Go Back   Bream Master Forums > General Bream Forums > Bream Anglers Tavern

Bream Anglers Tavern Drop in here if you're just surfing with a beer in your hand. Good place to just hang out...



Reply
 
Thread Tools Rate Thread Display Modes
  #1  
Old 26-07-2019, 10:36 PM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Turn your esky into a super esky

Reply With Quote
  #2  
Old 26-07-2019, 10:48 PM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
If you can be stuffed watching it - putting your cheap esky in a big box and surrounding it with explanding foam doubles the life of your ice.

Last edited by yellow door 1; 27-07-2019 at 01:12 AM.
Reply With Quote
  #3  
Old 26-07-2019, 11:10 PM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Also bought myself an infrared thermometer - so I can finally check if salt water ice lasts longer and if its colder.

about 3.5 percent of the weight of seawater comes from the dissolved salts. - but I'm going to try a bit saltier
Attached Images
File Type: jpg 447.jpg (205.2 KB, 0 views)
File Type: jpg 446.jpg (175.9 KB, 0 views)

Last edited by yellow door 1; 26-07-2019 at 11:13 PM.
Reply With Quote
  #4  
Old 26-07-2019, 11:29 PM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Pro tip - if you are trying to mix pool salt into water - dont just pour it into a bottle and shake - it was taking ages to dissolve.
Attached Images
File Type: jpg 445.jpg (113.9 KB, 0 views)
File Type: jpg 442.jpg (192.9 KB, 0 views)
Reply With Quote
  #5  
Old 26-07-2019, 11:30 PM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
and so it begins..........

p.s. yes I did notice the water levels were uneven - this has been corrected
Attached Images
File Type: jpg 444.jpg (131.0 KB, 1 views)

Last edited by yellow door 1; 26-07-2019 at 11:34 PM.
Reply With Quote
  #6  
Old 27-07-2019, 01:07 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Well its been 90mins and the saltwater is cooling down quicker

Last edited by yellow door 1; 28-07-2019 at 03:09 AM.
Reply With Quote
  #7  
Old 27-07-2019, 01:36 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Ok its official - salt water gets colder quicker and doesnt freeze solid as quickly as fresh.

Salts at -4 and not frozen at all
Fresh is just under zero and has started to crust up
Reply With Quote
  #8  
Old 27-07-2019, 03:19 AM
Kelvin Kelvin is offline
Poddy Bream
 
Join Date: Mar 2011
Posts: 60
Energy transfer depends on mass.

Salt will change the freezing temperature of the ice but the same mass of saltwater will contain the same thermal energy as normal water.
Reply With Quote
  #9  
Old 27-07-2019, 03:20 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Ok theres some very strange voodoo going on here.

After 3.5 hours - heres whats happening

The Freezers back wall reads -18

the salt water solution is down to -9 - (still liquid)

but the fresh water has stalled right at Zero degrees.

If I was guessing I'd say the ice, that has formed in the fresh water bottle, is creating an insulating wall and is keeping the temp steady

Last edited by yellow door 1; 28-07-2019 at 03:09 AM.
Reply With Quote
  #10  
Old 27-07-2019, 03:53 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Quote:
Originally Posted by Kelvin View Post
Energy transfer depends on mass.

Salt will change the freezing temperature of the ice but the same mass of saltwater will contain the same thermal energy as normal water.
Yeah my mind is still spinning from the thermometer results - so I'm having a little trouble getting my head around the thermal energy concept.

Is it - each kilogram of ice has a certain amount of "cool" - it can either be released quick and keep things very cold - or slowly and keep things not so cold.

Or like they are 2 balloons full of air - both have the same amount of air - its just how its released

Do you think there is any benefit using saltwater ice over fresh water ice to cool things down?

Last edited by yellow door 1; 27-07-2019 at 05:08 AM.
Reply With Quote
  #11  
Old 27-07-2019, 04:09 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Ahh this vid touches on thermal energy with 15lb portions of ice.

The dry ice is cold enough to freeze a coke can and make it explode - but it only lasted a couple of days under simulated normal use - (opening and shutting, left out in the sun)

The scattered ice cubes from a bag lasted 3 days - but internal temps were no where near as cold as the dry ice

and the ice in water bottles lasted 3.5 days. - internal temps were about the same or a tad warmer than the scattered ice.

Attached Images
File Type: jpg 441.jpg (54.1 KB, 0 views)

Last edited by yellow door 1; 27-07-2019 at 04:30 AM.
Reply With Quote
  #12  
Old 27-07-2019, 04:34 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310
Reply With Quote
  #13  
Old 27-07-2019, 05:33 AM
yellow door 1's Avatar
yellow door 1 yellow door 1 is offline
LEGEND Unicorn
 
Join Date: Jan 2004
Location: melbourne
Posts: 13,310

Last edited by yellow door 1; 28-07-2019 at 03:10 AM.
Reply With Quote
  #14  
Old 27-07-2019, 06:51 AM
Kelvin Kelvin is offline
Poddy Bream
 
Join Date: Mar 2011
Posts: 60
The salt water ice will provide more cooling but only by a small amount and only because there is more mass for the same volume in saltwater compared to freshwater (saltwater is denser).

Currently you are only measuring the rate of temperature change and the fresh water is slowly becoming solid. Fresh water freezes at 0 degrees and thus it will continue to read 0 until the water is all frozen.
Reply With Quote
  #15  
Old 27-07-2019, 06:57 AM
Kelvin Kelvin is offline
Poddy Bream
 
Join Date: Mar 2011
Posts: 60
Here is an interesting question

Take 1kg of water in a plastic bottle, 1kg of saltwater in a plastic bottle.
Freeze them in a freezer to a temperature of -10 degrees and let them reach a steady state.

Put each of these into a separate bucket of water and wait till the temperature equalises. Assuming all other variables are equal which will be colder?

Last edited by Kelvin; 27-07-2019 at 07:16 AM.
Reply With Quote
Reply


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 On



All times are GMT -4. The time now is 01:38 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Google