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Date:         Sat, 4 Aug 2007 07:13:49 -0700
Reply-To:     Mark Drillock <mdrillock@COX.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mark Drillock <mdrillock@COX.NET>
Subject:      Re: Comments wanted on this portable fridge
Comments: To: Michael Elliott <camping.elliott@GMAIL.COM>
In-Reply-To:  <46B48179.8020102@gmail.com>
Content-Type: text/plain; charset=us-ascii; format=flowed

The "45 watts" spec does not hold up to any close scrutiny. For one thing the manufacturers tech specs, well hidden though they seem to be, show a 6 or 7 amp draw. I guess that is why they say "average power consumption 45 watts". They mean including duty cycle. Divide by 12 volts and you get over 3Ah.

There is also a magazine review/test showing a Group 24 80Ah battery running it for 2 days before low voltage, on a CF-50

Still a tempting product, I may get a CF-50.

Mark

Michael Elliott wrote: > Let's see how much power this thing wants. Time for the Battery Demand > Calculator at http://www.altavistaaudio.com/Westy/Vanagon/battcalc.html > > 45 watts at 12 volts = 3.8Ah if running 100% of the time. Mfgr claims > 18% run time @ 68F, 22% @ 86F. Those are .7Ah and .83Ah, respectively. > > That's amazingly low energy consumption for a cooler. > > It uses a Danfoss compressor, as does the Norcold DC0040 which we use > and which uses quite a bit more energy. Better insulation? Better > cooling unit? > > The compressor used in the Coolmatic is the Danfoss BD35F which is > claimed to be 40% more efficient than the older Danfoss BD3. I can't > find the model number of the compressor used in the Norcold DC0040, but > if it's the same compressor, I would have to see some test results from > the Coolmatic to believe their ratings. If it's Danfoss's latest and > greatest compressor, their claims might be inflated, see for example > > http://www.kollmann-marine.com/test8.html > > which shows test results which look to bust that claim, getting only an > 11% reduction in energy consumption.* > > But hey - this could be a swell refrigerator! > > ----- > * Interesting site, they also show that a small fan in a refrigerator > increases the efficiency of the refrigerator. > > -- > Mike "Rocket J Squirrel" Elliott > 71 Type 2: the Wonderbus > 84 Westfalia: Mellow Yellow ("The Electrical Banana") > 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano > KG6RCR > > > > Frank Condelli typed: > >> Any comments on this as an extra portable fridge for the Vanagon Westy ? >> _Click here: CoolMaticCF-40_ >> (http://www.sealandsanitation.com/new_page_16.htm) >> >> >> Cheers, >> >> Frank Condelli >> Almonte, Ontario, Canada >> '87 Westy & Lionel Trains (_Collection for sale_ >> (http://members.aol.com/Fkc43/trainsal.htm) ) >> _Frank Condelli & Associates_ >> (http://members.aol.com/Fkc43/busindex.html) >> - Vanagon/Vanagon Westfalia Service in the Ottawa Valley >> _Vanagon Stainless Steel Exhaust Systems_ >> (http://members.aol.com/Fkc43/stebro.htm) >> _BusFusion_ (http://members.aol.com/BusFusion/bfhome.htm) a VW Camper >> camping event, Almonte, ON, June 07 ~ 10, 2007 >> >


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