弓形结构对套管式相变蓄热器蓄热性能影响的数值模拟  

Numerical simulation of the influence of arch section on the performance of shell-and-tube latent heat thermal energy storage unit

作　　者：朱玉熙 李宏[2] 孟波 邱燕[1] ZHU Yu-xi;LI Hong;MENG Bo

机构地区：[1]山东大学能源与动力工程学院,山东济南250061 [2]国网济宁供电公司,山东济宁272000 [3]山东耐威科自控技术有限公司,山东济南250000

出　　处：《节能》2020年第2期119-123,共5页Energy Conservation

摘　　要：通过数值模拟研究了相变材料(PCM)RT35在弓形截面管下的融化特性,并与圆管下的特性进行对比。结果表明弓形结构可以有效地减少融化时间,提高融化速度。随着弓高从60 mm减小到42 mm,平均融化速度从7.30 cm^3/min提高到14.50 cm^3/min。弓高最小时,跟圆管相比,总蓄热量减少了26.28%,融化时间减少了62.87%。研究表明提高传热流体(HTF)的入口温度可以缩短融化时间。从60℃升高到65℃再升高至70℃,融化时间缩短的速率变缓。The melting characteristics of RT35 under the arch section tube were studied by numerical simulation and compared with those under the circular tube.The results show that the arch-shaped structure can reduce the melting time and increase the melting rate effectively.When the arch height decreases from 60 mm to 42 mm,the average melting rate increases from 7.30 cm^3/min to 14.50 cm^3/min.When the arch height is the lowest,the total heat storage is reduced by 26.28%and the total melting time is reduced by 62.87%,compared with the circular tube.The results show that the melting time can be shortened by increasing the inlet temperature of HTF.When the inlet temperature of HTF increases from 60℃to 65℃and then to 70℃,the rate of shortening melting time slows down.

关 键 词：相变材料 弓形结构 蓄热 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程] TK11