Phase Change Material Containment Vessels for Thermal Conduction
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Solution Overview
Problem
Existing phase change materials (PCMs) are not effectively utilized in building environments due to low thermal conductivity and lack of visibility, which limits their ability to modulate temperature variations and provide thermal comfort to occupants, as they are often placed out of sight and not directly exposed to airflow.
Innovation Solution
Development of containment vessels with high surface-to-area ratios and embedded conductive meshes or structures that enhance thermal conductivity and allow for visual observation of PCM phase changes, enabling reconfiguration and improved thermal energy conduction between PCMs and surrounding air, while also promoting airflow and light modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If PCMs are placed out of view within wall cavity or ceiling, then their operation and functionality are hidden from occupants, but their ability to directly interact with airflow and provide visual feedback is reduced
Solution Approach 1:
The containment vessels are designed to be movable and reconfigurable within the building interior, allowing occupants to dynamically adjust their positions to optimize thermal energy conduction based on real-time thermal comfort needs and visual observation of PCM states
Solution Approach 2:
The transparent containment vessels act as intermediaries that simultaneously enable visual observation of PCM operation and maintain effective thermal energy conduction between PCMs and surrounding air, resolving the conflict between visibility and thermal performance
2Reliability
If PCMs are exposed directly to airflow in living/working space, then their ability to modulate temperature is enhanced, but their operation becomes visible to occupants
Solution Approach 1:
The PCM materials undergo visible phase changes (solid-liquid transitions) that provide visual feedback to occupants about their operational state, making the temperature modulation process observable and intuitive without requiring additional indicators
3Quantity of substance
If PCMs have low thermal conductivity, then they store latent heat effectively, but their ability to conduct thermal energy to surrounding air is limited
Solution Approach 1:
The system uses composite containment structures combining transparent materials with high surface-area-to-volume ratios that enhance thermal conduction while maintaining visual transparency, allowing PCMs to both store latent heat and effectively conduct thermal energy to surrounding air
4Reliability
If containment vessels have high surface-to-area ratios, then thermal conduction between PCMs and air is enhanced, but the complexity of device design increases
Solution Approach 1:
The system uses multiple smaller containment vessels distributed throughout the space rather than one large vessel, with each vessel having optimized surface-area-to-volume ratio for efficient thermal conduction while maintaining simple individual structures that are easy to manufacture and deploy
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 enhances the thermal conductivity of PCMs, allowing for effective temperature stabilization and visual awareness, enabling occupants to reconfigure systems for improved comfort and energy efficiency, while also optimizing light transmission and thermal storage.
Implementation Method 1
the substances with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. Heat is absorbed or released when the material changes from solid to liquid and vice versa
Implementation Method 2
PCMs are classified as latent heat storage (LHS) units. PCMs store 5 to 14 times more heat per unit volume than conventional storage materials such as water, masonry or stone
Implementation Method 3
containers that promote conduction of thermal energy between the phase change materials within the containment vessels and the surrounding air. structures to promote the conduction of thermal energy to and from the interior of the container
Implementation Method 4
the containers are transparent to enable visual awareness of the operation and functionality of the PCMs
Data Source
AI summary
Devices that incorporate phase change materials in containment vessels promote conduction of thermal energy between the phase change materials within the containment vessels and the surrounding air. In some embodiments, the containment vessels are transparent to enable visual awareness of the operation and functionality of the PCMs. In some embodiments, the containment vessels are design to passively promote air flow across the surfaces of the containment vessels. In some embodiments, the containment vessels include embedded structures to promote the conduction of thermal energy to and from the interior of the containment vessel. In some of these embodiments, the intent is to target the location of crystal ‘seeds’ and control crystal growth, thus gaining greater control over thermal transfer.