Phase Change Material-Coated Condenser Tubes for Compact Heat Transfer
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Solution Overview
Problem
Conventional refrigeration systems face inefficiencies in heat transfer due to increased condenser tube lengths, which compromise compactness, reliability, and require additional maintenance, while liquid-filled pouches lack thermal contact, thus not significantly enhancing heat transfer efficiency.
Innovation Solution
A hollow tube coated with a curable composition comprising a thermally conductive component, phase change material, and a cure system is used as a condenser coil, enhancing heat transfer efficiency without increasing system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the length of the condenser tube is increased to increase heat transfer efficiency, then heat transfer efficiency is improved, but the compactness of the condenser decreases and the required size of the refrigeration unit increases
Solution Approach 1:
The invention changes the physical-chemical parameters of the condenser tube surface by coating it with a phase change material. This coating enables the surface to undergo phase transitions (solid-liquid-solid) at specific temperatures, fundamentally altering how heat is transferred and stored, thereby achieving enhanced heat transfer efficiency without increasing the physical dimensions of the condenser.
Solution Approach 2:
The invention directly applies phase change materials to the condenser tube surface, utilizing the phase transition phenomenon to enhance heat transfer. The coating absorbs latent heat during phase change from solid to liquid and releases it during freezing, significantly improving heat transfer efficiency within the same compact volume.
2Productivity
If the length of the condenser tube is increased to increase heat transfer efficiency, then heat transfer efficiency is improved, but additional labor and material costs are introduced and reliability decreases
Solution Approach 1:
The invention transforms the functional parameters of the condenser surface through phase change material coating, achieving enhanced heat transfer and energy storage capabilities within the original tube length. This eliminates the need for additional tubes and associated joints, thereby improving reliability by reducing potential leak points while maintaining compactness.
3Device complexity
If conventional condenser systems are used, then the structure is simple, but periodic maintenance such as cleaning is required to remove dust, dirt, and debris that decrease heat transfer efficiency
Solution Approach 1:
The phase change material coating creates a surface that undergoes periodic phase transitions, which can prevent the accumulation of dust and debris by disrupting their adhesion to the surface. The thermal activity during phase changes may also help in self-cleaning effects, reducing maintenance requirements while maintaining the relatively simple condenser structure.
4Productivity
If liquid filled pouches are used to enhance heat transfer efficiency, then heat absorption capability is improved, but there is no thermal contact with the condenser coil so heat transfer is not significantly more efficient
Solution Approach 1:
The invention creates a composite structure by coating the condenser tube with phase change material, ensuring intimate thermal contact between the refrigerant, the tube wall, and the phase change material. This composite approach combines the thermal conductivity of the metal tube with the high latent heat capacity of the phase change material, achieving both thermal contact and enhanced heat absorption capability.
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 coated tube improves heat transfer efficiency by absorbing and storing latent heat, reducing the need for fans and maintaining a regulated temperature, thus enhancing the overall energy efficiency of refrigeration units.
Implementation Method 1
The composition comprises either A. i) a curable component; ii) a thermally conductive component; iii) a phase change material; and iv) a cure system
Implementation Method 2
a phase change material-coated heat exchange tubes
Implementation Method 3
ii) a thermally conductive component
Data Source
AI summary
Disclosed herein is a hollow tube comprising two ends, one end adapted to receive a fluid and the other end adapted to discharge the fluid, where the hollow tube has an interior surface and an exterior surface and a curable composition is disposed about at least a portion of the exterior surface of the hollow tube, where the curable composition comprises before cure: a curable component, a thermally conductive component, a phase change material, and a cure system.