About Trolley case energy storage power supply
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6 FAQs about [Trolley case energy storage power supply]
How much energy does a trolley battery use?
As can be seen from Tab. 2.1, the battery is dimensioned for high energy – apparently for the purpose of long independent driving without the need for a trolley supply. In the study and in other documents concerning the TROLLEY project, information about average energy consumption of 2.5 kWh/km can be found.
Why is installation of energy storage system easier in new trolleybuses?
Installation of energy storage system is easier into new trolleybuses in terms of technical challenges, because the proportion of the energy storage system can be already considered at trolleybus design and manufacture.
How much energy does a trolleybus use?
In the study and in other documents concerning the TROLLEY project, information about average energy consumption of 2.5 kWh/km can be found. Note: Our study comes to the number of 1.3 kWh/km. This result was obtained from a measurement on a smaller and lighter trolleybus 21 Tr, see Chap. 4.2.4, equation (4.8).
How much energy is wasted in a trolley?
Since the total energy wasted in the trolley is only 157.5 kWh a similar result as in 1) is obtained – namely 23.1 %. The energy loss in the trolley represents only ca. 2.5 % of the energy delivered from this trolley to the trolleybuses.
Should braking energy be stored in a trolley or ultracapacitor?
It is clearly more favorable to return the braking energy into trolley than into energy storage tank (ultracapacitor, LiFePO4 battery) in economic point of view. Most of the braking energy is consumed by another vehicles connected into the same trolley section in macroscopic point of view.
Can 21 tr trolleybus return braking energy back into trolley?
Recommendation for 21 Tr trolleybuses: 21 Tr trolleybuses were able to return braking energy back into trolley but this features was disabled due to poor reliability (thyristor failures). Solving reliability issue would be more beneficial instead of installation of electric energy storage system for utilization of braking energy.