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Date:         Wed, 10 Jun 2015 10:28:16 -0400
Reply-To:     Edward Maglott <emaglott3@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Edward Maglott <emaglott3@GMAIL.COM>
Subject:      Re: GoWesty fridge fan report
In-Reply-To:  <CAFnDXk3PPrvtFAAYeR7FOC17ixz6O7TqpW_AYEUQcdNzKz+1rg@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

The biggest improvement from a modification I saw in my fridge was insulating the hot parts from the cold parts on the back of the unit. I think that is a major culprit in decreased Delta during high ambient temp operation. I used "reflectix" type insulation on the back of the fridge wherever possible and wrapped the whole hot side of the combustion loop with insulation. I used an automotive product designed for wrapping your starter for most of it. It was about $35. Used some high temp silicon to secure it in its adapted application. I noticed banggood.com recently started selling some exhaust wrap material for cheap that would probably be a good alternative. My thought is the condenser is trying to throw off heat and all the heat from the hot side of the combustion loop is radiating around in there, offsetting the attempts of the condenser.

I have a computer fan on the back of mine, probably not as big at the gowesty one. I do think the OEM one may move more air than a computer fan, and in more of a wide cone shape across the condenser area. Another thought I've had to improve the airflow efficiency of a computer fan is to build a duct from the intake side of the fan to insure that it is pulling air from under the fridge. Those fans are designed to be mounted such that then blow hot air through an opening in a flat surface. if not in that application, some amount of the air is just going to make a loop from the output side right back around to the intake.

Edward

On Wed, Jun 10, 2015 at 7:47 AM, Jim Felder <jim.felder@gmail.com> wrote:

> But also as I installed the replacement fan I did everything one could > possibly do to the seals, the burner, and the flue. The flame roars so that > even I have no trouble hearing it with my ear anywhere near the flue vent > if I'm outside on the drivers side. If I put my face along the grill behind > the stove lid, under the window, I can feel the air being forces through > it. A first! That never happened with the original setup, which had been > replaced once with the original propeller style motors from GoWest in 2003. > > Jim > > On Tue, Jun 9, 2015 at 9:30 PM Alistair Bell <albell@shaw.ca> wrote: > > > Just looked at my old results. 22.6 C final diff. Van temp 24.8 C, fridge > > temp 2.2 . This was after 187 minutes. > > > > Well I suppose I have to translate :-) > > > > Van temp 76 F , fridge temp 36 F, delta of 40 F. > > > > You did really well especially with the high ambient temps. > > > > Alistair > > > > > > > > > > > > > > > On Jun 9, 2015, at 7:21 PM, Alistair Bell <albell@SHAW.CA> wrote: > > > > > > 45 f delta is as good as it gets I think for the dometic. I don't think > > I quite hit that differential in my testing. > > > > > > Alistair > > > > > > > > > > > >> On Jun 9, 2015, at 6:58 PM, Jim Felder <jim.felder@gmail.com> wrote: > > >> > > >> If I'd a-knowed how to do it I would-a done it. Satisfied with the > near > > 45 degree delta I'm getting now in 90+ degree weather. > > >> > > >> Jim > > >> > > >>> On Jun 9, 2015 8:34 PM, "Alistair Bell" <albell@shaw.ca> wrote: > > >>> It looks good, but Jim, Jim, jim, why don't you wire up a smarter t > > stat and controller to allow a pwm fan speed scenario? > > >>> > > >>> The fan would come on slow, ramp up to meet demand, ramp down etc. > > just like in a computer. > > >>> > > >>> Felder Industries misses another golden opportunity :-) > > >>> > > >>> Alistair > > >>> > > >>> > > >>> > > >>>> On Jun 9, 2015, at 2:14 PM, Jim Felder <jim.felder@GMAIL.COM> > wrote: > > >>>> > > >>>> Its so quiet! Looks like it does a good job moving air. Very easy to > > >>>> install with the fridge out of course. A nice cheap upgrade to the > > >>>> original. > > >>>> > > >>>> Jim > > >


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