Second Generation Two-stage Turbocharging for Large Four-strokes
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The first four-stroke engines with two-stage turbocharging are on the market. At ABB, two-stage turbocharging is already entering its second generation. On diesel engines the aim is to further enhance NOx emissions, fuel consumption and power density and on gas engines power density, load acceptance and operating flexibility. Ease-of-mainteneace is also a high priority.
Two-stage turbocharging benefits
The first generation of ABB Turbo Systems’ Power2 two-stage turbocharging concept has been successfully applied on large four-stroke engines since 2010 [1, 2, 3]. Engine efficiency gains and emissions reduction have been demonstrated which are clearly beyond the potential of single-stage turbocharging. ABB Turbo Systems has now developed the second generation of its Power2 systems for large four- stroke engines, to fully realise the potentials offered by the presence of two turbocharging stages.
A key driver is enabling extreme Miller Cycles on large four-stroke engines. On diesel...
KeywordsPressure Ratio Turbine Inlet Miller Cycle Shaft Seal High Pressure Ratio
Mass flow turbine inlet
Mass flow compressor outlet
Temperature turbine inlet
Temperature compressor inlet
The authors would like to thank the ABB Turbo Systems’ Power2 800-M project team and everyone who contributed to this new product.
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