Re: [sumo-user] HBEFA Emission Model

[Florian Schnepf via sumo-user]

Hi Daniel,

 

What happens when there is no information about the slope?

 

I have made some tests with one network with increases and one without, as well as two HBEFA emission models.
The results show that there is very little difference on average.

• Diesel vehicle: 

With elevation: 22.319 g
without elevation: 22.495 g

• Fuel cell vehicle: 

With elevation: 6.374 g
without elevation: 6.522 g

 

I would expect consumption to be higher with elevation than without.

Does this mean that the information about the slope does not contribute to the calculation of the consumption, since it replaces the influence of acceleration?

 

Best regards
Florian

 

Gesendet: Montag, 14. August 2023 um 10:54 Uhr
Von: daniel.krajzew...@dlr.de
An: sumo-user@eclipse.org
Cc: florian.schnep...@web.de
Betreff: AW: [sumo-user] HBEFA Emission Model

Hello Florian,

 

well, no.

HBEFA has the information about the influence of slope on emissions. On the other hand, as HBEFA uses (macroscopic) traffic states, it does not use (microscopic) acceleration.

So, when deriving emissions from HBEFA, we used the slope information for replacing the missing influence of accelerations.

 

Sincerely,

Daniel

 

 

Von: sumo-user <sumo-user-boun...@eclipse.org> Im Auftrag von Florian Schnepf via sumo-user
Gesendet: Montag, 14. August 2023 10:51
An: sumo-user@eclipse.org
Cc: Florian Schnepf <florian.schnep...@web.de>
Betreff: [sumo-user] HBEFA Emission Model

 

Hello,

 

 

I read in a paper about the emission models that the HBEFA model does not depend on acceleration and therefore the slope is used for compensation. 
 

I do not understand how this is meant. Can someone explain to me how this was implemented?

 

 

Thanks a lot

 

Best regards
Florian

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