(1) Total Fresh Air Quantities:
----------------------------------------------------------------------------
| f * Qvs * Pc | |
| - Q = ----------------| |
| 2.87 * Tc | |
| | |
| - Q = mass flow | kg/s |
| - f = selected flow factor | (0.8/1.0) |
| - Pc = cabin pressure | mbar |
| - Tc = cabin temperature | 297 K |
| - Qvs = normal volumetric flow at sea level | 1.088 cbm/s |
| - 2.87 = constant factor | |
----------------------------------------------------------------------------The nominal values from the use of the above formula:
----------------------------------------------------------------------------
| ground kg/s cruise kg/s |
|----------------------------------------------------------------------------|
| normal flow (100%) | 1.293 | 0.96 |
| minimum flow | 80 % of norm. | 80 % of norm. |
| one pack off | 60 % of norm. | 60 % of norm. |
----------------------------------------------------------------------------These nominal flows can vary by plus 5 % or minus 2 %.
----------------------------------------------------------------------------
| Total fresh air required from the APU: |
|----------------------------------------------------------------------------|
| hot day | +38 DEG.C (100.4 DEG.F) | 1.00 kg/s (Garrett) |
| hot day | +38 DEG.C (100.4 DEG.F) | 1.09 kg/s (APIC) |
| cold day | -23 DEG.C (-9.4 DEG.F) | 1.28 kg/s (Garrett) |
| cold day | -23 DEG.C (-9.4 DEG.F) | 1.49 kg/s (APIC) |
----------------------------------------------------------------------------
**ON A/C ALL
(2) Distribution Data
R **ON A/C 001-049, 051-099, 101-149, 201-299,
(Ref. Fig. 002)
AIR flows and cabin temperatures for normal operating and 1 pack failure cases
Figure 002
R 1EFF : 1 1 1CES 001-049, 051-099, 101-149, 201-299, 1 111 21-00-00 Page 5 May 01/05
R **ON A/C 151-199, 401-499,
(Ref. Fig. 002A)
**ON A/C 301-399,
(Ref. Fig. 002B)
**ON A/C ALL
Distribution data for all normal operational cases and important failure cases are shown in table 1. For each case the following data is given:
-Qt = total fresh airflow to the pressurized fuselage,
-QFD = fresh airflow to the cockpit,
-Qc = fresh airflow to the passenger cabin,
-Qr = recirculation airflow from two recirculation fans,
-number of cabin occupants,
-mixed blown air per cabin occupant,
-fresh air per flight crew member,
-mixed blown air per flight crew member.
3.
Power Supply
____________
(Ref. Fig. 003)
4.
Interface
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