References

1. A. AlHathal Al-Anezi, A.O. Sharif, M.I. Sanduk, A.R. Khan, Potential of membrane distillation —
   A comprehensive review, Int. J. Water, 7 (2013) 317–346.
2. A. Cipollina, M.G. Di Sparti, A. Tamburini, G. Micale, Development of a membrane distillation module for solar energy seawater desalination, Chem. Eng. Res. Design, 90 (2012) 2101–2121.
3. Y.-D. Kim, K. Thu, N. Ghaffour, K. Choon Ng, Performance investigation of a solar-assisted direct contact membrane distillation system, J. Membr. Sci., 427 (2013) 345–364.
4. M.R. Qtaishat, F. Banat, Desalination by solar powered membrane distillation systems, Desalination, 308 (2013) 186–197.
5. M. Shatat, S.B. Riffat, Water desalination technologies utilizing conventional and renewable energy sources, Int. J. Low-Carbon Technol., 9 (2014), 1–19.
6. N. Palanisami, K. He, I.S. Moon, Utilization of solar energy for direct contact membrane distillation process: An experimental study for desalination of real seawater, Korean J. Chem. Eng., 31 (2014) 155–161.
7. J. Koschikowski, M. Wieghaus, M. Rommel, Solar thermaldriven desalination plants based on membrane distillation, Desalination, 156 (2003) 295–304.
8. J. Koschikowski, M. Wieghaus, M. Rommel, V.S. Ortin, B.P. Suarez, J.R. Betancort Rodríguez, Experimental investigations on solar driven stand-alone membrane distillation systems for remote areas, Desalination, 248 (2009) 125–131.
9. R. Porrazzo, A. Cipollina, M. Galluzzo, G. Micale, A neural network-based optimizing control system for a seawaterdesalination solar-powered membrane distillation unit, Comp. Chem. Eng., 54 (2013) 79–96.
10. R. Schwantes, A. Cipollina, F. Gross, J. Koschikowski, D. Pfeifle, M. Rolletschek, V. Subiela, Membrane distillation: solar and waste heat driven demonstration plants for desalination, Desalination, 323 (2013) 93–106.
11. M.S. El-Bourawi, Z. Ding, R. Ma, M. Khayet, A framework for better understanding membrane distillation separation process, J. Membr. Sci., 285 (2006) 4–29.
12. Y.M.c. Manawi, M.a. Khraisheh, A.K.c. Fard, F.a. Benyahia, S. Adham, Effect of operational parameters on distillate flux in direct contact membrane distillation (DCMD): Comparison between experimental and model predicted performance, Desalination, 336 (2014) 110–120.
13. A. Ali, F. Macedonio, E. Drioli, S. Aljlild, O.A. Alharbi, Experimental and theoretical evaluation of temperature polarization phenomenon in direct contact membrane distillation, Chem. Eng. Res. Des., 91 (2013) 1966–1977.
14. L. Martínez-Diez, J.M. Rodríguez-Maroto, Temperature and concentration polarization in membrane distillation of aqueous salt solutions, J. Membr. Sci., 156 (1999) 265–273.
15. F. Laganà, G. Barbieri, E. Drioli, Direct contact membrane distillation: modelling and concentration experiments, J. Membr. Sci., 166 (2000) 1–11.
16. J. Zuo, S. Bonyadi, T.S. Chung, Exploring the potential of commercial polyethylene membranes for desalination by membrane distillation, J. Membr. Sci., 497 (2016) 239–247.
17. A.R. Da Costa, A.G. Fane, D.E. Wiley, Spacer characterization and pressure drop modelling in spacer filled channel for ultrafiltration, J. Membr. Sci., 87 (1994) 79–98.
18. G. Schock, A. Miquel, Mass transfer and pressure loss in spiral wound modules, Desalination, 64 (1987) 339–352.
19. M. Shakaib, S.M.F. Hasani, I. Ahmed, R.M. Yunus, A CFD study on the effect of spacer orientation on temperature polarization in membrane distillation modules, Desalination, 284 (2012) 332–340.
20. F. Li, W. Meindersma, A.B. de Haan, T. Reith, Experimental validation of CFD mass transfer simulations in flat channels with non-woven net spacers, J. Membr. Sci. 232 (2004) 19–30.
