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Improved Solar Still Process for Desalting Sea and Brackish Waters
This article discusses several new design features that have been investigated to improve the yield of existing solar stills. One of the improvements is the mechanical separation of the collector‐evaporator unit from the condenser. A further improvement is the use of air as an intermediate substance that substitutes forced convection for natural convection to increase evaporation. In addition, this design utilizes droplet evaporation in lieu of flat‐sheet evaporation to increase the interfacial area between carrier and water droplet. Another important feature of the new design is the reuse of energy in an external heat exchanger to preheat the incoming seawater while the condensate is extracted from the saturated vapor. The cooled and dewatered air can be recycled to the still. The paper discusses an experimental plant that was located on the roof of the Chemistry Annex Building on the Georgia Institute of Technology campus, Atlanta, Georgia. Collection of preliminary data was begun in March 1959. The equipment was tested and improved until May 19, when reliable data collection was started and carried through until the end of September 1959. Four experimental stills of different designs, each 9 sq ft in cross‐sectional area, with plastic film canopies, were evaluated. The paper discusses the main characteristics of the four experimental designs, along with the experimental procedure including deep basin (natural convection), and shallow basin (glass and forced convection).
Improved Solar Still Process for Desalting Sea and Brackish Waters
This article discusses several new design features that have been investigated to improve the yield of existing solar stills. One of the improvements is the mechanical separation of the collector‐evaporator unit from the condenser. A further improvement is the use of air as an intermediate substance that substitutes forced convection for natural convection to increase evaporation. In addition, this design utilizes droplet evaporation in lieu of flat‐sheet evaporation to increase the interfacial area between carrier and water droplet. Another important feature of the new design is the reuse of energy in an external heat exchanger to preheat the incoming seawater while the condensate is extracted from the saturated vapor. The cooled and dewatered air can be recycled to the still. The paper discusses an experimental plant that was located on the roof of the Chemistry Annex Building on the Georgia Institute of Technology campus, Atlanta, Georgia. Collection of preliminary data was begun in March 1959. The equipment was tested and improved until May 19, when reliable data collection was started and carried through until the end of September 1959. Four experimental stills of different designs, each 9 sq ft in cross‐sectional area, with plastic film canopies, were evaluated. The paper discusses the main characteristics of the four experimental designs, along with the experimental procedure including deep basin (natural convection), and shallow basin (glass and forced convection).
Improved Solar Still Process for Desalting Sea and Brackish Waters
Grune, Werner N. (author) / Zandi, Iraj (author)
Journal ‐ American Water Works Association ; 52 ; 993-1005
1960-08-01
13 pages
Article (Journal)
Electronic Resource
English
Design , Evaporation , Equipment , Data Collection , Atlanta , Energy , Brackish Water , Seawater , Desalination Plants , Georgia
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