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  • Variable Turbine Area

Variable Turbine Area (VTA)

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  • 2-Stage Turbocharging
  • Variable Turbine Area
  • Waste Heat Recovery
  • Tier II Tuning Methods 2-Stroke

Lower emissions and better fuel economy

Radial turbochargers featuring adjustable nozzle vanes ahead of the turbine to vary charge air output are in wide use on automotive diesel engines.

MAN Energy Solutions has taken up the challenge of transferring this technology to large turbochargers with both axial and radial turbines for installation on large diesel engines burning heavy fuel oil (HFO), probably the most difficult engine fuel in daily use.

MAN Energy Solutions’ solution is the VTA (variable turbine area) technology which is now offered as an option for radial TCR and axial TCA turbochargers.

How VTA works

The VTA system consists of a nozzle ring equipped with adjustable vanes which can replace the fixed-vane nozzle rings in MAN Energy Solutions’ standard TCA and TCR turbochargers.

By altering the pitch of the adjustable vanes, the exhaust gas pressure is regulated and thus the air amount can be precisely matched to the quantity of injected fuel at all points in an engine’s load and speed range. The result is reduced specific fuel consumption, reduced emissions of HC and CO2 and improved engine response.

 

  • Technical data

Technical data

     SFOC change in g/kWh  
SFOC optimised load range Tuning methods 35% 50% 65% 80% 100%
High load (85-100%) Standard L engine 3.5 -1 -3.5 -3.5 0
Part load (50-85%) VTA 0.5 -4 -6.5 -4.5 0.5
Low load (25-70%) VTA -1.5 -6 -8.5 -3.5 0.5

Table 1: Optimisation possibillities - ME/ME-C engines, SMCR = L

All data provided on this site is for information purposes only, explicitly non-binding and subject to changes without further notice.

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MAN Energy Solutions SE

Turbocharger
Stadtbachstr. 1
86153 Augsburg
Germany

Phone:
+49 821 322 1345
Fax:
+49 821 322 3299
E-Mail:
turbochargers@man-es.com
34210047
  • VTA - Variable turbine area
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34210047
  • VTA Project Guide - Variable turbine area for TCA turbocharger
  • Download

Your direct benefits

  • Up to 5g/kWh lower fuel consumption
  • Lower soot and smoke emission
  • Lower CO2 emissions
  • Lower particle emissions
  • Suitable for TCA and TCR turbochargers
  • Retrofit packages
  • Short payback time
  • VTA cuts fuel consumption and reduces emissions

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