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  #1  
Old 02-04-2014
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Ice Box Rebuild

1972 Irwin 28 have read alot that the factory icebox is pretty much useless and mine dosent even have a drain. Just wondering if others have rebuilt their ice box what did you do to improve it. Im not upgrading to a cooling system going to keep it ice cooled.
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Old 02-04-2014
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Re: Ice Box Rebuild

If you have access to exterior, add as much insulation as is room
for. I did not have exterior room so I added insulation to interior
using Owens Corning pink foam. Use as thick as you see fit to
lose inside volume. Important to seal along edges and I made a
2" foam lid inside cooler (hinged to fit inside narrower cover of
icebox.) World of difference. I also make my own block ice,
much longer lasting than cubes. Some blocks are made inside
half or full gallon containers which are used for nice cool drinking water when thawed. Really should have drain as well prefably not
draining into bilge.
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Old 02-06-2014
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Re: Ice Box Rebuild

Thea,

If it's available, look for nanogel or aerogel to insulate. R7/inch and you pour it in. I'm planning on doing the same but timing is everything.
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Old 02-06-2014
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Re: Ice Box Rebuild

Quote:
Originally Posted by DonScribner View Post
Thea,

If it's available, look for nanogel or aerogel to insulate. R7/inch and you pour it in. I'm planning on doing the same but timing is everything.
Good suggestion on the Cryogel/Aerogel. I think I heard that 2" of the stuff is equal to 12" of foam insulation.

I bough some sheets off eBay. Was not too expensive.

Regards,
Brad
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Old 02-07-2014
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Re: Ice Box Rebuild

Pour it in I have only seen sheets?

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Re: Ice Box Rebuild

ASPEN AEROGELS | Industrial Insulation for Cold Work
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Old 02-07-2014
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Re: Ice Box Rebuild

We use Aerogel in . . . granule . . . form to fill cellular polycarbonate sheet. This gives a 1" poly sheet 60% light transmission with the same R-factor as a 2X4 insulated wall. The Aerogel is like frozen smoke. A tablespoon of the stuff in your hand looks like you are literally holding thin smoke and weighs almost nothing. The chunks are about the size of rock salt. It is hydrophobic so it wont hold any water. I plan on building my icebox out of fiberlgass on a plexiglass mold (for smoothness) then set it in place and carefully pour the "gel" around it. I may need to drill entry ports to do this. Then, I'll replace the top of that part of the galley with Formica, or something like it. That will cover any ports I had to drill. Best laid plans anyway.
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Re: Ice Box Rebuild

Do you have any links

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Old 02-08-2014
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Re: Ice Box Rebuild

Nigel Calder was talking a bit about the relationship between refrigeration and energy conservation in the lecture I attended a few weeks ago. He really knows his stuff and has a few books that talk about different setups for different applications.

One in particular explores the science, math and application behind it. I think its called Refrigeration for Pleasure Boats.
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Old 02-08-2014
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Re: Ice Box Rebuild

DonScribner,

as I understand, Aerogel is fairly hydrophilic. Given that you're 'pouring it in' to spaces, do you have to do some sort of vapor-barrier to account for that? I thought the deal with the 'sheets' is that they can't be perforated for that reason
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