Integrated Aircraft Cooling Machine Mechanical Coupling
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Solution Overview
Problem
The increasing costs and weight burden of electrical power generation and distribution systems in aircraft propulsion engines due to the demand for efficient thermal management in air and vapor cycle systems, which are exacerbated by the need for heavy and costly electrical power conditioning devices.
Innovation Solution
An integrated air-vapor cycle (A-VC) machine that mechanically couples a turbine from the air cycle system to the compressor of the vapor cycle system, using compressed air to drive the vapor cycle compressor, thereby reducing the need for electrical power conditioning devices and enhancing cooling efficiency while minimizing weight and volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electrical power generation and distribution systems are used to drive vapor cycle compressors, then cooling performance is maintained, but system weight and complexity increase
Solution Approach 1:
The patent combines the air cycle system and vapor cycle system into an integrated architecture where the turbine from the air cycle system mechanically drives the compressor of the vapor cycle system. This merging eliminates the need for separate electrical power generation and distribution systems, reducing overall system weight while maintaining cooling performance through direct mechanical coupling between the two cycles.
Solution Approach 2:
The turbine in the air cycle system serves a dual function: it expands compressed air to provide cooling and simultaneously drives the vapor cycle compressor. This multi-functionality allows the same component to fulfill both air cycle cooling requirements and vapor cycle compression needs, eliminating redundant electrical infrastructure.
2Power
If electrical power conditioning devices are added to thermal management systems, then cooling capacity increases, but device complexity and cost increase
Solution Approach 1:
The patent merges the power transmission function into the mechanical coupling between the air cycle turbine and vapor cycle compressor, eliminating the need for separate electrical power conditioning devices. The mechanical direct-drive approach simplifies the system architecture while maintaining adequate cooling capacity for avionics and other thermal management requirements.
3Adaptability or versatility
If separate air cycle and vapor cycle systems are used, then cooling flexibility is maintained, but system volume and weight increase
Solution Approach 1:
The patent integrates the air cycle and vapor cycle systems into a compact unified structure where the turbine-compressor mechanical coupling shares common infrastructure. This merging reduces overall system volume and weight while preserving the flexibility to independently control both cooling cycles for different avionics and thermal management applications.
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 achieves significant weight and volumetric savings in the electrical distribution system, maintains efficient heat load management, and provides improved cooling performance in a more compact system, reducing the overall complexity and power demand on the aircraft.
Implementation Method 1
through the expansion of air across the second turbine from the first compressor
Implementation Method 2
a first compressor driven by an engine
Implementation Method 3
a condenser
Implementation Method 4
an evaporator
Data Source
AI summary
An aircraft cooling machine is provided that includes a closed loop air cycle system and a vapor cycle system that both provide cooling aircraft loads. The closed loop air cycle system includes a compressor and a turbine and the vapor cycle system includes a compressor, condenser and an evaporator. A coupler is provided that pneumatically couples the turbine in the closed loop air cycle system to the compressor in the vapor cycle system via existing pneumatic power in the closed loop air cycle system.