Heat Pipe Non-Condensable Gas Protrusion Thermal Control
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Solution Overview
Problem
Conventional heat pipes with vacuum environments fail to operate effectively at low temperatures of heat-generating electronic components, leading to inefficient heat dissipation and reduced work efficiency.
Innovation Solution
A heat pipe design incorporating a non-condensable gas and protrusions on the exothermal side, which reduces thermal conduction efficiency at low temperatures, preventing operation until the component reaches a higher temperature, thereby optimizing heat dissipation efficiency within a specific working range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the heat pipe is filled with a non-condensable gas, then the heat pipe does not operate at low temperatures and starts operating at high temperatures, but the thermal conduction efficiency of the heat pipe is reduced
Solution Approach 1:
The patent introduces a non-condensable gas into the heat pipe to change the thermal parameters of the internal environment. This gas prevents the heat pipe from operating at low temperatures by interfering with the phase change process, while allowing operation at high temperatures when the temperature gradient overcomes the gas resistance, thus achieving temperature-range adaptability at the cost of reduced thermal conduction efficiency.
Solution Approach 2:
The non-condensable gas creates an inert atmosphere inside the heat pipe that inhibits the normal phase change operation at low temperatures. This inert environment prevents unwanted heat conduction when the electronic component is cold, while still permitting heat dissipation operation when the component reaches high temperatures, thereby controlling the operational temperature range.
2Adaptability or versatility
If the exothermal side has protrusions to reduce contact area with the radiator, then the heat pipe operates at a specific working temperature range, but the heat dissipation efficiency is reduced
Solution Approach 1:
The exothermal side of the heat pipe is designed with protrusions that create non-uniform contact areas with the radiator. This local structural modification reduces heat conduction efficiency at specific contact points, thereby preventing excessive heat dissipation at low temperatures and enabling the heat pipe to operate effectively only within a specific high-temperature working range.
3Speed
If the heat pipe operates at high thermal conduction efficiency, then the electronic component is cooled quickly, but the electronic component cannot reach the appropriate working temperature in cold environments
Solution Approach 1:
The non-condensable gas is introduced to create a preliminary resistance against heat conduction that prevents the electronic component from being cooled too quickly in cold environments. This anti-action allows the component to reach its required working temperature, while the system still maintains the capability for rapid heat dissipation when the temperature becomes high.
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 heat pipe operates only at higher temperatures, ensuring efficient heat dissipation and maintaining the electronic component's work efficiency by controlling thermal conduction efficiency, thus enhancing the practicality of heat management.
Implementation Method 1
the heat pipe can lower the conduction efficiency of the heat pipe by the non-condensable gas and protrusion
Implementation Method 2
the heat pipe provides an internal vacuum environment filled with a working fluid and produces a phase change when the working fluid is heated
Implementation Method 3
the heat produced by the electronic component may be absorbed by the evaporating end surface of the heat pipe
Implementation Method 4
the exothermal side can reduce the contact area with the radiator by the protrusion, and the heat pipe can lower the conduction efficiency by the non-condensable gas and protrusion
Implementation Method 5
After the working fluid is cooled, the working fluid returns to its liquid state and backflows for recycle and reuse
Data Source
AI summary
A heat pipe with a non-condensable gas includes a thermal conductor, and a working fluid and a non-condensable gas filled into a hollow chamber of the thermal conductor, and the thermal conductor has a heat-absorbing side attached to a heat-generating electronic component and an exothermal side attached to a radiator, and the exothermal side has at least one protrusion, and the exothermal side with the protrusion can reduce the contact area with the radiator, and the heat pipe lowers the conduction efficiency by the non-condensable gas and the protrusion, so as to achieve a work efficiency of the heat-generating electronic component in an operation within a working temperature range.