泡沫铜对相变蓄热系统蓄热性能影响的实验研究
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摘要
石蜡作为一种有机固液相变材料,因其具有高潜热值、无毒、无腐蚀、性能稳定等优点被广泛应用于热蓄存、电子冷却及建筑温控等领域。但在蓄热过程中,因石蜡导热系数较低,导致蓄热时间过长、温差过大。实验按照1∶3的比例将泡沫金属铜均匀分布在石蜡箱体中,探究泡沫铜对石蜡相变速率的影响。结果显示:加入泡沫铜后,有效地提升了石蜡的相变速率,缩短了石蜡相变的时间;同时加入泡沫铜后,石蜡内部温差明显减小,温度分布更加均匀,并且有效缓解了自然对流造成的顶部过热和底部不熔化现象。
As an organic solid-liquid phase change material, paraffin is widely used in the fields of thermal storage, electronic cooling and building temperature control because of its higher latent heat, non-toxic, non-corrosive and property stability. However, because of low thermal conductivity, the heat storage time of paraffin is usually long and the temperature difference inside paraffin is high. So the metal copper foam was evenly added into the paraffin box in proportion of 1∶3, and the influence of the copper foam on the phase change rate of paraffin wax was investigated. The results showed that the copper foam effectively promoted the paraffin phase transformation rate and shortened the paraffin phase transition time. At the same time, after adding the foam copper, the internal temperature difference was obviously reduced, the temperature distribution became more uniform, and the top overheating and the bottom un-melting phenomenon caused by natural convection were effectively relieved.
As an organic solid-liquid phase change material, paraffin is widely used in the fields of thermal storage, electronic cooling and building temperature control because of its higher latent heat, non-toxic, non-corrosive and property stability. However, because of low thermal conductivity, the heat storage time of paraffin is usually long and the temperature difference inside paraffin is high. So the metal copper foam was evenly added into the paraffin box in proportion of 1∶3, and the influence of the copper foam on the phase change rate of paraffin wax was investigated. The results showed that the copper foam effectively promoted the paraffin phase transformation rate and shortened the paraffin phase transition time. At the same time, after adding the foam copper, the internal temperature difference was obviously reduced, the temperature distribution became more uniform, and the top overheating and the bottom un-melting phenomenon caused by natural convection were effectively relieved.
引文
[1] 章学来,于树轩,林原培,等.相变蓄热冷凝热回收实验研究 [J].化工学报,2010,61(S2):43-48.ZHANG Xue-lai,YU Shu-xuan,LIN Yuan-pei,et al.Experimental study on heat recovery of phase change heat storage condensation [J].Journal of Chemical Industry and Engineering,2010,61(S2):43-48.(in Chinese)
[2] 史德福,陈华,黄耀坤.带冷凝热回收的家用空调器的研究 [J].低温与超导,2012,40( 5):63-67.SHI De-fu,CHEN Hua,HUANG Yao-kun.Research on household air conditioners with condensation heat recovery [J].Cryogenic and Superconducting,2012,40(5):63-67.(in Chinese)
[3] 周楚,陈华,史德福,等.相变蓄热式热泵热水器性能实验研究 [J].建筑科学,2014,30(4):5-9.ZHOU Chu,CHEN Hua,SHI De-fu,et al.Experimental study on the performance of phase change regenerative heat pump water heater [J].Building Science,2014,30(4):5-9.(in Chinese)
