Energy storage enhancement of paraffin with a solar-absorptive rGO@Ni film in a controllable magnetic field

被引：17

作者：

Yan, Shengnan ^{[1
,2
]}

Li, Zhenggui ^{[1
,2
]}

Liu, Xiaobing ^{[1
,2
]}

Chen, Fang ^{[1
,2
]}

Li, Wangxu ^{[1
,2
]}

Cheng, Jie ^{[1
,2
]}

机构：

[1] Xihua Univ, Key Lab Fluid & Power Machinery, Minist Educ, Chengdu 610039, Peoples R China

[2] Xihua Univ, Key Lab Fluid Machinery & Engn, Chengdu 610039, Sichuan, Peoples R China

来源：

ENERGY CONVERSION AND MANAGEMENT | 2022年 / 251卷

基金：

中国国家自然科学基金;

关键词：

Magnetic; rGO@Ni foam; Photothermal; Phase change; Energy-storage; PHASE-CHANGE MATERIALS; THERMAL-CONVERSION; GRAPHENE;

D O I：

10.1016/j.enconman.2021.114938

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Magnetically driven photothermal conversion and energy storage techniques can enhance the energy storage performance of phase change materials (PCMs) and thus have immense potential in energy applications. Paraffin is a common PCM that melts slowly and has poor rate of heat storage capacity. In this study, the effect of a controllable magnetic field on the photothermal and heat storage properties of paraffin was investigated. First, a reduced-graphene-oxide/nickel foam (rGO@Ni foam) composite film with good photothermal ability, corrosion resistance, and oxidation resistance was prepared, and photothermal conversion and energy storage processes under different magnetic fields were experimentally studied. The movement of the composite film could be adjusted by the action of magnetic force, especially to enhance the phase interface movement, accelerate paraffin melting, and improve the photothermal capacity and heat storage characteristics of the material. The composite film and phase interface could be dynamically tuned by regulating the magnetic field, thus enhancing the photothermal conversion effect. In particular, with increasing magnetic field strength, the thermal energy storage efficiency and speed of phase interface movement increased by 29% and 50%, respectively. The proposed magnetic force-driven method will enhance solar energy conversion and promote direct solar energy applications.

引用

页数：13

共 53 条

[1] Phase change material-integrated latent heat storage systems for sustainable energy solutions [J].