MAN Turbochargers and PBS Turbo team up for turbo development

In June 2019, PBS Turbo and the MAN Turbocharger division combined under a new brand, PBST, to offer a wide range of technologies for turbocharging and exhaust-gas treatment for applications in the shipping, energy, rail transport, industrial, construction and mining sectors.


PBST offers customers all standard turbocharger sizes for two- and four-stroke engines, including the TCR series that is designed specifically for the requirements of liquid-fuel and gas engines. The recently launched TCT series can also increase the overall efficiency of four-stroke engines up to 80% as part of a two-stage application.

Mr Pissarski, PBST marketing and communications manager, says the rebranding effort has boosted the company’s engineering efforts. “For instance, we are currently developing an updated radial turbocharger series, which will be available to high-speed engine manufacturers very soon – this is a huge step for us. It will also increase our footprint in the locomotive and construction sectors.”



Two-stage turbocharging


In the marine sector, shipowners continue to focus on increasing engine efficiency and emissions reductions – both of which can be addressed by two-stage turbocharging. “In terms of two-stage turbocharging, we are considered as a market leader with more than 35M operating hours with our current applications available in the market,” notes Mr Pissarski. The company’s Ecocharge two-stage turbocharging combines low- and high-pressure stages with intercooling that improves engine performance, reducing fuel costs and emissions.


The Ecocharge principle optimally combines a low-pressure turbocharger – usually a TCA or TCR – with a high-pressure stage for which the newly developed TCX series was designed. The increase in turbocharging efficiencies, in comparison to a single-stage turbochargers, is mainly related to the intercooler – positioned between the low-pressure-stage and high-pressure-stage turbochargers – which significantly reduces the energy required to compress the intake air to high pressure. The resulting efficiencies have an instantaneous impact on the engine by advantageously increasing the air pressure over the cylinder during the scavenging process. Additionally, greater turbocharging efficiency fosters the reduction of NOx emissions through the Miller cycle, while the improved scavenging efficiencies provided by the Ecocharge system make the engine more fuel efficient

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The higher power-density generated by the Ecocharge technology presents the opportunity to choose between significantly boosting an engine’s power output or reducing engine size. The Ecocharge system’s increased efficiencies and higher cylinder rating facilitate the use of a smaller engine with the same power output of a larger unit, which employs traditional, single-stage turbocharging.




Source: www.rivieramm.com





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