Buoyancy Platform Assembly for PCM Thermal Management
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Solution Overview
Problem
Managing temperature distribution in phase change materials (PCMs) is challenging due to increased thermal resistance and gap formation as the distance between the phase-change front and the heat sink increases, which affects thermal energy distribution.
Innovation Solution
A buoyancy-based platform assembly with a passageway and a whip rod that orbits within the PCM, combined with extensible heat transfer fluid lines, to induce localized flow fields and reduce scale buildup, promoting efficient temperature management by maintaining a consistent distance between the phase-change front and the heat sink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the distance between the phase-change front and the heat sink increases, then the thermal energy storage capacity increases, but the thermal resistance increases and temperature distribution becomes difficult to manage
Solution Approach 1:
The system segments the thermal management function by introducing a movable platform that divides the PCM container into multiple zones. The platform with passageways creates separate flow paths for liquid PCM, enabling localized heat transfer management while maintaining overall large storage volume. This segmentation allows the system to handle large volumes without proportionally increasing thermal resistance.
Solution Approach 2:
The platform is designed to move vertically in response to density changes during phase transition. As PCM solidifies and density increases, the platform sinks to maintain optimal distance from the phase-change front. This dynamic adjustment ensures consistent thermal contact and manageable temperature distribution regardless of the overall PCM volume or stage of phase change.
2Device complexity
If the platform remains stationary, then the system structure is simple, but scale buildup occurs on the platform surface during phase change
Solution Approach 1:
The platform transitions from a stationary component to a dynamically moving one that responds to density changes in the PCM. This movement prevents solidified PCM from accumulating on the platform surface by continuously adjusting the platform's position relative to the phase-change front, thereby eliminating scale buildup without requiring complex mechanical scraping or cleaning mechanisms.
Solution Approach 2:
The system uses the natural density differences between liquid and solid PCM phases to drive the platform's movement automatically. The platform self-adjusts its position in response to phase change conditions, eliminating the need for external control systems or additional components to prevent scale buildup. The buoyancy-driven motion inherently prevents harmful scale accumulation.
3Device complexity
If the heat transfer fluid line is rigid, then the system structure is simple, but the line cannot accommodate platform movement between liquid and solid phases
Solution Approach 1:
The heat transfer fluid line is replaced with a flexible hose that can dynamically adjust its configuration as the platform moves. The flexible line accommodates vertical displacement of the platform during phase change cycles without requiring complex telescoping mechanisms or multiple connection points. This simple flexible connection maintains system adaptability while minimizing structural complexity.
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 system effectively manages temperature distribution by reducing thermal resistance and scale buildup, ensuring continuous flow and efficient heat transfer, thereby enhancing PCM thermal cycling efficiency.
Implementation Method 1
The platform can include a density that is less than a density of the phase change material when in a solid phase and greater than a density of the phase change material when in a liquid phase
Implementation Method 2
The system can be configured to induce localized flow fields of PCM liquid to cause liquid to flow to a location of solidification activity
Implementation Method 3
Phase change materials release and absorb energy during transitions between phases (e.g., transition from a liquid to a solid and vice-versa)
Implementation Method 4
Phase change materials release and absorb energy during transitions between phases
Implementation Method 5
The extensible heat transfer fluid line can be configured to extend or retract as the platform moves between (1) a first position corresponding to a position of the platform when a majority of the phase change material is in the liquid phase and (2) a second position corresponding to a position of the platform when a majority of the phase change material is in the solid phase
Data Source
AI summary
The disclosed technology includes systems and methods of managing temperature distributions of phase change material. The disclosed technology can include a system comprising a platform having a passageway therethrough. The platform can include a density that is less than a density of the phase change material when in a solid phase and greater than a density of the phase change material when in a liquid phase. The system can further include a whip rod disposed at least partially in the passageway of the platform.