Week-6 : Turbocharger Modelling

1. List down different TC and locate examples from GT Power

Ans

TYPES OF TURBOCHARGER:

• Single turbo
• Twin-turbo
• Twin-scroll turbo
• Electric turbo

GT power exmaples:

Normal Turbocharger Model

VGT model

Twin Turbo Model

2. Explore tutorial number 6 and 7

Tutorial 6

In this tutorial, the EndEnvironment template is used to prescribe the upstream and downstream boundary conditions. The model is built from compressor outlet to turbine inlet.

Brake power – 216.7 kw

Air flow rate – 1093.3 kg/h

Fuel flow rate – 51.8 kg/h

BSFC – 239.2 g/kw-h

Volumetric efficiency – 186.4%

Tutorial No. 7

3. Plot operating points on compressor and turbine maps

Ans tutorial 7 model is used to plot the operating points on compressor and turbine map. The points on the map represents the operating point.

Compressor Map

Turbine Map

4. In which application Variable Geometry Turbine is beneficial?

• High A/F ratio and high peak torque at low engine speed
• Prevent over-boosting at high engine speed
• Reduce exhaust gas emissions and improve the fuel economy
• Improve response time of the turbocharger during transient engine operations

5. Explore example- Diesel VGT EGR and understand the modeling part