Spectrally Selective Radiation Emission Device for Thermal Management
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Solution Overview
Problem
Mobile computing devices face limitations in performance due to temperature constraints, as reducing heat generation to prevent damage also reduces available functionality, and conventional cooling methods either absorb or reflect all electromagnetic radiation, failing to effectively manage heat while protecting internal components.
Innovation Solution
A spectrally selective radiation emission device is integrated into the device's housing, emitting heat as specific wavelengths of electromagnetic energy while reflecting other wavelengths, thereby cooling the device and protecting it from external heat sources like sunlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If power consumption is reduced to maintain safe temperature limits, then temperature is controlled, but device performance deteriorates
Solution Approach 1:
The patent changes the thermal emission parameters of the device housing by applying a spectrally selective coating that emits radiation in the 8-13 micrometer wavelength range. This allows the housing to actively radiate heat at temperatures below 100°C, enabling the device to maintain safe operating temperatures without reducing power consumption or performance.
Solution Approach 2:
The patent replaces conventional passive cooling methods (such as heat sinks and fans) with a radiative cooling mechanism based on selective electromagnetic radiation emission. This substitution enables heat dissipation through thermal radiation in the atmospheric window region, allowing effective cooling without mechanical moving parts or active cooling systems that would consume additional power.
2Loss of energy
If conventional cooling methods are used, then heat is dissipated, but all electromagnetic radiation is absorbed or reflected, failing to protect from external heat sources
Solution Approach 1:
The patent applies spectrally selective properties to specific regions of the electromagnetic spectrum. The housing coating is designed to emit radiation selectively in the 8-13 micrometer atmospheric window region while maintaining different optical properties at other wavelengths. This local quality differentiation in spectral response enables simultaneous heat dissipation in the infrared region and reflection/absorption management in the visible and ultraviolet regions, protecting the device from external heat sources like sunlight.
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 allows for effective heat dissipation without compromising device functionality, maintaining safe temperatures and reducing heat transfer to the user, while also protecting the device from external heating sources.
Implementation Method 1
The spectrally selective radiation emission device is configured to emit thermal radiation at one or more wavelengths in an atmospheric radiation window region
Implementation Method 2
reflect radiation at one or more other wavelengths of electromagnetic energy
Data Source
AI summary
A spectrally selective radiation emission device is described. In one or more implementations, an apparatus includes a housing, one or more electrical components disposed within the housing, and a spectrally selective radiation emission device. The one or more electrical components are configured to generate heat during operation. The spectrally selective radiation emission device is disposed on the housing and configured to emit radiation when heated by the one or more electrical components at one or more wavelengths of electromagnetic energy and reflect radiation at one or more other wavelengths of electromagnetic energy.