Electra DNG 100 - Performance Calculation Example

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PERFORMANCE DATA & PRESSURE CURVES
SM OU12HP 2-E.2 GB
5.8 Calculation Example
Outdoor Unit OU12 5HP DCI
Indoor Unit DNG 125 DCI
Operation Mode Cooling Mode
Conditions Indoor 22qCDB/15qWB
Conditions Oudoor 30qCDB
Tubing length 50m
Cooling Capacity calculation:
Total Cooling Capacity (TC) [KW] = Capacity in conditions table x F
T
Cooling Capacity in table [KW] Tubing Length Factor (F
T
) Corrected Capacity [KW]
11.5 0.85 TC
= 11.5x0.85=9.775
Cooling Pressure calculation:
Pressure [KPa(g)] = Nominal Pressure (at 7.5m) x F
T
Nominal Pressure [KPa(g)] Tubing Length Factor (F
T
) Corrected Pressure [KPa(g)]
Discharge 2500 0.99 Pd= 2500 x 0.99 = 2475
Suction 800 0.925 Ps= 800 x 0.925 = 740
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