Aerogel Composite Spacer for Thermally Insulated Pipe-in-Pipe
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Solution Overview
Problem
Subsea pipe-in-pipe systems face challenges in maintaining thermal insulation while withstanding mechanical loads, as traditional spacers often compromise between thermal insulation and mechanical strength, leading to significant heat loss and potential pipeline plugging due to wax and hydrate deposition.
Innovation Solution
Aerogel particles are dispersed in a polymer matrix to form a thermally-efficient spacer, which is moulded and cured to create a component that maintains mechanical strength while minimizing heat transfer through its convoluted heat flow paths, reducing thermal conductivity without compromising mechanical integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional solid spacer materials are used to maintain mechanical strength, then the spacer can withstand mechanical loads, but thermal insulation performance deteriorates due to high thermal conductivity
Solution Approach 1:
The patent applies composite materials by combining polymer matrix with hollow spherical fillers (such as microbeads, glass beads, or foam spheres) to create a spacer material that integrates both structural support and thermal insulation functions. The hollow spherical structure provides mechanical strength while the air-filled cavities within the spheres provide thermal insulation, resolving the contradiction between strength and heat loss.
Solution Approach 2:
The patent utilizes porous materials through the incorporation of hollow spherical fillers containing air or gas voids. These porous structures reduce thermal conductivity by introducing air pockets that impede heat transfer, while the spherical geometry and polymer matrix maintain the mechanical integrity needed to support the pipe structure.
2Loss of energy
If thicker insulation is used to reduce heat loss, then thermal insulation performance improves, but the diameter of the inner pipe must be reduced or outer pipe diameter increased, adding weight and complexity
Solution Approach 1:
The patent changes the thermal conductivity parameter of the spacer material by incorporating hollow spherical fillers, which dramatically reduce heat transfer through the spacer. This allows the spacer to provide both structural support and enhanced thermal insulation without increasing the overall pipe diameter or weight, as the insulation property is improved at the material level rather than requiring increased thickness.
3Strength
If solid spacer material is used to maintain structural integrity, then mechanical strength is maintained, but thermal conduction paths are created between inner and outer pipes
Solution Approach 1:
The composite material structure with hollow spherical fillers creates a discontinuous thermal path through the spacer. The air-filled spheres act as thermal barriers that interrupt conduction paths, while the polymer matrix binding the spheres maintains structural continuity and integrity. This resolves the contradiction by providing both mechanical strength and thermal insulation effectiveness simultaneously.
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 solution significantly reduces heat loss in pipe-in-pipe systems by utilizing aerogel particles embedded in a polymer matrix, maintaining mechanical strength while enhancing thermal insulation, thus preventing pipeline plugging and optimizing operational conditions.
Implementation Method 1
Aerogel particles are dispersed in a polymer matrix to form a thermally-efficient spacer, which is moulded and cured to create a component that maintains mechanical strength while minimizing heat transfer through its convoluted heat flow paths
Data Source
AI summary
A method manufacturing a spacer for a pipe-in-pipe system includes mixing aerogel particles with a polymer to form a mixture in which the particles are dispersed in the polymer. The resulting mixture is moulded and the polymer is solidified to form the spacer or a component of the spacer, in which the dispersed, particles are suspended in a matrix of the solidified polymer.