外置电阻式固体蓄热结构热应力建模与分析
|
摘要
针对外置电阻式蓄热体在温度载荷下产生热形变致使蓄热体结构不稳定的问题,利用理论推导与有限元数值模拟相结合的方式对蓄热体的热形变及热应力进行分析。通过理论推导不同相变蓄热材料在温度载荷下所产生的热应力及热形变方程,并利用数值模拟的方式对某一工况下的蓄热体热应力数值及分布情况研究,同时进行实际案例分析验证蓄热体内热应力的存在与危害,为蓄热体结构优化设计和工况参数配置提供参考依据。
The thermal deformation and thermal stress of a resistant based regenerator were analyzed by a combination of theoretical analyses and finite element numerical simulations, aimed at the understanding if thermal deformation of the external resistive regenerator could cause unstable structure of the regenerator. The thermal stress and thermal deformation equations of different phase change materials under temperature cycling were deduced theoretically, and the numerical simulations were carried out on the thermal stress and its distribution in the regenerator under a certain working condition(case study). The modelling was validated qualitatively by comparing with the operation of an actual thermal storage body.
The thermal deformation and thermal stress of a resistant based regenerator were analyzed by a combination of theoretical analyses and finite element numerical simulations, aimed at the understanding if thermal deformation of the external resistive regenerator could cause unstable structure of the regenerator. The thermal stress and thermal deformation equations of different phase change materials under temperature cycling were deduced theoretically, and the numerical simulations were carried out on the thermal stress and its distribution in the regenerator under a certain working condition(case study). The modelling was validated qualitatively by comparing with the operation of an actual thermal storage body.
引文
[1]宋婧,曾令可,刘艳春.陶瓷蓄热体的研究现状及应用[J].中国陶瓷,2007(6):7-13.SONG Jing,ZENG Lingke,LIU Yanchun.Research status and application of ceramic regenerator[J].China Ceramics,2007(6):7-13.
[2]HILLSMAN E L.Transportation DSM:Building on electric utility experience[J].Utilities Policy,1995,5(3):doi:10.1016/0957-1787(96)00007-0.
[3]CONSTANTIN L,DRAGOMIR S,CRISMARU I V.Optimization of heat exchange in a heat accumulator with latent heat storage[J].Procedia Technology,2015,19:doi:10.1016/j.protcy.2015.02.104.
[4]王延遐,董敏,牟宝杰,等.蜂窝陶瓷蓄热体的热应力研究[J].中国陶瓷,2012,48(4):39-42.WANG Yanxia,DONG Min,MOU Baojie,et al.Thermal stress study of honeycomb ceramic regenerator[J].Chinese Ceramics,2012,48(4):39-42.
[5]徐德玺.固体电蓄热装置的热力学有限元分析[D].沈阳:沈阳工业大学,2016.XU Dexi.Thermodynamic finite element analysis of solid electric heat storage device[D].Shenyang:Shenyang University of Technology,2016.
[6]YUAN C,XU Y,ZHANG T,et al.Experimental investigation of the phase fraction of wet gas based on convective heat transfer[J].Applied Thermal Engineering,2017,110:102-110.
[7]徐芝纶.弹性力学(第五版)[M].北京:高等教育出版社,2016:9-32.XU Zhilun.Elasticity(Fifth edition)[M].Beijing:Higher Education Press,2016:9-32.
[8]王家昆,施庆华,李广沈,等.压力锅体有限元热应力耦合分析[J].机械,2015,42(7):36-39.WANG Jiakun,SHI Qinghua,LI Guangshen,et al.Coupled thermal stress coupling analysis of pressure cooker body[J].Machinery,2015,42(7):36-39.
[9]运新兵,金属塑性成型原理[M].北京:冶金工业出版社,2012:80-85.YUN Xinbing.Principle of metal plastic forming[M].Beijing:Metallurgical Industry Press,2012:80-85.
[10]KLEIN H,EIGENBERGER G.Approximate solutions for metallic regenerative heat exchangers[J].International Journal of Heat and Mass Transfer,2001,44(18):3553-3563.
[11]MA T,CHEN Y,ZENG M,et al.Stress analysis of internally finned bayonet tube in a high temperature heat exchanger[J].Applied Thermal Engineering,2012,43:101-108.
[2]HILLSMAN E L.Transportation DSM:Building on electric utility experience[J].Utilities Policy,1995,5(3):doi:10.1016/0957-1787(96)00007-0.
[3]CONSTANTIN L,DRAGOMIR S,CRISMARU I V.Optimization of heat exchange in a heat accumulator with latent heat storage[J].Procedia Technology,2015,19:doi:10.1016/j.protcy.2015.02.104.
[4]王延遐,董敏,牟宝杰,等.蜂窝陶瓷蓄热体的热应力研究[J].中国陶瓷,2012,48(4):39-42.WANG Yanxia,DONG Min,MOU Baojie,et al.Thermal stress study of honeycomb ceramic regenerator[J].Chinese Ceramics,2012,48(4):39-42.
[5]徐德玺.固体电蓄热装置的热力学有限元分析[D].沈阳:沈阳工业大学,2016.XU Dexi.Thermodynamic finite element analysis of solid electric heat storage device[D].Shenyang:Shenyang University of Technology,2016.
[6]YUAN C,XU Y,ZHANG T,et al.Experimental investigation of the phase fraction of wet gas based on convective heat transfer[J].Applied Thermal Engineering,2017,110:102-110.
[7]徐芝纶.弹性力学(第五版)[M].北京:高等教育出版社,2016:9-32.XU Zhilun.Elasticity(Fifth edition)[M].Beijing:Higher Education Press,2016:9-32.
[8]王家昆,施庆华,李广沈,等.压力锅体有限元热应力耦合分析[J].机械,2015,42(7):36-39.WANG Jiakun,SHI Qinghua,LI Guangshen,et al.Coupled thermal stress coupling analysis of pressure cooker body[J].Machinery,2015,42(7):36-39.
[9]运新兵,金属塑性成型原理[M].北京:冶金工业出版社,2012:80-85.YUN Xinbing.Principle of metal plastic forming[M].Beijing:Metallurgical Industry Press,2012:80-85.
[10]KLEIN H,EIGENBERGER G.Approximate solutions for metallic regenerative heat exchangers[J].International Journal of Heat and Mass Transfer,2001,44(18):3553-3563.
[11]MA T,CHEN Y,ZENG M,et al.Stress analysis of internally finned bayonet tube in a high temperature heat exchanger[J].Applied Thermal Engineering,2012,43:101-108.