Aircraft ECS Vapor Compression and ACM Coupling for Shared Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing aircraft environmental control systems suffer from efficiency losses due to the complexity of separate vapor compression and air cycle systems, particularly in the use of motors and secondary heat exchangers, leading to inefficiencies.
Innovation Solution
An integrated system combining a vapor compression system and an air cycle machine with a magnetic, electromagnetic, gear, or clutch coupling, allowing for shared power between the systems and enabling independent rotational speed control, eliminating the need for a VCS motor and ACM compressor, and optimizing airflow management through multiple conduits and control valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate vapor compression system and air cycle machine systems are used, then each system can independently condition air for cargo bay and cabin, but the system complexity increases and efficiency losses occur due to separate motors and components
Solution Approach 1:
The patent combines the vapor compression system and air cycle machine into a single integrated unit where the VCS compressor and ACM compressor share a common drive shaft, allowing both systems to be driven by a single motor while maintaining independent operational capability for cargo bay and cabin air conditioning
2Adaptability or versatility
If separate motors are used to drive the VCS compressor and ACM compressor, then each system can operate independently, but efficiency losses occur and the device becomes more complex
Solution Approach 1:
The patent merges the drive mechanisms by connecting both the VCS compressor and ACM compressor to a common drive shaft that is driven by a single motor, eliminating the need for separate motors and reducing energy losses while maintaining independent operational capability through controlled engagement mechanisms
3Use of energy by moving object
If a magnetic coupling is used to connect the drive shaft and driven shaft, then rotational speed control can be optimized and efficiency improved, but the manufacturing complexity increases
Solution Approach 1:
The patent replaces direct mechanical coupling with a magnetic coupling mechanism that connects the drive shaft and driven shaft, allowing for optimized rotational speed control and efficiency improvement while reducing mechanical wear and enabling flexible speed matching between the VCS and ACM components
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
Enhances system efficiency by utilizing engine bleed air more effectively, reducing the need for secondary components, and enabling flexible operation based on cooling and pressure requirements, thereby improving overall performance.
Implementation Method 1
the coupling is a magnetic coupling
Implementation Method 2
the coupling is an electromagnetic coupling
Implementation Method 3
a heat exchanger that receives cooling air and directs a second airflow to the first turbine
Implementation Method 4
the first turbine extracts energy from the second airflow to drive the compressor
Data Source
AI summary
An environmental control system (ECS) of an aircraft, having: a case; a vaper compression system (VCS) having a compressor and a driven shaft coupled to the compressor, wherein the compressor and the driven shaft are sealed within the case; and an air cycle machine (ACM) including a first turbine and a drive shaft coupled to the first turbine and which are outside the case, wherein the drive shaft and the driven shaft are coupled to each other via a coupling.