Direct from engine compressor, Other Engineering

Direct from engine compressor:

A Load valve is switched on from the flightdeck, power for the switch is available once the APU has achieved 95% + 3 sec. This energises the switcher valve solenoid, which vents the lower chamber (B) of the control piston and pressurises the top chamber (A). The piston will move down and open the butterfly valve. The bleed air will flow and the EGT will rise, at a predetermined value the Load Thermostat will start to open which will reduce the pressure acting on the top of the piston. This will cause the piston to move up by spring pressure and thus back off the butterfly valve. If the EGT rise is excessive then it could close the valve. The valve will modulate under the control of EGT. The Load thermostat is set at a lower setting than the acceleration thermostat setting to prevent hunting of the system.

50_direct from engine compressor.png

An electronically controlled APU uses the same principle, but the ECU controls a servo valve in the load control valve instead of the load thermostat, see figure.

1719_direct from engine compressor1.png

Posted Date: 9/12/2012 7:24:09 AM | Location : United States







Related Discussions:- Direct from engine compressor, Assignment Help, Ask Question on Direct from engine compressor, Get Answer, Expert's Help, Direct from engine compressor Discussions

Write discussion on Direct from engine compressor
Your posts are moderated
Related Questions
Providing fire resistant: If the building does not provide everyone with alternative exit routes then it may be acceptable for people to pass the fire if they are separated f

Electronic APU fuel control System in Aircraft : Electronic fuel control emulates the mechanical system, however it provides control in a slightly different way. The electronic

Installing FLUENT on a MWS machine Fluent was originally developed on unix and graphical output was provided by calls to the X Windows graphics system For this reason provided by c

Rajender Kumar was a production worker at competent Motors Limited (CML) which made components and accessories for the automotive industry. He had worked at CML for almost seven ye

Parasitic resistances This is particularly noticeable if the transducer is a long way from where the power supply is located and if the transducer resistance is small.

Let C (K) denote a European vanilla Call option with strike price K. Assume that all options are identical except for strike price, and strike prices satisfy K1 What are the no-ar

I need assistance in SAS software based stats questions, can you provide me solution?

two frames are not joint properly so create gap between two frames so material lick from this gap

#i need help with plumbing/ engineering assignments, from an expert with australian codes, there is any chance,thank you .

seasoning of timber