Refrigeration - Old v New - SailNet Community
 1Likes
  • 1 Post By deniseO30
 
LinkBack Thread Tools
post #1 of 10 Old 06-15-2011 Thread Starter
Senior Member
 
Join Date: Aug 2008
Location: Pittsburgh, PA
Posts: 198
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
 
Refrigeration - Old v New

Our Catalina 30 has an Adler Barbour 12 volt refrigeration unit that is somewhere between 20 and 30 years old. It still gets cold enough to freeze Lucifer’s toes, but it takes a long time to do so, and consumes a significant amount of electricity in the process. My question is: Has experience proven newer 12 volt refrigeration units to be significantly more efficient than our dinosaur? Can anyone share the results of replacing an older unit with a newer one? Thanks! – Ray ‘n’ Cyn

Are we there yet?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
rayncyn51 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 10 Old 06-15-2011
Senior Member
 
JimsCAL's Avatar
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,809
Thanks: 2
Thanked 71 Times in 66 Posts
Rep Power: 9
 
Don't have any hard data, but I suspect the new units are more efficient than the old ones, just like new home refrigeators are more efficient than the older ones. Main reason for this is the new scroll compressors are more efficient than the old reciprocating ones. That said, as long as yours is working well, I wouldn't upgrade. Doubt any savings would make up the cost in your lifetime.
JimsCAL is offline  
Quote Quick Reply Share with Facebook
post #3 of 10 Old 06-15-2011
Freedom 39
 
FarCry's Avatar
 
Join Date: Apr 2007
Location: St Thomas USVI
Posts: 1,050
Thanks: 0
Thanked 29 Times in 27 Posts
Rep Power: 9
 
Agree with Jims comments and would add that, IMHO, adding insulation and getting an airtight seal around the door goes a long way towards efficiency. I spent a little money and a lot of time adding a couple of inches of closed cell foam insualtion around the box and a double gasket (from Home Depot designed for sealing exterior doors) to the lid on my fridge and immediately saw a large decrease in Ah consumed.
FarCry is offline  
Quote Quick Reply Share with Facebook
post #4 of 10 Old 06-15-2011
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,501
Thanks: 0
Thanked 96 Times in 87 Posts
Rep Power: 8
   
Possible after all this time your refrigerant level is low as well.

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
post #5 of 10 Old 06-15-2011
Reward for lost Kraken!
 
hellosailor's Avatar
 
Join Date: Apr 2006
Posts: 11,491
Thanks: 5
Thanked 132 Times in 129 Posts
Rep Power: 11
   
30 years old and the refrigerant may be low.

A fast test is to find the amperage rating on the compressor's rating plate. Then use an ammeter to measure the draw ehn the compressor is running.

If it is rated for a 3 draw but you find it is pulling 5A...that's a sure sign it need gas. Doens't mean it is leaking badly enough to need repairs, just that there's been a slow leak, which is worth looking into, or just a recharge.

Of course a new system may be faster and cheaper, considering how hard it is to find a good cooling tech.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #6 of 10 Old 06-15-2011
me at 67!
 
deniseO30's Avatar
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,925
Thanks: 55
Thanked 125 Times in 114 Posts
Rep Power: 10
   
Actually your old unit is still very efficient. Danfoss makes one amazing little compressor. At 600 + dollars for a new condenser, the cost vs reliability is something to think about for sure. If the box still cools down to 38 or so and evaporator gets cold all over it's surface your refrigerant is most likely still ok. in Theory, the refrigerant should not leak out. (think of Grand Ma's old Philco or GE still running after 50 plus years) Murphy's law, will insure it will break down when you need it most and the worst possible time. Ice is still cheap however.
Glacroix likes this.

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My last project!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


My boat is sold!
deniseO30 is offline  
Quote Quick Reply Share with Facebook
post #7 of 10 Old 06-15-2011
Old Fart
 
DwayneSpeer's Avatar
 
Join Date: Oct 2003
Location: Pasco, WA, USA
Posts: 514
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
 
Replaced mine

I replaced my old Danfoss three years ago after it finally failed. The only significant improvement is the fan is now shrouded so it "should" be more efficient and the new one has a connection for an auxiliary fan which I installed to ventilate the compartment it's installed in. The aux fan comes on when the compressor kicks in. One thing to note is the new ones use R23 which is a bit less efficient than the older R12. I haven't noticed any large improvement in overall efficiency over my old unit.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Hey, can one of you guys pass me a crab?


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
DwayneSpeer is offline  
Quote Quick Reply Share with Facebook
post #8 of 10 Old 06-16-2011 Thread Starter
Senior Member
 
Join Date: Aug 2008
Location: Pittsburgh, PA
Posts: 198
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
 
Thanks to all for your replies and great information. I will have to do some further investigation next time I am aboard. My feeble recall tells me that the evaporator, which is also a small freezer compartment, ices up on only one end. I will have to verify that but if that’s so, perhaps a Freon check is in order.

Should I decide to service the unit, can anyone recommend a qualified AB service technician in the Kent Island / Annapolis area?

Thanks again for your great feedback! – Ray

Are we there yet?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
rayncyn51 is offline  
Quote Quick Reply Share with Facebook
post #9 of 10 Old 06-16-2011
Senior Member
 
night0wl's Avatar
 
Join Date: Mar 2006
Location: Fort Lauderdale
Posts: 1,459
Thanks: 0
Thanked 21 Times in 21 Posts
Rep Power: 10
 
BTW - for those looking at $600 compressors alone...I've always wondered why not get one of those Waeco CF-80's that can be had for $400 or so online and then just rip out the BD-35 compressor thats in there. Same compressor thats standalone?

Pricing of marine gear just never makes sense to me.

P.S. - I find that "precooling" your fridge with some frozen ice packs or really cold cans of soda helps bring it down to temp really easily...then the fridge works less to maintain temp.

S/V Jendai
Beneteau 343
night0wl is offline  
Quote Quick Reply Share with Facebook
post #10 of 10 Old 06-16-2011
me at 67!
 
deniseO30's Avatar
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,925
Thanks: 55
Thanked 125 Times in 114 Posts
Rep Power: 10
   
There's3 or 4 models of the same compressor nightowl And a few modules also. fixed speed, variable, 12 volt, 12/48 volt Direct Current Compressors - Danfoss btw it always makes sense to replace a whole condensing unit rather then a compressor alone.

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My last project!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


My boat is sold!

Last edited by deniseO30; 06-16-2011 at 01:52 PM.
deniseO30 is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
refrigeration egregerson Ericson 5 02-28-2013 08:31 AM
refrigeration tburton Gear & Maintenance 18 12-18-2010 05:06 PM
Refrigeration recycle Gear & Maintenance 22 05-13-2008 10:09 PM
REFRIGERATION JimMuro Provisioning 10 07-03-2006 12:28 AM
refrigeration hathanger Gear & Maintenance 19 04-08-2005 05:21 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome