Direct from engine compressor, Other Engineering

Assignment Help:

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


Related Discussions:- Direct from engine compressor

Binary cycle, Consider the binary cycle using the sodium and steam/water in...

Consider the binary cycle using the sodium and steam/water in the sketch below and operating at conditions in Table 1. Draw T S Diagram and find the thermal cycle efficiency

Technical Paper, I need help summarizing a technical paper.

I need help summarizing a technical paper.

Propeller efficiency, PROPELLER EFFICIENCY: The propeller is 80 - 87% e...

PROPELLER EFFICIENCY: The propeller is 80 - 87% efficient up to approximately 400 mph.  Generally, beyond this performance will fall off, although new materials and improved bl

Heat conduction problem in hollow cylinder, Heat conduction problem in holl...

Heat conduction problem in hollow cylinder There are a lot of researches for calculating the temperature field in various shapes using different boundary and initial cond

Genetics, what is genetic engineering

what is genetic engineering

Acoustic linings in aircraft engine, Acoustic linings in Aircraft engine: ...

Acoustic linings in Aircraft engine: One method of suppressing the noise from the fan stage of a high by-pass ratio engine is to incorporate a noise absorbent liner around the

Mechanical design 2, Mechanical Design (48650) – Spring Semester 2012 Optim...

Mechanical Design (48650) – Spring Semester 2012 Optimisation Assignment – BUILDING A ROAD Teams of THREE to FIVE [3 to 5] – Worth 20% of the Semester Grade Due: Thursday 23rd Marc

Air flow control system – operation, Air flow control system – operation: ...

Air flow control system – operation: The stages of the compressor are matched to give the highest efficiency in the speed range maximum rev/min. To extend the range of smooth

Software design principles, explain the design should be traceable to the a...

explain the design should be traceable to the analysis model

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd