Experimental performance analysis of beeswax/expanded graphite composite for thermal energy storage in a shell and tube unit

被引：7

作者：

Dinker, Abhay ^{[1
]}

Agarwal, Madhu ^{[1
]}

Das Agarwal, Ghanshyam ^{[2
]}

机构：

[1] MNIT, Dept Chem Engn, Jaipur 302017, RJ, India

[2] MNIT, Dept Mech Engn, Jaipur, RJ, India

来源：

INTERNATIONAL JOURNAL OF GREEN ENERGY | 2018年 / 15卷 / 11期

关键词：

Beeswax; expanded graphite; latent heat storage; phase change material; thermal conductivity; PHASE-CHANGE MATERIAL; HEAT-TRANSFER; MECHANICAL-PROPERTIES; PROPERTY MEASUREMENT; PARAFFIN WAX; BEESWAX; CONDUCTIVITY; ENHANCEMENT; SYSTEM; PCM;

D O I：

10.1080/15435075.2018.1525551

中图分类号：

O414.1 [热力学];

学科分类号：

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.

引用

页码：585 / 595

页数：11

共 60 条

[1] Performance enhancement of high temperature latent heat thermal storage systems using heat pipes with and without fins for concentrating solar thermal power plants [J].