[4] 朱家玲,李慧,张伟.螺旋管式相变蓄热过程的数值模拟与系统优化 [J].天津大学学报,2012,45( 10):875-880.ZHU Jia-ling,LI Hui,ZHANG Wei.Numerical simulation and system optimization of spiral tube phase change heat storage process [J].Journal of Tianjin University,2012,45(10):875-880.(in Chinese)
[5] 张红瑞.空调废热回收热泵关键技术的研究 [D].济南:山东建筑大学,2010.ZHANG Hong-rui.Research on Key Technologies of Air-conditioning Waste Heat Recovery Heat Pump [D].Jinan:Shandong Jianzhu University,2010.(in Chinese)
[6] 廖海蛟,凌祥.高温肋板式蓄热器蓄/放热特性的数值模拟 [J].太阳能学报,2010,31(3):345-350.LIAO Hai-jiao,LING Xiang.Numerical simulation of storage/discharge characteristics of high temperature ribbed regenerator [J].Journal of Solar Energy,2010,31(3):345-350.(in Chinese)
[7] 贺鹏,冯毅.相变蓄热体的热工特性数值模拟 [J].低温与超导,2012,40(11):80-84.HE Peng,FENG Yi.Numerical simulation of thermal characteristics of phase change thermal storage [J].Cryogenics and Superconductivity,2012,40(11):80-84.(in Chinese)
[8] 叶三宝,刁彦华,赵耀华.新型平板热管相变蓄热器蓄放热性能分析 [J].电力建设,2014,35(7):136-140.YE San-bao,DIAO Yan-hua,ZHAO Yao-hua.Analysis of heat storage and release performance of a new flat-plate heat pipe phase change regenerator [J].Electric Power Construction,2014,35(7):136-140.(in Chinese)
[9] HAWLADER M N A,UDDIN M S,ZHU H J.Encapsulated phase change materials for thermal energy storage:experiments and simulation [J].International Journal of Energy Research,2002,26(2):159-171.
[10] 刘津丞,袁益超,徐世祥,等.H形鳍片片管束传热与阻力特性实验研究 [J].上海理工大学学报,2004,26(5):457-460.LIU Jin-cheng,YUAN Yi-chao,XU Shi-xiang,et al.Experimental study on heat transfer and resistance characteristics of H-shaped finned tube bundles [J].Journal of Shanghai University of Science and Technology,2004,26(5):457-460.(in Chinese)
[11] YAO Y,WU H,LIU Z.A new prediction model for the effective thermal conductivity of high porosity open-cell metal foams [J].International Journal of Thermal Sciences,2015,97(01):56-67.
[12] KIM S,DRZAL L T.High latent heat storage and high thermal conductive phase change materials using exfoliated graphite nanoplatelets [J].Solar Energy Materials and Solar Cells,2009,93(2):136-142.
[13] WEING R D,KOPEC T C,FLEISCHER A S,et al.The experimental exploration of embedding phase change materials with graphite nanofibers for the thermal management of electronics [J].Heat Transfer,2006,80(2):120-126.
[14] 陈华,杨亚星.直接蒸发式与串联式独立新风空调系统性能实验研究 [J].热科学与技术,2017,16(4):330-336.CHEN Hua,YANG Ya-xing,et al.Experimental study on performance of direct evaporative and tandem independent fresh air air conditioning system [J].Journal of Thermal Science and Technology,2017,16(4):330-336.(in Chinese)
[15] YANG X P,YANG X X,DING J,et al.The thermal analysis of porous medium for high-temperature thermal storage [J].Journal of Engineering Thermophysics,2012,33(3):477-480 (in Chinese)
[16] YAO Y,WU H,LIU Z.A new prediction model for the effective thermal conductivity of high porosity open-cell metal foams [J].International Journal of Thermal Science,2015,97(10):56-67.(in Chinese)
[2] 史德福,陈华,黄耀坤.带冷凝热回收的家用空调器的研究 [J].低温与超导,2012,40( 5):63-67.SHI De-fu,CHEN Hua,HUANG Yao-kun.Research on household air conditioners with condensation heat recovery [J].Cryogenic and Superconducting,2012,40(5):63-67.(in Chinese)
