Basics of Mechanical Engineering

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Factors considered for designing an Air Conditioner


A.      Sensible heat gains:
         1. solar heat (radiation)
         2. heat leakage through walls and doors
         3. body heat of persons inside
         4. heat due to electric lights and fans
         5. heat of any other things entering the A.C room
B.     Latent heat gains:
         1. heat from water or sweat of human beings
         2. heat from air entering through leakages
         3. steam or vapour heat from articles kept inside.
C.     Heat gains from ventilation air:
        1. sensible heat gain due to temperature difference of the air inside and outside of the room
        2. latent heat gain due to air humidity difference between inside and outside etc.

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