A novel evaluation method for thermal stability of erythritol as phase change materials

IF 5.4 3区工程技术 Q2 ENERGY & FUELS Thermal Science and Engineering Progress Pub Date : 2025-03-01 Epub Date: 2025-01-27 DOI:10.1016/j.tsep.2025.103303

Kuerbanjiang Wusiman , Tianhao Wang , Lin Shi , Xiaoye Dai

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Abstract

Phase change materials (PCMs) are highly valued due to their high energy storage density while maintaining approximately constant temperature conditions. Sugar alcohols are regarded as potential PCMs in the temperature range of 100 to 250 °C. However, the melting enthalpy of sugar alcohols tends to decay during heating process, which affects their thermal storage performance. Different testing methods and experimental settings can affect the melting enthalpy decay of sugar alcohols, resulting in inconsistent evaluation results of thermal stability. Therefore, the influence factors on the melting enthalpy decay of erythritol during tests of constant temperature thermal stability and cycling stability were explored, and the heat release characteristics were also evalutaed in this study. The results showed the thermal stability of erythritol was significantly impacted by the presence of oxygen when heated in an air atmosphere. The sample size factor, in terms of the specific surface area of the sample had little effect on the melting enthalpy decay in the oxygen-free condition. The number of cycles had a minimal influence on the decay of melting enthalpy during cycling stability tests for erythritol when the cooling rate was relatively low (3.1 ℃/min). However, a high cooling rate (10 ℃/min) was likely to facilitate polymorphic transitions throughout the cycling process and led to significant melting enthalpy decay with the number of cycles. A method for evaluating cycling stability was established and a mobilized thermal energy storage (M-TES) system using erythritol PCMs was analyzed as a case. The assessed service life of M-TES system was closely related to the degree of superheat and heat storage duration of cycling. A quantitative relationship model was established for the impact of degree of supercooling on the heat release ratio. Based on the evaluation of the heat release ratio model, erythritol PCM demonstrates high heat release efficiency in practical applications.

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一种新的赤藓糖醇相变材料热稳定性评价方法

相变材料（PCMs）由于其在保持近似恒定温度条件下的高能量存储密度而受到高度重视。在100 ~ 250℃的温度范围内，糖醇被认为是潜在的PCMs。但糖醇在加热过程中，其熔化焓有衰减的趋势，影响了其储热性能。不同的测试方法和实验设置会影响糖醇的熔化焓衰减，导致热稳定性评价结果不一致。因此，本研究探讨了赤藓糖醇在恒温热稳定性和循环稳定性试验中熔化焓衰减的影响因素，并对其放热特性进行了评价。结果表明，赤藓糖醇在空气中加热时的热稳定性受到氧气存在的显著影响。在无氧条件下，样品的比表面积对熔化焓衰减的影响不大。在循环稳定性试验中，当冷却速率较低（3.1℃/min）时，循环次数对赤藓糖醇熔化焓衰减的影响最小。然而，在整个循环过程中，高冷却速率（10℃/min）可能促进多晶转变，并导致熔化焓随循环次数的显著衰减。建立了评价循环稳定性的方法，并以赤藓糖醇PCMs为例进行了动员式热储能（M-TES）系统的分析。M-TES系统的评估使用寿命与过热程度和循环蓄热时间密切相关。建立了过冷度对放热比影响的定量关系模型。基于放热比模型的评价，赤藓糖醇PCM在实际应用中表现出较高的放热效率。

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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.