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Subject:Re: Couple of minor propane fridge mods
From:Stephen Grisanti
Date:Tue, 20 Jun 2017 14:55:03 -0400

Did not intend to start a Friday-type debate so I'll blame Alistair. 

Stephen

Mobile

> On Jun 20, 2017, at 2:46 PM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:
> 
> I would personally reserve "squirrel cage" for a blower where the rotor was
> a modified cylinder rather than a plate with wings.  But that's me.
> 
> On Tue, Jun 20, 2017 at 2:42 PM, Edward Maglott <emaglott3@gmail.com> wrote:
> 
>> I agree you have squirrel cage fans there.  but there is a muffin fan too,
>> in the 3rd pic down.  the 3 little squirrel cage fans are best visible in
>> the 5th photo.  David, is a squirrel cage fan a type of centrifugal
>> blower?  Or are they by definition always the same thing?
>> 
>> I used reflectix type insulation on the back of my fridge to try to keep
>> the heat from getting into the back of the fridge.  somewhere I have photos
>> of it.  I had to cut it to fit and I think I may have done several layers
>> where there was room.
>> 
>> If this link works it will show my attempt at insulating the exhaust tube.
>> https://goo.gl/photos/LwUTcCyDjNHi7mTS8  There should be improved draft in
>> the combustion circuit because the temperature differential between the hot
>> and cold side should be greater.  I know the fridge vent plate on the
>> outside of the van is much hotter after doing this mod.  That westy habit
>> of always checking to see if the propane is still lit when you walk by...
>> Edward
>> 
>> 
>>> On Tue, Jun 20, 2017 at 12:18 PM, Alistair Bell <albell@shaw.ca> wrote:
>>> 
>>> Hi Ed,
>>> 
>>> Well the thermal wrap on the exhaust tube does reduce the heat, but not
>>> eliminate it. After about 40 min the wrap is warm, not hot. Maybe I
>> should
>>> stick the temp probe on it to give you a better feeling about it.
>>> 
>>> I know, the backside of the fridge. I couldn't figure out what to use and
>>> there is a lot of stuff in the way that makes a full back insulation
>>> difficult. But I will say that if I had suitable material I would have
>>> jammed some in between the sheet metal shroud of the "generator" ( the
>>> mineral wool insulated part above the combustion chamber) and the fridge
>>> body. That shroud does get hot. But I just didn't know what to use to
>>> insulate.
>>> 
>>> Neil documented or posted about pulling the entire heat exchanger from
>> the
>>> tube inside the fridge. I chickened out after just a little trying. It's
>>> just clipped on the tube right? Maybe I'll try again.
>>> 
>>> Ok laff it up about my thermal paste choice. I used the aluminum coloured
>>> anti sieze, im betting the copper based stuff would work even better.
>>> :-)
>>> 
>>> Alistair
>>> 
>>>> On Jun 20, 2017, at 6:37 AM, Edward Maglott <emaglott3@GMAIL.COM>
>> wrote:
>>>> 
>>>> very nice mods!  I insulated my exhaust pipe with a high temp wrap
>>> blanket
>>>> thing made to put on the starter motor.  Does your double wrap of
>>>> fiberglass tape stay pretty cool to the touch on the outside?  the one
>>>> thing I would suggest is to insulate the back of the fridge from the
>> heat
>>>> of all that hot stuff behind it.  this seemed to make a big difference
>> on
>>>> mine, along with the above mentioned insulating of the exhaust pipe.
>>>> 
>>>> I don't remember the fins coming off of the part inside the fridge that
>>>> snaps onto the cooling pipe.  seems like that was all one piece on
>> mine.
>>>> I was scared to pull on mine too.  I found that I could get my fingers
>>>> beside/behind the fins unit on the left side, at the end of the cooling
>>>> pipe and hold it, then pull on the fins unit and it came off starting
>> at
>>>> that end.  it was having quite poor contact with the cooling pipe.  for
>>>> replacing it, I first tried mayonnaise, then astroglide to improve
>>> thermal
>>>> transfer, but neither worked better than the Radio Shack thermal paste
>> I
>>>> found later.  ;)
>>>> 
>>>> Edward
>>>> 
>>>> 
>>>> 
>>>> On Mon, Jun 19, 2017 at 6:13 PM, Steven Johnson <sjohnso2000@gmail.com
>>> 
>>>> wrote:
>>>> 
>>>>> Thanks, I'll check it out.
>>>>> 
>>>>>> On Jun 19, 2017 5:50 PM, "Alistair Bell" <albell@shaw.ca> wrote:
>>>>>> 
>>>>>> About the sim based wireless control of propex. Found it , here ya go
>>>>>> Stephen, knock yerself out :-)
>>>>>> 
>>>>>> 
>>>>>> https://www.sharkbait.website/1064/controlling-the-
>>>>>> heatsource-hs2000-heater-from-your-iphone/
>>>>>> 
>>>>>> 
>>>>>> Alistair
>>>>>> 
>>>>>> 
>>>>>> On Jun 19, 2017, at 1:52 PM, Steven Johnson <sjohnso2000@GMAIL.COM>
>>>>> wrote:
>>>>>> 
>>>>>> And while you are at it Alistair, can you rig it up so it can be
>> turned
>>>>> on
>>>>>> remotely via
>>>>>> wifi on Android and iPhone?   :)
>>>>>> 
>>>>>> Steven
>>>>>> 
>>>>>> On Mon, Jun 19, 2017 at 4:39 PM, Roy Nicholl <RNicholl@nbnet.nb.ca>
>>>>> wrote:
>>>>>> 
>>>>>> Alistair,
>>>>>> 
>>>>>> 
>>>>>> Next fridge challenge:  a set of rails (one part of fridge, one part
>> in
>>>>>> 
>>>>>> van) and quick connects to allow easy installation and removal.
>>> While I
>>>>>> 
>>>>>> agree the fridge lights easily when squeaky clean and adjusted, it
>> does
>>>>> not
>>>>>> 
>>>>>> stay that way long (at least mine doesn’t).
>>>>>> 
>>>>>> 
>>>>>> I’d probably clean it more often if getting to the bench (and back)
>> was
>>>>>> 
>>>>>> smoother.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> On 19-Jun-2017, at 17:01, Alistair Bell <albell@SHAW.CA> wrote:
>>>>>> 
>>>>>> 
>>>>>> Nothing super earth shaking, just exhaust insulation and a bank of
>>> three
>>>>>> 
>>>>>> wee squirrel cage fans.
>>>>>> 
>>>>>> 
>>>>>> https://shufti.blog/2017/06/19/vanagon-a-couple-of-minor-
>> fridge-mods/
>>>>>> 
>>>>>> 
>>>>>> Alistair
>>>>>> 
>>>>>> 
>>>>>> 
>>>>> 
>>> 
>>> 
>>