[3] 周楚,陈华,史德福,等.相变蓄热式热泵热水器性能实验研究 [J].建筑科学,2014,30(4):5-9.ZHOU Chu,CHEN Hua,SHI De-fu,et al.Experimental study on the performance of phase change regenerative heat pump water heater [J].Building Science,2014,30(4):5-9.(in Chinese)
[4] 朱家玲,李慧,张伟.螺旋管式相变蓄热过程的数值模拟与系统优化 [J].天津大学学报,2012,45( 10):875-880.ZHU Jia-ling,LI Hui,ZHANG Wei.Numerical simulation and system optimization of spiral tube phase change heat storage process [J].Journal of Tianjin University,2012,45(10):875-880.(in Chinese)
[5] 张红瑞.空调废热回收热泵关键技术的研究 [D].济南:山东建筑大学,2010.ZHANG Hong-rui.Research on Key Technologies of Air-conditioning Waste Heat Recovery Heat Pump [D].Jinan:Shandong Jianzhu University,2010.(in Chinese)
[6] 廖海蛟,凌祥.高温肋板式蓄热器蓄/放热特性的数值模拟 [J].太阳能学报,2010,31(3):345-350.LIAO Hai-jiao,LING Xiang.Numerical simulation of storage/discharge characteristics of high temperature ribbed regenerator [J].Journal of Solar Energy,2010,31(3):345-350.(in Chinese)
[7] 贺鹏,冯毅.相变蓄热体的热工特性数值模拟 [J].低温与超导,2012,40(11):80-84.HE Peng,FENG Yi.Numerical simulation of thermal characteristics of phase change thermal storage [J].Cryogenics and Superconductivity,2012,40(11):80-84.(in Chinese)
[8] 叶三宝,刁彦华,赵耀华.新型平板热管相变蓄热器蓄放热性能分析 [J].电力建设,2014,35(7):136-140.YE San-bao,DIAO Yan-hua,ZHAO Yao-hua.Analysis of heat storage and release performance of a new flat-plate heat pipe phase change regenerator [J].Electric Power Construction,2014,35(7):136-140.(in Chinese)
[9] HAWLADER M N A,UDDIN M S,ZHU H J.Encapsulated phase change materials for thermal energy storage:experiments and simulation [J].International Journal of Energy Research,2002,26(2):159-171.
[10] 刘津丞,袁益超,徐世祥,等.H形鳍片片管束传热与阻力特性实验研究 [J].上海理工大学学报,2004,26(5):457-460.LIU Jin-cheng,YUAN Yi-chao,XU Shi-xiang,et al.Experimental study on heat transfer and resistance characteristics of H-shaped finned tube bundles [J].Journal of Shanghai University of Science and Technology,2004,26(5):457-460.(in Chinese)
[11] YAO Y,WU H,LIU Z.A new prediction model for the effective thermal conductivity of high porosity open-cell metal foams [J].International Journal of Thermal Sciences,2015,97(01):56-67.
[12] KIM S,DRZAL L T.High latent heat storage and high thermal conductive phase change materials using exfoliated graphite nanoplatelets [J].Solar Energy Materials and Solar Cells,2009,93(2):136-142.
[13] WEING R D,KOPEC T C,FLEISCHER A S,et al.The experimental exploration of embedding phase change materials with graphite nanofibers for the thermal management of electronics [J].Heat Transfer,2006,80(2):120-126.
[14] 陈华,杨亚星.直接蒸发式与串联式独立新风空调系统性能实验研究 [J].热科学与技术,2017,16(4):330-336.CHEN Hua,YANG Ya-xing,et al.Experimental study on performance of direct evaporative and tandem independent fresh air air conditioning system [J].Journal of Thermal Science and Technology,2017,16(4):330-336.(in Chinese)
[15] YANG X P,YANG X X,DING J,et al.The thermal analysis of porous medium for high-temperature thermal storage [J].Journal of Engineering Thermophysics,2012,33(3):477-480 (in Chinese)
[16] YAO Y,WU H,LIU Z.A new prediction model for the effective thermal conductivity of high porosity open-cell metal foams [J].International Journal of Thermal Science,2015,97(10):56-67.(in Chinese)