Kuerbanjiang Wusiman , Tianhao Wang , Lin Shi , Xiaoye Dai
{"title":"A novel evaluation method for thermal stability of erythritol as phase change materials","authors":"Kuerbanjiang Wusiman , Tianhao Wang , Lin Shi , Xiaoye Dai","doi":"10.1016/j.tsep.2025.103303","DOIUrl":null,"url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":23062,"journal":{"name":"Thermal Science and Engineering Progress","volume":"59 ","pages":"Article 103303"},"PeriodicalIF":5.1000,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermal Science and Engineering Progress","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2451904925000939","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
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.
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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