🔍 Key Concepts

• Flash evaporator operation and how feedwater temperature affects evaporation rate • Effect of extremely cold seawater entering heat exchangers and brine heater systems • Relationship between seawater flow rate, heat transfer, and maintaining design operating temperatures

💭 Think About

• Think about what happens to the temperature of the feedwater if you send a large quantity of very cold seawater through the system—does it get warmer or colder overall? • Which of the choices deals with keeping the evaporator operating at its designed temperature range so that flashing can actually occur? • Ask yourself: does throttling (reducing flow) usually increase or decrease the distilling rate, and why?

✅ Before You Answer

• Identify which option is focused on maintaining proper feed temperature for flashing, not just protecting metal or changing capacity • Consider whether too much very cold seawater would lower or raise the temperature inside the evaporator system • Eliminate any option that suggests a result that throttling flow would normally not produce (for example, increasing output by reducing necessary input)