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Old 17-05-2013, 16:28   #46
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Re: Engel portable frig.........

Quote:
Originally Posted by w32honu View Post
If I read this correctly.................

12Ahrs or 153.6 Whrs is still pretty efficient use of those precious electrons.........

Yes???????
Yes I agree.
We are only talking about a small volume cooled less than 20C below ambient, but it still a good result.

Those are manufacturers figures under rather unusual circumstances, but I have seen some real world figures (I will post them if can find them again) from this style of fridge and the results are very good, better than might be expected from their reasonably modest insulation thickness.

They also have other advantages, they can be used a fridge or a freezer and can easily be removed for repair, or replaced inexpensively without any "surgery" to the boat. They seem to cope very well with high ambient temperatures, cooling down quickly and freezing when required even in 40C+ temperatures. They are built for a tougher environment than a boat, but don't carry a "marine" price tag.

They do provide a good alternative, or back up, to traditional marine fridge.
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Old 18-05-2013, 06:04   #47
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Noelex,


Thanks for the posts very helpful. If you do run across those real world performance numbers...... It would be great to see them.
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Old 18-05-2013, 10:05   #48
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Re: Engel portable frig.........

Quote:
Originally Posted by w32honu View Post
If I read this correctly.................

12Ahrs or 153.6 Whrs is still pretty efficient use of those precious electrons.........

Yes???????
NO!

I don't think the figures Noelex is using in his example are "real world"
Ambient temp inside the boat will be above 25 C unless its in winter. Fridge temp wanted will be much lower than 7.5 C. Fridge temp should be 4 C or below.

Currently my ambient temp is about 32 C when the hatches are open and 34 C when I am off the boat. It's set about 3 C so the beer is COLD. But when I put beer or water in the fridge its at ambient temp of 32 C.

So not only does the compressor work hard for the ambient air temp drop it also has to cool down water that's bloody hot to begin with!

And when do we dink more cool water? On hot days, of course. So if our water consumption on hot tropical days is 4 x 500 mil drinks, and there's two people on board that's 4 kilograms of water to be cool 30 C per day.

My Dometic does work very very well... Small box size and good compressor and nice digital temp gauge... So I tend to use it a lot, especially when I forget to put in the beer or need to cool something quickly...

In conclusion, take published electricity consumption figures and double them! Then multiply by 6!!!


But when we are talking about ice cold beer the electricity consumed really takes second place

Cheers.
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Old 18-05-2013, 10:06   #49
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Re: Engel portable frig.........

I don't have an Engle but my Waco has worked fine for years both as a freezer and a fridge.
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Old 18-05-2013, 16:40   #50
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So the published performance numbers of 12Amps (seems low to me as well) should be 144Amps....... 12 x 2 x 6 = 144Amps.
That seems a bit high. That's my dilemma , the numbers are all over the map. Might be safe to assume that the Engel MD17 will draw around 25 to 40 Amps depending on the ambient temps and the install (well ventilated or not).

Curious if anyone would agree with that??
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Old 18-05-2013, 17:02   #51
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Re: Engel portable frig.........

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Originally Posted by w32honu View Post
Curious about real world experience with the Engel portable frig. Specifically the MD-17 model. (or any model)
How much average amp draw on a daily basis?

Reliability?
I've been using an Engel for my refrigeration on board for about ten years now.
THE BIANKA LOG BLOG: WHAT WORKS! WHAT'S COOL!
Actually I operate in freezer mode. Never really calculated the amps hours but, my two old 12 volt 75 watt Siemens panels are able to keep up with demand from the Engel and unless I have several days of severe cloud cover or rain. I never have to fire up the Honda 2000 generator for charging. I have in the cabin where it makes a nice extension for the portside bunk and a good seat for doing chart work on the cabin table. I give the Engel a
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Old 19-05-2013, 03:24   #52
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Re: Engel portable frig.........

I still cannot find he good data, but I did find this table.
Its from a magazine test. Its a bit of worry that that they get A and AHrs confused.
Unfortunately I am not sure of the test conditions, but the numbers give some comparison of different models.
These fridges are bigger than we were discussing (the number at the end is generally the size in litres.)
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Old 19-05-2013, 03:41   #53
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Re: Engel portable frig.........

Some more manufactures figures, this time from Trailblazer which are amongst the best (apparently independently verified by a university)

No details of the test conditions, but I strongly suspect there was no opening of the fridge, or adding warm goods, so the real results will be higher (50%?)

The fridges come with 75mm, or 125mm of insulation, hence the two numbers.
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Old 24-05-2013, 12:29   #54
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Quote:
Originally Posted by noelex 77 View Post
Some more manufactures figures, this time from Trailblazer which are amongst the best (apparently independently verified by a university)

No details of the test conditions, but I strongly suspect there was no opening of the fridge, or adding warm goods, so the real results will be higher (50%?)

The fridges come with 75mm, or 125mm of insulation, hence the two numbers.
Noelex,

Thanks...... That's a big help.

Thumbs up!!!!!

S
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Old 29-05-2013, 07:30   #55
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Re: Engel portable frig.........

Decided on the Engel MD-17.

It will fit into a locker as a drop in with just the top 4 inches exposed on top. A bit of Cherry trim around the edges will give it a nice finished look. Should not have to much difficulty ventilating the cabinet.........

Its gonna be a long while....... but will try to post some real world demand as I get them.

Thanks for the posts......

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Old 29-05-2013, 07:42   #56
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Re: Engel portable frig.........

Good luck with it
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