Thermal Radiator Shutter With Adjustable View Factor for Space Heat Control
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Solution Overview
Problem
Existing thermal control systems for extreme space and lunar environments are costly, complex, and risky, and fail to provide efficient temperature management for components with different temperature requirements, especially in low-cost, low-mass micro-rover platforms.
Innovation Solution
A thermal radiator shutter with moveable baseplates that form a closed thermal loop for heat retention and an open configuration for heat dissipation, using radiators with adjustable view factors and insulative materials to manage temperature extremes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radioactive heating elements or sophisticated active thermal control systems are used, then thermal control performance is improved, but system cost, mass, and complexity increase
Solution Approach 1:
The system divides the thermal control function into multiple independent radiators that can be individually positioned and controlled. Each radiator serves a specific thermal zone, allowing independent optimization without requiring a complex centralized system.
Solution Approach 2:
The radiators are made movable rather than fixed, allowing dynamic adjustment of their positions and orientations. This enables the system to adapt to changing thermal requirements without complex active control mechanisms, achieving thermal management through passive geometric reconfiguration.
2Adaptability or versatility
If multiple thermal zones are created in a compartment, then temperature requirements of different components are satisfied, but system complexity increases
Solution Approach 1:
The compartment is divided into multiple thermal zones, each served by its own dedicated radiator. This segmentation allows each zone to be independently controlled to meet specific temperature requirements without requiring a complex centralized thermal management system.
Solution Approach 2:
Each thermal zone is optimized with a radiator specifically positioned and sized for that local thermal requirement. This local optimization approach allows different parts of the compartment to have different thermal characteristics without requiring complex global control mechanisms.
3Productivity
If radiators are positioned to maximize heat rejection to space, then thermal control efficiency is improved, but view factor to each other increases reducing heat retention capability
Solution Approach 1:
The radiators are made movable so their relative positions can be dynamically adjusted. During lunar day operations, radiators can be positioned to maximize heat rejection to space. During lunar night, they can be repositioned to face each other for radiative heat exchange and retention, achieving both objectives at different times without compromise.
Solution Approach 2:
The system uses periodic reconfiguration of radiator positions synchronized with the lunar day-night cycle. During the day, radiators are oriented for maximum heat rejection; during the night, they are repositioned for heat retention through mutual radiative coupling, exploiting the periodic environmental conditions.
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
Provides efficient, cost-effective, and reliable thermal control with reduced mass, volume, and complexity, maintaining components within operational temperature ranges and minimizing power consumption.
Implementation Method 1
When the second baseplate is in the closed position the second radiator faces the first radiator to provide radiative coupling, creating a thermal loop where heat flows between the first and second baseplates
Implementation Method 2
When the second baseplate is in the open position the first and second radiators have a greater view factor to a surrounding environment than in the closed position for rejecting heat from the first and second temperature-controlled components
Implementation Method 3
using radiators with adjustable view factors and insulative materials to manage temperature extremes
Data Source
AI summary
A thermal radiator shutter and methods of providing thermal control by and manufacturing a thermal radiator shutter are provided. The thermal radiator shutter includes a first baseplate, a second baseplate that is moveable between an open and closed position, and an actuator for moving the second baseplate. When the second baseplate is in the closed position a radiator on the second baseplate faces a radiator on the first baseplate to provide radiative coupling and heat flow between the baseplates. When the second baseplate is in the open position, the respective radiators have a greater view factor to the surrounding environment than in the closed position and a reduced view factor to each other compared to the closed position. The respective radiators reject heat from temperature-controlled components on the first and second baseplates when the second baseplate is in the open position.