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48 C120-H007-05EN
CHAPTER 4 Air Conditioning
Air conditioner sensible
heat cooling capacity
(when calculated on the
basis of sensible heat
enthalpy differences)
124.4 MJ/h
(117,931 Btu/h)
(i
4
- i
3
) × Flow rate/Specific volume
=12.9 (kJ/kg) × 135 (m
3
/min) × 60 (min/h) /
0.84 (m
3
/kg)
=5.5 (Btu/lb) × 4770 (ft
3
/min) ×
60 (min/h) / 13.5 (ft
3
/lb)
Air conditioner sensible
heat cooling capacity
(when calculated on the
basis of temperature
differences)
124.4 MJ/h
(117,931 Btu/h)
(T
1
- T
3
) × Specific heat × Flow
rate/ Specific volume
=(24-11.1)(°C) × 1[kJ/(kg ⋅ °C)]
× 135 (m
3
/min) × 60 (min/h)
/ 0.84 (m
3
/kg)
=(75.2-52)(°F) × 0.24[Btu/(lb⋅ °F)] × 4770
(ft
3
/min) × 60 (min/h) / 13.5 (ft
3
/lb)
Table 4.6 Examples of typical air conditioner cooling capacity calculations (2/2)
Item Calculated value Calculation method