Honors College Thesis
 

Freeze Stage Analysis of an Indirect Freeze Desalination System

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  • Freeze desalination poses as a potential solution to many of the issues that accompany current desalination methods. The research detailed in this manuscript involves creating and analyzing a numerical model of the freezing operation of an indirect contact freeze-melting (FM) desalination system. In this initial analysis, pure water is frozen to avoid the need to model mass transfer within the saltwater. The system consists of a single vertical tube submerged in a chamber of water. Coolant enters the tube at a set inlet temperature below the freezing point of water, causing ice to form on the outer surface of the tube. In order to analyze how the system reacts to changes; cycle time, mass ow rate, overall tube length, and tube radius were varied parametrically. Because the thermal resistance of the ice layer increases with time|slowing the ice production rate|the optimal cycle time was determined to be 1,500 seconds when changeover between freezing and melting cycles was accounted for.
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