Heat capacities of some sugar alcohols as phase change materials for thermal energy storage applications
| Autor: | Youyou Zhang, Heng Yin, Wenxia Wang, Rui Jia, Quan Shi, Rongchun Li, Zhi-Cheng Tan, Da-Wei Fang, Keyan Sun |
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| Rok vydání: | 2017 |
| Předmět: |
Phase transition
Chemistry 020209 energy Enthalpy Thermodynamics 02 engineering and technology Thermal energy storage Xylitol Heat capacity Atomic and Molecular Physics and Optics Energy storage Physical property chemistry.chemical_compound Differential scanning calorimetry 0202 electrical engineering electronic engineering information engineering General Materials Science Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Chemical Thermodynamics. 115:233-248 |
| ISSN: | 0021-9614 |
| Popis: | In recent years, sugar alcohols have attracted much attention due to their remarkable phase change properties for thermal energy storage applications. The thermodynamic properties especially the heat capacities would play a crucial role in theoretically and technically investigating the energy storage performance for sugar alcohols. However, as far as we known, the heat capacities of sugar alcohols have never been studied in a wide temperature region. In this study, we have measured the heat capacities of six sugar alcohols of D-mannitol, Myo-Inositol, xylitol, D-arabinitol, L-arabinitol and erythritol in the temperature range from T = (1.9 to 550) K for the first time using a combination of Physical Property Measurement System and differential scanning calorimeter. Based on the heat capacity curve fitting, the standard molar heat capacity, entropy and enthalpy at 298.15 K and 0.1 MPa, and melting temperature and transition enthalpy in the solid–liquid phase transition region were consequently obtained for these sugar alcohols. Moreover, the heat capacity and phase transition properties obtained in this work were also compared with previous results reported in literature. |
| Databáze: | OpenAIRE |
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