| Author |
Message
|
| ylw06 |
 Posted: Fri Nov 09, 2007 5:27 pm Post subject: A material that absorb heat |
 |
|
Forum Freshman
Joined: 09 Nov 2007
Posts: 8
Location: london
|
I would like to find a material that can absorb heat from a bottle of water.
And basically make the water chill around 3-4 degrees from the room temperature.
I know water has a very high specific heat capacity so lots of energy needed to be absored to increase its temperature by 1 degree celcius.
I just wanna make a bottle and surrounded by this type of materil or liquid that absorb heat from the content of the bottle( let say the content has in genral the same specific heat capacity as water), and make the content chill and ready to serve.
This is for my Ideas challenge, if you guys have any ideas or know any chemicals that have this physical properties
Please tell me. I would be more than delight.
Cheers |
|
| Back to top |
|
 |
| leohopkins |
| Posted: Fri Dec 14, 2007 3:46 am Post subject: |
|
|
Forum Professor
Joined: 10 Dec 2006
Posts: 1124
Location: Croydon, England
|
Unfortunately there isnt one. (research thermal transfer entropy)
Only if you placed something that was already a few degrees lower around the bottle would it work, OR if you placed some chemicals around the bottle that was undergoing an endothermic reaction; such as refridgerants.
_________________
The hand of time rested on the half-hour mark, and all along that old front line of the English there came a whistling and a crying. The men of the first wave climbed up the parapets, in tumult, darkness, and the presence of death, and having done with all pleasant things, advanced across No Man's Land to begin the Battle of the Somme. - Poet John Masefield.
www.leohopkins.com |
|
| Back to top |
|
|
| jacketate |
| Posted: Wed Jan 02, 2008 7:10 am Post subject: |
|
|
Forum Sophomore
Joined: 03 Dec 2007
Posts: 167
|
you could create a water bath. emerge your water bottle in the water bath. add baking soda to the water in the water bath.
baking soda + water is weakly endothermic and would take some of its energy from the water bottle.
I'm not sure what quantities you need to cool it to the required information. Trial and error is probably the easiest way =)
_________________
Liberty is the souls right to breathe |
|
| Back to top |
|
|
| KALSTER |
| Posted: Wed Jan 02, 2008 8:14 am Post subject: |
|
|
Forum Professor
Joined: 08 Sep 2007
Posts: 1486
Location: South Africa
|
What about suspending a cloth bag in a metal container. Then you could have a knob integrated into the bottom that when turned, retracts a piston that creates a vacuum of some degree. Then the water can evaporate and so chill the water inside the cloth bag. You might even add a dehumidifying agent in the bottom that you could empty now and then. It might be a tad heavy  If weight is not a big concern, you could think of a way of miniaturizing a cooling unit, like a miniature, battery powered fridge. You could even cover the outside in solar panels as an extra source of electricity. Just a brain fart 
_________________
"Gullibility kills" - Carl Sagan |
|
| Back to top |
|
|
| VTMechEng |
| Posted: Mon Feb 04, 2008 5:31 pm Post subject: |
|
|
Forum Freshman
Joined: 03 Feb 2008
Posts: 12
|
| leohopkins is right. You're not going to find a material that can magically create heat transfer. A simple energy balance will show you that you'd have to put either some sort of work into the system or a heat generation process (such as a chemically endothermic reaction as suggested). |
|
| Back to top |
|
|
| miomaz |
| Posted: Wed Feb 13, 2008 3:39 pm Post subject: |
|
|
Forum Junior
Joined: 17 Oct 2006
Posts: 265
Location: Germany
|
I don't think that I am mistaken: all materials absorb heat if the temerature is lower than the material next to it.
(I was playing with the idea of fixing the molecules and atoms in a substance, though magnets, but then again a portable mini refrigerator would be less costly)
_________________
I haven't come to fight my word, but to find the truth. |
|
| Back to top |
|
|
|
|
