Abstract
This paper shows the results of a novel research conducted with the overall aim of developing a system that can provide continuous desalination. Productivity enhancement of solar stills is regarded as the main purpose of the investigators in desalination field. This paper represents the experimental results in a new approach of paraffin + graphene oxide nanoparticles mixture. The paraffin mixture in a semicircular, triangular and rectangular absorber with paraffin + graphene oxide of 0.1, 0.3 and 0.5 mass% has been investigated. The finding indicated that for all absorbers, the use of paraffin + graphene oxide in higher mass fractions enhances daily freshwater production. The results showed that the thermal performances are greater applying graphene oxide + paraffin of 0.5 mass% with semicircular absorber compared to triangular and rectangular absorber. The achievement of the present paper can be implemented to design more efficient absorbers for solar still parts.
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Abbreviations
- b :
-
Constant of Brownian motion (5 × 104)
- c p :
-
Heat capacity (J kg−1 K−1)
- d np :
-
Diameter of nanoparticles (nm)
- f :
-
Liquid fraction
- k :
-
Thermal conductivity (W m−1 K−1)
- K :
-
Constant of Boltzmann (1.381 × 10–23 J K−1)
- w :
-
Width (m)
- T :
-
Temperature (°C or K)
- h :
-
Coefficient of heat transfer (Wm−2 K−1)
- h w :
-
Coefficient of heat transfer due to wind (W m−2 K−1)
- L :
-
Latent heat of water vaporization (kJ kg−1)
- \(\dot{m}_{{\text{e,w}}}\) :
-
Fresh water (kgm−2 day−1
- γ :
-
Brownian motion parameter
- \(\rho\) :
-
Density (kgm−3)
- \(\mu\) :
-
Dynamic viscosity (kgm−1 s−1)
- \(\emptyset\) :
-
Volume fraction of nanoparticles
- a:
-
Ambient air
- b:
-
Basin
- cond:
-
Conduction
- conv:
-
Convection
- np:
-
Nanoparticles
- nepcm:
-
Nanoparticle-enhanced phase changed materials (Nano + PCM)
- pcm:
-
Phase changed materials
- e:
-
Evaporation
- i:
-
Inner
- g:
-
Glass
- l:
-
Liquid
- p:
-
Plate
- r:
-
Radiation
- ref:
-
Reference
- w:
-
Water
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Goshayeshi, H.R., Chaer, I., Yebiyo, M. et al. Experimental investigation on semicircular, triangular and rectangular shaped absorber of solar still with nano-based PCM. J Therm Anal Calorim 147, 3427–3439 (2022). https://doi.org/10.1007/s10973-021-10728-z
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DOI: https://doi.org/10.1007/s10973-021-10728-z