Thermal-Insulation Container With Differentiated Wall Heat Transfer Coefficients
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Solution Overview
Problem
Existing thermal-insulation containers do not effectively protect against anisotropic heat flux densities, particularly at the lid and bottom regions, leading to inadequate thermal insulation performance.
Innovation Solution
The thermal-insulation container is designed with varying heat transfer coefficients for its walls, where the lid has a lower heat transfer coefficient than the bottom and side walls, and incorporates vacuum insulation panels and a pedestal to minimize direct contact with the ground, optimizing thermal insulation by using materials with lower thermal conductivity and emission coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all walls have the same heat transfer coefficient, then the container structure is simple and uniform, but the thermal insulation performance is insufficient especially in regions with high heat flux density
Solution Approach 1:
The patent applies different heat transfer coefficients to different parts of the container walls based on their specific thermal insulation requirements. The lid and bottom walls have a first heat transfer coefficient optimized for regions with high heat flux density from solar radiation and ground contact, while side walls have a second, higher heat transfer coefficient. This local differentiation resolves the contradiction by improving overall thermal insulation performance without requiring complete redesign of the entire container structure.
2Object-affected harmful factors
If the lid and bottom have lower heat transfer coefficients, then heat input from solar radiation and ground contact is reduced, but the structural design becomes more complex
Solution Approach 1:
The patent identifies specific regions (lid and bottom walls) that are most susceptible to harmful heat input from solar radiation and ground contact, and applies enhanced thermal insulation properties specifically to these locations. The side walls maintain standard insulation properties since they are less exposed to direct solar radiation and ground heat transfer. This targeted approach reduces harmful heat input while minimizing the complexity increase compared to uniformly enhancing all walls.
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 significantly reduces heat input through the lid and bottom, enhancing thermal insulation efficiency by managing heat flux densities from solar radiation and ground contact, thereby maintaining a controlled temperature for temperature-sensitive goods.
Implementation Method 1
the lid has a heat transfer coefficient kD, the bottom has a heat transfer coefficient kB and each of the side walls has one of the heat transfer coefficients kS1, kS2, kS3 or kS4. Furthermore, kDBS1, kS2, kS3, kS4, kB]
Implementation Method 2
incorporates vacuum insulation panels and a pedestal to minimize direct contact with the ground, optimizing thermal insulation
Implementation Method 3
incorporates vacuum insulation panels and a pedestal to minimize direct contact with the ground, optimizing thermal insulation
Data Source
AI summary
Thermal-insulation container 1, comprising a bottom 26, side walls 21, 22, 23, 24 arranged on the bottom 26 and a lid 25 arranged on the side walls 21, 22, 23, 24, wherein the bottom 26, the side walls 21, 22, 23, 24 and the lid 25 completely enclose an interior space 3, and wherein the lid 25 has a heat transfer coefficient kD, the bottom 26 has a heat transfer coefficient kB, and each of the side walls 21, 22, 23, 24 has one of the heat transfer coefficients kS1, kS2, kS3 or kS4, and further kD<minimum [kS1, kS2, kS3, kS4, kB].