Aerogel-PIR Insulation Assembly for Durable Roofing Thermal Barriers
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Solution Overview
Problem
Existing silica aerogels are fragile and easily damaged during roofing applications, limiting their use in building insulation, particularly in roofing and construction.
Innovation Solution
A composite insulation assembly with a three-layer design, featuring a silica aerogel layer sandwiched between two protective insulation layers, such as polyisocyanurate (PIR) or gypsum board, to enhance durability and usability in roofing and construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If silica aerogel is used for insulation, then thermal insulation performance is improved, but mechanical strength and durability deteriorate
Solution Approach 1:
The patent creates a composite material by integrating silica aerogel particles into a polyisocyanurate foam matrix. The aerogel provides exceptional thermal insulation with thermal conductivity as low as 0.015 W/m·K, while the polyisocyanurate binder provides mechanical strength and structural integrity, resolving the contradiction between insulation performance and durability
Solution Approach 2:
The patent utilizes the porous structure of silica aerogel, which has porosity exceeding 90%, to achieve superior thermal insulation. The porous network traps air molecules and minimizes heat transfer through conduction, convection, and radiation, while the overall composite structure maintains mechanical strength through the polyisocyanurate framework
2Loss of energy
If pure silica aerogel is used, then thermal conductivity is reduced, but ease of operation and installation deteriorate
Solution Approach 1:
The patent combines fragile silica aerogel with flexible polyisocyanurate foam to create a composite that is both easy to handle and install while maintaining low thermal conductivity. The foam matrix provides flexibility and durability, allowing the material to be easily cut, shaped, and installed in various building applications
Solution Approach 2:
The patent modifies the physical and chemical parameters of the aerogel by incorporating it into a foam structure, changing it from a fragile monolithic form to a flexible composite material. This parameter change includes modifying the density distribution, mechanical properties, and processability while preserving the low thermal conductivity characteristic
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 composite design protects the silica aerogel layer, making it suitable for roofing and construction applications by enhancing durability and maintaining excellent thermal insulation properties.
Implementation Method 1
They have extremely low densities and very low thermal conductivity (due to the large volume of gases trapped in the aerogel comprising the majority of the physical structure)
Data Source
AI summary
A composite insulation assembly, including: (a) a bottom insulation layer, (b) a fiber supported aerogel blanket on top of the bottom insulation layer; and (c) a top insulation layer.