Compressed Air Supply System With Dual Bleed Ports
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Solution Overview
Problem
The existing compressed air supply systems require large auxiliary compressors with high pressure-increase performance to handle varying pressure demands, leading to increased size and energy loss.
Innovation Solution
A compressed air supply system that extracts compressed air from a gas turbine engine, using a low-pressure bleed air port and a high-pressure bleed air port, with an auxiliary compressor and a high-pressure bleed air valve, where the high-pressure bleed air valve is opened when an insufficient pressure state occurs to maintain appropriate pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressed air is extracted from the high-pressure compressor to ensure sufficient pressure supply, then the pressure of compressed air is maintained, but energy loss increases due to excessive pressure
Solution Approach 1:
The system changes the pressure parameter of extracted compressed air by using two different extraction points (upstream and downstream of front-stage portion) and selectively connecting them based on pressure requirements, thereby optimizing energy efficiency while maintaining supply reliability
2Adaptability or versatility
If an auxiliary compressor with high pressure-increase performance is used to handle various pressure situations, then pressure supply flexibility is improved, but the size of the auxiliary compressor becomes large
Solution Approach 1:
The compressed air extraction system is segmented into two separate extraction paths: one from upstream of the high-pressure compressor and another from downstream of the front-stage portion. This segmentation allows selective use of extraction points based on pressure requirements, reducing the burden on the auxiliary compressor and enabling a more compact design
Solution Approach 2:
The system provides multi-functionality by enabling compressed air extraction from two different locations depending on operational conditions, making the system adaptable to various pressure requirements without requiring a large auxiliary compressor
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows the auxiliary compressor to operate within a reduced pressure range, minimizing its size and energy consumption while maintaining the required pressure for the airframe.
Implementation Method 1
an auxiliary compressor that is located at the main pipe and increases pressure of the compressed air
Data Source
AI summary
A compressed air supply system that extracts compressed air from a gas turbine engine and supplies the compressed air to an air conditioning pack of an airframe. The compressed air supply system includes: a low-pressure bleed air port that extracts compressed air from an upstream side of a high-pressure compressor; a high-pressure bleed air port that extracts compressed air from a downstream side of a front-stage portion of the high-pressure compressor; a main pipe extending from the low-pressure bleed air port toward the air conditioning pack; an auxiliary compressor that is located at the main pipe and increases pressure of the compressed air; a high-pressure bleed air pipe that couples the main pipe to the high-pressure bleed air port; a high-pressure bleed air valve located at the high-pressure bleed air pipe; and circuitry that opens the high-pressure bleed air valve when the circuitry determines that an insufficient pressure state occurs.