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首页> 外文期刊>International journal of green energy >Experimental performance analysis of beeswax/expanded graphite composite for thermal energy storage in a shell and tube unit
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Experimental performance analysis of beeswax/expanded graphite composite for thermal energy storage in a shell and tube unit

机译：蜂蜡/膨胀石墨复合材料在管壳式单元中储热的实验性能分析

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摘要

In this study, pure beeswax and its novel composite with expanded graphite (10% wt.) were tested for thermal storage efficiency in a rectangular shell and helical tube storage unit. Low thermal conductivity of beeswax is improved by adding expanded graphite of 10% wt. Thermal characterization of beeswax and its composite was performed using differential scanning calorimetry and thermogravimetric analysis. Effect of hot fluid flow rates (0.25 liter per minute [LPM], 0.5 LPM, and 1.0 LPM) and inlet temperatures (60oC, 70oC, and80oC) on the charging time of beeswax and its composite was studied and compared. Charging time of beeswax and its composite reduced with an increase in fluid flow rate and inlet temperature. At 0.5 LPM flow rate and 80 degrees C inlet fluid temperature, the charging time of composite was reduced by 630min as compared to pure beeswax. Smaller charging time, improved thermal conductivity, and better thermal storage efficiency of composite material suggest it as a useful storage material fora wider range of applications.
机译：在这项研究中，测试了纯蜂蜡及其与膨胀石墨（重量百分比为10％）的新型复合材料在矩形壳体和螺旋管存储单元中的储热效率。蜂蜡的低热导率可通过添加10％wt的膨胀石墨来改善。使用差示扫描量热法和热重分析法对蜂蜡及其复合材料进行热表征。研究并比较了热流体流速（0.25升每分钟[LPM]，0.5 LPM和1.0 LPM）和入口温度（60oC，70oC和80oC）对蜂蜡及其复合材料的充电时间的影响。蜂蜡及其混合物的装料时间随着流体流速和入口温度的增加而减少。与纯蜂蜡相比，在0.5 LPM流速和80摄氏度入口流体温度下，复合材料的装料时间减少了630分钟。复合材料的充电时间更短，导热性更高，储热效率更高，这表明它是广泛应用中的有用储热材料。

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