Vat photopolymerization for thermal energy storage applications using encapsulated phase change material suspended in photocurable resin

IF 5.1 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2024-10-18 DOI:10.1016/j.tsep.2024.102986

Isabel Melendez, Karl B. Morgan, Casey J. Troxler, Rafael M. Rodriguez, Sandra K.S. Boetcher

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引用次数: 0

Abstract

A novel approach to additively manufacture latent heat thermal energy storage heat exchangers through the development of microencapsulated phase change material (MEPCM) suspensions in photocurable resin for vat photopolymerization (VPP) 3D printing is presented. Using MEPCM addresses the leakage risks that have typically been associated with PCMs and subsequently makes the particulates a suitable additive for VPP 3D printing. In the current study, VPP was employed to fabricate functional composites with varying MEPCM mass fractions for thermal, rheological, microstructure, and chemical characterization. Microstructure visualization was conducted to assess the overall distribution of MEPCM within the 3D printed samples and to confirm the structural integrity of the encapsulated particles after printing. The influence of the base resin viscosity was explored by investigating two photocurable resins with different viscosities—a high-tensile UV photopolymer and an ABS-like resin—during the printing process. Thermal properties, such as latent heat of fusion, phase-change temperature, thermal conductivity, and decomposition temperature of the 3D printed samples were determined. Rheology was used to observe the effect of varying shear rates on the MEPCM-resin mixtures to identify the optimal viscoelastic properties for VPP 3D printing. It was determined that the ABS-like resin was able to contain a larger amount of PCM (40 wt%) while maintaining printability due to the lower viscosity of the corresponding pure resin. The 40 wt% MEPCM composite exhibited an average viscosity of 18,817 cPs, a maximum latent heat of fusion of 54.12 kJ/kg, and a 12.4% reduction in thermal conductivity compared to the pure polymer.

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使用悬浮在光固化树脂中的封装相变材料进行热能储存应用的罐式光聚合反应

本文介绍了一种通过开发用于大桶光聚合（VPP）三维打印的光固化树脂中的微胶囊相变材料（MEPCM）悬浮液来添加制造潜热热能储存热交换器的新方法。使用 MEPCM 解决了通常与 PCM 相关的泄漏风险，从而使微粒成为 VPP 3D 打印的合适添加剂。在当前的研究中，采用 VPP 制备了具有不同 MEPCM 质量分数的功能复合材料，并对其进行了热学、流变学、微观结构和化学表征。微观结构可视化可用于评估 MEPCM 在三维打印样品中的总体分布情况，并确认打印后封装颗粒的结构完整性。在打印过程中，通过研究两种具有不同粘度的光固化树脂--一种高强度 UV 光聚合物和一种类似 ABS 的树脂--来探索基础树脂粘度的影响。测定了三维打印样品的热性能，如熔融潜热、相变温度、热导率和分解温度。流变学用于观察不同剪切速率对 MEPCM 树脂混合物的影响，以确定 VPP 3D 打印的最佳粘弹性能。结果表明，由于相应纯树脂的粘度较低，类 ABS 树脂能够含有较多的 PCM（40 wt%），同时保持可打印性。与纯聚合物相比，40 wt% MEPCM 复合材料的平均粘度为 18,817 cPs，最大熔融潜热为 54.12 kJ/kg，热导率降低了 12.4%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.