Tyagi et al, [8] Tyagi et al. [8] have investigated theoretically the feasibility of
มีการสอบสวนในทางทฤษฎีความเป็นไปได้ของการใช้การดูดซึมโดยตรงnonconcentrating using a nonconcentrating direct absorption solar collector (DAC)
และเมื่อเทียบกับประสิทธิภาพการทำงานกับที่ของ and compared its performance with that of a conventional flatplate
ธรรมดาสะสม ของไหลนาโน collector. The AleH2O nanofluid was used as the
ถูกใช้เป็นสื่อกลางในการดูดซับ absorbing medium. They concluded that the absorption of incident
radiation of nanofluids by more than nine times over that of
pure water and the efficiency of a DAC using nanofluid as the
working fluid is up to 10% higher than that of a flat-plate collector.
Otanicar et al. [9] performed the experiments of photothermal
properties for nanofluids made from a variety of
nanoparticles (carbon nanotubes, graphite, and silver). They
presented an efficiency improvement up to 5% in solar thermal
collectors by utilizing the nanofluids as the absorption medium.
Taylor et al. [10] have studied the nanofluid optical property
characterization. In Taylor's research, the nanofluids that mixed
water and graphite, aluminum, copper, silver, titanium dioxide
nanoparticles were used as the absorbing medium. According to
the results of Taylor's study, over 95% of incoming sunlight can be
absorbed with the nanoparticle volume fractions less than
1 105. Sani et al. [11,12] have investigated the optical and
thermal properties of Single Wall Carbon Nanohorns (SWCNHs)
in view of their use as direct sunlight absorbers in solar thermal
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