Study on Active and Passive Integration Humidification–Dehumidification Solar Desalination


A humidification–dehumidification (HDH) solar desalination process with active and passive air circulation is proposed, in which the phase change material (PCM) is used to recover the latent heat of vapor condensation to increase the fresh water production. The experiments show that the cost of fresh water is 23.47 Yuan/t, the gain output ratio of the unit is 13.37, and the water production is increased by 84.4% compared with the dehumidifier without using PCM. The heat transfer between the heat pipe and the PCM (I) (paraffin) and the high thermal conductivity PCM (II) are tested and simulated.

Keywords: humidification–dehumidification, solar desalination, PCM, numerical simulation

[1] Ansari, O., Asbik, M., Bah, A., et al. (2013). Desalination of the brackish water using a passive solar still with a heat energy storage system. Desalination, vol. 324, pp. 10–20.

[2] Arunkumar, T., Denkenberger, D., Ahsan, A., et al. (2013). The augmentation of distillate yield by using concentrator coupled solar still with phase change material. Desalination, vol. 314, pp. 189–192.

[3] Kabeel, A. E. and Abdelgaied, M. (2016). The performance of a modified solar still using hot air injection and PCM. Desalination, vol. 379, pp. 102–107.

[4] Asbik, M., Ansari, O., and Bah, A. (2016). Exergy analysis of solar desalination still combined with heat storage system using phase change material (PCM). Desalination, vol. 381, pp. 26–37.

[5] Chen, C., Zhang, H., Gao, X., et al. (2016). Numerical and experimental investigation on latent thermal energy storage system with spiral coil tube and paraffin/expanded graphite composite PCM. Energy Conversion and Management, vol. 126, pp. 889–897.

[6] Korti, A. I. N. and Tlemsani, F. Z. (2016). Experimental investigation of latent heat storage in a coil in PCM storage unit. Journal of Energy Storage, vol. 5, pp. 177–186.

[7] Lohrasbi, S., Miry, S. Z., Gorji-Bandpy, M., et al. (2017). Performance enhancement of finned heat pipe assisted latent heat thermal energy storage system in the presence of nano-enhanced H2O as PCM. International Journal of Hydrogen Energy, pp. 1–21.

[8] Motahar, S. and Khodabandeh, R. (2016). Experimental study on the melting and solidification of a PCM enhanced by heat pipe. International Communications in Heat & Mass Transfer, vol. 73, pp. 1–6.

[9] Kim, T. Y., Hyun, B. S., and Lee, J. J. (2013). Numerical study of the spacecraft thermal control hardware combining solid-liquid PCM and a heat pipe. Aerospace Science & Technology, vol. 27, pp. 10–16.