...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >The optimization of mixing ratio of expanded graphite mixed chemical heat storage material for magnesium oxide/water chemical heat pump
【24h】

The optimization of mixing ratio of expanded graphite mixed chemical heat storage material for magnesium oxide/water chemical heat pump

机译：氧化镁/水化学热泵用膨胀石墨混合化学储热材料配合比的优化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A chemical heat storage composite material (EMC), a mixture of expanded graphite (EG), magnesium hydroxide (Mg(OH)_2), and calcium chloride (CaCl_2), was developed as a magnesium oxide/water chemical heat pump reactant. The potential of the EMC was confirmed and optimized mixing weight ratio between EG and Mg(OH)_2 was suggested in previous study. In this study, the optimization of mixing molar ratio between Mg(OH)_2 and CaCl_2 for practical application was conducted; total six kinds of EMC mixtures, which have different mixing molar ratio from 0, to 0.01 to 0.20 with optimized mixing weight ratio, were prepared then dehydration and hydration experiments were carried out. From experimental results, it was confirmed that hydration reacted conversion was increased as increasing amount of CaCl_2 in an EMC and the optimized mixing molar ratio was suggested as mixing molar ratio, α, is 0.1 at mixing weight ratio, n, is 0.8 by considering chemical rate constant and reacted conversion. Hydration under various vapor pressures and temperatures of optimized EMC was also conducted and optimized EMC showed better performance than pure Mg(OH)_2. Finally, the heat output performance of optimized EMC was estimated numerically. In conclusion, optimized EMC performed better on dehydration and hydration than pure Mg(OH)_2 by adding EG, which has high thermal conductivity and large specific surface, and CaCl_2, which has hydrophilic property.
机译：开发了化学储热复合材料（EMC），膨胀石墨（EG），氢氧化镁（Mg（OH）_2）和氯化钙（CaCl_2）的混合物作为氧化镁/水化学热泵反应物。证实了EMC的潜力，并且在先前的研究中建议了EG和Mg（OH）_2之间的最佳混合重量比。本研究对实际应用中的Mg（OH）_2与CaCl_2混合摩尔比进行了优化。制备了6种EMC混合物，混合摩尔比从0到0.01至0.20，混合比最佳，制备了混合物，并进行了脱水和水合实验。从实验结果可以证实，EMC中水合反应转化率随CaCl_2含量的增加而增加，并且考虑到化学成分，建议的最佳混合摩尔比为混合摩尔比α为0.1，混合重量比n为0.8。速率常数和反应转化率。还进行了各种蒸汽压力和温度下的水合水合优化的EMC，并且优化的EMC显示出比纯Mg（OH）_2更好的性能。最后，通过数值估算了优化后的EMC的热输出性能。总之，通过添加导热率高，比表面积大的EG和具有亲水性的CaCl_2，优化的EMC在脱水和水合方面的性能优于纯Mg（OH）_2。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号