化工学报2019，Vol.70Issue(z2)：237-243,7.DOI:10.11949/0438-1157.20190509
管壳式相变储热器性能快速预测研究
Performance prediction of shell-and-tube latent heat thermal energy storage unit
摘要
Abstract
In order to construct a universal prediction method for complete melting time, a concept of dimensionless heat storage time is introduced, which is defined as the ratio of actual melting time to referenced melting time. The referenced melting time obtained by static approximation method can basically reflect the non-linear relationship between the melting time and its influencing parameters, which effectively reduces the non-linearity of dimensionless melting time fitting correlation and enlarges its application scope. The influence of Stefan number, dimensionless length and ratio of outer diameter to inner diameter on dimensionless melting time of shell-and-tube latent heat thermal energy storage unit was analyzed by numerical simulation method, and the correlation equation was fitted. The results show that the empirical correlation has a wide application range and high prediction accuracy. Within the parameters considered in this paper, the error of fast prediction results is no more than 10%. The dimensionless heat storage time and its correlation method proposed in this paper can be popularized to other forms of solid-liquid phase change thermal energy storage devices.关键词
相变/传热/数值模拟/管壳式相变储热器/无量纲储热时间Key words
phase change/ heat transfer/ numerical simulation/ shell-and-tube latent heat thermal energy storage unit/ dimensionless melting time分类
能源科技引用本文复制引用
徐阳,郑章靖,李明佳..管壳式相变储热器性能快速预测研究[J].化工学报,2019,70(z2):237-243,7.基金项目
国家自然科学基金项目(51806237) （51806237）
江苏省自然科学基金项目(BK20170283) （BK20170283）
中国博士后科学基金项目(2019M652002) （2019M652002）
