davel
Well-Known Member
- Joined
- Jan 17, 2009
- Messages
- 635
- Reaction score
- 71
Bunch of rocket scientists here, this should have a simple answer.
I have a small portable freezer for the car. It can drop the internal temperature to -4°F. I do not want to have it drawing it's required 5 amps when the car is not running for obvious reasons.
I have gallon jug that I can fill with water and put in the freezer. The freezer will freeze this water at about 32°F and take if further down to about 0°F. How much energy will this one gallon of water absorb before becoming liquid again at 32°F?
Now, instead of pure water, I use a 18% NaCl solution in the gallon jug. If will freeze into slush at about 5°F and continue to cool to about 0°F. How much energy will this one gallon of saltwater absorb before becoming liquid again and reaching 32°F?
IOW, am I better off using pure water or saltwater as a cold storage medium?
I have a small portable freezer for the car. It can drop the internal temperature to -4°F. I do not want to have it drawing it's required 5 amps when the car is not running for obvious reasons.
I have gallon jug that I can fill with water and put in the freezer. The freezer will freeze this water at about 32°F and take if further down to about 0°F. How much energy will this one gallon of water absorb before becoming liquid again at 32°F?
Now, instead of pure water, I use a 18% NaCl solution in the gallon jug. If will freeze into slush at about 5°F and continue to cool to about 0°F. How much energy will this one gallon of saltwater absorb before becoming liquid again and reaching 32°F?
IOW, am I better off using pure water or saltwater as a cold storage medium?