Transportation is one of the largest sources of greenhouse gas (GHG) emissions and urban pollution, representing approximately 17% of Australia’s GHG emissions , and 72% of the carbon monoxide emissions in Melbourne . Air pollution impacts in China have been estimated at 1.3M excess deaths per annum with associated economic costs of $US1.3trillion per annum . Any optimisation of transportation systems, whether by improved efficiency or better dispersion of exhaust fumes, has the potential to result in significant health, economic, comfort and environmental benefits.
Figure 1: Synergetics have experience using computational fluid dynamics (CFD) to model vehicle emissions. This figure shows pathlines and contours coloured by concentration for diesel train emissions in a railway tunnel.
Synergetics has a stong history of transportation works including:
- modelling haze, pollutant emissions and ventilation in tunnels to reduce potential health impacts and GHG emissions;
- modelling emissions to the atmosphere from tunnel portals to reduce community impacts;
- filtration system design for tunnels;
- airport wind modelling to quantify and minimise risks to aircraft;
- design optimisation of novel aerospace vehicles to achieve performance targets;
- modelling pollution dispersion in street canyons to quantify health impacts;
- marine vehicle design validation and optimisation through multiphase flow modelling;
- optimisation and modelling of diesel locomotive heat exchangers;
- analysis of energy efficiency and carbon saving options for train networks; and
- designing an innovative, award winning, ventilation system to improve safety when painting trains.
Figure 2: Synergetics have experience investigating and optimising transport equipment. This photo shows the internal configuration of a diesel locomotive heat exchanger unit.
 Quarterly Update of Australia’s National Greenhouse Gas Inventory: March 2014, Department of the Environment, Australian Government.
 EPA victoria website, http://www.epa.vic.gov.au/your-environment/air/vehicle-emissions-and-air-quality, accessed November 2014.
 OECD (2014). The cost of air pollution: Health impacts of road transport