Home » Public Forums » GMCnet » [GMCnet] 12v Refrigerator
| [GMCnet] 12v Refrigerator [message #150952] |
Tue, 29 November 2011 08:23  |
Peter Garry
Messages: 138
Registered: July 2011
Karma: 0
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Senior Member |
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The real problem with a frig that uses 120v is that they are extremely inefficient. Check out the marine guys, they have all kinds of ideas for refrigerators. I am considering a Danfoss 35D 12v compressor and using a cheap small frig. Throw away the orig compressor, add a lot of extra insulation around the box and hook up the Danfoss. It comes in a kit for the boaties. Check out http://www.e-zkold.com/conversion.htm#ek12a. Even better build a "box fig" with a top opening lid. Efficiency is the key.
PeterG
23' 73 Painted Desert
Calgary
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| Re: [GMCnet] 12v Refrigerator [message #150961 is a reply to message #150959] |
Tue, 29 November 2011 11:01  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| mgrue wrote on Tue, 29 November 2011 10:09 |
| Peter Garry wrote on Tue, 29 November 2011 08:23 |
The real problem with a frig that uses 120v is that they are extremely inefficient. Check out the marine guys, they have all kinds of ideas for refrigerators. I am considering a Danfoss 35D 12v compressor and using a cheap small frig. Throw away the orig compressor, add a lot of extra insulation around the box and hook up the Danfoss. It comes in a kit for the boaties. Check out http://www.e-zkold.com/conversion.htm#ek12a. Even better build a "box fig" with a top opening lid. Efficiency is the key.
PeterG
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Wonder if that Danfoss compressor would work with the original fridge? Mine does not cool as well as it could.
Mark
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Mark,
If by "original frig" you mean the DC Norcold, then the answer is yes, but ....
The Danfoss units sold for 12v operation also require a very sophisticated inverter. What I can also tell you is that they do not want to release any specifics. An owner has one that has failed and I can't figure out what the problem is.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] 12v Refrigerator [message #150963 is a reply to message #150961] |
Tue, 29 November 2011 11:24 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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The Vitrifrigo I have was also sold under the
"Americanized" name of Tundra. The Danfoss
compressor on these runs off either nominal
24 or 12 Volts DC. They are a bit more efficient
(and effective) running on 24 Volt power. They
automatically switch modes depending on what
power is applied.
There is a non-operational range in generally
the 16 to 20 Volt range. I don't have the exact
figures with me right now.
For operation on 120 Volt AC power, a dedicated
SMALL converter power supply does the conversion
to 24 Volts DC. When correctly installed, they
will run on the 120 Volt AC power (220- 240 Volt
is optional) as primary power. If "shore" power is
dropped, they will go to whatever battery power
is installed in the boat, truck, RV, etc.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> To: gmclist@temp.gmcnet.org
> From: matt7323tze@gmail.com
> Date: Tue, 29 Nov 2011 11:01:21 -0600
> Subject: Re: [GMCnet] 12v Refrigerator
>
>
>
> mgrue wrote on Tue, 29 November 2011 10:09
> > Peter Garry wrote on Tue, 29 November 2011 08:23
> > > The real problem with a frig that uses 120v is that they are extremely inefficient. Check out the marine guys, they have all kinds of ideas for refrigerators. I am considering a Danfoss 35D 12v compressor and using a cheap small frig. Throw away the orig compressor, add a lot of extra insulation around the box and hook up the Danfoss. It comes in a kit for the boaties. Check out http://www.e-zkold.com/conversion.htm#ek12a. Even better build a "box fig" with a top opening lid. Efficiency is the key.
> > >
> > > PeterG
> > Wonder if that Danfoss compressor would work with the original fridge? Mine does not cool as well as it could.
> >
> > Mark
>
> Mark,
>
> If by "original frig" you mean the DC Norcold, then the answer is yes, but ....
> The Danfoss units sold for 12v operation also require a very sophisticated inverter. What I can also tell you is that they do not want to release any specifics. An owner has one that has failed and I can't figure out what the problem is.
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumière (say show-me-air) Just about as stock as you will find
> SE Michigan - Twixt A2 and Detroit
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| Re: [GMCnet] 12v Refrigerator [message #150964 is a reply to message #150963] |
Tue, 29 November 2011 11:27 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Good stuff, Mac.
Thank you for sharing.
FWIW.... and speaking as a pilot (single engine, instrument), what did you do with the FAA?
Dolph
DE N8JPC
Wheeling, West Virginia
dolph@dolphsantorine.com
1977 GMC 26' Palm Beach
TZE167V100820
1976 GMC 26' Donor Coach
TZE166V101610
On Nov 29, 2011, at 12:24 PM, D C *Mac* Macdonald wrote:
>
> The Vitrifrigo I have was also sold under the
> "Americanized" name of Tundra. The Danfoss
> compressor on these runs off either nominal
> 24 or 12 Volts DC. They are a bit more efficient
> (and effective) running on 24 Volt power. They
> automatically switch modes depending on what
> power is applied.
