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Table 1 Summary of the previous published works and present work in salt-based nanofluids

From: Increment of specific heat capacity of solar salt with SiO2 nanoparticles

Authors Year Salt composition Nanoparticles Preparation method Results Ref
Shin and Banerjee 2011 Li2CO3 (62%) + K2CO3 (38%) SiO2 (10 nm), 1% wt. Salt + water (1:100) Cp: +19% to +24% [10]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (200°C)
Shin and Banerjee 2011 BaCl2 (34%) + NaCl (13%) + CaCl2 (40%) + LiCl (13%) SiO2, 1% wt. Salt + water (1:100) Cp: +14.5% [16]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (200°C)
Lu and Huang 2013 NaNO3 (60%) + KNO3 (40%) Al2O3 (13 nm, 90 nm), 0.9% to 4.6% wt. Salt + water (1:100) Cp: -10%, 4.6% wt. [17]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (105°C)
Tiznobaik and Shin 2013 Li2CO3 (62%) + K2CO3 (38%) SiO2 (5 to 60 nm), 1% wt. Salt + water (1:100) Cp: +23% to +29% [11]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (200°C)
Tiznobaik and Shin 2013 Li2CO3 (62%) + K2CO3 (38%) SiO2 (10 nm), 1% wt. Salt + water (1:100) Cp: +26% [12]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (200°C) Cp: +3% (addition NaOH)
Shin and Banarjee 2013 Li2CO3 (62%) + K2CO3 (38%) SiO2 (2 to 20 nm), 1% wt. Salt + water (1:100) Segregation [13]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (100°C) Cp: +124% (zone A)
Cp: +0% (zone B)
Dudda and Shin 2013 NaNO3 (60%) + KNO3 (40%) SiO2 (5 nm, 10 nm, 30 nm, 60 nm), 1% wt. Salt + water (1:100) Cp: +10% (5 nm) +13% (10 nm), +21% (30 nm), +28% (60 nm) [18]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (200°C)
Chieruzzi et al. 2013 NaNO3 (60%) + KNO3 (40%) SiO2 (7 nm), Al2O3 (13 nm), TiO2 (20 nm), SiO2 + Al2O3(2 to 200 nm), 0.5% to 1.5% wt. Salt + water (1:100) Cp: +22.5% (SiO2 + Al2O3 (2 to 200 nm 1.0% wt.)) [19]
Nanoparticle dispersion in ultrasonic bath (100 min). Drying in hot plate (200°C) H: +15% (all np except TiO2, 1% wt.)
Jo and Banarjee 2014 Li2CO3 (62%) + K2CO3 (38%) Graphite (50 nm) + gum arabic Salt + water (1:100) Segregation [14]
Nanoparticle dispersion in ultrasonic bath (120 min). Drying in hot plate (200°C) Cp: +100% (material 1)
Cp: +33% (material 2)
Shin and Banarjee 2014 Li2CO3 (62%) + K2CO3 (38%) Al2O3 (10 nm), 1% wt. Salt + water (1:100) Cp:+32% [15]
Nanoparticle dispersion in ultrasonic bath (120 min). Drying in hot plate (100°C)
Ho and Pan 2014 NaNO3 (7%) + KNO3 (53%) + NaNO2 (40%) Al2O3 (<50 nm), 0.016% to 1% wt. Salt + nanoparticle aqueous suspension (20% wt.) Cp: +19.9% (0.063% wt.) [20]
Nanoparticle dispersion by mechanic stirring at high temperature (180 min.)
Present work   NaNO3 (60%) + KNO3 (40%) SiO2 (12 nm), 0.5% to 2.0% wt. Salt + water (1:10) Cp: +25% (1.0% wt.) -
Nanoparticle dispersion in ultrasonic probe (5 min). Drying in hot plate (100°C)