21. A. Velázquez, J.I. Mengual, Temperature polarization coefficients in membrane distillation, Ind. Eng. Chem. Res., 34 (1995) 585–590.
22. L. Martínez-Diez, M.I. Vazquez-González, F.J. Florido-Díaz, Study of membrane distillation using channel spacers, J. Membr. Sci., 144 (1998) 45–56.
23. Y. Yun, J. Wang, R. Ma, A.G. Fane, Effects of channel spacers on direct contact membrane distillation, Desal. Water Treat., 34 (2011) 63–69.
24. J. Phattaranawik, R. Jiraratananon, A.G. Fane, C. Halim, Mass flux enhancement using spacer filled channels in direct contact membrane distillation, J. Membr. Sci., 187 (2001) 193–201.
25. J. Phattaranawik, R. Jiraratananon, A.G. Fane, Heat transport and membrane distillation coefficients in direct contact membrane distillation, J. Membr. Sci., 212 (2003) 177–193.
26. J. Phattaranawik, R. Jiraratananon, A.G. Fane, Effects of net-type spacers on heat and mass transfer in direct contact membrane distillation and comparison with ultrafiltration studies, J. Membr. Sci., 217 (2003) 193–206.
27. M.N. Chernyshov, G.W. Meindersma, A.B. de Haan, Comparison of spacers for temperature polarization reduction in air gap membrane distillation, Desalination, 183 (2005) 363–374.
28. L. Martínez-Diez, J.M. Rodríguez-Maroto, Characterization of membrane distillation modules and analysis of mass flux enhancement by channel spacers, J. Membr. Sci., 274 (2006) 123–137.
29. S. Al-Sharif, M. Albeirutty, A. Cipollina, G. Micale, Modelling flow and heat transfer in spacer-filled membrane distillation channels using open source CFD code, Desalination, 311 (2013) 103–112.
30. A. Cipollina, A. Di Miceli, J. Koschikowski, G. Micale, L. Rizzuti, CFD simulation of a membrane distillation module channel, Desal. Water Treat., 6 (2009) 177–183.
31. A. Cipollina, G. Micale, L. Rizzuti, Membrane Distillation heat transfer enhancement by CFD analysis of internal module geometry, Desal. Water Treat., 25 (2011) 195–209.
32. M. Shakaib, S.M.F. Hasani, M. Ehtesham-ul Haque, I. Ahmed, R.M. Yunus, A CFD study of heat transfer through spacer channels of membrane distillation modules, Desal. Water Treat., 51 (2013) 3662–3674.
33. A. Tamburini, P. Pitò, A. Cipollina, G. Micale, M. Ciofalo, A thermochromic liquid crystals image analysis technique to investigate temperature polarization in spacer-filled channels for membrane distillation, J. Membr. Sci., 447 (2013) 260–273.
34. A. Tamburini, G. Micale, M. Ciofalo, A. Cipollina, Experimental analysis via thermochromic liquid crystals of the temperature local distribution in membrane distillation modules, Chem. Eng. Trans., 32 (2013) 2041–2046.
35. N. Abdullah, A.R. Abu Talib, A.A. Jaafar, M.A.M. Salleh, The basics and issues of thermochromic liquid crystal calibrations, Experim. Thermal Fluid Sci., 34 (2010) 1089–1121.
36. A. Tamburini, M. Renda, A. Cipollina, G. Micale, M. Ciofalo, Investigation of heat transfer in spacer-filled channels by experiments and direct numerical simulations, Int. J. Heat Mass Trans., 93 (2016) 1190–1205.
37. Ansys Inc., Ansys-CFX Reference Guide, Release 14.5 (2012).
38. F. Ponzio, A. Tamburini, A. Cipollina, G. Micale, M. Ciofalo, Experimental and computational investigation of heat transfer in channels filled by woven spacers, Int. J. Heat Mass Trans., 104 (2017) 163–177.
39. L. Gurreri, A. Tamburini, A. Cipollina, G. Micale, M. Ciofalo, Flow and mass transfer in spacer-filled channels for reverse electrodialysis: a CFD parametrical study, J. Membr. Sci., 497 (2016) 300–317.