Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-08-2010, 22:36   #1
Registered User
 
Yachts66's Avatar

Join Date: Sep 2005
Location: In the Jungle, on an Island near the beach
Boat: Roberts 45 Mariah's Child
Posts: 654
Images: 15
Freezer / Refrigerator Question . . .

By happenstance I discovered my 5 cu ft chest freezer only uses 1.3 amps (110v). Not much at all. That got me thinking, what if I added a few inches of blue board around it and installed it on the boat? I can get a brand new unit at Costco or Best Buy for about $200. They seem to be very energy efficient and certainly aren't drawing that many watts. So, why wouldn't this be a less cost alternative the the traditional marine refrigeration systems you see at the boat shows? Ok, yes it would draw power and since it's 110v you'd have to run it off the inverter, but so what? Not a huge number of amps. One could also install a fan blowing on the condenser for those hot days in the tropics. It might not be as efficient as the true marine unit, but it would also be a fraction of the cost. Do you think this would work? Ditto a small refrigerator.

Regards,

Thomas
__________________

__________________
We don't stop playing because we grow old, we grow old because we stop playing! Ben Franklin
Yachts66 is offline   Reply With Quote
Old 07-08-2010, 22:47   #2
Registered User

Join Date: May 2007
Location: Isle des Saintes, Guadeloupe
Boat: Voyage 38 Catamaran
Posts: 165
Convert your 1.3 amps at 110 volts AC to 12 volts DC you are now looking at about 13 amps. Then you have to throw in the 10 to 20 % ineffiecncy of an inverter. That will put it above 15 amps. I think I wll stick to my traditional Cold Machine that draws just over 4 amps.
__________________

__________________
Billyehh
billyehh is offline   Reply With Quote
Old 07-08-2010, 22:58   #3
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Sail or power boat?

My question would be: how much of a heeling angle would a residential reffer take?

And, that's almost 12 amps @ 12V, if your running off of an inverter it would be more. I would hope you would have very large batteries or a genset.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 07-08-2010, 23:01   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Apr 2008
Posts: 769
If you have an existing ice-box, it's usually best to add as much insulation as you can reasonably fit, and install an ice-box conversion kit (~$600). If you're able to also add ice occaisionally, the current draw will be suprisingly low.
__________________
anotherT34C is offline   Reply With Quote
Old 08-08-2010, 01:22   #5
********* Emeritus
 
SaucySailoress's Avatar

Cruisers Forum Supporter

Join Date: Apr 2010
Posts: 8,236
Now, I'm only a girl, so don't quote me on this, but....

We bought a little household fridge. Hubby ripped out the insides, stuck them in the galley and built a very big, well insulated and drained fridge with a small freezer next it. Both work very well, our dive boat captains use them to freeze water bottles and cool slabs of softies for the dive boats!!!

It works for us - we run it off mains at the marina, but it also runs from the solar generator whilst at sea. And if all that fails, we have room for huge ice blocks at the bottom, with more space left over and better insulation than the previous 'fridge' had.

Good luck - and let us know what you decide.
__________________

SaucySailoress is offline   Reply With Quote
Old 08-08-2010, 10:04   #6
Senior Cruiser

Cruisers Forum Supporter

Join Date: Apr 2008
Posts: 769
Did your husband convert the hardware to run off of 12 volts? I'm guessing you guys aren't running the thing off of an inverter.

Maybe a small 12 volt rv-fridge would be good for a project like that?
__________________
anotherT34C is offline   Reply With Quote
Old 08-08-2010, 12:26   #7
Registered User
 
Yachts66's Avatar

Join Date: Sep 2005
Location: In the Jungle, on an Island near the beach
Boat: Roberts 45 Mariah's Child
Posts: 654
Images: 15
I think this has turned out to be one of my late night great ideas that upon inspection in the morning, turned out to be not such a good idea after all. As I will spend little time at the dock, I have to rely upon the power my solar cells generate, my wind generator generates and when all else fails my gen set generates. I forgot about the additional math needed to go from 12V to 110V and added inefficiency of the inverter. So, when I add all that up I think I'm probably better off in the long run just building a proper box and using a Danfoss 80. It was a fun thought while it lasted though!

Regards,

Thomas
__________________
We don't stop playing because we grow old, we grow old because we stop playing! Ben Franklin
Yachts66 is offline   Reply With Quote
Old 09-08-2010, 07:12   #8
Registered User

Join Date: May 2007
Location: Isle des Saintes, Guadeloupe
Boat: Voyage 38 Catamaran
Posts: 165
Yeah: The same thing happens to me, Usually after some rum punch. Best of luck on your project.
__________________
Billyehh
billyehh is offline   Reply With Quote
Old 09-08-2010, 07:17   #9
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Quote:
Originally Posted by billyehh View Post
Convert your 1.3 amps at 110 volts AC to 12 volts DC you are now looking at about 13 amps. Then you have to throw in the 10 to 20 % ineffiecncy of an inverter. That will put it above 15 amps. I think I wll stick to my traditional Cold Machine that draws just over 4 amps.
That's it in a nutshell and that's why even the most inexpensive production boats use "marine" 12/120 volt refrigerator/freezers.

