Composite Shape-Stabilized PCM for Thermal Energy Storage
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Solution Overview
Problem
Organic solid-liquid phase change materials (PCMs) face limitations due to poor heat transfer performance and low heat storage utilization, leading to serious liquid leakage and restricted applications.
Innovation Solution
A thermal conduction enhanced organic composite shape-stabilized PCM is developed, comprising a coordination crosslinked network polymer, an organic solid-liquid PCM, and a thermal conduction enhancer, with specific mass ratios and components such as polyacrylic acid, sodium alginate, and graphene, to improve thermal conductivity and prevent liquid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If organic solid-liquid PCM is used for energy storage, then high thermal storage density is achieved, but poor heat transfer performance and low heat storage utilization occur due to small heat conductivity coefficient
Solution Approach 1:
The patent creates a composite material system consisting of organic PCM encapsulated within a coordination crosslinked network polymer matrix containing thermal conduction enhancers. This composite structure combines the high thermal storage density of organic PCM with the improved heat transfer performance provided by the conductive polymer network and thermal conduction enhancers, resolving the contradiction between storage capacity and heat transfer efficiency.
Solution Approach 2:
The patent applies local quality by creating regions of high thermal conductivity within the PCM structure through the coordination crosslinked network polymer and thermal conduction enhancers. The thermal conduction enhancers are distributed throughout the polymer matrix to establish localized heat transfer pathways, allowing different regions of the composite to have different thermal conductivities - high in the polymer/conductor regions and lower in the PCM regions.
2Quantity of substance
If organic solid-liquid PCM is used for energy storage, then high thermal storage density is achieved, but serious liquid leakage occurs during operation
Solution Approach 1:
The coordination crosslinked network polymer acts as a flexible shell or matrix that encapsulates and contains the organic PCM. The polymer network provides structural integrity and confinement, preventing liquid leakage while allowing the PCM to undergo phase changes. The crosslinked structure provides mechanical strength to contain the PCM in liquid state without leakage.
Solution Approach 2:
The composite structure combines the PCM phase change functionality with the polymer matrix containment structure. The polymer phase provides leakage prevention while the PCM phase provides thermal storage, creating a material that simultaneously achieves high thermal storage density without liquid leakage.
3Reliability
If thermal conduction enhancer is added to improve heat transfer, then thermal conductivity is enhanced, but device complexity increases due to coordination crosslinked network polymer synthesis
Solution Approach 1:
The patent utilizes parameter changes in the form of coordination chemistry - changing the chemical state from simple mixing to coordination-bonded crosslinked network. By adjusting parameters such as metal ion selection, polymer-to-metal ratio, and crosslinking degree, the thermal conductivity can be tuned without fundamentally changing the synthesis approach. The coordination crosslinking provides a systematic way to control network structure and thermal properties.
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 thermal conductivity, maintains shape stability, and prevents liquid leakage, enabling broader applications in thermal energy storage and management with a simple synthesis process.
Implementation Method 1
the coordination crosslinked network polymer being formed by complexing a polymer compound with metal ions
Implementation Method 2
thermal conduction enhanced organic composite shape-stabilized phase change material
Implementation Method 3
the phase change material (PCM) is to achieve energy storage and release through the absorption or release of a large amount of heat when a material changes phase
Data Source
AI summary
The present invention relates to the technical field of new materials, and relates to a thermal conduction enhanced organic composite shape-stabilized phase change material and a preparation method thereof. A thermal conduction enhanced organic composite shape-stabilized phase change material, which is composed of a coordination crosslinked network polymer, an organic solid-liquid phase change material and a thermal conduction enhancer, the mass percent are as follows: coordination crosslinked network polymer 1-50%, organic solid-liquid phase change material 40-98.9%, and thermal conduction enhancer 0.1-10%, the coordination crosslinked network polymer being formed by complexing of polymer compound with metal ions. The invention has simple synthesis process and convenient applications, the material having large enthalpy of phase change, excellent shape stabilizing effect, while the phenomenon of liquid leakage will not occur during operation. The material has broad application prospects in the field of thermal energy storage and management.