KW requirements for Buses

[Rush-5]

Hi,

At a Pima Association of Governments meeting somebody asked about the
battery pack of buses, how many KW etc. Does anybody have some info that I
can pass on?

Tia,

Rush
Tucson, AZ
2000 Insight, 62lmpg, #4965
www.ironandwood.org
www.Airphibian.com
www.TEVA2.com


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[Bas Doeksen-2]

Rush schreef:
> At a Pima Association of Governments meeting somebody asked about the
> battery pack of buses, how many KW etc. Does anybody have some info that I
> can pass on?
>  
Try the information on this page: http://www.e-traction.com/whisper_3g.htm

Bas

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[Jeff Major]

Hi Rush,

This is a pretty broad question.  Buses come in many sizes and have many duty cycles.  Battery only buses are rare.  Hybrids are becoming more common.  The larger buses can have up to 300 KW power requirements and often use most of that.  Just the hotel loads are large enough too suck down a typical EV car battery pack in less than an hour.  The mid size transit bus in urban duty like those tried in Cedar Rapids had 112 of the largest golf car type batteries and could only do a couple of hours on the route.  A few buses have been built with exotic batteries like zinc-air and reportedly get better range.  There are a lot of reports, studies and info available on the web.

In short, hybrid is the way to go.  Check out HTUF.

http://www.calstart.org/programs/htuf/

They include buses as well as trucks.

Hope that helps,

Jeff M
   


--- On Thu, 9/25/08, Rush <Rush@...> wrote:

> Hi,
>
> At a Pima Association of Governments meeting somebody asked
> about the
> battery pack of buses, how many KW etc. Does anybody have
> some info that I
> can pass on?
>
> Tia,
>
> Rush

     

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[Dave King]

If you can find it Ballard has a report that shows the power requirements
for a city bus. UCDavis and Humbolt
also have the same but not as detailed.

Dave

-----Original Message-----
From: ev-bounces@... [mailto:ev-bounces@...] On Behalf
Of Jeff Major
Sent: Friday, September 26, 2008 8:54 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] KW requirements for Buses

Hi Rush,

This is a pretty broad question.  Buses come in many sizes and have many
duty cycles.  Battery only buses are rare.  Hybrids are becoming more
common.  The larger buses can have up to 300 KW power requirements and often
use most of that.  Just the hotel loads are large enough too suck down a
typical EV car battery pack in less than an hour.  The mid size transit bus
in urban duty like those tried in Cedar Rapids had 112 of the largest golf
car type batteries and could only do a couple of hours on the route.  A few
buses have been built with exotic batteries like zinc-air and reportedly get
better range.  There are a lot of reports, studies and info available on the
web.

In short, hybrid is the way to go.  Check out HTUF.

http://www.calstart.org/programs/htuf/

They include buses as well as trucks.

Hope that helps,

Jeff M
   


--- On Thu, 9/25/08, Rush <Rush@...> wrote:

> Hi,
>
> At a Pima Association of Governments meeting somebody asked
> about the
> battery pack of buses, how many KW etc. Does anybody have
> some info that I
> can pass on?
>
> Tia,
>
> Rush

     

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[David Rowe]

We have a pure electric bus (Tindo Solar Bus) here in Adelaide:

http://www.adelaidecitycouncil.com/scripts/nc.dll?ADCC:STANDARD::pc=PC_151048

The fact sheet says 200km range from a 262kWh battery pack.

On Fri, 2008-09-26 at 08:53 -0700, Jeff Major wrote:

