In Europe today, more than half of the railway network is not electrified. Especially for regional transportation, diesel electric trains (called Diesel Multiple Unit: DMU) are then widely used. ALSTOM will release next year its new regional train called Regiolis. A Regiolis train may use up to 6 diesel engines of 338 kW each, which represent a total onboard power of about 2 MW.
In this context, TRENERGY project aims at evaluating the interest of using a Rankine cycle in order to recover some lost heat and to increase the efficiency of the Diesel power packs. Rankine-cycle systems (and their derivatives like Organic Rankine Cycles, ORC) have already been investigated in the past for transportation means (train, trucks and more recently cars), but the fact is that up to now they have been mainly used for stationary equipments (power plants, heat recovery for boilers, furnaces and ovens…) or for heavy ships. For lighter transportation means, several scientific and technical bottlenecks still have to be addressed before Rankine systems may represent profitable devices for increasing energy efficiency. This is especially due to the transient behaviour of the heat source that characterizes this kind of applications.
TRENERGY will focus onto:
This joint work of ALSTOM, ENOGIA (small business), ARTS ET MÉTIERS PARISTECH-DynFluid Laboratory and IFP Energies nouvelles will materialize at the end of the project through the testing, at the engine test cell, of a prototype Rankine system, equipped with a dedicated turbine, that may prefigure a future device to be fitted onboard high energy-efficient Diesel electric locomotives. As such, the project has strong industrial potential, and should lead to strategic advantages for the partners.
As significant advances in research will be needed to attain the goals and obtain exploitable results, we expect that this project will not only increase competitiveness of the industrial partners, but also highlight the excellence of the academic partners.