Aircraft Cabin Air Cooling With Cryogenic Compression
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Solution Overview
Problem
Existing aircraft air conditioning systems are complex, energy-intensive, and increase fuel consumption due to the need for high-pressure air expansion, multiple air withdrawals, and engine complexity, which complicates installation and operation.
Innovation Solution
An air conditioning system that withdraws ambient air, compresses it, and cools it using a cryogenic fluid, eliminating the need for turbochargers and multiple heat exchangers, and allowing for independent operation from engine speed variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is withdrawn from compressor stages of main engines and expanded to reach required pressure level, then air conditioning function is achieved, but system complexity increases due to turbocharger and heat exchangers
Solution Approach 1:
The invention extracts the air withdrawal function from the main engines by introducing a dedicated air withdrawal module that draws ambient air directly from the external environment. This separation eliminates the dependency on engine compressor stages, thereby removing the need for turbochargers and multiple heat exchangers while maintaining reliable air conditioning function.
Solution Approach 2:
The air withdrawal module serves multiple functions: it withdraws ambient air, provides cooling for the compression module through its heat exchanger, and supplies air to the compression module. This multi-functionality consolidates what would otherwise require separate components, reducing overall system complexity.
2Temperature
If multiple air withdrawals are performed from different regions of the aircraft, then cooling requirements are met, but internal structure complexity and drag increase
Solution Approach 1:
The invention merges the cooling function with the air withdrawal function by integrating a heat exchanger into the air withdrawal module. The heat exchanger uses the cold ambient air drawn by the air withdrawal module to cool the compressed air, eliminating the need for separate cooling systems and multiple air withdrawals from different aircraft regions.
3Reliability
If air is withdrawn from compressor stages of main engines, then air conditioning is provided, but engine performance and operability are reduced
Solution Approach 1:
The invention extracts the air supply function from the main engines by introducing a dedicated air withdrawal module that draws ambient air from the external environment. This separation eliminates the dependency on engine compressor stages, thereby improving engine operability and performance while maintaining reliable air conditioning function.
4Reliability
If air is withdrawn at compressor stages of main engines, then air conditioning function is achieved, but fuel consumption increases due to reduced propulsion air
Solution Approach 1:
The invention extracts the air supply function from the main engines by introducing a dedicated air withdrawal module that draws ambient air from the external environment. This separation eliminates the dependency on engine compressor stages, thereby reducing fuel consumption by maximizing air available for propulsion while maintaining air conditioning function.
5Stress or pressure
If complex system with turbocharger and heat exchangers is used for air expansion, then pressure regulation is achieved, but energy consumption increases
Solution Approach 1:
The invention extracts the cooling function from the complex expansion system by introducing a dedicated cooling module with a heat exchanger that uses cold ambient air. This allows the compression module to operate more efficiently with lower energy consumption while achieving the required pressure and temperature regulation.
Solution Approach 2:
The heat exchanger acts as an intermediary between the cold ambient air and the compressed air. It transfers thermal energy from the compressed air to the cold ambient air, achieving cooling without requiring the compressed air to expand through a complex turbocharger system, thereby reducing energy consumption.
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 solution simplifies the aircraft structure, reduces drag and fuel consumption, and improves engine installation and maintenance by using a self-contained cooling module with cryogenic fluids, achieving efficient thermal regulation without expanding air, thus lowering energy requirements.
Implementation Method 1
an air compression module (5) configured for compressing the withdrawn air flow
Implementation Method 2
an air cooling module (10) comprising means for storing at least one coolant and configured for cooling the compressed air flow by means of said coolant
Implementation Method 3
The cooling module is configured for receiving a first air flow to be cooled and for cooling said first air flow by means of a cryogenic fluid
Data Source
AI summary
Air conditioning system for the pressurized cabin of an aircraft, said system (1) being characterized in that it comprises an air withdrawal module (3) configured for withdrawing ambient air from outside the aircraft, an air compression module (5) configured for compressing the withdrawn air flow (F1) and an air cooling module (10) comprising means (15) for storing at least one coolant configured for cooling the compressed air flow (F2, F3).