Re: [sumo-user] FW: Electric wehicle def.

[Mirko Barthauer <m.barthauer@xxxxxxxxxxx>]

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. His thesis 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" <sumo-user@xxxxxxxxxxx>

An: "sumo-user@xxxxxxxxxxx" <sumo-user@xxxxxxxxxxx>

 

 

 

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