> Hi Rush,
>
> This is a pretty broad question.  Buses come in many sizes and have many duty cycles.  Battery only buses are rare.  Hybrids are becoming more common.  The larger buses can have up to 300 KW power requirements and often use most of that.  Just the hotel loads are large enough too suck down a typical EV car battery pack in less than an hour.  The mid size transit bus in urban duty like those tried in Cedar Rapids had 112 of the largest golf car type batteries and could only do a couple of hours on the route.  A few buses have been built with exotic batteries like zinc-air and reportedly get better range.  There are a lot of reports, studies and info available on the web.
>
> In short, hybrid is the way to go.  Check out HTUF.
>
> http://www.calstart.org/programs/htuf/
>
> They include buses as well as trucks.
>
> Hope that helps,
>
> Jeff M
>    
>
>
> --- On Thu, 9/25/08, Rush <Rush@...> wrote:
>
> > Hi,
> >
> > At a Pima Association of Governments meeting somebody asked
> > about the
> > battery pack of buses, how many KW etc. Does anybody have
> > some info that I
> > can pass on?
> >
> > Tia,
> >
> > Rush
>
>
>
>      
>
> _______________________________________________
> General EVDL support: http://evdl.org/help/
> Usage guidelines: http://evdl.org/help/index.html#conv
> Archives: http://evdl.org/archive/
> Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev
>

--
Free Telephony Project
open embedded IP-PBX hardware and software
http://www.rowetel.com/ucasterisk

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[Jeff Major]

Thanks for the link, David.  Man, that is a big battery.  Like 20 to 30 times what people use for cars.

Jeff M


--- On Sat, 9/27/08, David Rowe <david@...> wrote:

> We have a pure electric bus (Tindo Solar Bus) here in
> Adelaide:
>
> http://www.adelaidecitycouncil.com/scripts/nc.dll?ADCC:STANDARD::pc=PC_151048
>
> The fact sheet says 200km range from a 262kWh battery pack.
>
> On Fri, 2008-09-26 at 08:53 -0700, Jeff Major wrote:
> > Hi Rush,
> >
> > This is a pretty broad question.  Buses come in many
> sizes and have many duty cycles.  Battery only buses are
> rare.  Hybrids are becoming more common.  The larger buses
> can have up to 300 KW power requirements and often use most
> of that.  Just the hotel loads are large enough too suck
> down a typical EV car battery pack in less than an hour.
> The mid size transit bus in urban duty like those tried in
> Cedar Rapids had 112 of the largest golf car type batteries
> and could only do a couple of hours on the route.  A few
> buses have been built with exotic batteries like zinc-air
> and reportedly get better range.  There are a lot of
> reports, studies and info available on the web.
> >
> > In short, hybrid is the way to go.  Check out HTUF.
> >
> > http://www.calstart.org/programs/htuf/
> >
> > They include buses as well as trucks.
> >
> > Hope that helps,
> >
> > Jeff M
> >    
> >
> >
> > --- On Thu, 9/25/08, Rush <Rush@...>
> wrote:
> >
> > > Hi,
> > >
> > > At a Pima Association of Governments meeting
> somebody asked
> > > about the
> > > battery pack of buses, how many KW etc. Does
> anybody have
> > > some info that I
> > > can pass on?
> > >
> > > Tia,
> > >
> > > Rush
> >
> >
> >
> >      
> >
> > _______________________________________________
> > General EVDL support: http://evdl.org/help/
> > Usage guidelines: http://evdl.org/help/index.html#conv
> > Archives: http://evdl.org/archive/
> > Subscription options:
> http://lists.sjsu.edu/mailman/listinfo/ev
> >
> --
> Free Telephony Project
> open embedded IP-PBX hardware and software
> http://www.rowetel.com/ucasterisk

     

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[Joel Sell]

Chattanooga, TN has a fleet of electric buses. They charge them at the old "Chattanooga Choo Choo" station. IIRC, they've had them for a decade or so.
Joel in Philly


     

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[Bryan Miller]

Designline have a pdf file with info on their EcoSaver IV hybrid city :-
 http://www.designlineinternational.com/electrichybrid.cfm.

80 x 42 amp/hr lead-acid storage + 4 x 42 amp/hr control
2 x SemiKron 250kw inverters
2 x Bosch RexRoth Idramat 120kw motors

Uses a 30kw or 60kw Capstone microturbine to keep the batteries charged up on the road.

"Under normal conditions, the buses will return to the depot with -60% SOC remaining within the battery pack.

Using the standard 480V twin string system, which stores - 40 KWH of energy, we can then calculate that there will be - 16 KWH of energy required to fully charge the battery pack from 60-100%.  Assuming 90% charging efficiency, this equates to 18 KWH of required energy. "