Heat Pipe Thermal Management for Optical Transceivers
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Solution Overview
Problem
The existing heat management systems for optical and optoelectronic devices, particularly transceivers, face challenges with high power consumption and complexity due to the use of active cooling elements like thermoelectric coolers (TECs), which generate heat and increase size, limiting their efficiency and compactness in high-performance applications.
Innovation Solution
A heat control system utilizing a substantially planar heat pipe type assembly that combines thermal conductivity and phase transition, positioned in thermal connection with active cooling components, reduces thermal impedance and power consumption by efficiently dissipating heat without the need for external power, allowing for compact and reliable operation across varying temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If active cooling devices like thermoelectric coolers (TECs) are used to remove heat from optical and optoelectronic devices, then heat removal effectiveness is improved, but power consumption increases and device size increases
Solution Approach 1:
The patent replaces the active mechanical cooling system (TEC requiring electrical power) with a passive thermal management system using heat pipes and vapor chambers. These passive devices use phase change mechanisms rather than electrical power to achieve heat transfer, thereby resolving the contradiction between effective heat removal and power consumption.
Solution Approach 2:
The patent extracts the active cooling component (TEC) from the system and replaces it with passive thermal management elements. By removing the power-consuming active cooling device and using only passive heat dissipation structures, the system achieves effective heat removal without the penalty of high power consumption.
2Temperature
If active cooling devices like thermoelectric coolers (TECs) are used to remove heat from optical and optoelectronic devices, then heat removal effectiveness is improved, but device size increases
Solution Approach 1:
The patent substitutes bulky active cooling mechanisms with compact passive thermal management structures. Heat pipes and vapor chambers provide efficient heat transfer in a much smaller footprint compared to active cooling systems, resolving the contradiction between heat removal effectiveness and device size.
Solution Approach 2:
The patent employs thin-film heat spreaders and compact heat pipe structures that provide effective thermal management in a minimal volume. These thin-film and compact structures replace bulky active cooling devices, achieving effective heat removal without increasing device size.
3Device complexity
If traditional passive thermal dissipation is used, then device complexity is reduced, but heat removal capability is insufficient for high-performance systems
Solution Approach 1:
The patent changes the thermal management approach from simple passive conduction to phase-change-based heat pipes. By utilizing phase change (liquid-vapor transition) rather than simple thermal conduction, the system achieves superior heat removal capability while maintaining relative simplicity, as the phase change mechanism provides high heat transfer coefficients without complex active control.
Solution Approach 2:
The patent directly applies phase transition mechanisms through heat pipes and vapor chambers. These devices utilize the liquid-vapor phase change cycle to transport heat efficiently from hot spots to heat sinks, providing high heat removal capability through a relatively simple passive structure that requires no external power or complex control systems.
4Temperature
If thermoelectric coolers (TECs) are used for temperature stabilization, then temperature control is improved, but the TEC itself generates heat and increases power consumption
Solution Approach 1:
The patent removes the TEC-based active cooling system that generates harmful heat as a byproduct. By replacing it with passive heat pipes and vapor chambers, the system eliminates the source of additional heat generation, as these passive devices merely transfer heat without generating extra thermal energy through electrical resistance or mechanical operation.
Solution Approach 2:
The patent substitutes the TEC (an electromechanical device that generates heat through electrical resistance) with passive thermal conduction and phase change devices. This substitution eliminates the harmful heat generation associated with electrical power consumption, as the passive heat pipes only move existing heat without generating additional thermal energy.
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 significantly reduces power consumption and size while maintaining effective temperature control, enabling efficient heat removal and stabilization in optical and optoelectronic devices, particularly in high-performance transceivers, with the heat pipe assembly acting as both a thermal and mechanical supporting structure.
Implementation Method 1
a heat transfer assembly which is a substantially planar two dimensional vessel that combines both thermal conductivity and phase transition
Implementation Method 2
a heat transfer assembly which is a substantially planar two dimensional vessel that combines both thermal conductivity and phase transition
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A system for heat removal in optical and optoelectronic devices and subassemblies 300, 400, 500, 600 is provided. The system lowers the power consumption of one or more active cooling components 308, 316, 408, 504 within the device or subassembly 300, 400, 500, 600. For any particular application, the system more efficiently removes the heat from the active cooling components 308, 316, 408, 504 by using a heat transfer assembly 310, 404, 506. The heat transfer assembly 310, 404, 506 employs properties like, but not limited to, phase transition change and thermal conductivity to move heat without external power. In some embodiments, the heat transfer assembly 310, 404, 506 can be used to allow the active cooling component 308, 316, 408, 504 to be removed, leaving the heat transfer assembly 310, 404, 506 to remove the heat from the device or subassembly 300, 400, 500, 600.