Compressed Insulation System for Thermal Resistance
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Solution Overview
Problem
Current insulation technologies face challenges in achieving high thermal performance while maintaining cost-effectiveness, as high-density insulation materials like closed cell foams are expensive and require significant volume, while lower-density options like fiberglass require more material to meet energy efficiency standards, leading to limitations in insulation effectiveness and increased logistic and manipulation difficulties.
Innovation Solution
A system and method involving a container with a first insulation material layer and a second expanding insulation material layer that compresses the first layer, achieving a high thermal resistance and reduced density through the expansion of the second layer, allowing for efficient insulation installation and meeting energy code requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed cell foam is used for insulation, then thermal performance and airtightness are improved, but cost increases significantly
Solution Approach 1:
The insulation system is divided into two distinct layers: a first layer of open cell foam providing airtightness, and a second layer of fiberglass providing insulation. This segmentation allows each material to perform its optimal function without requiring the use of expensive closed cell foam throughout the entire assembly, thereby reducing cost while maintaining thermal performance.
Solution Approach 2:
Different materials are used in different locations within the insulation assembly. The first layer (open cell foam) is positioned where airtightness is critical, while the second layer (fiberglass) is positioned where bulk insulation is needed. This local optimization allows the system to achieve high thermal performance without uniformly using expensive materials throughout.
2Ease of manufacture
If open cell foam is used for insulation, then cost is reduced, but volume required increases to achieve equivalent airtightness and insulation
Solution Approach 1:
The insulation assembly is segmented into two functional layers: open cell foam for airtightness and fiberglass for insulation. This segmentation allows the open cell foam to be used in a thinner section where it excels at sealing, rather than requiring a thick layer throughout, thereby reducing total volume while maintaining cost-effectiveness.
Solution Approach 2:
The system uses a composite structure combining two different insulation materials (open cell foam and fiberglass) in a single assembly. This composite approach allows the thinner, less voluminous open cell foam to work synergistically with the fiberglass layer, achieving the required airtightness and insulation performance in a more compact package than open cell foam alone would require.
3Reliability
If high-density insulation material is used, then thermal conductivity is improved, but manufacturing speed decreases
Solution Approach 1:
The system uses different materials with different density characteristics in different layers. The fiberglass layer provides the necessary thermal performance through its structure and composition rather than relying solely on high density, allowing for faster installation compared to compressing high-density materials while still achieving low thermal conductivity.
Solution Approach 2:
The invention changes the approach to achieving low thermal conductivity by not relying on high density alone. Instead, it uses the specific properties of fiberglass (R11-R15 per inch) and open cell foam in a layered configuration, allowing manufacturers to work with materials at their optimal densities without excessive compression, thereby maintaining manufacturing speed while achieving the required thermal performance.
4Reliability
If R15 insulation product is used, then thermal resistance is improved, but compression capability decreases
Solution Approach 1:
The insulation system is segmented into two layers with different compression characteristics. The first layer (open cell foam) can be compressed and expanded in place to fill cavities, while the second layer (fiberglass) is installed in batts that are designed to be compressed during installation. This segmentation allows each material to be handled according to its optimal installation method, maintaining ease of operation while achieving high thermal resistance.
Solution Approach 2:
The system changes the approach to achieving high thermal resistance by combining two materials with different R-values per inch rather than relying on a single high-R material. The fiberglass layer (R11-R15 per inch) and open cell foam layer work together to achieve the required total R-value, allowing the fiberglass to be installed in a compressible batt format that maintains ease of operation while achieving the necessary thermal performance.
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 provides an insulation product with improved thermal conductivity, acoustic properties, and density, meeting or exceeding R13 to R22 thermal resistance and 33-40 dB noise reduction, while reducing material costs and installation complexity by compressing the first layer with the second layer, thus enhancing insulation effectiveness and efficiency.
Implementation Method 1
a second insulation material forming a second layer inside the container, and the first layer is compressed by the second layer
Implementation Method 2
The code IECC2012 now requires the following standards for walls... an R20 between studs, which is achievable only with closed cell foam
Implementation Method 3
Closed cell foams give both excellent airtightness and insulation that is superior to fiberglass
Data Source
AI summary
An insulation product may include a container, a first insulation material forming a first layer inside the container, and a second insulation material forming a second layer inside the container, and the first layer is compressed by the second layer. A structure in a building may include studs, first and second claddings mounted to opposite sides of the studs, and structure spaces defined between the studs and the opposing claddings. A first insulation material may include first layers on and substantially covering a first one of the claddings inside the structure spaces. In addition, a second insulation material may have second layers inside the structure spaces. The first layers are compressed and substantially covered by the second layers, and the second layers substantially cover a second one of the claddings inside the structure spaces.