is there any possibilities to use coldness OR freezing temperature as a source of energy instead of heat?.PAX?
596957
I understand you assume energy can be produced from heat. You are correct, however don't forget that -24 Celsius is also a "level" of heat energy (temperature in better words). In case you can find a substance that will expand substantially under -2 degree celsius. Then when you store this substance in arctic conditions, it will become pressurized and that pressure can easily be used in for example turning some turbine blades. Any kind of energy can be converted into any other type of energy, given necessary technology...
269384
it exists but i'm not sure if u can use it for energy...it would be to strong
530330
Ice melting\nWater freezing\nWater boiling\nAmmonium chloride subliming
1165181
It's been awhile since i've done this but i'll give it my best\n\nFirst off, the first energy you need to calculate is the energy needed to raise the temperature of ice to 0 degrees C. so...\n\n(12.37 g)(.48 cal/deg/g)(35 deg) = +207.816 cal\n\nWhen the ice changes to water you have a positive heat of fusion. So...\n\n(12.37 g)(80 cal/g) = 989.6 cal\n\nNext you have to raise the water temperature from 0 degrees C to 100 degrees C. So...\n\n(12.37 g)(1.0 cal/deg/g)(100 deg) = 1237 cal\n\nNext you have the positive heat of vaporization.\n\n(12.37 g)(540 cal/g) = 6679.9 cal\n\nNext once it is steam, you must raise the temperature from 100 degrees C to 146 degrees C. So...\n\n(12.37g)(.48 cal/deg/g)(46 deg) = 273.1296 cal.\n\nNow that you have the energy for each step add them together.\n\n207.816 + 989.6 + 1237 + 6679.9 + 273.1296 = 9387.45 cal\n\nI'm pretty confident in my breakdown but it defintely wouldn't hurt to have someone else check it
1114685
It depends on the temperatures of the clouds.\n\nClouds that are below freezing: you would want ONE of these ice-forming agents:\n    1) silver iodide (most common)\n    2) dry ice\n    3) compressed liquid propane\n    4) carbon dioxide\n\nClouds that are warm: you would want ONE  of these droplet-forming agents:\n    1) salt (most common)\n    2) urea\n    3) ammonium nitrate
251506
of your choices, the one "no heat engine can be 100% efficient" is most correct, isn't it? But doesn't it primarily derive from second law, and the third law is that "absolute zero" is unattainable? [though in a tiny space, the University of Florida is testing a theory that a random tiny state would be possible, at "no motion", hence, absolute zero]
527012
It is not possible for usng slar energy directly. because the compresser operations want frequent input. ( Not continuose). In the form Solar electricity is possible. \n\nHow ever Vapour Absorption syastem is possible
72195
No.  That would actually cause you to burn less calories.  When you're cold, your body burns energy to heat you up to 37C.  When you're hot, your body has to work less to heat you to that level so you burn less calories.
200829
Take it somewhere colder than 32 degrees farenheit.\n\nWrap it in an insulated container, and wrap that in an insulated container, too.\n\nSurround it with more ice.\n\nSurround it with items that are colder than the ice (such as supercooled oil).\n\nThere are many ways.  Which one is practical for you and your uses?
252829
what's the heat source?
96708
The one that I would be most interested in using is geothermal energy. There are some really exciting new applications of geothermal energy for use in heating and cooling homes that essentially involve putting a heat pump deep enough underground that it reaches the soil zone where the temperature is constant year round. This results in having a source of heat in winter and a heat sink for cooling in summer. Every house should have one!!!\n\nSadly the new energy plan proposed by the administration cut geothermal energy research to ZERO.
1047282
Ice and Heat.\nI'm the exact same way. During the day when im just relaxing I put bags of ice on them, and at night there are heat wraps that I put on them. It works great.
206901
Add heat.\nAdd a catalyst.
320753
Anything the energy can be converted to use for.\n\nUsually it is light and heat though.
819865
Conservation of energy.\n\nCalculate the amount of heat stored in the 28ºC water using 0ºC as the starting point.  This energy must first melt the ice, for which you'll need to use the heat of fusion of water.  The remainder of the energy will warm up the entire amount of water.
588425
A "fridge" in the sense you are speaking isn't realistic. If you really want something that cold, get some liquid nitrogen and go nuts.  It's not as cold as, say, liquid helium... but oxygen in the air will nicely dissolve into liquid nitrogen, and you don't have to keep it under any pressure.  If you want to create a fridge, the best way would be to create a vacuum on the inside and line it with copper (silver plated, ideally) pipes all over the place (for conduction). Cycle the liquid nitrogen through a compressor and through the pipes. But why? This would likely cost 3 or 4 grand to get something that actually works.
951807
In terms of renewable energy this is possible. The technology can be termed "geothermal" but what you need to look into are heat pumps. This operates somewhat like a refrigerator or freezer. Heat energy can be removed from an object via exchange devices and converted.