10 WHAT IS THE SIZE OF THE COOLING COIL FOR THE COMPUTER ROO

10, WHAT IS THE SIZE OF THE COOLING COIL FOR THE COMPUTER ROOM UNIT FOR SUMMER COOLING IN TONS?

Solution

For other equipment such as computers, printers etc, the load is in the form of sensible heat transfer and is estimated based on the rated power consumption. The CLF value for these equipment may be taken as 1.0 as the radiative heat transfer from these equipment is generally negligible due to smaller operating temperatures. When the equipment are run by electric motors which are also kept inside the conditioned space, then the efficiency of the electric motor must be taken into account.

Computer rooms 6.0 – 12.0 TR (Required cooling capacity (TR) for 1000 ft2 of floor area)

Q Sensible = Qin x Fu x Fr x (CLF)

Q Latent = Qin x Fu

where Qin = rated energy input from appliances Fu = Usage factor

Fr = Radiation factor. CLF = Cooling Load Factor, by hour of occupancy

: CLF = 1.0, if operation is 24 hours or of cooling is off at night or during weekends. (for computer rooms)