>
> There is a non-operational range in generally
> the 16 to 20 Volt range. I don't have the exact
> figures with me right now.
>
> For operation on 120 Volt AC power, a dedicated
> SMALL converter power supply does the conversion
> to 24 Volts DC. When correctly installed, they
> will run on the 120 Volt AC power (220- 240 Volt
> is optional) as primary power. If "shore" power is
> dropped, they will go to whatever battery power
> is installed in the boat, truck, RV, etc.
>
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ~~ ~ D C "Mac" Macdonald ~ ~~
> ~ ~ Amateur Radio - K2GKK ~ ~
> ~ ~ USAF and FAA, Retired ~ ~
> ~ ~ ~ Oklahoma City, OK ~ ~ ~
> ~~ ~ ~ "The Money Pit" ~ ~ ~~
> ~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
> ~ www.gmcmhphotos.com/okclb ~
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
>
>
>
>> To: gmclist@temp.gmcnet.org
>> From: matt7323tze@gmail.com
>> Date: Tue, 29 Nov 2011 11:01:21 -0600
>> Subject: Re: [GMCnet] 12v Refrigerator
>>
>>
>>
>> mgrue wrote on Tue, 29 November 2011 10:09
>>> Peter Garry wrote on Tue, 29 November 2011 08:23
>>>> The real problem with a frig that uses 120v is that they are extremely inefficient. Check out the marine guys, they have all kinds of ideas for refrigerators. I am considering a Danfoss 35D 12v compressor and using a cheap small frig. Throw away the orig compressor, add a lot of extra insulation around the box and hook up the Danfoss. It comes in a kit for the boaties. Check out http://www.e-zkold.com/conversion.htm#ek12a. Even better build a "box fig" with a top opening lid. Efficiency is the key.
>>>>
>>>> PeterG
>>> Wonder if that Danfoss compressor would work with the original fridge? Mine does not cool as well as it could.
>>>
>>> Mark
>>
>> Mark,
>>
>> If by "original frig" you mean the DC Norcold, then the answer is yes, but ....
>> The Danfoss units sold for 12v operation also require a very sophisticated inverter. What I can also tell you is that they do not want to release any specifics. An owner has one that has failed and I can't figure out what the problem is.
>>
>> Matt
>> --
>> Matt & Mary Colie
>> '73 Glacier 23 Chaumière (say show-me-air) Just about as stock as you will find
>> SE Michigan - Twixt A2 and Detroit
>
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| Re: [GMCnet] 12v Refrigerator [message #150966 is a reply to message #150964] |
Tue, 29 November 2011 11:32 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
|
Senior Member |
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Ground radio repair technician at the OKC overhaul depot!
Worked on the same stuff there from 1994-2010 that I did
in the USAF from about 1975-19891 when I retired there!
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> From: dolph@dolphsantorine.com
> Date: Tue, 29 Nov 2011 12:27:09 -0500
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] 12v Refrigerator
>
> Good stuff, Mac.
>
> Thank you for sharing.
>
> FWIW.... and speaking as a pilot (single engine, instrument), what did you do with the FAA?
>
>
> Dolph
>
> DE N8JPC
> Wheeling, West Virginia
> dolph@dolphsantorine.com
>
> 1977 GMC 26' Palm Beach
> TZE167V100820
>
> 1976 GMC 26' Donor Coach
> TZE166V101610
>
>
>
> On Nov 29, 2011, at 12:24 PM, D C *Mac* Macdonald wrote:
>
> >
> > The Vitrifrigo I have was also sold under the
> > "Americanized" name of Tundra. The Danfoss
> > compressor on these runs off either nominal
> > 24 or 12 Volts DC. They are a bit more efficient
> > (and effective) running on 24 Volt power. They
> > automatically switch modes depending on what
> > power is applied.
> >
> > There is a non-operational range in generally
> > the 16 to 20 Volt range. I don't have the exact
> > figures with me right now.
> >
> > For operation on 120 Volt AC power, a dedicated
> > SMALL converter power supply does the conversion
> > to 24 Volts DC. When correctly installed, they
> > will run on the 120 Volt AC power (220- 240 Volt
> > is optional) as primary power. If "shore" power is
> > dropped, they will go to whatever battery power
> > is installed in the boat, truck, RV, etc.
> >
> > ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> > ~~ ~ D C "Mac" Macdonald ~ ~~
> > ~~ ~ ~ "The Money Pit" ~ ~ ~~
> > ~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
> > ~ www.gmcmhphotos.com/okclb ~
> > ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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