Dear Petró,
although the model described in the cited publication has been integrated
into SUMO, it was a third-party contribution. I get your message that the
default values of some model constants like the efficiency factors might be
unrealistic. Even if I leave out losses at tire level (as road friction
isn't considered in other parts of the simulation either), I get still way
lower efficiency than the default values. Could you please give as the
reference you took the efficiency table from? Then we can discuss
internally how to deal with that.
If you want to discuss the topic with the original author, you can find him
e.g. on LinkedIn
<https://www.linkedin.com/in/tam%C3%A1s-kurczveil-24624a137> . His thesis
<https://doi.org/10.24355/dbbs.084-201707181031> includes an extended
description of the model (German only).
Best regards
Mirko
-----Original-Nachricht-----
Betreff: [sumo-user] FW: Electric wehicle def.
Datum: 2023-11-02T14:42:34+0100
Von: "Petró János via sumo-user" <[email protected]>
An: "[email protected]" <[email protected]>
Dear Developers
We would like to use SUMO for make a simulation of electric city bus.
Please help for us the following questions.
About the SUMO Proceeding description the Vehicle Energy Model working on:
In case ηprop is the efficiency of the total driving system between the
battery and the roadway.
Some other study has efficinency of the driveline elements and power
converter:
1. So is it correct to calculate the ηprop=ηdrive equal „Forward”
mode? Because of ηdrive ≈ ηb * ηm * ηco * ηtire ≈ 0.72, so
usually ηprop need to be 0.70÷0.80 in „Forward” mode?
2. Pconst. is the average power of constant consumer like heating,
cooling air ventilationing, air compressor, etc. which get energy
from the battery via power converter (ηpc =0.95). The equation
(3)->(2)->(5) the battery energy decreasing by the constant
consumer energy (with some others): Econst / ηprop. It looks like
the constant consumer energy goes trought the total driving
system. Please clarify for us if we think wrong, because of this
calculation cause higher consumption of constant consumer.
3. Please clarify for us what Recuperation efficiency – ηrecup –
means exactly. Is it the efficiency the total driving and power
converter system from the tires to the battery? So is it correct
to calculate the ηrecup=ηdrive equal „Backward” mode? Because of
ηdrive ≈ ηb * ηm * ηco * ηco * ηtire ≈ 0.56, so usually ηrecup
need to be 0.50÷0.60 in „Forward” mode?
4. Or should be use?
Thank You for Your short answer.
Best regards,
Petró János
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