I'll just add to the above that the inverter will have to run 24/7, it will not shut down when the thermostat is not calling for cooling like the compressor does.
__________________
rwidman is offline   Reply With Quote
Old 09-08-2010, 07:19   #10
cruiser

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Quote:
Originally Posted by Yachts66 View Post
I think this has turned out to be one of my late night great ideas that upon inspection in the morning, turned out to be not such a good idea after all. As I will spend little time at the dock, I have to rely upon the power my solar cells generate, my wind generator generates and when all else fails my gen set generates. I forgot about the additional math needed to go from 12V to 110V and added inefficiency of the inverter. So, when I add all that up I think I'm probably better off in the long run just building a proper box and using a Danfoss 80. It was a fun thought while it lasted though!

Regards,

Thomas
Good choice.
__________________
rwidman is offline   Reply With Quote
Old 09-08-2010, 09:29   #11
Registered User
 
Yachts66's Avatar

Join Date: Sep 2005
Location: In the Jungle, on an Island near the beach
Boat: Roberts 45 Mariah's Child
Posts: 654
Images: 15
Out of curiosity, now that R Parts has bitten the dust, who do folks use for their refer parts and such? Is there a central source like them now?

Thanks,

Thomas
__________________
We don't stop playing because we grow old, we grow old because we stop playing! Ben Franklin
Yachts66 is offline   Reply With Quote
Old 09-08-2010, 10:00   #12
Registered User
 
janice142's Avatar

Join Date: May 2006
Location: west coast of Florida
Boat: Schucker mini-trawler
Posts: 331
Send a message via AIM to janice142 Send a message via MSN to janice142 Send a message via Yahoo to janice142 Send a message via Skype™ to janice142
HOWEVER, yes, your A/C reefer may take 13 amps to run, but unless it's one of those "nucool" or "thermoelectric" refrigerators that are being sold now, yours does not run anywhere near 24/7 - thus your power consumption will be much less.

The solution for me is a cheap small cube... it's plugged into an outlet 24/7 along with a small fan blowing on the coils. Upstream is an on/off switch. I shut off the unit at night -- without opening the door. My ice cubes do melt around the edges but do not liquify overnight. Yes, the area is insulated (3 layers of blue board) ... and no, it's not perfect, but at $600 plus for a small d/c one, versus less than $100 from Walmart, it's a-okay for me.
__________________
janice142 is offline   Reply With Quote
Old 09-08-2010, 10:12   #13
Registered User
 
Yachts66's Avatar

Join Date: Sep 2005
Location: In the Jungle, on an Island near the beach
Boat: Roberts 45 Mariah's Child
Posts: 654
Images: 15
How thick is the blue board you are using?

Thanks,

Thomas
__________________
We don't stop playing because we grow old, we grow old because we stop playing! Ben Franklin
Yachts66 is offline   Reply With Quote
Old 09-08-2010, 15:13   #14
Registered User
 
janice142's Avatar

Join Date: May 2006
Location: west coast of Florida
Boat: Schucker mini-trawler
Posts: 331
Send a message via AIM to janice142 Send a message via MSN to janice142 Send a message via Yahoo to janice142 Send a message via Skype™ to janice142
Yacht66... I used the 3/4" blue board (2 to 3 layers) marked R4 styrofoam. It's neat and easy to cut (score/snap). At the stripe on my hull I added an extra layer (outbound) that was "evened up" somewhat by the following layers. That blue part is/was significantly warmer so I've added the R4 (single layer) to the hull in my food storage areas.

The styrofoam made a huge difference. I'm dealing with south GA and in 90-plus degree ambient temperatures I was not able to keep icecream cold with the unit sitting out (pre install) -- now I am enjoying icecubes in my soda. I was surprised the difference the styrofoam made.

Good luck to you. Specifically, I bought the smallest Haier (1.7 cubic feet) but if I'd have more space I might have gone with the next size up.
__________________
janice142 is offline   Reply With Quote
Old 09-08-2010, 17:11   #15
Registered User

Join Date: Jan 2010
Location: Wells, Vt
Boat: 42ft Colvin Gazelle - TLA HLA
Posts: 504
I'm sure I will get set straight here but I have always wondered about the "elecrolux" fridges that run on propane or diesel/kerosine. The ones that are commonly in R/Vs and off grid houses otr camps. I thought that perhaps heeling would upset the process but just the other day talked to a cruiser who used a propane version for twenty years without a hitch while mostly living aboard and cruising. He said it was used a 5lb bottle a month. Why aren't they more common in boats? They aren't cheap to buy but overall it sounds pretty good.
__________________

__________________
ConradG is offline   Reply With Quote
Reply

Tags
freezer, refrigerator

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mahe 36: Refrigerator and Freezer Cotemar Fountaine Pajot 32 06-07-2017 07:45
Refrigerator and Freezer Paint Tspringer Construction, Maintenance & Refit 11 21-01-2010 21:40
Waeco Refrigerator / Freezer marc2012 Provisioning: Food & Drink 16 21-01-2010 17:39
For Sale: New Norcold 120vac/12vdc Refrigerator / Freezer - Seattle Area Cheechako Classifieds Archive 0 22-09-2009 16:14
Converting Ice Box to Freezer/Refrigerator JohnnyC Plumbing Systems and Fixtures 6 01-11-2007 08:39



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:46.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.