Airconditioner (AC)- a machine that exploits atmospheric heat 

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  1. An air-conditioner has a parameter named "COP", i.e., Coefficient Of Performance.

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   2. A modern air conditioner (AC) COP is about 3.8, which means that when we heat a room ____with an AC, the AC consumes (for example) 1000 watts of electrical power and provides 3800 watts ____of heat power!

     This is the reason why AC is so economical when the outside temperature is above 5 degrees

      Celsius and below 15Celsius.
 

   3. So, is an AC is a Perpetuum mobile machine? how can a machine provide more power than it ____consumes?
 

      The answer is: an AC does not generate power at all! it takes the heat, i.e., thermal energy stored 

       in the air of space "A" (OUTDOOR) and transfers the heat into space "B" (INDOOR).

     

  4. Energy/power relations in airconditioner:

      Note: the values in the AC diagram taken from Innova 9000 AC.
 

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  Conclusions:

     1. Heat can be taken from the air. This can be done both by nature                         (hurricane) and by an air-conditioner.

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     2. Taking 1 unit of heat energy from the air requires only about a 1/4 unit              of energy... 

    

      3. Air prefers to convert its own thermal energy into kinetic energy.

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