Refrigeration Conversion Help - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 10-11-2012
Sailing Chance
 
Join Date: Aug 2012
Posts: 47
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
SailingChance is on a distinguished road
Refrigeration Conversion Help

I will be cruising in the Caribbean for the next year or so and am building a new Freezer box for my 34' Seafarer (didnt have one before).

I was back and forth between a Frig-o-boat compressor/evaporator system and an Adler Barbour system - both run on 12v DC current. Both systems costs about $1500 + insulation, etc. This will be a Small Freezer only - about 3.5 Cubic Feet.

During my research I came across this :
EdgeStar 80 Quart 12 Volt DC Portable Fridge/Freezer - FP861

I found it online for about $600 all-in. My thinking is that I can remove the outer shell and build up the insulation to make it more efficient for the higher temps of the Caribbean. All for about $800 instead of close to $2000 with the other systems. It only pulls 80W! of power or, 5.7 amps DC - same as the Adler Barbour. Am I crazy or does this sound like the way to go...?

All my electronics are supported by 300W of Solar and a 400w wind turbine. I also have a genset. The Freezer will definitely be the largest power draw, but this seems like a no brainer to me. What am I missing?
Reply With Quote Share with Facebook
  #2  
Old 10-11-2012
Brewgyver's Avatar
Senior Member
 
Join Date: Dec 2011
Location: So Cal
Posts: 337
Thanks: 3
Thanked 9 Times in 9 Posts
Rep Power: 3
Brewgyver is on a distinguished road
Re: Refrigeration Conversion Help

I guess that's doable, have you done anything like this before?

Also, you must be aware that the 5.7 amp rating is likely RLA, and that on startup the compressor WILL draw much more than that. A good rule of thum is near triple the run current. Granted, that spike typically lasts only a second or two at most, but the power supply MUST be able to handle it. Adding a hard start kit or booster capacitor can help a lot.

Good luck!
__________________
s/v My Sweet Girl!
Catalina 30 (Mark I)
Atomic 4
Reply With Quote Share with Facebook
  #3  
Old 10-11-2012
SchockT's Avatar
Senior Member
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 1,384
Thanks: 0
Thanked 23 Times in 22 Posts
Rep Power: 3
SchockT is on a distinguished road
Re: Refrigeration Conversion Help

So you are thinking of building that unit into the cabinetry in your boat? If you are going to box it in you will need to make sure that the compressor section still gets good ventilation. You also want to make sure that you can access the compressor easily for service and maintenance.

Beware of manufacturer specs when it comes to compressor amp draws. Compressor draw varies depending on box temperature and ambient temperature. If they quote a really low amp draw, then it is likely measured in optimum conditions with a cold box. You can expect real world draws to be higher, especially if the condenser is located in a hot cabin with poor ventilation.

Having said that, it wouldn't surprise me if they used the same compressor as the AB and Frigo do!

The advantage to the kits is that they allow you to locate the condensing unit in a cool well ventilated area of your choosing.

BTW Brewgyver, Capacitors and hard start kits only apply to AC motors not DC.
__________________
1979 Santana 30 Tall Rig
Hull#101
Reply With Quote Share with Facebook
  #4  
Old 10-18-2012
floridajaxsailor's Avatar
Senior Member
 
Join Date: Aug 2010
Location: Ft Myers, FL
Posts: 190
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
floridajaxsailor is on a distinguished road
Re: Refrigeration Conversion Help

I am also looking to convert
I have a rather large cabinet that I can do an ice box conversion
or am open to buying a fridge such as below

here is a Norcold unit for 663
am I missing something, does this include the compressor & tubing & all?
I am assuming that one limits their space if they go this route?

any other unit ideas are much welcomed
I would like to stay near 1000

gracias!
Reply With Quote Share with Facebook
  #5  
Old 10-18-2012
Captainmeme's Avatar
Senior Member
 
Join Date: Aug 2008
Location: East Tennessee
Posts: 718
Thanks: 4
Thanked 13 Times in 12 Posts
Rep Power: 6
Captainmeme is on a distinguished road
Re: Refrigeration Conversion Help

Have you consider vacuum insulated panels for insulation?
Reply With Quote Share with Facebook
  #6  
Old 10-19-2012
exkma367's Avatar
Junior Member
 
Join Date: Oct 2008
Location: Martinsburg, PA
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
exkma367 is on a distinguished road
Re: Refrigeration Conversion Help

Here is what we did, right or wrong, it worked for us.

I used two inches of foam board and spray foam to beef up the insulation in our icebox. The first year out, I took apart a dorm sized refrigerator without breaking the system. I curled the condenser into a "U" shape. The evaporator went down into the box and the condenser and compressor went behind and on top of the icebox. I boxed the compressor/condenser in, with 3" holes at each end of the box. I installed 12 volt fans, like the ones used to cool desktop computers, inside the box at the holes. I purchased a Johnson controls refrigeration thermostat to run compressor and fans. I wired it up to my inverter. It worked fine, but pulled more amps than my 85 watt solar panel and Aqua Air wind generator could put back in our batteries. The Honda generator had to be run way to much, about an hour each night.

The next year I got my hands on a used Danfoss BD35 12v compressor. I removed the 134 from the system, cut out the 120v compressor and soldered in the Danfoss, and put the gas back in. The Honda gets run much less now. We used it as a refrigerator but it would work as a freezer also by turning down the thermostat.

We sailed on a tight budget, and nothing on the boat had a factory warranty, but we sailed.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Refrigeration conversion j34035 Gear & Maintenance 10 07-18-2010 09:47 PM
Adler barbour refrigeration conversion j34035 Gear & Maintenance 3 08-04-2009 01:45 PM
Refrigeration conversion Mahia Newport 5 11-15-2007 05:13 PM
Refrigeration Conversion Mysun Gear & Maintenance 11 12-04-2006 02:41 PM
Cal 27 Pop Top Conversion DonaldAdams General Discussion (sailing related) 2 07-10-2006 11:24 PM


All times are GMT -4. The time now is 01:52 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.