复合相变材料比热容的表征与估算
IF 5.1
3区 工程技术
Q2 ENERGY & FUELS
引用次数: 0
摘要
本研究介绍了用于调节沥青路面温度的环氧树脂复合相变材料（ERPCM）的制备方法，并使用自行设计的热流计仪器（HFMA）系统在动态和稳态模式下测量了其比热容。提出了用梯形曲线拟合比热容曲线的优化方法。使用梯形曲线描述熔化和结晶过程中的比热容误差分别为矩形曲线的 24.1% 和 34.2%。当使用在 HFMA 稳态模式下测量的比热容作为输入材料参数时，模拟温度曲线的误差最小，均方根误差（RMSE）为 0.63。根据在稳态模式下测量的比热容曲线进行的数值模拟表明，添加 ERPCM 可有效地将路面的最低温度提高 0.9 °C，将最高温度降低 1.6 °C。在加热阶段，通过 DSC 和动态模式测定的比热容明显低估了 LHTI，与稳态模式相比，分别低估了 35.4% 和 11.9%。本文章由计算机程序翻译，如有差异，请以英文原文为准。
Characterization and estimation of specific heat capacity for composite phase change material
This study describes the preparation of an epoxy resin composite phase change material (ERPCM) for regulating asphalt pavement temperature and measures its specific heat capacity using a self-designed heat flow meter apparatus (HFMA) system in both dynamic and steady state modes. An optimization method for fitting the specific heat capacity curve with a trapezoidal curve is proposed. The error in describing the specific heat capacity during the melting and crystallization processes using the trapezoidal curve accounts for 24.1 % and 34.2 % of that of the rectangular curve, respectively. When the specific heat capacity measured in HFMA steady state mode is used as the input material parameter, the simulated temperature curve has the smallest error, with a root mean square error (RMSE) of 0.63. Numerical simulations based on specific heat capacity curves measured in steady state mode show that the addition of ERPCM can effectively increase the pavement’s minimum temperature by 0.9 °C and decrease the maximum temperature by 1.6 °C. The specific heat capacity characterized by DSC and dynamic mode significantly underestimates the LHTI during the heating phase, by 35.4 % and 11.9 % compared to the steady state mode, respectively.
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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.
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