飞行翻译_公务机_公务航空_Business Jet_Business Aviation

The hot bleed air is pre-cooled inside the primary part of the exchanger. The air flow is then routed to the turbo-cooler compressor or through the turbofan depending on the by-pass electric valve position. At the turbo-cooler compressor outlet, the air is cooled inside the main heat exchanger prior to entering the turbine section of the turbo-cooler.
Turbofan

The purpose of the turbofan is to accelerate the cooling outside airflow through the exchangers when airplane True Air Speed is lower than 300 kt.
It consists of a fan and turbine mounted on opposite ends of a common shaft. 
When airplane speed becomes high enough, the turbine/fan assembly is prevented from rotating by a braking system composed of a disk brake controlled via an electric valve.
The electric and the by-pass electric valves are automatically controlled according to:
-
 airplane speed,

-
 slats position,
-landing gear position.

Turbo-cooler

The turbo-cooler is a single stage compressor and turbine. The turbo-cooler operates in conjunction with the heat exchangers and the water separator to produce cooled and dry air for the conditioning system.

Water-separators
The water separator separates and collects the water droplets formed in the condenser. The water is then routed to the atomizer. Two atomizers discharge it, as a fine mist, into the cooling airflow of the main heat exchanger and contribute to the cooling process.
Anti-icing system
An anti-icing system is used to prevent ice in the turbo-cooler turbine thanks to hot air picked off at the primary heat exchanger inlet and introduced into the turbo-cooler turbine casing. Hot air admission is controlled through an automatic valve to maintain the inlet temperature turbine above + 3°C (37°F).
Optional emergency anti-icing valve
For airplane fitted with the optional M2521 modification, when the standard turbine anti-icing valve is detected jammed open, the optional electric turbine anti-icing valve can be closed by activating the CLOSE soft key in the ECS synoptic (soft key available only when the option is installed).
　
中国公务机网 www.gongwuji.com
公务机翻译 www.aviation.cn
本文链接地址：DASSAULT FALCON 900EX EASY SYSTEMS SUMMARY Air Conditioning & Pressurization(3)