Segmented Thermal Shutter Array for Directional Emission Control
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Solution Overview
Problem
Current thermal management systems, such as louvers, are large, heavy, and inefficient, limiting their ability to dynamically adjust thermal impedance and directionality, which is crucial for high-performance aerospace equipment operating in dynamic thermal environments.
Innovation Solution
A thermal management system utilizing a segmented array with independently controlled shutter elements movable about orthogonal axes, which change the dimension of gaps between shutter elements to control thermal radiation, thereby dynamically adjusting thermal impedance and directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional louver systems are used for thermal management, then thermal impedance control is provided, but the system size, weight, and complexity increase significantly
Solution Approach 1:
The system divides the thermal control surface into multiple independently controllable shutter elements arranged in a segmented array. Each shutter element can be independently actuated to control thermal radiation, replacing the monolithic louver structure with modular segments that reduce overall system complexity while maintaining thermal control functionality
Solution Approach 2:
The patent replaces traditional mechanical louver systems with multiple moving parts and bearings with a segmented shutter array that uses simplified actuation mechanisms. Each shutter element employs a straightforward hinge and actuator configuration, eliminating the complex mechanical linkages and bearing systems required by conventional louvers
2Adaptability or versatility
If traditional louver systems are used, then some thermal control is achieved, but the ability to dynamically adjust thermal impedance is limited to approximately a factor of 6
Solution Approach 1:
The system implements dynamic thermal control by enabling each shutter element to be independently actuated between open and closed positions. This allows real-time adjustment of the effective emissive area, providing continuous dynamic control of thermal impedance with an adjustment range exceeding a factor of 10, compared to the limited factor of 6 range in traditional louvers
Solution Approach 2:
Different regions of the thermal control surface can be independently adjusted by controlling individual shutter elements. This allows localized thermal management where specific areas can be opened or closed based on local thermal requirements, enhancing overall adaptability and control precision
3Adaptability or versatility
If traditional louver systems are used, then thermal control in a single direction is provided, but the system cannot adapt to dynamic thermal environments from multiple directions
Solution Approach 1:
The patent transitions from single-axis louver rotation to multi-axis shutter element movement. Each shutter element can rotate about a hinge axis and tilt about a pivot axis, creating two-dimensional control capability. This allows the system to direct thermal radiation control in multiple directions simultaneously, adapting to dynamic thermal environments from various angles
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 achieves a >10× change in thermal impedance and full 360° control over the direction of thermal emission, significantly improving thermal management capabilities compared to traditional louver systems.
Implementation Method 1
a thermally conductive base layer in contact with the component, with the base layer including a thermally emissive surface
Implementation Method 2
a thermally conductive base layer in contact with the component
Data Source
AI summary
The present disclosure relates to a method for controlling thermal radiation from a component. The method involves arranging a thermally conductive base layer in contact with the component, the base layer including a thermally emissive surface. A plurality of independently controlled shutter elements are movable about at least two orthogonal axes, and between closed and open positions, to change a dimension of a gap separating edges of adjacent ones of the shutter elements. The movements of the shutter elements are controlled about the two orthogonal axes to control the dimensions of the gaps to control thermal radiation emitted through the gaps.