Energy storage dmu

How can a DMU train save energy?

Therefore, the most suitable solution to obtain remarkable energy savings was RB. The existing DMU train uses dynamic braking to slow down from high speeds; however, the surplus of kinetic energy of the vehicle that does not feed auxiliary equipment is dissipated into heat through resistor banks (rheostatic banking).

Does Cleaner-D provide a reliable data source for the DMU?

The European project CleanER-D reported specifications for the powertrain components in different railway vehicles. Available data include detailed and validated efficiency, fuel consumption and emissions maps. Thus, this source is used in deriving and reconstructing parameters for the DMU analyzed in this paper.

How does a DMU generator work?

Note that in the case of a standard DMU vehicle, the output power of the generator is equal to the total requested power for traction and powering electrical auxiliaries, i.e. P ICE, G t = P EM t + P elaux, while in the case of a hybrid DMU it depends on the power split ratio between the two power sources, i.e. ICE-G set and ESS (see below).

What are the main data of the original DMU?

The main data of the original DMU are summarized in Table 1. Each car of the DMU is equipped with its own diesel generator, and there are not any other external power supply systems; thus, the diesel engine plays an essential role for the proper functioning of the whole system.

Can regenerated energy be saved by hybridization of existing DMU vehicles?

This paper focuses on the first two options, in particular on the assessment of potential fuel savings and emissions reduction from hybridization of existing DMU vehicles, that would enable the utilization of regenerated energy, as well as (partial or temporal) electrification of auxiliary systems.

How do we estimate the efficiency of DMUs?

To overcome this, we avoid DEA and, instead, use the monetized indicators to estimate the efficiency of the DMUs using the basic definition of efficiency, that is, the summation of (monetized) desired outputs minus the summation of (monetized) undesired outputs, divided by the summation of (monetized) inputs.