Suitable material design of temperature-stabilizing device using phase change materials for electric power supply of nanosatellites

IF 5.1 3区 工程技术 Q2 ENERGY & FUELS
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Abstract

This study proposes a new passive thermal-control device utilizing phase-change materials (PCMs) that require minimal active thermal support, such as heaters, to achieve a high-performance and high-reliability power supply for nanosatellites and other space applications. This study evaluated two different PCMs as candidate materials for the device and compares their performances as thermal control devices. One was a solid–solid PCM based on vanadium dioxide doped with tungsten (VWO2), and the other was a microencapsulated PCM containing n-paraffin (NPH-MPCM). For integration into nanosatellites, it is essential to form a PCM as solid blocks. This report adopted a solidification method using epoxy resin (EP) as the binder and determined the optimal block composition for each PCM. The thermal-insulation properties of both PCM blocks in vacuum and low-temperature environments were evaluated and found to be almost equivalent. Considering that the latent heat of VWO2 is only approximately one-fifth that of NPH-MPCM, the practical application of VWO2 as a PCM was demonstrated. Furthermore, VWO2 exhibits a phase-change temperature hysteresis of 4 °C, which is significantly smaller than the 23 °C of NPH-MPCM. This characteristic is expected to help maintain a more constant temperature for power supplies in earth-orbiting micro/nanosatellites. Moreover, lithium-ion battery cells were incorporated into both VWO2-based and NPH-MPCM-based PCM blocks, and their charge–discharge behaviors were evaluated. Only the VWO2-based PCM block could maintain appropriate temperatures to ensure stable charge–discharge operation. Vacuum resistance results suggested that the VWO2-based PCM block is well-suited as a temperature-stabilizing device for electric power supplies in nanosatellites.

利用相变材料设计纳米卫星供电用温度稳定装置的合适材料
本研究提出了一种利用相变材料(PCM)的新型无源热控制装置,这种装置只需最少的主动热支持(如加热器),就能为纳米卫星和其他空间应用提供高性能、高可靠性的电源。本研究评估了两种不同的 PCM 作为该装置的候选材料,并比较了它们作为热控制装置的性能。一种是基于掺杂钨的二氧化钒(VWO2)的固态-固态 PCM,另一种是含有正石蜡的微胶囊 PCM(NPH-MPCM)。要集成到纳米卫星中,必须将 PCM 形成固体块。本报告采用了以环氧树脂 (EP) 为粘合剂的固化方法,并确定了每种 PCM 的最佳块成分。对两种 PCM 块在真空和低温环境下的隔热性能进行了评估,结果表明它们的隔热性能几乎相同。考虑到 VWO2 的潜热仅为 NPH-MPCM 的约五分之一,证明了 VWO2 作为 PCM 的实际应用。此外,VWO2 的相变温度滞后为 4 °C,明显小于 NPH-MPCM 的 23 °C。这一特性有望帮助地球轨道微型/纳米卫星的电源保持更恒定的温度。此外,在基于 VWO2 和 NPH-MPCM 的 PCM 块中都加入了锂离子电池,并对其充放电行为进行了评估。只有基于 VWO2 的 PCM 块能保持适当的温度,以确保稳定的充放电操作。真空电阻结果表明,基于 VWO2 的 PCM 块非常适合作为纳米卫星电力供应的温度稳定装置。
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来源期刊
Thermal Science and Engineering Progress
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.
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