Phase change materials (PCMs) for improving solar still productivity: a review

  • Adil A. M. OmaraEmail author
  • Abuelnuor A. A. Abuelnuor
  • Hussein A. Mohammed
  • Mehdi Khiadani


This paper comprehensively reviews the use of phase change materials (PCMs) as latent heat storage systems to improve the productivity of solar stills. Previous studies on enhancing the productivity of active and passive solar stills with PCM are also presented. These studies show that a passive solar still with PCM shows a productivity improvement of up to 120% compared with a solar still without PCM. Meanwhile, the productivity improvement of an active solar still with PCM could reach as high as 700%. These results indicate that productivity increases along with an increasing PCM mass and a decreasing saline water mass. The PCM is also observed to be less effective in daytime than in night-time. It is also shown that organic PCMs (such as paraffin) were mostly used in studies on productivity improvement, whilst very few studies have examined the effects of inorganic and eutectic types of PCM.


Solar still Productivity PCMs Desalination Thermal energy storage 



Thermal energy storage


Phase change materials


Latent heat storage


Nano-enhanced PCM


Shape-stabilised phase change material


Phase change energy storage mixture




Latent heat thermal energy storage system


Mass of phase change material


Mass of water


Flake graphite nanoparticles


Pin fins


Steel wood fibres


Compound parabolic concentrator


Concentric circular tubular solar still



The authors would like to thank the University of Khartoum for supporting this research.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of Mechanical Engineering, Faculty of EngineeringUniversity of KhartoumKhartoumSudan
  2. 2.Department of Mechanical Engineering, Faculty of EngineeringAl-Baha UniversityAl BahaSaudi Arabia
  3. 3.WA School of Mines-Minerals, Energy and Chemical EngineeringCurtin UniversityBentleyAustralia
  4. 4.School of EngineeringEdith Cowan UniversityJoondalupAustralia

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