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首页> 外文期刊>Experimental Heat Transfer >Experimental thermal performance study of natural graphite as sensible heat storage material using different heat transfer fluids
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Experimental thermal performance study of natural graphite as sensible heat storage material using different heat transfer fluids

机译：使用不同传热流体的天然石墨作为显热储能材料的热性能实验研究

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In this paper thermal performance of graphite-based sensible heat storage system with embedded helical coil in rectangular shell was studied. Plain water at four flow rates (0.25 LPM-1.0 LPM) and four inlet temperatures (60 degrees C-90 degrees C) was passed through the graphite bed and charging time was measured. Expanded graphite/water suspension and Al2O3/water nanofluid were also used to study charging behavior of graphite. Results showed that charging time of packed bed was reduced with increase in flow rate and inlet temperature of heat transfer fluid. Charging time using expanded graphite/water solution and nanofluid was 14.2% and 21.2% lesser than water.Abbreviations: h(i:) internal heat transfer coefficient (W m(-2) K-1); HTF: Heat transfer fluid; h(o): External heat transfer coefficient (W m(-2) K-1); LPM: liter per minute; k: thermal conductivity (W m(-1) K-1); TSU: Thermal storage unit
机译：本文研究了矩形壳内嵌有螺旋线圈的石墨基显热储能系统的热性能。使具有四个流速（0.25 LPM-1.0 LPM）和四个入口温度（60摄氏度-90摄氏度）的纯水通过石墨床，并测量装料时间。还使用膨胀的石墨/水悬浮液和Al2O3 /水纳米流体来研究石墨的充电行为。结果表明，随着传热流体流速和入口温度的增加，填充床的装料时间减少。使用膨胀石墨/水溶液和纳米流体的充电时间比水缩短了14.2％和21.2％。缩写：h（i :)内部传热系数（W m（-2）K-1）； HTF：传热流体； h（o）：外部传热系数（W m（-2）K-1）； LPM：每分钟升； k：导热系数（W m（-1）K-1）； TSU：蓄热单元

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