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通过实验研究了两步法制备的TiN-导热油纳米流体的辐射特性,测量了纳米流体的导热系数、常规透射率及半球透、反射率,还研究了质量分数以及光程对其透射率、反射率的影响。实验结果表明,质量分数为0.010%的TiN-导热油纳米流体对辐射能的吸收效果最好,吸收率为97%左右,且其导热系数大于基液的导热系数,可以在一定程度上提升太阳能集热器的集热效率。因此,其在太阳能的高效利用方面具有较好的潜力。
The radiation characteristics of the TiN-HTF nanofluids prepared by the two-step method were experimentally studied. The thermal conductivity, the normal transmittance and the hemispherical transmittance and reflectivity of the nanofluids were measured. The effects of mass fraction and optical path length on the transmittance, The influence of reflectivity. The experimental results show that the mass fraction of 0.010% TiN-HTF nanofluids is the best absorption of radiation energy, the absorption rate of about 97%, and its thermal conductivity is greater than the thermal conductivity of the base fluid, to a certain extent, to enhance solar energy Collector thermal efficiency. Therefore, it has good potential in the efficient use of solar energy.