CaO/Ca(OH)_2储热系统试验及CO_2失效研究  

Experimental Study on the Performance of CaO/Ca(OH)_2 Thermochemical Heat Storage and its Failure under CO_2 Environment

作　　者：闫君 潘智豪[1] 赵长颖[1] 王倩[1] 

机构地区：[1]上海交通大学工程热物理研究所,上海200240

出　　处：《工程热物理学报》2017年第12期2679-2685,共7页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划(No.2013CB228303)

摘　　要：CaO/Ca(OH)_2是一种最有可能实现跨季度、远距离储热的化学蓄热方法.本文分别准备了球磨掺杂Li后的Ca(OH)_2以及纯Ca(OH)_2储热物料,然后通过搭建固定床试验台对Ca(OH)_2储放热过程进行了研究,发现储热速度随壁面温度的提高而加快,另外掺杂Li会大幅提高储热效率;放热速度随放热温度提高而降低,随反应水蒸气压力增加而加快.本文还进行了模拟空气环境下储热系统受到CO_2影响的失效试验,结果表明,暴露空气下储热材料的循环性能会受到CO_2的影响而出现大幅下降,掺杂Li并不会改变这种影响结果,所以需要在今后的应用中设计避免储热过程受到持续性或长时间的CO_2影响。CaO/Ca（OH）2 thermochemical heat storage material is very promising to realize long-term heat storage. A fixed-bed reactor test-rig has been built to study the heat storage and release processes of CaO/Ca（OH）2 systems. Pure and Li-doped Ca（OH）2 were adopted as the raw thermochemical heat storage materials. The results showed that the heat storage rate were enhanced by doping Ca（OH）2 with Li ion. The heat storage rate was also found to be speeded up with the wall temperature. Adversely, the heat release rate declined with the increase of wall temperature, but increased with water vapor pressure. Experiments on the effect of CO2 showed that the cyclic stability of CaO/Ca（OH）2 will be severely affected by CO2 should operate under environment without CO2. contained in the air, therefore, the CaO/Ca（OH）2

关 键 词：热化学储热 储热试验 CO2影响 掺杂 

分 类 号：TK02[动力工程及工程热物理]