基于MgO砖非定值物理特性的蓄热体热分析  

HEAT ANALYSIS OF REGENERATOR BASED ON NON-FIXED VALUE PHYSICAL CHARACTERISTICS OF MgO BRICK

作　　者：徐耀祖 商向东[1] 徐景久 赵文珍[1] 赵文辉[1] Xu Yaozu;Shang Xiangdong;Xu Jingjiu;Zhao Wenzhen;Zhao Wenhui(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Shenyang Lanhao Keji Co.,Ltd.,Shenyang 110168,China)

机构地区：[1]沈阳工业大学机械工程学院,沈阳110870 [2]沈阳兰浩科技有限公司,沈阳110168

出　　处：《太阳能学报》2021年第9期218-223,共6页Acta Energiae Solaris Sinica

摘　　要：以工程中常用的MgO砖蓄热体结构为研究对象,通过热物性参数的非定值特性,拟合出相关参数曲线,并对热物性参数的定值和非定值进行对比分析,通过实验验证非定值分析方法的正确性。以非定值分析方法对蓄热体进行不同蓄热功率分析,得到对应的蓄热时间和蓄热容量的变化趋势,并从蓄热体整体和局部的角度出发,分析蓄热体不同位置的温度分布情况。结果表明,定值、非定值分析结果差异较大,通过实验方法验证非定值分析方法的可靠性。蓄热体整体温度分布由中心向四周呈递减趋势,其局部分析中热源之间的温度呈凹抛物分布。蓄热容量随蓄热功率增加而减小,在该结构下达到理论蓄热容量的80%时,蓄热功率需低于110 kW。The MgO brick regenerator structure commonly used in engineering is taken as the research object,through the non-fixed value characteristics of thermophysical parameters,the related parameter curves are fitted,and the fixed value and non-fixed value of thermophysical parameters are compared and analyzed.The non-fixed value analysis method is verified by experimental means.Various heat storage power of regenerator is analyzed by non-fixed value analysis method,and the change trend of corresponding heat storage time and heat storage capacity is obtained.From the whole and local point of view of the regenerator,the temperature distribution at different positions of the regenerator is analyzed.The results show that fixed-value analysis and non-fixed-value analysis are quite different,and the reliability of non-fixed-value analysis method is verified by experimental methods.The overall temperature distribution of regenerator decreases from the center to the periphery,and the temperature between heat sources in local analysis is concave parabolic distribution.The heat storage capacity decreases with the increase of heat storage power.When the heat storage capacity reaches 80% of the theoretical heat storage capacity under this structure,the heat storage power needs to be less than 110 kW.

关 键 词：蓄热 固体蓄热器 蓄热体结构 MgO固体材料 热分析 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]