Hybrid Air Conditioning Cycle for Aircraft Bleed Pressure Control
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Solution Overview
Problem
The existing environmental conditioning systems for aircraft are inefficient, consuming more fuel than necessary due to excessive energy use in conditioning air, as they rely on compressor pressure that exceeds the required pressure for most operating points.
Innovation Solution
An environmental conditioning system that incorporates a compressor driven by a turbine, coupled with an evaporator to cool the air efficiently, along with a reheater and a water removal device, optimizing power usage by controlling air flow and pressure through a motor-assisted shaft and utilizing a vapor cycle with refrigerant to balance conditioning between air and vapor cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If bleed air is used from the engine compressor for air conditioning, then air conditioning is provided, but excessive pressure is generated that exceeds the required pressure for conditioning
Solution Approach 1:
The patent extracts only the necessary amount of pressure required for air conditioning by using a dedicated compressor and turbine system separate from the engine compressor. The turbine-driven compressor draws air from the engine compressor at a specific pressure point and regulates it to the exact pressure needed for the air conditioning system, rather than using excess pressure directly from the engine compressor.
Solution Approach 2:
The patent changes the pressure parameter by introducing a turbine-driven compressor that can independently regulate output pressure. The turbine controls the compressor's operation to deliver air at the precise pressure required for air conditioning, transforming the pressure from an excess condition to an optimized parameter.
2Quantity of substance
If excessive pressure is generated by the engine compressor, then air can be supplied to the air conditioning system, but energy is wasted generating unnecessary pressure
Solution Approach 1:
The patent introduces a turbine as an intermediary device between the engine compressor and the air conditioning system. The turbine acts as a pressure regulation mediator, allowing the system to capture and utilize the engine compressor's output while independently controlling the final pressure delivery to match air conditioning requirements, thereby eliminating energy waste from over-pressurization.
Solution Approach 2:
The patent replaces the direct mechanical connection from engine compressor to air conditioning system with a turbine-driven compressor system. This substitution allows for precise pressure control and energy optimization, as the turbine can regulate the compressor's operation to deliver exactly the pressure needed, avoiding the energy waste associated with generating and then throttling excess pressure.
3Use of energy by moving object
If the turbine-driven compressor is used to regulate pressure, then energy efficiency is improved, but the system complexity increases
Solution Approach 1:
The patent applies multi-functionality by designing the turbine-driven compressor system to serve multiple purposes: it provides air supply, regulates pressure, and optimizes energy efficiency all within a single integrated system. The turbine itself serves dual functions as both a power source for the compressor and a pressure control mechanism, reducing the need for separate control systems and valves.
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 system achieves optimized power usage and efficient air conditioning by minimizing energy consumption, providing conditioned air at desired temperatures and humidity levels, and allowing for the recirculation of air while maintaining air quality without excessive energy expenditure.
Implementation Method 1
An evaporator is in communication with the compressor in the air flow path. The evaporator is configured to cool air from the compressor.
Implementation Method 2
A turbine drives the compressor. The turbine is coupled to the compressor.
Data Source
AI summary
An environmental conditioning system has a compressor for compressor air in an air flow path. A turbine drives the compressor and is coupled to the compressor. An evaporator is in communication with the compressor. The evaporator is configured to cool air from the compressor.