How to determine an Air Quantity in Air conditioning ?

The air quantity selected should offset the room sensible and latent heat load. It should also handle the total sensible and latent heat loads i.e., including the outdoor (fresh) air loads, etc. The air quantity can be determined from the formula,

Q da = ERSH / ( ( t - tadp ) (1 - BF) 60 * p * C )

where, Q da - Dehumidified air quantity (m3 / min),

ERSH - Effective Room Sensible Heat (kJ / hr),

t - Room Design Temperature,

t adp - Apparatus Dew point ,

C - Specific Heat of Air,

BF - Bypass factor of the coil,

P - Density Of Air.

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Mechinopedia For Mechanical Engineers

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