used as recycle fluids for collectors with direct absorption of solar energy
were prepared by the “two-step method”. The photothermal conversion properties of the two kinds of nanofluids and their base fluids were studied
the temperature changing with the environmental temperature through the insolation experiment. The results show that Al-nanofluids have higher rise velocity and insolation temperature than the base fluids and Carbon Nanotube Nanofluids
and that when the insolation temperature is stable
the insolation temperature of Al-nanofluids is nearly 25 ℃ higher than that of the base fluids and 10 ℃ higher than that of the Carbon Nanotube Nanofluids. Thus
Al-nanofluids show better photo-thermal conversion properties.
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references
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