Acetylated Wood Facade Profiles for Thermal Bridging
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Solution Overview
Problem
Current prefabricated glazed building block facades with aluminum profiles have high heat transfer coefficients and ecological concerns due to aluminum mining and processing, necessitating an alternative that reduces thermal bridging and environmental impact.
Innovation Solution
A wood or paper-based static load-bearing profile with a moisture-resistant material, such as acetylated wood, is used in conjunction with a drainage and condensation space to prevent moisture accumulation, integrated through lamination or gluing with a transparent or opaque infill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aluminum profiles are used in prefabricated glazed building block facades, then structural integrity and load-bearing capacity are achieved, but heat transfer coefficient U increases and environmental impact worsens
Solution Approach 1:
The patent applies composite materials by combining wood or paper-based load-bearing parts with moisture-resistant materials (such as acetylated wood) in a multi-layer structure. This composite construction replaces aluminum profiles while maintaining structural integrity through the load-bearing wood component and improving thermal insulation through the moisture-resistant layer, thereby reducing heat transfer coefficient U without sacrificing strength.
Solution Approach 2:
The patent changes the material parameters from aluminum to wood/paper-based materials with specific moisture-resistant properties. By selecting materials with lower thermal conductivity and appropriate moisture resistance characteristics, the solution achieves both structural adequacy and reduced heat transfer, addressing the contradiction between strength and energy loss.
2Strength
If aluminum profiles are used in prefabricated glazed building block facades, then structural integrity is achieved, but ecological impact worsens due to mining and processing
Solution Approach 1:
The patent changes the material origin from mined aluminum to renewable wood or paper-based materials. This parameter change in material source fundamentally reduces the ecological impact associated with aluminum mining and processing while maintaining the required structural integrity through proper material selection and composite construction.
Solution Approach 2:
The use of composite materials consisting of wood or paper-based load-bearing parts combined with moisture-resistant materials provides an environmentally friendly alternative to aluminum. This composite approach maintains structural performance while eliminating the harmful ecological effects of aluminum extraction and manufacturing.
3Object-affected harmful factors
If wood or paper-based profiles are used, then ecological impact is reduced, but moisture resistance deteriorates
Solution Approach 1:
The patent employs composite materials where wood or paper-based load-bearing parts are combined with moisture-resistant materials (such as acetylated wood) in a multi-layer structure. This composite construction maintains the ecological benefits of renewable materials while achieving the required moisture resistance through the protective properties of the moisture-resistant layer.
Solution Approach 2:
The patent applies local quality by assigning different functional properties to different layers of the composite structure. The wood or paper-based material provides structural function and ecological sustainability, while the moisture-resistant material (acetylated wood) provides protection against moisture. This localized functional differentiation resolves the contradiction between ecological impact and moisture resistance.
4Reliability
If moisture-resistant material is added to protect wood from moisture, then durability is improved, but device complexity increases
Solution Approach 1:
The patent uses composite materials where the moisture-resistant material (such as acetylated wood) is integrated directly with the wood or paper-based load-bearing part through lamination or gluing. This integration creates a compact multi-layer structure that improves durability against moisture while minimizing the increase in structural complexity through efficient material combination.
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 solution effectively reduces heat transfer and minimizes ecological impact by using sustainable materials, enhancing the durability and environmental sustainability of glass facades while maintaining structural integrity.
Implementation Method 1
protect wood or paper-based facade beams from moisture by using moisture-resistant material, e.g. acetylized wood in the place of condensation chambers
Implementation Method 2
The load-bearing part 1 and the resistant part 2 are joined by lamination, glueing or other method to form a compact whole
Data Source
Figure 1
Figure 2
AI summary
The aim of the technical solution according to this technical solution is to protect wood or paperbased facade beams from moisture by using a moisture-resistant material, e.g. acetylized wood in the place of condensation chambers.