Aircraft Compressor-Turbine Air Bypass for Process Air Temperature Control
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Solution Overview
Problem
Aircraft air conditioning systems face challenges in maintaining sufficient cooling capacity when process air temperatures rise, leading to potential damage to components and discomfort for passengers, especially during takeoff or in case of malfunctions.
Innovation Solution
A compressor/turbine arrangement with a detection device to monitor process air temperature, a cooling device in the process air line, and a control device to manage the process air flow, allowing for continuous operation by reducing process air temperature and preventing excessive heating during compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If process air is compressed in the compressor, then cooling capacity is improved, but temperature increases excessively causing damage to components
Solution Approach 1:
The patent applies preliminary action by cooling the process air before it enters the compressor through a cooling device (heat exchanger). This pre-cooling prevents excessive temperature rise during compression, allowing the compressor to operate at full capacity without damaging the downstream components. The detection device monitors temperature and triggers the cooling device in advance to maintain safe operating conditions.
Solution Approach 2:
The patent introduces a cooling device as an intermediary between the process air source and the compressor. This intermediary component (heat exchanger) mediates the temperature of the process air, removing excess heat before the air enters the compressor. This allows the system to maintain high cooling capacity while preventing temperature-related damage to components.
2Reliability
If process air temperature is reduced before compression, then component safety is improved, but cooling capacity decreases
Solution Approach 1:
The patent applies dynamics by making the cooling process adjustable rather than fixed. The control device dynamically controls the cooling device based on real-time temperature detection. When temperature is already low, the cooling device is reduced or deactivated, preserving cooling capacity. When temperature rises, the cooling device is activated to protect components. This dynamic adjustment resolves the contradiction between component safety and cooling capacity.
Solution Approach 2:
The patent changes the operational parameters of the cooling device based on detected temperature conditions. The control device adjusts cooling intensity, flow rates, or activation states of the cooling device according to real-time temperature measurements. This parameter adjustment allows the system to maintain component safety while minimizing the impact on cooling capacity by only applying cooling when necessary.
3Reliability
If cooling device is activated to reduce temperature, then component damage is prevented, but system complexity increases
Solution Approach 1:
The patent applies self-service by implementing a closed-loop control system where the detection device automatically monitors temperature and the control device automatically activates or adjusts the cooling device based on detected conditions. This self-regulating system protects components without requiring manual intervention or complex external control systems. The system serves itself by using its own sensors and controllers to maintain safe operating conditions.
4Temperature
If process air flow through connecting line is increased, then temperature control is improved, but energy loss increases
Solution Approach 1:
The patent applies feedback by using the detection device to continuously monitor process air temperature and feeding this information to the control device. The control device then adjusts the cooling device and connecting line flow based on this feedback. This closed-loop feedback system ensures that cooling and flow adjustment are applied only when and to the extent necessary for temperature control, minimizing energy loss while maintaining effective temperature management.
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
Ensures continued operation of the air conditioning unit with sufficient cooling capacity, preventing damage to components and maintaining passenger comfort even when process air temperatures exceed safe limits.
Implementation Method 1
detection device which is designed to detect a signal characteristic of the temperature of the process air flowing through the process air supply line
Implementation Method 2
cooling device which is arranged in a process air line connecting the compressor to the turbine and is designed to cool the process air exiting the compressor and flowing through the process air line in the direction of the turbine
Implementation Method 3
In the turbine 124, the air is expanded and in the process cooled again
Implementation Method 4
In the compressor 108, the process air is compressed and heated in the process
Data Source
AI summary
The invention relates to a compressor/turbine arrangement for use in an air conditioning unit of an aircraft air conditioning system comprising a process air supply line which is designed to supply process air generated by a process air source to a compressor. A detection device is designed to detect a characteristic signal for the temperature of the process air flowing through the process air supply line. A turbine is designed to drive the compressor. A cooling device is disposed in a process air line connecting the compressor to the turbine and is designed to cool the process air coming out of the compressor and flowing through the process air line in the direction of the turbine. Downstream of the cooling device a connecting line branches off from the process air line and opens into the process air supply line. A control device is designed to control a process air flow through the connecting line in dependence on the signal detected by the detection device.