Underfloor Ventilation Air Conditioning; Figure 4.9 Air Condition In A Psychrometric Chart (Underfloor-Ventilation Air); Table 4.7 Examples Of Underfloor-Ventilation Air Conditioner Cooling Capacity; Calculations - Fujitsu M10 Series Installation Planning Manual

4.4.3

Underfloor ventilation air conditioning

Figure 4.9
Table 4.7
underfloor-ventilation air conditioner, flow rate 220 m
The values in the table involve certain characteristic curve and psychrometric chart
read errors.

Figure 4.9 Air condition in a psychrometric chart (underfloor-ventilation air)

Table 4.7 Examples of underfloor-ventilation air conditioner cooling capacity

calculations (1/2)

Item
Temperature and
humidity at the inlet
Temperature and
humidity of the air
coming out of the air
conditioner
Air conditioner sensible
heat cooling capacity
(when calculated on the
basis of temperature
differences)
Enthalpy of the air at the
conditioner inlet
C120-H007-08EN
shows the air condition for underfloor ventilation in a psychrometric chart.
summarizes procedures for calculating the cooling capacities of an
Calculated value
24C (75.2F) 45%
18C (64.4F) 65%
94.3 MJ/h (89400 Btu/h) at a flow
rate of 220 m /min (7770ft
3
i =45.4 kJ/kg
1
(19.5 Btu/lb)
4.4 Thermal Load and Cooling Capacities
/min (7770ft
3
Calculation method
Setup condition
Setup condition
)  Specific heat  Flow rate/
(T - T
1 5
3
Specific volume
/min)
=(24-18)(C) 1[KJ/(kg C)]220 (m
min) 60 (min/h) / 0.84 (m
=(75.2-64.4)(F) [Btu/(lbF)] 
3
ft /min) 60 (min/h) / 13.5 ft
Determine the enthalpy at 24C (75.2°F)
and 45% RH from the air-line diagram.
3
/min).
/
3
/kg)
3
3
/lb)
49