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
>>> 
>>