Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-12-2012, 08:33   #16
CFR
Registered User

Join Date: Jun 2009
Posts: 140
Re: I don't need a freezer !

Hi i started a long thread here about living without a fridge and that becomes a long discussion. I am happy you think the same way. We are not real veggies now but i assume we will check this style when moving to the boat necxt year.
__________________

__________________
CFR is offline   Reply With Quote
Old 22-12-2012, 07:40   #17
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,737
Re: I don't need a freezer !

Quote:
Originally Posted by Panope View Post
Adding to the above post:

Another reason having a full fridge (no air) may reduce power consumption is that it reduces the amount of cold air that spills out of the space when the door is opened. This is probably a big factor when dealing with a front loading fridge design, and a small factor when dealing with a top loading design as the cold air tends to stay inside via gravity (cold air heavy).

Steve
Actually, there is very, very little heat, astonishingly little heat in the amount of room temperature air which would be needed to replace 25 liters of air which might spill out of a fridge like Mark's. The specific heat of air is about 1kJ per kg per degree K, less than 1/4 the specific heat of water. And one liter of air at 15 degrees and at normal atmospheric pressure has a mass of only 1225 grams per cubic meter, or 1.225 grams per liter, nearly 1000 times less the mass of a liter of water.

So as a result of all that, 25 liters of air at a given temperature has less heat in it than 7 milliliters of water at the same temperature. To put it another way -- if you put one single warm Coke in your fridge, you have put more heat into it than if you spilled all the air out of it 43 times.

Net net -- don't worry about displacing the air in your fridge, and don't worry about the air spilling out of it.

The big advantage of top loading fridges is that if the door gasket is not perfect, then there will be less exchange of air with the cabin by convection. But a front loading fridge with a perfect gasket will be hardly less efficient than a top loading fridge with a perfect gasket.
__________________

__________________
Dockhead is offline   Reply With Quote
Old 22-12-2012, 08:23   #18
Don't ask if you can't handle it
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 12,308
Re: I Don't Need a Freezer!

Interesting that we asa group here have changed our views about the empty air. years ago all you would read is how that air was causing lost cooling and people would talk about putting empty bottles in the box to help this. Now it seems we don't feel the air really matters.

Maybe a sign that we have more engineers etc here who know basic heat transfer.
__________________

__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Reply

Tags
freezer

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
Lipari 41: Refrigerator & Freezer aclmck Fountaine Pajot 6 14-05-2017 05:13
Frigoboat Freezer Problem Marg Plumbing Systems and Fixtures 14 01-11-2012 13:31
Separate Fridge and Freezer - Thoughts ? SV Demeter Plumbing Systems and Fixtures 22 14-07-2012 05:31
For Sale: Indel Isotherm Freezer Box - Compressor / Strainer 1.87cf Air Cooled $700 Conchfritterz Classifieds Archive 3 13-01-2012 22:02
Rebuilding Fridge / Freezer - Materials ? From Where ? CharlieCobra Construction, Maintenance & Refit 10 17-06-2009 20:14



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:07.


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.