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Old 18-06-2021, 06:06   #1
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Refrigerator Insulation at engine

One big drawback to having the refrigerator and galley aft by the companionway is the chest ends up sharing a plywood partition with the engine compartment.

What are the easiest and best ways to prevent heat flow to the chest through this area?

Assume there is only 1/2" -1" available on the engine side.

Solving this problem will have long term benefits to the refrigerator system.

Some ideas:
1. Run a fan exhausting engine heat during operation and for 30-45 minutes.
2. What insulation on the ref side? - Would a glacier bay insulated panel be advisable?
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Old 20-06-2021, 17:36   #2
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Re: Refrigerator Insulation at engine

Use of aerogel


https://www.cruisersforum.com/forums...el-184708.html
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Old 20-06-2021, 18:31   #3
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Re: Refrigerator Insulation at engine

Hi, would a layer of the best thin insulation that you can find glued to the ply wood and then a sheet of really reflective stainless sheet screwed over the top of it with small standoff spacers to prevent compressing the insulation work to reduce the heat transfer?
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Old 21-06-2021, 03:58   #4
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Re: Refrigerator Insulation at engine

Uncle Bob

I think if the SS was polished it would qualify as relective, and coupled with two-three layers of 1/4" aerogel encapsulated in fiberglass coating to prevent the aerogel from it shedding all over the boat, it would really help the whole system.

I could even leave an opening for the alternator bracket which is close to that partition.
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Old 21-06-2021, 16:28   #5
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Re: Refrigerator Insulation at engine

Quote:
Originally Posted by rgleason View Post
Uncle Bob

I think if the SS was polished it would qualify as relective, and coupled with two-three layers of 1/4" aerogel encapsulated in fiberglass coating to prevent the aerogel from it shedding all over the boat, it would really help the whole system.

I could even leave an opening for the alternator bracket which is close to that partition.
Hey, you could look at rockwool for the insulation as well, here one can buy compressed sheets used in the hvac industry.
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Old 22-06-2021, 05:27   #6
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Re: Refrigerator Insulation at engine

Yes. I occurs to me SS might make engine noisier.
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Old 24-06-2021, 08:53   #7
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Re: Refrigerator Insulation at engine

R-50 from a commercial source, would be ideal against engine - refridge partition but no custom sizes.

https://www.r-50.com/

Also same deal no custom sizing
https://www.kingspan.com/us/en-us/pr...boards/optim-r




Maybe

http://ezkold.com/products/vacuum_in..._panels_-_vips
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Old 26-06-2021, 14:03   #8
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Re: Refrigerator Insulation at engine

Louie suggested I contact Rich Boren, Owner/Cruiser, Cruise RO Water and Technautics, about about the use of vacuum panels for a rebuild top access fridge. I am considering use of aerosol.

Rick advised that, "we use Glacier Corporation in Orange County, California to make VIP when we need them."

https://www.glaciercorp.com/index.html

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Old 26-06-2021, 14:16   #9
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Re: Refrigerator Insulation at engine

Slightly off topic but, do Vacuum Panels leak over time?
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Old 26-06-2021, 17:43   #10
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Re: Refrigerator Insulation at engine

If punctured, you've lost the insulation. Yes they could gradually leak. I don't know if they have done tests. I think aerogel would be better but it gets all over the place, so best to keep it off the boat, cut the pieces outdoors with a mask and encapsulate with several coats of epoxy and then take it to the boat.
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Old 26-06-2021, 17:54   #11
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Re: Refrigerator Insulation at engine

Face whatever you use in aluminum foil to reflect the radiant heat.

"The surface of aluminum has the ability not to absorb, but to reflect 95% of the infrared rays which strike it. Since aluminum foil has such a low mass to air ratio, very little conduction can take place, particularly when only 5% of the rays are absorbed."
How Radiant Barrier Works: Heat Gain/ Loss in Buildings - Radiant Barrier
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Old 26-06-2021, 18:50   #12
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Re: Refrigerator Insulation at engine

Quote:
Originally Posted by rgleason View Post

Ditto on aerogel. Read up on iut. It is quite amazing. I woulk add a thin sheet of stainless steel to the bulkhead before the aerogel.
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Old 27-06-2021, 03:54   #13
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Re: Refrigerator Insulation at engine

Thanks for reminding me of this. Several layers of this with some space between would help. Perhaps it is the best top surface because it won't increase the noise too much.

Super R® Plus Heavy Duty - Radiant Barrier
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Old 27-06-2021, 04:33   #14
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Re: Refrigerator Insulation at engine

Actually since aerogel is mostly expensive air, inter layering the reflective membrane would help.


Here are some other links for aerogel and insulation
Search "aerogel" https://www.cruisersforum.com/forums...rchid=34090741

https://www.cruisersforum.com/forums...-a-247594.html

https://www.cruisersforum.com/forums...ox-247990.html

https://www.cruisersforum.com/forums...ft-220879.html

https://www.cruisersforum.com/forums...rt-226746.html

These are generally larger projects than mine.
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