Influence of iron foam on paraffin phase change heat storage process

doi:10.12028/j.issn.2095-4239.2019.0161

Abstract

Abstract:

The development of energy storage materials can improve the solar energy utilization efficiency. Paraffin wax is a phase change energy storage material that exhibits high heat storage density and latent heat of phase change but low thermal conductivity. Iron foam was used to enhance the thermal conductivity of the paraffin-based phase change energy storage materials (PCMs). Further, the thermal storage properties of paraffin and iron foam/paraffin composite PCM were investigated through by preparing PCMs of different thickness and by testing the temperature increase at a drying medium temperature of 70 °C. The results reveal that the addition of iron foam can effectively improve the thermal conductivity of the iron foam/paraffin composite PCM, increase the heat transfer rate, and reduce the heat transfer duration. When compared with the control group, the mass fractions of paraffin in the composite (with thicknesses of 10 and 15 mm) decreased by 5.56% and 3.68%, respectively, and the time of phase change commencement was reduced by 15 and 17 min, respectively. The phase change duration was reduced by 42 and 31 min, respectively. The heat storage densities of the 10- and 15-mm composite PCM were 139.75 and 143.85 J·cm^-3, respectively, which were 8.81% and 8.01% lower than those of the control group. The heat storage rates were 3.05 and 3.96 J·s^-1, respectively, which were 1.22 and 1.11 times higher than those of the corresponding control group.

Key words: phase change energy storage materials, paraffin, iron foam, heat storage density, heat storage rate

CLC Number:

TK 02

WAN Qian, XIAO Haonan, QIAN Jing, HE Zhengbin, YI Songlin. Influence of iron foam on paraffin phase change heat storage process[J]. Energy Storage Science and Technology, 2020, 9(1): 94-100.

Figures/Tables 10

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序号	设备名称	型号	生产厂家
1	智能型电热板	SKML-1.5-4	北京昶信科技发展有限公司
2	干燥箱	BPG-9050AH	北京汇安铭科科技发展有限公司
3	温度巡检仪	XSL/D-16ES2V0	北京中旺新业电子技术有限公司
4	传感器	K型铜-康铜热电偶	北京航科金星自动化仪表有限公司
5	导热系数测量仪	DRE-2C	湘潭市仪器有限公司
6	差示扫描量热仪	Q2000	American TA Company

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