新型太阳能混合蓄热罐的放热特性

doi:10.16085/j.issn.1000-6613.2017-1329

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1718-1725.DOI: 10.16085/j.issn.1000-6613.2017-1329

新型太阳能混合蓄热罐的放热特性

程友良, 王月坤, 张夏, 韩健

华北电力大学能源动力与机械工程学院, 河北保定 071003

收稿日期:2017-06-29 修回日期:2017-07-11 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 王月坤,硕士研究生,研究方向为清洁能源利用技术与设备。
作者简介:程友良(1963-),男,博士,教授,博士生导师,主要从事流体动力学及流体设备与节能理论、新能源理论及应用等领域的研究。
基金资助:
国家自然科学基金重点基金（11232012）及中央高校基本科研业务费资金（2016XS107）项目。

Heat release characteristics of new solar hybrid heat storage tank

CHENG Youliang, WANG Yuekun, ZHANG Xia, HAN Jian

School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, Hebei, China

Received:2017-06-29 Revised:2017-07-11 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 针对单罐系统的放热效率普遍较低，在单罐的基础上进行改进，增加一个壳管式相变换热器，构成单罐混合蓄热罐。建立了单罐混合蓄热罐的数值模型，将数值模拟结果与实验结果进行对比，研究了相同情况下混合蓄热罐与常规斜温层蓄热罐在放热特性方面的差异，并探究入口熔融盐速度和石英石颗粒直径的变化对蓄热罐放热特性产生的影响。结果表明，在入口熔融盐速度u_in=2.0×10^-4m/s下，混合蓄热罐的放热性能比常规斜温层蓄热罐更优；随着入口熔盐速度的增加，蓄热罐的总放热时间、有效放热时间以及放热效率均下降，并且混合蓄热罐中不同速度与放热效率有一定的比例关系；相对于常规斜温层蓄热罐，石英石颗粒直径的变化对混合蓄热罐放热性能的影响很小。

关键词: 入口速度, 填充床, 石英石颗粒直径, 混合蓄热罐, 优化, 放热特性, 数值模拟

Abstract: As the heat release efficiency of a single tank system is generally low,a hybrid heat storage tank is formed by adding a shell and tube type phase change heat exchanger to the tank. The numerical model of the hybrid heat storage tank was established,and the numerical simulation results were compared with the experimental results. The differences of heat release characteristics between the hybrid heat storage tank and the conventional thermocline heat storage tank were studied under the same condition,and the dependence of heat release characteristics of heat storage tank on different inlet molten salt velocities and quartz particle diameters was explored. The results showed that,when the inlet molten salt velocity uin was 2.0×10^-4m/s,the heat release characteristics of the hybrid heat storage tank was better than that of the conventional thermocline heat storage tank. With the increase of inlet molten salt velocity,the total heat release time,effective heat release time and heat release efficiency of the heat storage tank were decreased,respectively. There was a certain proportional relation between the velocity and the heat release efficiency of the hybrid heat storage tank. Compared to the conventional thermocline heat storage tank,the change of quartz particle diameter had little influence on the heat release performance of the hybrid heat storage tank.

Key words: inlet velocity, packed bed, quartz particle diameter, hybrid heat storage tank, optimization, heat release characteristics, numerical simulation

中图分类号:

TK512

程友良, 王月坤, 张夏, 韩健. 新型太阳能混合蓄热罐的放热特性[J]. 化工进展, 2018, 37(05): 1718-1725.

CHENG Youliang, WANG Yuekun, ZHANG Xia, HAN Jian. Heat release characteristics of new solar hybrid heat storage tank[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1718-1725.

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新型太阳能混合蓄热罐的放热特性

Heat release characteristics of new solar hybrid heat storage tank

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