samulito Posted October 27, 2005 Share Posted October 27, 2005 how many calories are in a cubic meter of air?(room temperature plz) and by calories i mean thermal units, not the thing i'm trying to burn to lose weight, but the calories that heat 1 liter of water by 1 degree celsius. or BTU's can be used instead of calories. Link to comment Share on other sites More sharing options...
samulito Posted October 27, 2005 Author Share Posted October 27, 2005 uhhh, to tell the truth i'd like to know how much energy might be extractable from the normal room temperature of air. Link to comment Share on other sites More sharing options...
NeonBlack Posted October 28, 2005 Share Posted October 28, 2005 The energy (heat) is the mass times the heat capacity times the absolute temperature. In other words, h=CmT How you're going to "extract" this energy is up to you I guess. Link to comment Share on other sites More sharing options...
insane_alien Posted October 29, 2005 Share Posted October 29, 2005 a calorie is the energy required to heat 1 GRAM of water by 1*C. for a kilogram it would be a kilocalorie. try google. extraction of this heat energy to provide electricity isn't feasible so don't even think about it. why don't you use SI units(joules in this case) then everybody will know what you are talking about wherever they come from Link to comment Share on other sites More sharing options...
swansont Posted October 29, 2005 Share Posted October 29, 2005 The available energy depends on the temperature of the reservoir into which you will eject the waste heat, and the mechanism you use to do work. heat engines Link to comment Share on other sites More sharing options...
J.C.MacSwell Posted November 1, 2005 Share Posted November 1, 2005 However if you are trying to extract it for the purpose of heating rather than doing work, as with a heat pump, it can be well worthwhile. Greater than 100% efficiencies can/should be obtained (not thermodynamic efficiencies, no laws are broken and entropy increases overall ). Link to comment Share on other sites More sharing options...
samulito Posted November 2, 2005 Author Share Posted November 2, 2005 what about a boiler that uses N2 as the boiling substance? Link to comment Share on other sites More sharing options...
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