Low-temperature thermal desalination

I am interested in knowing that what Low-temperature thermal desalination means and which country is using this technique successfully?

1 Answer

1. Hi Maria: Low-temperature thermal desalination is a class of water desalination technologies where water is evaporated at temperatures lower than 100 degrees Celsius - the temperature at which water boils under athmospheric pressure. All low-temperature thermal desalination teechnologies are based on the fact that water can be boiled at temperature lower than 100 0C if vacuum is created in the chambers where evaporation occurs. For example, water can be boiled at 65 0C (instead of 100 0C) if it is evaporated in a chamber where the pressure is only 25 % of the athmospheric pressure. An example of the most common low-termerature thermal evaporation system widely used for seawater desalination system is multieffect distillation (MED). MED requires less steam to produce the same volume of water. A similar technology that have found wide application is referenced as vacuum compression (VC) More details on MED and VC can be found in the books included in the desalination library. Nikolay Voutchkov, Water Globe Consulting