manufacturers will be able to use just one size for turbocharging different numbers of cylinders.
It also said that individual adaptation of the turbocharger to the engine will be by the established method of using a variety of exchangeable parts within the turbocharger, while TCT production costs can be controlled by dispensing with the alternatives required for four-stroke engines. The requirement of Tier III engines – featuring EGR technology – for wide compressor maps to cover different EGR flow rates will be met with the development of specific compressor-wheel geometries with wide compressor maps.


(As published in the November 2014 edition of Maritime Reporter & Engineering News -

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