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18-06-2021, 06:06
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#1
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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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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20-06-2021, 17:36
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#2
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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Re: Refrigerator Insulation at engine
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20-06-2021, 18:31
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#3
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Registered User
Join Date: May 2010
Location: Sydney Australia
Boat: Fisher pilothouse sloop 32'
Posts: 3,416
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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?
__________________
Rob aka Uncle Bob Sydney Australia.
Life is 10% the cards you are dealt, 90% how you play em
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21-06-2021, 03:58
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#4
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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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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21-06-2021, 16:28
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#5
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Registered User
Join Date: May 2010
Location: Sydney Australia
Boat: Fisher pilothouse sloop 32'
Posts: 3,416
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Re: Refrigerator Insulation at engine
Quote:
Originally Posted by rgleason
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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Hey, you could look at rockwool for the insulation as well, here one can buy compressed sheets used in the hvac industry.
__________________
Rob aka Uncle Bob Sydney Australia.
Life is 10% the cards you are dealt, 90% how you play em
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22-06-2021, 05:27
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#6
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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Re: Refrigerator Insulation at engine
Yes. I occurs to me SS might make engine noisier.
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24-06-2021, 08:53
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#7
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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Re: Refrigerator Insulation at engine
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26-06-2021, 14:03
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#8
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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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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26-06-2021, 14:16
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#9
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Registered User
Join Date: Jun 2018
Location: stuck in Florida for vaccinations, bot stuck in the Chesapeake
Boat: Vanguard 33
Posts: 103
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Re: Refrigerator Insulation at engine
Slightly off topic but, do Vacuum Panels leak over time?
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26-06-2021, 17:43
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#10
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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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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26-06-2021, 17:54
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#11
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Registered User
Join Date: Oct 2017
Location: Newbies: Arkansas River>Caribbean>Maine?
Boat: 1983 Catalina 30 5411 STD Rig
Posts: 123
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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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26-06-2021, 18:50
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#12
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Registered User
Join Date: Nov 2006
Location: Back in Northern California working on the Ranch
Boat: Pearson 365 Sloop and 9' Fatty Knees.
Posts: 10,466
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Re: Refrigerator Insulation at engine
Quote:
Originally Posted by rgleason
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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.
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming: Wow - what a ride!"
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27-06-2021, 03:54
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#13
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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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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27-06-2021, 04:33
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#14
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Registered User
Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 17,526
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Re: Refrigerator Insulation at engine
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