Phase change regulation and enhanced enthalpy in mixed tetrabutylammonium salt hydrates for multi-temperature cold storage applications,Case Studies in Thermal Engineering

当前位置： X-MOL 学术 › Case Stud. Therm. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Phase change regulation and enhanced enthalpy in mixed tetrabutylammonium salt hydrates for multi-temperature cold storage applications
Case Studies in Thermal Engineering ( IF 6.4 ) Pub Date : 2024-12-16 , DOI: 10.1016/j.csite.2024.105639
Kai Guo, Ziyi Qu, Wenxiang Zhang, Sizhe Zhou, Yonghuan Zang, Xiao Jiang, Zhihan Yang, Qing Xiao, Haojie Gao

Semi-clathrate hydrates, with high latent heat, tunability, and excellent stability, show promise as phase change cold storage materials. To meet the varying phase change temperature requirements for different applications, this study investigated the dissociation behavior of hydrates formed from two tetrabutylammonium (TBA+) salt mixtures—FBS (TBAF, TBAB, TBAHSO4) and FCS (TBAF, TBAC, TBAHSO4)—at varying concentrations and ratios using differential scanning calorimetry. The results revealed that tuning the ratios of these mixtures enabled single-peak phase change regulation, ranging from 3.8 °C to 15.1 °C and 26 °C to 28.1 °C. The mixed tetrabutylammonium salt solutions exhibited a synergistic effect, enhancing phase change enthalpy beyond pure solutions, with peak values of 225.77 kJ/kg (FBS 0.7-0.3-0) and 239.48 kJ/kg (FCS 0.5-0.5-0). Further analysis indicated that reducing the molar mass of the mixed anions increased both phase change temperature and enthalpy, with FCS exhibiting a more pronounced improvement. For single-peak phase changes, maximum enthalpies of 225.77 kJ/kg (FBS) and 226.48 kJ/kg (FCS) were observed when the mixed anion molar masses were 25.69 and 20.96 kg/kmol, respectively. These finding highlight the potential of mixed tetrabutylammonium slat hydrates for applications, including high-energy density cold storage, multi-temperature range preservation, and advanced air conditioning systems.

更新日期：2024-12-16

点击分享查看原文

点击收藏

阅读更多本刊新发论文