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庞巴迪挑战者300公务机机组操作手册 Bombardier Challenger-空调和增压 Air Cond and Press(8)

时间:2011-11-01 12:55来源:蓝天飞行翻译 作者:公务机
曝光台 注意防骗 网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
  
Independent temperature control systems for the COCKPIT and CABIN can be controlled in both automatic and manual modes from the AIR COND/BLEED control panel located on the center pedestal.
COMPONENTS AND OPERATION INTEGRATED AIR SYSTEM CONTROLLERS
Two integrated air system controllers (IASCs) monitor and control the air conditioning systems.
Each controller has two channels, A and B. Channel A is dedicated to air conditioning control and monitoring, avionics cooling and cabin pressurization. Channel B is dedicated to wing anti-ice control and monitoring, bleed leak detection and limited backup control of the air conditioning system. IASC 1 channel B also has a backup cabin pressure sensor.
Sep 13/2004 Flight Crew Operating Manual Volume 2 REV 1 CSP 100-6
02-03-01 AIR CONDITIONING SYSTEM (Cont)
AIR CONDITIONING PACK
The air conditioning pack (PACK) provides conditioned air for the fuselage compartments by decreasing the temperature and water content of the bleed air used in the conditioning process.
The PACK is supplied with pre-cooled bleed air, for cabin air conditioning and cabin pressurization.
On leaving the precooler, bleed air is ducted into the PACK, at the primary heat exchanger inlet. The primary heat exchang-er is used to reduce bleed air temperature. On leaving the primary heat exchanger, the bleed air is directed into the com-pressor of the air cycle machine, where the temperature and pressure increases.
The air then flows through the secondary heat exchanger, where a pressure loss occurs and the temperature is reduced by exchanging heat with the ram air before flowing to the reheater/condenser.
At the condenser outlet, the condensed water is extracted by centrifugal effect in the water extractor then routed to the re-heater cold air pass where air temperature increases prior to entering the air cycle machine.
The air is then expanded through the turbine of the air cycle machine to a pressure close to cabin air pressure, and subse-quently, the air temperature is reduced.
From the turbine outlet, the air flows through the condenser heat exchanger where it is used as a coolant for the water sep-aration loop.
The air temperature at the PACK discharge can be adjusted by opening or closing the temperature control valve. The tem-perature control valve modulates the hot air flow which by-passes the air cycle machine between the primary heat exchang-er inlet and the air cycle machine turbine outlet.
The ram air is supplied upstream of the dual heat exchanger by the ram air system. It then flows through the dual heat ex-changer and is collected by the plenum.
On ground static aircraft operation, the ram air flow is generated by the suction effect of the air cycle machine fan. This suction closes the plenum check valve. Whenever dynamic air is available at ram air inlet, the plenum check valve opens, and the air cycle machine fan is by-passed; the ram air is then driven by the total pressure available at ram air inlet.
 
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