Thermally Broken Air Handling Chamber for Condensation Control
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Solution Overview
Problem
Conventional air handling chambers face issues with condensation formation on exterior surfaces due to thermal bridging and leakage, which can lead to contamination in sensitive environments like food processing facilities, and they lack effective thermal isolation and structural integrity.
Innovation Solution
The design features a thermally broken structure with a gap between the inner and outer walls, filled with insulation, and a staggered seam arrangement to increase thermal resistance and leak resistance, using non-metallic materials for improved thermal isolation and structural support, and thermally breaking appendages and penetrations to prevent heat conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional modular panel design with metallic shell is used, then structural strength is improved, but thermal bridging occurs causing condensation on exterior surfaces
Solution Approach 1:
The wall structure is segmented into three distinct layers: interior shell, insulation layer, and exterior shell, separated by gaps to break thermal bridges. This segmentation prevents continuous heat conduction paths while maintaining structural integrity through distributed support.
Solution Approach 2:
A low-conductivity material is introduced as an intermediary between the interior and exterior shells to replace high-conductivity metallic bridges. This intermediary material blocks thermal bridging while allowing structural load transfer through alternative paths.
2Object-affected harmful factors
If insulation material is exposed on panel edges to reduce thermal bridging, then condensation is reduced, but sealing becomes difficult and air leakage increases
Solution Approach 1:
Different regions of the wall structure have different properties: the interior and exterior shells provide structural strength and sealing surfaces, while the insulating material in between provides thermal isolation. The metallic shells at edges provide both structural support and sealed mating surfaces, while the insulation fills the gap to prevent thermal bridging.
3Strength
If base structure forms thermal bridge for rigidity, then structural support is improved, but condensation forms on base exterior
Solution Approach 1:
The base structure is segmented into an interior base structure and an exterior base structure separated by a low-conductivity material layer. This segmentation breaks the thermal bridge while maintaining rigidity through the distributed structural system.
4Object-affected harmful factors
If thicker insulation is used to prevent condensation, then thermal isolation is improved, but wall thickness and chamber size increase
Solution Approach 1:
The wall structure uses different materials with different thermal conductivities in different regions. The interior and exterior shells use high-strength, low-conductivity materials to provide both structural support and thermal isolation, reducing the required thickness of the insulating layer while maintaining effective thermal break.
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 design effectively prevents exterior condensation, enhances thermal efficiency, reduces noise, and allows for chambers of various sizes without compromising thermal and flow containment, while using lower conductivity insulation materials for improved performance.
Implementation Method 1
The gap is filled with an insulation material to thermally isolate the interior of the chamber from the exterior wall
Implementation Method 2
Heat flux through a solid medium, expressed in Watts per square meter, is directly proportional to the thermal conductivity of the medium (hereinafter referred to as k) and inversely proportional to the thermal path length (hereinafter referred to as L). That is, heat flux is proportional to the ratio k/L
Data Source
AI summary
An air chamber for the housing of air handling components including an interior shell surrounded by an exterior shell, the shells being separated by materials of relatively low thermal conductivity. The interior shell is peripherally mounted on an interior base. The interior base is disposed within an exterior base that supports the exterior shell. A structural thermal insulation material is disposed interstitially between the interior and exterior bases and the interior base and interior shell are thermally isolated from the exterior base and exterior shell.