References
  -  G.N. Tiwari, Solar Energy: Fundamentals, Design, Modelling
    and Applications, Narosa Publishing House, India, 2016. 
-  C. Akshay, P. Soni, S.K. Dhiman, S. Bhowmick, V.K. Gaba,
    Thermal modelling of single and double slope passive solar
    stills for different climatic zones in India, Int. J. Ambient Energy,
    (2021), doi:10.1080/01430750.2021.1946147. 
-  M.E.A. Elaziz, F.A. Essa, A.H. Elsheikh, Utilization of ensemble
    random vector functional link network for freshwater
    prediction of active solar stills with nanoparticles, Sustainable
    Energy Technol. Assess., 47 (2021) 101405, doi: 10.1016/j.
    seta.2021.101405. 
-  F.A. Essa, Z.M. Omara, A.S. Abdullah, A.E. Kabeel,
    G.B. Abdelaziz, Enhancing the solar still performance via
    rotating wick belt and quantum dots nanofluid, Case Stud.
    Therm. Eng., 27 (2021) 101222, doi:10.1016/j.csite.2021.101222. 
-  F.A. Essa, F.S. Abou-Taleb, M.R. Diab, Experimental investigation
    of vertical solar still with rotating discs, Energy Sources Part A,
    27 (2021) 101222, doi: 10.1016/j.csite.2021.101222. 
-  A.S. Abdullah, Z.M. Omara, F.A. Essa, A. Alarjani, I.B. Mansir,
    M.I. Amro, Enhancing the solar still performance using
    reflectors and sliding-wick belt, Sol. Energy, 214 (2021) 268–279. 
-  H. Tanaka, Y. Nakatake, Improvement of the tilted wick solar
    still by using a flat plate reflector, Desalination, 216 (2007)
    139–146. 
-  K.M. Bataineh, M.A. Abbas, Performance analysis of solar
    still integrated with internal reflectors and fins, Sol. Energy,
    205 (2020) 22–36. 
-  L. Wang, X. Ma, Y. Zhao, R. Jin, H. Zheng, Performance study
    of a passive vertical multiple-effect diffusion solar still directly
    heated by parabolic concentrator, Renewable Energy, 182 (2022)
    855–866. 
-  A.N. Shmroukh, S. Ookawara, Evaluation of transparent
    acrylic stepped solar still equipped with internal and external
    reflectors and copper fins, Therm. Sci. Eng. Prog., 18 (2020)
    100518, doi:10.1016/j.tsep.2020.100518. 
-  G. Palanikumar, S. Shanmugan, V. Chithambaram, S. Gorjian,
    C.I. Pruncu, F.A. Essa, P. Selvaraju, Thermal Investigation
    of a Solar Box-type Cooker with Nanocomposite Phase
    Change Materials Using Flexible Thermography. Ren. Energy,
    178 (2021), 260–282, doi.org/10.1016/j.renene.2021.06.022 
-  K. Elmaadawy, A.W. Kandeal, A. Khalil, M.R. Elkadeem, B. Liu,
    S.W. Sharshir, Performance improvement of double slope solar
    still via combinations of low cost materials integrated with
    glass cooling, Desalination, 500 (2021) 114856, doi: 10.1016/j.
    desal.2020.114856. 
-  M. Abu-Arabi, M. Al-Harahsheh, M. Ahmad, H. Mousa,
    Theoretical modeling of a glass-cooled solar still incorporating
    PCM and coupled to flat plate solar collector, J. Energy Storage,
    29 (2020) 101372, doi:10.1016/j.est.2020.101372. 
-  Z.M. Omara, A.S. Abdullah, A.E. Kabeel, F.A. Essa, The cooling
    techniques of the solar stills’ glass covers – 
 a review, Renewable
    Sustainable Energy Rev., 78 (2017) 176–193.
-  B.A. Abu-Hijleh, H.A. Mousa, Water film cooling over the glass
    cover of a solar still including evaporation effects, Energy,
    22 (1997) 43–48. 
-  B.A.K. Abu-Hijleh, Enhanced solar still performance using
    water film cooling of the glass cover, Desalination, 107 (1996)
    235–244. 
-  Y.A.F. El-Samadony, A.E. Kabeel, Theoretical estimation
    of the optimum glass cover water film cooling parameters
    combinations of a stepped solar still, Energy, 68 (2014),
    doi: 10.1016/j.energy.2014.01.080. 
-  L.D. Jathar, S. Ganesan, Assessing the performance of concave
    type stepped solar still with nanoparticles and condensing
    cover cooling arrangement: an experimental approach,
    Groundwater Sustainable Dev., 12 (2021) 100539, doi: 10.1016/j.
    gsd.2020.100539. 
-  V. Dimri, B. Sarkar, U. Singh, G.N. Tiwari, Effect of condensing
    cover material on yield of an active solar still: an experimental
    validation, Desalination, 227 (2008) 178–189, doi: 10.1016/j.
    desal.2007.06.024. 
-  G.N. Tiwari, A.K. Mishra, M. Meraj, A. Ahmad, M.E. Khan,
    Effect of shape of condensing cover on energy and exergy
    analysis of a PVT-CPC active solar distillation system, Sol.
    Energy, 205 (2020) 113–125, doi:10.1016/j.solener.2020.04.084. 
-  M. Bhargva, A. Yadav, Effect of shading and evaporative cooling
    of glass cover on the performance of evacuated tube-augmented
    solar still, Environ. Dev. Sustainability, 22 (2020) 4125–4143. 
-  S. Shoeibi, N. Rahbar, A.A. Esfahlani, H. Kargarsharifabad,
    Energy matrices, exergoeconomic and enviroeconomic
    analysis of air-cooled and water-cooled solar still: experimental
    investigation and numerical simulation, Renewable Energy,
    171 (2021) 227–244. 
-  S. Shoeibi, N. Rahbar, A.A. Esfahlani, H. Kargarsharifabad,
    A review of techniques for simultaneous enhancement of
    evaporation and condensation rates in solar stills, Sol. Energy,
    225 (2021) 666–693. 
-  A.K. Tiwari, G.N. Tiwari, Annual performance analysis and
    thermal modelling of passive solar still for different inclinations
    of condensing cover, Int. J. Energy Res., 31 (2007) 1358–1382. 
-  R. Dev, G.N. Tiwari, Characteristic equation of the inverted
    absorber solar still, Desalination, 269 (2011) 67–77. 
-  G.N. Tiwari, S. Suneja, Performance evaluation of an inverted
    absorber solar still, Energy Convers. Manage., 39 (1998) 173–180. 
-  G.N. Tiwari, S. Suneja, Thermal analysis of an inverted absorber
    solar still for higher yield, Int. J. Sol. Energy, 20 (1999) 111–127. 
-  S. Suneja, G.N. Tiwari, Parametric study of an inverted absorber
    triple effect solar still, Energy Convers. Manage., 40 (1999)
    1871–1884. 
-  S.A. Abdul-Wahab, A.M. Al-Damkhi, H. Al-Hinai, R. Dev,
    G.N. Tiwari, Experimental study of an inverted absorber solar
    still, Desal. Water Treat., 19 (2010) 249–254. 
-  K.N. Mishra, M. Meraj, A.K. Tiwari, G.N. Tiwari, Performance
    evaluation of PVT-CPC integrated solar still under natural
    circulation, Desal. Water Treat., 156 (2019) 117–125.