Heat Pipe Cooling for Hot Air Duct Regulator and Actuator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current regulation systems for turbojet engines require dedicated cooling, leading to additional fuel consumption and efficiency losses as they struggle to manage increasing air temperatures, necessitating increased cool air streams from the secondary air flow.
Innovation Solution
A pneumatic regulation system incorporating a cooling system with heat pipes and an outer radiator, which efficiently dissipates heat without augmenting the cool air streams, using heat pipes to transfer heat from the regulator and actuator to an outer radiator subjected to a secondary air flow, thereby maintaining system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If dedicated cooling is provided to the regulator and actuator using cool air streams from the secondary air flow, then the regulator and actuator can operate optimally at high temperatures, but the fuel consumption increases and engine efficiency decreases
Solution Approach 1:
The cooling system is segmented into multiple independent heat pipe units, each serving specific components (regulator, actuator). This allows targeted cooling only where needed, rather than cooling the entire system, thereby reducing the overall cool air stream requirement and associated fuel consumption while maintaining optimal operation of temperature-sensitive components.
Solution Approach 2:
Heat pipes serve as intermediary devices between the hot components (regulator, actuator) and the cool air stream. The heat pipes transfer heat from the components to the cooling system efficiently, allowing the components to operate at higher temperatures while minimizing the amount of cool air needed, thus reducing fuel consumption.
2Temperature
If cool air streams are augmented by greater tapping from the secondary air flow to cool the regulation system, then the regulator and actuator can handle higher air temperatures, but the efficiency of the turbojet engine deteriorates
Solution Approach 1:
The cooling system applies local quality by providing cooling only to specific components (regulator and actuator) that require temperature control, rather than cooling the entire air flow path. This localized approach allows the system to handle higher air temperatures in critical areas while minimizing the impact on overall engine efficiency and secondary air flow availability.
Solution Approach 2:
The system changes the thermal parameters of the regulation components by using heat pipes to actively manage heat transfer. This allows the regulator and actuator to operate at higher temperatures without compromising their functionality, thereby enabling the engine to maintain higher efficiency while still providing adequate cooling to critical components.
3Loss of energy
If the regulation system operates without enhanced cooling, then fuel consumption is reduced, but the system cannot effectively manage increasing air temperatures from new engines
Solution Approach 1:
The heat pipe-based cooling system is designed to be self-regulating and self-service. The heat pipes automatically transfer heat from the regulator and actuator to the cooling system based on temperature differentials, without requiring external control mechanisms. This allows the system to maintain reliability at high temperatures while consuming minimal additional energy, as the cooling activation is directly coupled to the thermal load.
Solution Approach 2:
The system replaces complex mechanical cooling mechanisms with passive heat pipe technology. The heat pipes use phase change and capillary action to transfer heat without moving parts, eliminating the need for additional fans, pumps, or complex control systems that would increase fuel consumption. This substitution maintains system reliability at high temperatures while minimizing energy penalties.
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
The system effectively reduces the temperature of air entering the regulator and actuator without increasing cool air consumption, ensuring optimal operation and maintaining turbojet engine efficiency even with higher air temperatures.
Implementation Method 1
at least one heat pipe, each heat pipe comprising a first end in contact with the outer radiator and a second end housed in the housing
Implementation Method 2
heat pipes to transfer heat from the regulator and actuator to an outer radiator
Implementation Method 3
an outer radiator subjected to an air stream
Data Source
AI summary
A regulation system to regulate the flow rate of a hot air duct which comprises a shutter, an upstream air intake, a downstream air intake, a regulator and an actuator of the shutter with a first inlet connected to an outlet of the regulator and a cooling system comprising an outer radiator, a housing and a heat pipe housed in the housing and discharging the heat between the housing and the outer radiator, wherein the air streams coming from the upstream air intake and from the downstream air intake pass through the housing. Such a regulation system allows a better discharging of the heat by the action of the heat pipes.