Date: Tue, 11 Jul 2017 09:52:01 -0700
Reply-To: David McNeely <davmcneely40@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David McNeely <davmcneely40@GMAIL.COM>
Subject: Re: resurrection?
In-Reply-To: <8C02C50C-F36D-4FCC-BE95-DF8A920490BB@shaw.ca>
Content-Type: text/plain; charset="UTF-8"
Alistair (not Allison, sorry) and all, I can get similar delta t on AC (did
recently anyway), but not on propane. And by the way, on the most recent
test on propane, the pipe behind the cooling fins in the refrigerator did
frost, but the fins themselves did not. But I know that the propane line
to the burner was impaired, and possibly the orifice is partially clogged
for the same reason. I have now found a local who MAY be able to make a
new line (his employees state that he has the material, the tools, and the
ability) but he has been out of town. I will take him the line this week
and see what he can do. I will also order a new propane nozzle if he
indeed can make me a new line. Beyond that, I am at a loss, and will
probably give up on the refrigerator.
mcneely
On Tue, Jul 11, 2017 at 7:56 AM, Alistair Bell <albell@shaw.ca> wrote:
> Last couple of weeks I've been testing my fridge extensively, recording
> various data etc.
>
> Years ago I managed a delta t of 22-23 c on propane. Now I'm just barely
> hitting 21 c delta t on propane . I use the term delta t for the diff
> between van and fridge temp.
>
> 21 c diff is fairly close to a 40 f diff.
>
> Best in the last test group (7 different tests ) was a delta t of 21.4 C.
> This was in a hot van, 91.4 F, so fridge temp only got to 54F.
>
> I'm trying to match or better my old record of delta t 22 C , and the
> great rate of cooling, after some mods I made
>
> spoiler, I think some mods counterproductive to cooling when on propane
>
> Btw, AC power working fine, for example at end of my last test, last
> evening, I switched to AC power and dropped fridge to -1.1 C with van temp
> at 18.4
> That's 30 f in fridge at 65 f in van , delta t of 35 f.
> The lowish delta t is, I think , due to the fridge cycling at that low
> fridge temp. I've had larger delta t with AC power.
>
> Anyway, I agree with jim that 40 F diff is as good as it gets .
>
> I hope to finish up my series of experiments soon and publish :-)
>
> ( on the blog)
>
> Alistair
>
>
>
>
> > On Jul 11, 2017, at 7:07 AM, Jim Felder <jim.felder@GMAIL.COM> wrote:
> >
> > 40 under ambient is normal, I think.
> >
> > Jim
> >
> > On Tue, Jul 11, 2017 at 8:57 AM David McNeely <davmcneely40@gmail.com>
> > wrote:
> >
> >> Not a member of the list. Negra Modelo.
> >>
> >> Coldest the refrigerator got on propane was 4.4 C (40 F) at 6:00 a.m.
> this
> >> morning after running for 16 hours. Ambient temperature this morning,
> 54
> >> F. That would be ok if ambient was always 54 F.
> >>
> >> Don't know where to go from here.
> >>
> >> mcneely
> >>
> >> On Mon, Jul 10, 2017 at 7:35 PM, Stacy Schneider <vwcrewman@gmail.com>
> >> wrote:
> >>
> >>> Hopefully the guy is not a member of this list. I hope you offered him
> a
> >>> proper beverage either hit or cold to his liking.
> >>>
> >>> Stacy
> >>>
> >>> Sent from my iPhone
> >>>
> >>>> On Jul 10, 2017, at 5:55 PM, David McNeely <davmcneely40@GMAIL.COM>
> >>> wrote:
> >>>>
> >>>> Some of you may recall the incident where I knocked my Dometic 182b
> >>>> refrigerator off the work table and it seemed to have died. The
> burner
> >>> box
> >>>> was cracked along one edge, the brazing for the drain tube to burner
> >> box
> >>>> was cracked, the tube was bent, and perhaps there were other damages.
> >>> All
> >>>> was due to my neighbors unfriendly dog entering my workshop while I
> was
> >>>> working on the refrigerator.
> >>>>
> >>>> Before we left for camping last week, the neighbor, whom I had
> inferred
> >>>> responded indifferently to the incident, came over to apologize for
> the
> >>>> dog's behavior, and his abrupt departure without making inquiries
> >>>> concerning consequences. He had wanted to get the dog safely
> >> ensconced,
> >>>> and had to depart for work.
> >>>>
> >>>> Turns out that work involves welding, and he also has his own
> >> equipment.
> >>>> He came over this morning, fashioned a new drain tube, brazed the
> >> cracked
> >>>> burner box and brazed the drain tube back properly. I had previously
> >>>> cleaned the propane line to the burner box, though I am not sure how
> >>>> adequately. I also found that the lack of 12 V power to the
> >> refrigerator
> >>>> was due to a loose connection that powers both the refrigerator and
> the
> >>>> fresh water tank pump.
> >>>>
> >>>> When everything was properly hooked up and checked for leaks (none),
> >> the
> >>>> refrigerator started immediately on propane. Ambient temperature this
> >>>> afternoon is 82 F. The refrigerator is cooling. We'll see how cold
> it
> >>>> gets.
> >>>>
> >>>> mcneely
> >>>
> >>
>
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