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Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)

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Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)

Editor

ISBN:

9780791802908

No. of Pages:

1200

DOI:

https://doi.org/10.1115/1.802908

Publisher:

ASME Press

Publication date:

2009

eBook Chapter

108 Preparation and Thermal Property of Phase Change Nanocomposites Using Carbon Nanotubes as Additives

By

Jifen Wang

School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, China

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,

Huaqing Xie

School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, China

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,

Zhong Xin

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China

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,

Yang Li

School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, China

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,

Huijie Dong

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China

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Doi:

https://doi.org/10.1115/1.802908.paper108

Page Count:

7

Published:

2009

Phase change nanocomposites were prepared by dispersing pretreated multi-walled carbon nanotubes (CNTs) into melting paraffin wax (PW). Intensive sonication was used to make well dispersed and homogeneous composites. The thermal properties have been investigated using differential scanning calorimetric (DSC) and transient short-hot-wire method. The latent heat thermal energy storage capacity, L_s and melting point , T_m of the nanocomposites decreases with the mass fraction of CNTs, ϕ_w. The nanocomposite with CNT mass fraction of 2% lowers T_m by about 1°C and decreases L_s by about 2kJ∕kg, compared with pure PW. The thermal conductivity of the nanocomposites increases with ϕ_w in both liquid state and solid state, away from the melting point. The thermal conductivity of the nanocomposite with 2wt% CNTs is higher than that of the pure PW by more than 30% in both liquid state and solid state. And it is about 0.33 W∕mK in solid state.

Abstract

Introduction

1. Introduction

2. Experimental

3. Results and Discussion

4. Conclusions

Acknowledgments

References

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