POLYMERS AND POLYMER MATRIX COMPOSITES |
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Study on the Crystallization Characteristics of Typical Sugar Alcohol Phase Change Materials Considering Heating Duration and Superheating Temperature |
WUSIMAN Kuerbanjiang1,2, WANG Tianhao1, SHI Lin1, DAI Xiaoye1,*
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1 Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China 2 School of Electrical Engineering, Xinjiang University, Urumqi 830046, China |
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Abstract Sugar alcohols are widely regarded as high-performance medium-temperature phase change materials (PCMs) and have attracted significant attention. Investigating the crystallization behavior of sugar alcohol PCMs under varying heat storage temperatures and durations is crucial for assessing the heat release performance of thermal storage systems in practical applications. However, current research in this area remains insufficient. In this study, under a nitrogen (N2) atmosphere, non-isothermal and isothermal testing methods were employed. Two parameters, supercooling degree (ΔTsc) and heat release ratio (HRR), were introduced to investigate the crystallization behavior of erythritol, D-mannitol, and inositol as a function of superheating temperature and duration. The experimental results indicated that, during non-isothermal testing, the supercooling degrees of erythritol, D-mannitol, and inositol remained relatively stable at approximately 70 ℃, 46 ℃, and 37 ℃ within the degrees of superheating ranges of 70 ℃, 25 ℃, and 15 ℃, respectively, as heating duration increased. Their heat release ratios also remained relatively stable within the respective superheating ranges, approximately 68%, 91%, and 78%. The isothermal test results further showed that, at a degree of superheat of 10 ℃, the supercooling degrees of these sugar alcohols remained relatively stable over duration, although they were significantly lower than in the non-isothermal tests, at approximately 19.6 ℃, 1.6 ℃, and 1.3 ℃, respectively.
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Published: 10 July 2025
Online: 2025-07-21
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