Experimental investigation of an asymmetric compound parabolic concentrator–based direct absorption solar collector using plasmonic nanofluids

Singh, Parminder; Chander, Nikhil; Bagha, Ashok Kumar

doi:10.1007/s11356-023-26747-2

Cited by 8 publications

(1 citation statement)

References 69 publications

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“…However, some studies have been carried out through the dispersion of plasmonic [12][13][14][15][16][17], metal oxide [18][19][20][21][22], and nonmetallic NPs (nanoparticles) [23][24][25][26][27][28][29] for the direct absorption solar thermal collecting method because working fluids, such as water, antifreeze, and oil, generally used in the solar collector [30], possess large optical transmittance. The beneficial aspect of using NF for the direct absorption solar thermal collecting method is that it can improve both the heat transfer performance of the working fluid and the optical absorption performance [31,32]. Existing studies reported that solar absorbance over 98% in the optical length under 10 mm could be secured by various types of NPs [33].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Thermal Performance Influence on Design Parameter and Fe3O4 Nanofluid of Flat Plate Direct Absorption Solar Collector

Tong

Ham

Cho

2023

International Journal of Energy Research

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In this study, the influence of design factors (concentration of Fe3O4 nanofluid (NF), mass flow rate, FPDASC height, and emissivity of the receiver) of flat plate direct absorption solar collector (FPDASC) using Fe3O4 NF was investigated using the CFD (computational fluid dynamics) method. As a result, when the concentration of Fe3O4 NF increases up to 0.1 wt%, the thermal and exergy efficiencies increase by 0.773 and 0.0293, respectively, due to the increased optical absorbance. Increasing the mass flow rate of Fe3O4, NF decreases the outlet temperature; however, thermal efficiency increases due to reduced heat loss and improved heat transfer. Moreover, there is little effect on the irreversibility of the FPDASC due to the Bejan number with almost one, although the mass flow rate increases the pressure loss. The increasing height of the FPDASC and the emissivity of the receiver improve the thermal and exergy efficiencies in the case of water with low optical absorbance. In contrast, the increasing height of the FPDASC and the emissivity of the receiver decrease the thermal and exergy efficiencies when the optical absorbance is high (0.1 wt% Fe3O4 NF).

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