Date:         Thu, 13 Jun 2013 20:30:33 -0500
Reply-To:     mcneely4@COX.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dave Mcneely <mcneely4@COX.NET>
Subject:      Re: Prius question with vanagon content
Comments: To: Dennis Haynes <d23haynes57@hotmail.com>
In-Reply-To:  <BAY152-DS102B23C3AAA015C47AE4CFA0800@phx.gbl>
Content-Type: text/plain; charset=utf-8

---- Dennis Haynes <d23haynes57@hotmail.com> wrote: 
> Batteries in series, voltage increases, Amp hours stays the same. 
> Batteries in parallel, voltage stays the same, Amp hour capacity increases.
> 
> Dennis

Thanks Dennis, I knew that once.  Sorry.  mcneely

> 
> 
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dave Mcneely
> Sent: Thursday, June 13, 2013 9:20 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Prius question with vanagon content
> 
> The Prius AC does use power from the traction battery:  Nickel Metal Hydride, 7.2V, 6.5 Ah per battery, 28 batteries, total V 201.6.  My owner's book does not say, but isn't that 182 Ah?
> 
> If the AC is on when running, and the engine stops, which it does frequently, the AC continues to run off the traction battery.  The traction battery is recharged both from the engine, and from the regenerative braking system, which operates whenever the brake is applied, and whenever the car feels that it is "over accelerating" on a downhill.  I have averaged 52.6 mpg over 7 years use with my 2006 (I mistyped 2005 below).  2010 models are supposed to get better mileage, partly because the AC system is more efficient, using a coolant injector rather than an expansion valve, resulting in less energy required for cooling, plus allowing a lighter weight condenser (AC condenser is a substantial weight).
> 
> mcneely
> 
> ---- Steven Johnson <sjohnso2000@GMAIL.COM> wrote: 
> > I suspect that the electric AC in the later Prius is using power from 
> > the larger battery pack which being replenished by the gasoline engine.
> > So I believe you would have to have quite a hefty battery to do the same
> > in the Vanagon configuration.   Kudos to anyone that finds out otherwise.
> > 
> > my $.02
> > 
> > Steven
> > 91 Westy
> > 
> > 
> > On Thu, Jun 13, 2013 at 4:21 PM, Scott Ohana <scottdaniel@turbovans.com>wrote:
> > 
> > > not too hard to google such things ...
> > >
> > > it would have to be a fair amount ...3.4 KW sounds like a lot of 
> > > watts to me.  Convert that to amps ...
> > > You'll find it's a lot likely, I'd think anyway.
> > >
> > >
> > > *How much current does the A/C compressor draw?*
> > > ------------------------------**------------------------------**
> > > ------------
> > > The 12,000 btu A/C in our MH draws about 1KW, ~10 Amps but it 
> > > doesn't have a reheat/remix mode/cycle as does most modern day 
> > > automatic climate control systems. So 3.4KW is likely correct for 
> > > the Prius, but given the addition cabin volume and greenhouse glass 
> > > of the new HH 6.1KW might be correct for it and the RX.
> > >
> > > They could both probably be reduced to the 1KW range via running in 
> > > recirculate, MAX COOL mode (bypasses the reheat/remix cycle), and 
> > > then using the blower speed to manually adjust the cabin temperature 
> > > to your comfort level. Purchasing and installing a coolant shutoff 
> > > valve 
> > > <http://www.greenhybrid.com/**discuss/#<http://www.greenhybrid.com/d
> > > iscuss/#>>
> > > to stop the flow of HOT coolant
> > > to the heater core would also help.
> > >
> > >
> > >
> > >
> > >
> > > On 6/13/2013 4:14 PM, Dave Mcneely wrote:
> > >
> > >> Maybe the information is in here:
> > >>
> > >> Hybrid Air Conditioning Systems Overview - OpenSIUC - Southern ...
> > >> opensiuc.lib.siu.edu/cgi/**viewcontent.cgi?article=1023&**context=a
> > >> uto.<http://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1023&c
> > >> ontext=auto.>
> > >> ..
> > >> by E Talley - 2011
> > >> Apr 1, 2011 – Talley, Eugene, "Hybrid Air Conditioning Systems Overview"
> > >> (2011). Presentations. ... Belt Driven A/C Systems ... “new” Prius 
> > >> is the
> > >> 2004 MY.
> > >>
> > >> I tried to find it, but didn't have the patience.  There is a 
> > >> photograph of the condenser label, but I could not read it.  I 
> > >> looked at my Prius
> > >> (2005 model) but the condenser is under the car and I did not crawl 
> > >> under there to look.  Pretty tight fit.  I have to put it on blocks 
> > >> to change the oil.  Next time, I'll look, but that will be a while.
> > >>
> > >> mcneely
> > >>
> > >> ---- Jim Felder <jim.felder@GMAIL.COM> wrote:
> > >>
> > >>> I was looking through the Hayne's manual this evening for a parts 
> > >>> replacement for my wife's 2003 Prius. I noticed when flipping 
> > >>> through the manual that the 2004-on Prius have electrical AC 
> > >>> compressors. Can anyone comment on what kind of current it would 
> > >>> take to run an AC compressor on electricity? One of the big 
> > >>> problems with diesel vanagon AC, besides the power issue, is the 
> > >>> mounting and location of the compressor and a way to reliably drive it with a belt. An electrical solution would obviate that.
> > >>>
> > >>> Any comments?
> > >>>
> > >>> Jim
> > >>>
> > >> --
> > >> David McNeely
> > >>
> > >>
> 
> --
> David McNeely
> 

--
David McNeely