Retrofit Thermal Break Cap for Window Frame Insulation
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Solution Overview
Problem
Existing window retrofit solutions focus primarily on improving the thermal insulating properties of window panes while neglecting the aluminum frames, which are significant heat conductors, leading to inefficient energy retention in buildings.
Innovation Solution
A retrofit thermal break system featuring a cap made from a material with lower thermal conductivity than aluminum, which is installed over the existing window frame to enhance insulation by trapping air and providing a higher insulation value when combined with the window retrofit system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a retrofit window system is installed without addressing the frame, then the window pane insulation is improved, but the overall thermal insulation remains insufficient due to heat conduction through the aluminum frame
Solution Approach 1:
The thermal break cap is nested within the retrofit window system, fitting over the existing aluminum frame and integrating with the window assembly. This nested structure allows the thermal break component to be incorporated without requiring complete frame replacement, reducing overall system complexity while improving insulation.
Solution Approach 2:
The thermal break cap acts as an intermediary component between the conductive aluminum frame and the interior space. It mediates the thermal transfer by introducing a low-conductivity material layer that breaks the direct thermal path, thereby reducing heat loss without requiring fundamental changes to the existing window structure.
2Strength
If aluminum frames are used for existing windows, then structural strength and durability are maintained, but thermal insulation performance deteriorates due to high thermal conductivity
Solution Approach 1:
The thermal break cap utilizes composite material construction, combining rigid structural elements with insulating materials of low thermal conductivity. This composite approach maintains the structural strength needed for frame support while introducing thermal break properties that reduce heat conduction through the frame assembly.
Solution Approach 2:
The thermal break cap applies local quality improvement by targeting specific high-heat-loss areas of the frame structure. Rather than replacing the entire aluminum frame, the cap is applied to critical sections where thermal bridging occurs, providing localized thermal insulation while preserving the overall structural integrity of the aluminum frame.
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 improves the thermal insulation of existing windows by reducing heat conductivity through the frame, leading to enhanced energy retention and reduced energy loss in buildings.
Implementation Method 1
The layer has a significantly lower thermal conductivity as compared to the aluminum frame it covers
Implementation Method 2
The cap 40 also has inner surfaces 46, 48 and protrusions 54 that extend outward as shown in FIGS. 2 and 3. The protrusions 54 form a mating surface 60FIG. 2. The protrusions 54 are intended to separate the cap 40 thermally from the existing frame 18 by trapping air between the inner surfaces 46, 48 and their corresponding exposed surfaces 28, 30.
Data Source
AI summary
A thermal window system is provided where a cap is placed over an existing window frame. A top groove and a bottom groove are attached, along with side stops. A thermal window pane has a sash that surrounds another window pane. The sash fits into the top and bottom groove and overlays the side stops. The sash is held tightly to the side stops using magnetic attraction.