Variable Speed Compressor Air Discharge Temperature Control
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Solution Overview
Problem
Aircraft pneumatic systems face inefficiencies due to variable demand for compressed air, which can lead to either insufficient or excessive power extraction from the engine, resulting in suboptimal fuel consumption and operational inefficiencies.
Innovation Solution
A method and system that utilize a variable speed air compressor controlled by a compressor controller to supply compressed air to pneumatic systems, ensuring the air meets specific performance demands while operating below a maximum allowable air discharge temperature limit, thereby optimizing the compressor's operation to match the demands of each pneumatic system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the throttle is repositioned to adjust flight idle thrust or ground idle thrust to meet pneumatic system demands, then the compressed air supply meets pneumatic system requirements, but fuel consumption increases due to inefficiencies
Solution Approach 1:
The patent applies a variable speed compressor that can dynamically adjust its operating speed based on real-time pneumatic system demands. This dynamic adjustment allows the compressor to match supply with demand, eliminating the need to reposition the throttle and thereby reducing fuel consumption while maintaining reliable compressed air supply.
Solution Approach 2:
The patent changes the operating parameters of the compressor by varying its speed to match the pneumatic system demands. By adjusting the compressor speed parameter rather than changing throttle position, the system meets pneumatic requirements without the fuel inefficiency associated with throttle repositioning.
2Reliability
If the throttle is repositioned to adjust flight idle thrust or ground idle thrust, then compressed air supply meets pneumatic system demands, but operational efficiency decreases
Solution Approach 1:
The variable speed compressor provides dynamic adjustment of compressed air supply to match pneumatic system demands, improving operational efficiency compared to static throttle positioning. The system can adapt to changing demands without sacrificing reliability.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor pneumatic system demands and adjust compressor speed accordingly. This feedback loop ensures optimal operational efficiency by matching supply with actual demand while maintaining reliable compressed air availability.
3Use of energy by moving object
If a variable speed compressor is used to supply compressed air to pneumatic systems, then fuel consumption is reduced by matching supply with demand, but the system complexity increases
Solution Approach 1:
The variable speed compressor reduces fuel consumption by dynamically matching supply with demand. While this introduces control complexity, the system manages this through integrated control mechanisms that monitor pneumatic demands and adjust compressor speed accordingly, achieving energy efficiency despite the added complexity.
4Reliability
If bleed air is extracted in excess to meet maximum demand, then pneumatic system requirements are satisfied, but unnecessary power extraction causes higher fuel burn
Solution Approach 1:
The variable speed compressor prevents excessive power extraction by dynamically adjusting its speed to match actual pneumatic system demands. This eliminates the need to extract bleed air in excess of maximum demand, thereby reducing fuel burn while maintaining reliable supply through on-demand adjustment rather than over-capacity extraction.
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 approach reduces fuel consumption, simplifies electrical and air conditioning systems, facilitates integration with modern engines, and improves operational efficiency by ensuring compressed air is supplied at optimal pressure, flow rate, and temperature, thus reducing unnecessary fuel burn and enhancing overall system performance.
Implementation Method 1
a variable speed air compressor configured to supply compressed air to the pneumatic systems
Data Source
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AI summary
A method for controlling compressed air (102) sent to pneumatic systems (12). The method includes acquiring a set of performance demands (132) for each of a plurality of pneumatic systems (12) in a platform, where the performance demands (132) indicate needs for the compressed air (102) supplied to each of the pneumatic systems (12), identifying a maximum allowable air discharge temperature limit (138) of a variable speed air compressor (110) configured to supply compressed air (102) to the pneumatic systems (12), and controlling an operation of the variable speed air compressor to supply the compressed air (102) to the pneumatic systems (12) to meet the acquired performance demands (132) for at least one of the pneumatic systems (12) while operating the variable speed air compressor below the maximum allowable air discharge temperature limit (138).