氧化铜-碳纳米管/水混合纳米流体的光热性能

doi:10.16085/j.issn.1000-6613.2017-1414

化工进展 ›› 2018, Vol. 37 ›› Issue (06): 2125-2131.DOI: 10.16085/j.issn.1000-6613.2017-1414

氧化铜-碳纳米管/水混合纳米流体的光热性能

屈健, 张若梅, 田敏

江苏大学能源与动力工程学院, 江苏镇江 212000

收稿日期:2017-07-10 修回日期:2017-10-19 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: 屈健(1980-),男,博士,副教授,研究方向为纳微尺度传热和纳米流体光热转化。
作者简介:屈健(1980-),男,博士,副教授,研究方向为纳微尺度传热和纳米流体光热转化。E-mail:rjqu@mail.ujs.edu.cn。
基金资助:
国家自然科学基金面上项目（51576091）。

Photo-thermal properties of hybrid CuO-MWCNT/H₂O nanofluids

QU Jian, ZHANG Ruomei, TIAN Min

School of Energy and Power engineering, Jiangsu University, Zhenjiang 212000, Jiangsu, China

Received:2017-07-10 Revised:2017-10-19 Online:2018-06-05 Published:2018-06-05

摘要/Abstract

摘要： 采用微波加热法制备了氧化铜（CuO）/水纳米流体，并在质量分数0～0.25%的CuO/水纳米流体中添加不同质量分数的多壁碳纳米管（MWCNT）得到CuO-MWCNT/水混合纳米流体。借助分光光度计测试比较了不同浓度的CuO/水纳米流体和混合纳米流体的透射率随波长变化的情况，并通过闷晒实验对比研究了上述纳米流体的光热转换性能。结果发现，CuO/水纳米流体的透射率随着CuO质量分数的提高而下降，添加MWCNT可显著降低CuO/水纳米流体的透射率，混合纳米流体具有更好的光谱吸收特性。CuO/水纳米流体的光热转换性能随着CuO质量分数的提高而增强，与水相比光照45min后0.25%的CuO/水纳米流体温升提高了9.2℃。混合纳米流体的光热转化效果优于单一成分的CuO/水或MWCNT/水纳米流体，且与浓度大小密切相关：两种纳米材料浓度较低时，相互混合利于光热转化性能的提高；而当浓度较高时，添加某种纳米材料虽可以提高其光热转换性能，但添加浓度存在最佳值。本实验中，当CuO质量分数为0.05%和0.1%时，添加MWCNT的质量分数不宜超过0.005%；而当CuO质量分数继续增大为0.25%时，添加MWCNT质量分数不宜超过0.0015%，且存在最佳浓度。

关键词: 纳米流体, 太阳能集热器, 吸收特性, 光热转换性能

Abstract: Water-based CuO nanofluids were prepared by microwave heating method, and then multi-walled carbon nanotubes(MWCNTs) were dispersed into the aqueous suspensions of CuO to obtain hybrid CuO-MWCNT/H₂O nanofluids with the CuO concentration ranging from 0 to 0.25%. The transmittances of CuO/H₂O and hybrid nanofluids at different wavelengths were measured and compared, and their photo-thermal conversion performance were experimentally investigated as well. The results showed that the transmittances of CuO/H₂O nanofluids decreased with the increase of mass fraction, and a significant reduction of transmittance was achieved after the addition of MWCNTs, indicating better solar energy spectral absorption property of hybrid nanofluids as compared with single nanofluids. The photo-thermal conversion performance of CuO/H₂O nanofluids was enhanced with the increase of CuO concentration. Compared with deionized(DI) water, the temperature of CuO/H₂O nanofluids at a mass fraction of 0.25% was increased by 9.2℃ after a light irradiation time of 45min. Besides, the photo-thermal conversion performance of the hybrid nanofluids was superior to just CuO/H₂O or MWCNT/H₂O nanofluids and highly dependent on the nanomaterial concentration. In the present experiment, the mass fraction of added MWCNT should be less than 0.005% when the mass fraction of CuO was 0.05% or 0.1%, while the concentration of MWCNT should not exceed 0.0015% when the mass fraction of CuO was 0.25% and the optimal concentration of MWCNT with respect to best photo-thermal conversion performance was observed.

Key words: nanofluid, solar energy collector, absorption property, photo-thermal conversion performance

中图分类号:

TK512

屈健, 张若梅, 田敏. 氧化铜-碳纳米管/水混合纳米流体的光热性能[J]. 化工进展, 2018, 37(06): 2125-2131.

QU Jian, ZHANG Ruomei, TIAN Min. Photo-thermal properties of hybrid CuO-MWCNT/H₂O nanofluids[J]. Chemical Industry and Engineering Progress, 2018, 37(06): 2125-2131.

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氧化铜-碳纳米管/水混合纳米流体的光热性能

Photo-thermal properties of hybrid CuO-MWCNT/H₂O nanofluids

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氧化铜-碳纳米管/水混合纳米流体的光热性能

Photo-thermal properties of hybrid CuO-MWCNT/H2O nanofluids

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Photo-thermal properties of hybrid CuO-MWCNT/H₂O nanofluids