Experimental Study of Water-Based Al2O3Nanofluid Flow in Direct Absorption Solar Collector

2015 ◽  
Vol 357 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Hemant Kumar Gupta ◽  
Ghanshyam Das Agrawal ◽  
Jyotirmay Mathur
Keyword(s):  
Experimental Study ◽  
Solar Collector ◽  
Direct Absorption ◽  
Water Based ◽  
Direct Absorption Solar Collector

Performance of a tubular direct absorption solar collector with a carbon-based nanofluid

2021 ◽  
Vol 179 ◽  
pp. 121717
Author(s):  
P.G. Struchalin ◽  
V.S. Yunin ◽  
K.V. Kutsenko ◽  
O.V. Nikolaev ◽  
A.A. Vologzhannikova ◽  
...  
Keyword(s):  
Solar Collector ◽  
Direct Absorption ◽  
Direct Absorption Solar Collector ◽  
Carbon Based

scholarly journals Performance Investigation of High Temperature Application of Molten Solar Salt Nanofluid in a Direct Absorption Solar Collector

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 285 ◽  
Author(s):  
M. Karim ◽  
Owen Arthur ◽  
Prasad Yarlagadda ◽  
Majedul Islam ◽  
Md Mahiuddin
Keyword(s):  
High Temperature ◽  
Molten Salt ◽  
Solar Collector ◽  
Volume Fraction ◽  
Heat Transfer Fluid ◽  
Total Efficiency ◽  
Total System ◽  
Direct Absorption ◽  
Wide Range ◽  
Direct Absorption Solar Collector

Nanofluids have great potential in a wide range of fields including solar thermal applications, where molten salt nanofluids have shown great potential as a heat transfer fluid (HTF) for use in high temperature solar applications. However, no study has investigated the use of molten salt nanofluids as the HTF in direct absorption solar collector systems (DAC). In this study, a two dimensional CFD model of a direct absorption high temperature molten salt nanofluid concentrating solar receiver has been developed to investigate the effects design and operating variables on receiver performance. It has been found that the Carnot efficiency increases with increasing receiver length, solar concentration, increasing height and decreasing inlet velocity. When coupled to a power generation cycle, it is predicted that total system efficiency can exceed 40% when solar concentrations are greater than 100×. To impart more emphasis on the temperature rise of the receiver, an adjusted Carnot efficiency has been used in conjunction with the upper temperature limit of the nanofluid. The adjusted total efficiency also resulted in a peak efficiency for solar concentration, which decreased with decreasing volume fraction, implying that each receiver configuration has an optimal solar concentration.

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