Two desalination projects include an investigation of the conditions under which ice crystal growth would occur in the bulk or on seed ice crystals with heat removal through a cold wall and an investigation of the feasibility of using a vacuum spray chamber to strip refrigerant from refrigerant water emulsions. Indirect freezing experiments were carried out in a double pipe heat exchanger with seed ice concentrations of 5 to 18 % and temperature driving forces of 3 to 10 Cel using both a brass and styrene coated brass tube. Under all the conditions investigated, ice crystal growth occurred on the tube walls. Significant removal of emulsified refrigerant occurred by two mechanisms; flashing of the refrigerant drops into the spray chamber during the expansion and break up of the liquid sheet and disolution of the emulsified droplets into the aqueous phase. A model based on these mechanisms was developed which satisfactorily explained the experimental results.
Indirect freezing and vacuum stripping of emulsions for freeze desalination of saline water
Indirektes Gefrieren und Vakuumstreifen von Emulsionen fuer die Gefrierentsalzung von Salzwasser
US Government Reports ; May ; 1-127
1984
127 Seiten
Report
Englisch
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