Liquid Metal Cooling Return Pipe for Plasma Radiation Sources
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Solution Overview
Problem
Existing cooling systems for plasma-based radiation sources using liquid metal as a coolant face issues with corrosion, erosion, and contamination, leading to reduced system lifespan and increased maintenance needs, particularly in areas with high heat and flow stress.
Innovation Solution
A cooling system design that includes a reservoir for liquid metal with a tempering unit to maintain temperature above the melting point, a pump unit for circulation, and a straight inclined return pipe to guide heated metal back into the reservoir via gravity, minimizing erosion and contamination, along with corrosion-resistant coatings and exchangeable pipe parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If liquid metal is used as coolant in high-temperature plasma generation areas, then cooling efficiency is improved, but corrosion and erosion of pipe surfaces occur
Solution Approach 1:
A straight inclined return pipe is introduced as an intermediary component between the plasma generation area and the coolant reservoir. The pipe's straight geometry and inclination angle minimize turbulent flow and direct contact between the liquid metal coolant and pipe inner surfaces, thereby reducing corrosion and erosion while maintaining effective heat removal from the plasma source.
Solution Approach 2:
The return pipe is designed with specific geometric parameters (straight configuration and inclination angle) that change the flow characteristics of the liquid metal. By optimizing these parameters, the system achieves laminar or reduced-turbulence flow patterns that decrease mechanical erosion and chemical corrosion rates while preserving the coolant's thermal performance.
2Productivity
If liquid metal is circulated at high flow rates for effective cooling, then heat removal is improved, but erosion of pipe walls increases
Solution Approach 1:
The straight inclined return pipe serves as a mediator that allows high-flow-rate coolant circulation while minimizing direct high-velocity impact on pipe walls. The inclination and straight geometry guide the flow smoothly, reducing turbulent eddies and direct impingement that cause erosion, thus enabling high productivity without excessive wall degradation.
Solution Approach 2:
While the pipe is predominantly straight, the inclination introduces a controlled geometric feature that modifies flow patterns. This geometric optimization reduces sharp corners and abrupt direction changes that generate turbulence, thereby lowering erosion rates even at high flow rates required for effective heat removal.
3Temperature
If complex cooling circuit designs are used to manage heat, then cooling performance is improved, but system complexity and maintenance needs increase
Solution Approach 1:
The invention extracts and isolates the return pipe as a separate, simplified component with a specific straight inclined geometry. This extraction allows the rest of the cooling system to maintain simpler configurations while the return pipe independently handles the heat management function, reducing overall system complexity and easing maintenance requirements.
Solution Approach 2:
The cooling system is segmented into distinct functional components, with the straight inclined return pipe representing a dedicated segment for heat-carrying coolant return. This segmentation allows each component to be optimized independently and simplifies maintenance, as the return pipe can be inspected or replaced without affecting the entire cooling system.
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 design minimizes the impairment of metal properties due to corrosion and erosion, extends the lifespan of the cooling system, and reduces maintenance requirements by ensuring efficient heat management and purity of the liquid metal.
Implementation Method 1
Liquid metal has the advantage of very good heat conductivity
Implementation Method 2
liquid metal has electromagnetic properties so that the pumps that are required for generating a flow of coolant can be small and can be implemented without moving parts and external to the coolant
Implementation Method 3
the return pipe from the source module to the reservoir is formed as a straight inclined pipe at a gradient relative to the reservoir in order to guide the heated metal into the reservoir by the action of gravity in substantially laminar flow
Data Source
AI summary
An arrangement for handling a liquid metal for cooling revolving components of a radiation source based on a radiation-emitting plasma has the handling arrangement for the liquid metal comprises a reservoir of liquid metal in a vessel, a tempering device for adjusting the temperature moderately above the melting point of the metal, a pump unit for moving the liquid metal in circulation. The handling unit containing the reservoir and the pump unit is provided for transporting the metal into a separated source module via a feed pipe and a return pipe for guiding highly heated metal back from the source module into the reservoir. The return pipe is formed as a straight pipe slightly inclined to the reservoir to guide the heated metal back by action of gravity in a substantially laminar flow.