🔍 Key Concepts
• Flash evaporator flow path – where seawater enters, is heated, flashes to vapor, and where brine is discharged
• How evaporation affects salinity – fresh water leaves as vapor, dissolved salts stay behind in the remaining liquid
• Difference between feed water, heated seawater, and brine discharge in a distilling plant
💭 Think About
• Trace the seawater through the system: where does it enter, where is it hottest, and where has the most water already been removed as vapor?
• In which part of the system has the liquid spent the most time in contact with heating surfaces and undergone the most evaporation?
• Which locations are mainly carrying relatively fresh feed or cooling water versus concentrated brine?
✅ Before You Answer
• For each option, decide if that stream is incoming feed, intermediate heated water, cooling medium, or concentrated brine
• Ask: at this point, has significant fresh water vapor already been removed, leaving salts behind?
• Eliminate any options that are primarily cooling or initial feed rather than final concentrated discharge.