Wear particle emissions from mechanical brakes on freight trains
Background
Emission of airborne particles during the braking is significant aspect of the railway brake system. The particles emitted by train are found to contain a substantial proportion of metals such as Fe, Cu and Mn. These redox active metals make the train emitted particles eight times more genotoxic than ambient particles. Unlike the brake wear emissions from automotive vehicles, which are recently regulated in the newest European emission standard Euro 7. Brake particle emissions from railway vehicles have been very poorly researched, and the exact contribution of the train brake system to the total particle emissions from railway vehicles remains unclear.
Problem description, tasks, and goals
Braking materials will be evaluated by lab experiments for normal and emergency braking. Goals: 1) To study the friction, wear and particle emission (number and mass concentration and size distribution) from various brake block and brake disc materials used on freight trains. 2) To characterize the chemical composition and microstructure of the emitted particles and estimate its environmental and health impacts.
Categories to which this degree project corresponds the best:
☒ Vehicles for Rail and Public transport
☒ Sustainability and Environment
Type of degree project (can be both)
☒ Master (20 weeks)
☒ Bachelor/Högskoleingenjör (10 weeks)
Language for the thesis
☒ Swedish and/or ☒ English
Is Swedish a language requirement?
☒ No, but Swedish is a requirement for future employment
Possibility to work from our office
☒ Yes
Green Cargo is a sustainable logistics partner and an important part of Scandinavian business life. Almost 98 percent of our transport work takes place with electric trains with a very low climate impact. Every weekday, we run 400 freight trains and replace around 9,000 truck transports on the road network every day. In our network, we serve nearly 300 locations in Sweden, Norway and Denmark, and with partners we reach the whole of Europe. We have 1,800 employees, transport approximately 20 million tonnes of goods and have an annual turnover of SEK 4.2 billion (2023).