Fujitsu M10 Series Installation Planning Manual page 69

The formula terms are:
 Flow rate: Sensible heat from the thermal load divided by the temperature
difference and the heat removed to cool a unit volume by 1C (34F).
ow rate
 Thermal load: While the thermal load is a sum of sensible heat and latent heat,
sensible heat accounts for such a large proportion of the thermal load in a computer
room that the thermal load is assumed to be equal to the sensible heat.
Thermal load = Sensible heat + Latent heat
• 1.0 or 0.24:
• 0.84 or 1.35:
• 24C or 75.2F: Air conditioner inlet air temperature
• 11C or 52F:
• 0.9:
• 60:
• 18C or 64.4F: Outlet air temperature of an underfloor-ventilation air
C120-H007-08EN
Sensible heat from thermal load
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=
Temperature difference
Specific heat of the air [kJ/(kg  C )] or [Btu/(lb  F)]
Specific volume of the air (m
Approximate temperature of the air on the coil surface
of a room air conditioner
Approximate bypass factor of a room air conditioner
Conversion to minutes (min/h)
conditioner
4.4 Thermal Load and Cooling Capacities

Specific
heat/Specific vol
Sensible heat
3
kg) or (ft /lb)
3
/
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