Abstract

Potable water scarcity can be considered as a challenge nowadays and at least in the nearest future. Many factors contribute to such situation. Common techniques for desalination purpose include multistage flash, multi-effect distillation and reverse osmosis dedicated essentially to large scales. Humidification Dehumidification Desalination systems appear as low scale installations mainly powered by renewable or geothermal energy. This paper focuses on the state of the art of such installations. It discusses their types, their composition and the available models treating them and their outputs, the plants optimization procedures as well as productivity and costs of these systems. The study aims also the futures of such installations.

Highlights

  • One of the major problems encountered our days is potable water scarcity: only 0.014% of available water is usable for human beings [1]

  • Multiple techniques were developed among centuries to provide fresh water from brackish or sea water

  • Common ways are multistage flash, multieffect distillation and reverse osmosis, such ones being of great order scales

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Summary

Introduction

One of the major problems encountered our days is potable water scarcity: only 0.014% of available water is usable for human beings [1]. Common ways are multistage flash, multieffect distillation and reverse osmosis, such ones being of great order scales Among these techniques, the desalination based on humidification dehumidification appears as a low order scale, low energy consumption and easy way of providing fresh water adequate for arid and remote regions and mainly powered by renewable energy. This paper is dedicated to expose the state of the art of such installations It gives insight on their composition by enumerating the different possible components and the several types of installations encountered. It focuses on the main objectives and outcomes of the available published papers and discusses the different parametric results It defines the optimization procedures of the plant design, consumption and productivity. It gives ideas on the possible ways of improvement of such installations

Humidification dehumidification desalination technique
HDH systems’ principle
HDH systems’ components
Humidifier
Condenser
Exchanger
Captures
Blower
HDH Studies main outcomes
Optimazation procedures
Economic evaluations of HDH systems
Findings
Futures

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