CHARACTERIZATION OF THERMAL RADIATIVE PROPERTIES OF NANOFLUIDS FOR SELECTIVELY ABSORPTION OF SOLAR RADIATION
Many kinds of nanofluids have been studied by researchers in thermal engineering. Previous research has shown that thermal conductivities of nanofluids can be improved significantly, compared with those of the base fluids. Hence, nanofluids have been applied to device cooling, heat pipes, and other applications. Because of the inherent nanoscale effects, thermal radiative properties of nanoparticles may be much different from those of bulk materials. In this paper, thermal radiative properties of various nanofluids are investigated and characteristics of selectively absorption of solar radiation by nanofluids are discussed. Several kinds of nanoparticles are prepared by the two-step method. Effects of dispersants, nanoparticle materials, and mass fractions on the radiative properties of nanofluids within the wavelength range of 300 nm-2500 nm are analyzed. Dispersants can reduce the transparency of water by around 12％ within the visible spectrum. The ZnO-water and AlN-water nanofluids selectively absorb solar radiation while the ZrC-water and TiN-water nanofluids can absorb most solar radiation. The findings of this work can provide a solid foundation for research on application of nanofluids in solar energy.
Nanofluids Thermal Radiative Properties Transmittance Reflectance
Qunzhi Zhu Yun Cui Lijuan Mu
School of Energy and Environment Engineering, Shanghai University of Electric Power
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
222-227
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）