Abstract
One of the innovative methods for decentralized low-scale purification of water is the humidification dehumidification (HDH) desalination technology. Many research activities have been carried out recently with the aim of improving this technology. The economic and environmental benefits of the HDH technology are enormous including feasibility of being powered by sustainable energy sources such as solar and geothermal, ability to operate at low temperature, low maintenance requirements, and simple construction needs. The principal HDH components, latest research on HDH systems driven by renewable energy, and recent innovations on HDH design for sustainable water production are discussed in this paper. It is worth noting that the development of the key features and sustainability aspects of HDH desalination technology are still under research and more improvements are needed to optimize process performance parameters in terms of quantity of water produced, specific renewable energy required, and specific cost of water produced. However, HDH technology has been proven to be an inexpensive and reliable desalination system in terms of environmental friendliness for small scale applications.
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