Re: [sumo-user] Hydrogen Fuel Cells

[The div <div@xxxxxxxx>]

Yes - there's no problem with a simulation using many different vehicle types - you're just creating a 'new' type with parameters that emulate a fuel cell powered vehicle.

By fuel cell/battery hybrid i was referring to one solution for fuel cells not coping well with surge loads (eg when accelerating) - adding a normal battery to deliver surge power that is also charged by the fuel cell. I don't think there is a way to model that in sumo.

-------- Original Message --------
On 26/11/2024 21:23, Rehab Shahin wrote:

Thanks, that's really helpful.

What I meant by differentiation between types is that both hydrogen cars and fuel cars exist in the same scenario, not a hybrid car that is both battery and hydrogen.

On Tue, 26 Nov 2024 at 15:08, The div <div@xxxxxxxx> wrote:

with the caveat that i know nothing about fuel cell behaviour;

create a vehicle type with a battery device - it's just a fuel cell instead of a battery after all

cf https://sumo.dlr.de/docs/Models/Electric.html

I'd guess you need to set

device.battery.capacity  

propulsionEfficiency

recuperationEfficiency  (zero presumably)

device.battery.maximumChargeRate

vehicleMass has a significant impact on power demand - so if fuel cells are significantly lighter/heavier than an equivalent battery you should update that value as well.

what this won't do is model what I understand is the higher efficiency variability with acceleration/power demand relative to a current EV battery.

If you have battery ev's as well just create other type(s) - but I don't see how you could do hybrid fuel cell/battery which is probably what you want.

The maximum charge rate is what will define how fast you charge - assuming the charging station is configured with sufficient power.

On Tuesday, 26 November 2024 at 14:12, Rehab Shahin <eng.rehab.s@xxxxxxxxx> wrote:

Hi,

Thanks for your responses. I was actually thinking of it, but I can’t figure out how and what parameters should be changed. For instance, if the car is refuelling at the charging station, how can I translate this to hydrogen consumption (rather than electricity)? What emission class should I use? What if the scenario includes battery electric cars, how can I differentiate between them etc.

Could you please help me identifying the list of these parameters? And if it is just multiplication by a factor, where can I do this?

Thanks for your help.

Rehab

On Tue, 26 Nov 2024 at 13:05, The div via sumo-user <sumo-user@xxxxxxxxxxx> wrote:

Why not just treat it as a battery, varying the capacity, efficiency, charge rate factors (presumably zero recuperation!) equally varying the charge station efficiency/power?

-------- Original Message --------

On 26/11/2024 12:46, Jakob Erdmann via sumo-user wrote:

My guess is, that you should be able to treat fuel cell vehicles like electric vehicles with a large battery and fast charging. You would just need to re-interpret all battery-related outputs with a conversion factor to obtain the remaining level of stored hydrogen.

Am Di., 26. Nov. 2024 um 12:22 Uhr schrieb Rehab Shahin via sumo-user <sumo-user@xxxxxxxxxxx>:

Hello,

I am exploring the possibility of simulating hydrogen fuel cell vehicles in SUMO. While I did not find explicit references to this in the documentation, I was wondering if there might be a workaround. Could the logic used for charging/fueling stations and electric vehicles be adapted to represent hydrogen vehicles and stations?

I am interested in analyzing hydrogen consumption by vehicles as well as at the fueling stations. Any guidance or suggestions on how to approach this would be greatly appreciated.

Thanks,

Rehab

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