'Coldwind' Air Infiltration Sensible heat gain computation (SI)
Room volume m³ X Product volume displacement factor X ACH X 0.000335 X (To - Ti) = kW Sensible heat.
Where:-
Product volume displacement factor is a function of the amount of total air space displaced by items stored in the room. Calculated automatically by algorithm. Typically from 0.25 to 0.75 depending upon room size (volume) and aspect ratios comparing internal length, width and height dimensions.
ACH is Air Changes per Hour
0.000335 is a constant
To is Ambient (or air external to the room) Dry Bulb °C
Ti is Room Temperature Dry Bulb °C
Note:
Product volume displacement factor may be overruled (factor 1.0) if desired, for purposes of calculating Freezer pull down gains in empty rooms for example, by application of a Special Features Codes
See also:
additional ventilation from other loads selected
air changes (per day [24 hours])
ventilation
Special Features Codes
'Coldwind' Air Infiltration Sensible heat gain computation (Imperial)
Room volume ft³ X Product volume displacement factor X ACH X 0.018 X (To - Ti) = Btu/hr Sensible heat.
Where:-
Product volume displacement factor is a function of the amount of total air space displaced by items stored in the room. Calculated automatically by algorithm. Typically from 0.25 to 0.75 depending upon room size (volume) and aspect ratios comparing internal length, width and height dimensions.
ACH is Air Changes per Hour
0.018 is a constant
To is Ambient (or air external to the room) Dry Bulb °F
Ti is Room Temperature Dry Bulb °F
Note:
Product volume displacement factor may be overruled (factor 1.0) if desired, for purposes of calculating Freezer pull down gains in empty rooms for example, by application of a Special Features Code.
See also:
additional ventilation from other loads selected
air changes (per day [24 hours])
ventilation
Special Features Codes