🔍 Key Concepts

• Review how ejectors work: they always need a high‑pressure motive fluid to entrain and remove air/brine from the evaporator. • Look closely at the diagram piping around the ejector assembly (usually at the bottom of the unit) and trace where that driving fluid comes from and where it goes. • Think about the normal uses of jacket water, brine discharge, and feedwater in an evaporator system and which of these is typically at a suitable pressure and flow to drive an ejector.

💭 Think About

• On the illustration, follow the line that feeds the ejector nozzles: which pump is it connected to, and what does that pump normally handle? • Ask yourself: which of the listed fluids would be both continuous and expendable (okay to send overboard) when used as a driving jet through an ejector? • Consider which of the choices would NOT make sense: would you want to use treated feedwater or relatively low‑pressure jacket water as a sacrificial high‑velocity jet?

✅ Before You Answer

• Verify on the drawing which pump discharges directly to the ejector nozzles before going to the overboard/brine line. • Confirm that the fluid used as motive power is something you can waste overboard without concern for treatment quality. • Double‑check that the fluid chosen would normally be at a higher pressure than the evaporator shell, suitable to create suction in the ejector.