Wall Baffle System for Vertical Wall Thermal Resistance
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Solution Overview
Problem
Porous insulation materials like fiberglass and mineral wool experience reduced thermal resistance performance in vertical wall assemblies due to heat rising vertically, leading to increased heat flow and energy loss, which is exacerbated by conductive steel girts that absorb and conduct heat, making it difficult to meet energy code criteria within existing thickness constraints.
Innovation Solution
A wall baffle system comprising girt insulation blocks with downward sloping surfaces and reflective insulation panels that deflect and reflect heat back into the heated space, reducing heat flow to the outer wall by blocking upward heat flow and preventing absorption by conductive girts, using a combination of girt insulation blocks and reflective insulation panels to create a sloped surface that redirects heat energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If porous insulation materials are used in vertical wall assemblies, then thermal insulation performance is reduced due to heat rising vertically, but using thicker insulation to compensate increases device complexity and space requirements
Solution Approach 1:
The wall assembly is segmented into distinct functional layers: porous insulation material for baseline thermal resistance, reflective insulation panels for intercepting rising heat, and girt insulation blocks for blocking heat at conductive pathways. Each segment addresses a specific aspect of heat transfer, collectively resolving the overall heat loss problem without requiring excessive thickness of a single material type.
Solution Approach 2:
The solution employs composite insulation assemblies combining porous insulation materials (fiberglass, mineral wool) with reflective insulation panels and girt insulation blocks. This composite approach leverages the complementary strengths of different materials: porous materials provide bulk thermal resistance while reflective materials intercept radiant and convective heat flow, achieving superior performance without increasing overall assembly thickness excessively.
2Loss of energy
If conventional porous insulation is used without additional components, then device complexity is low, but thermal resistance performance degrades significantly in vertical assemblies due to cumulative heat flow
Solution Approach 1:
Reflective insulation panels serve as intermediary elements positioned within the wall assembly to intercept heat flow before it can accumulate and traverse the full height of the porous insulation. These panels act as mediators that redirect heat back toward the heated space, breaking the cumulative heat flow pathway and reducing overall heat loss without requiring the porous insulation to be excessively thick.
Solution Approach 2:
The solution addresses the vertical heat flow problem by introducing horizontal and multi-dimensional heat redirection pathways. Reflective panels create alternative heat flow paths that bounce heat back horizontally or upward toward the heated space, transforming the predominantly vertical heat flow into multi-directional pathways that reduce net heat loss through the wall assembly.
3Loss of energy
If insulation thickness is increased to compensate for performance degradation, then thermal resistance improves, but the assembly exceeds existing thickness constraints and cannot meet energy code criteria
Solution Approach 1:
The solution changes the thermal performance parameters by introducing reflective surfaces that alter heat transfer mechanisms. Instead of relying solely on increased thickness of porous material, the reflective panels change how heat moves through the assembly by reflecting radiant and convective heat, effectively improving thermal resistance without proportionally increasing assembly thickness.
Solution Approach 2:
The wall assembly incorporates localized high-performance elements (reflective panels and girt insulation blocks) at critical heat flow locations rather than uniformly increasing insulation thickness throughout. This local quality approach places enhanced insulation and reflective barriers where heat flow is most problematic, achieving improved thermal performance within thickness constraints by addressing hotspots rather than treating the entire assembly uniformly.
4Strength
If steel girts are used for structural support, then structural strength is provided, but heat absorption and conduction through girts increases heat loss
Solution Approach 1:
The solution extracts or isolates the heat conduction problem associated with steel girts by placing girt insulation blocks specifically at the girt locations. These blocks are positioned to wrap around or attach to the steel girts, effectively separating the structural function of the steel from its unwanted thermal conduction function, allowing the steel to provide strength while the insulation blocks prevent heat absorption and conduction.
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 wall baffle system significantly reduces heat loss through vertical walls by redirecting and reflecting heat back into the heated space, enhancing thermal resistance and helping buildings meet energy code criteria within existing thickness constraints.
Implementation Method 1
Heat rises in gasses and in liquids due to heat energy exciting the molecules in the matter, which causes the matter to expand and become less dense in the molecules above the source of heat. This lower density causes the gasses and liquids with the higher heat energy to rise as the cooler, denser molecules fall downward due to the effects of gravity
Implementation Method 2
A wall baffle system comprising girt insulation blocks with downward sloping surfaces and reflective insulation panels that deflect and reflect heat back into the heated space
Data Source
AI summary
A wall baffle system preferably includes a plurality of girt insulation blocks and a plurality of reflective insulation panels. Each girt insulation block preferably includes a contoured bottom surface, a girt cavity and a retention projection. Each reflective insulation panel includes a foil heat reflective strip and an insulation block. The foil heat reflective strip is affixed to a top or bottom of each insulation block. The girt insulation block is installed under each horizontal girt along a height of the outer wall. The plurality of reflective insulation panels are placed between a floor girt and a bottom of a girt insulation block; between a top of a horizontal girt and a bottom of a girt insulation block; or a top of a horizontal girt and a bottom of an eave girt insulation block.