🔍 Key Concepts

• Diesel jacket water system normal temperature and purpose • Basic steps in a flash-type or low-pressure distiller using engine waste heat • Difference between heating and cooling duties in a distilling plant (feedwater heater, condenser/distillate cooler, brine cooler)

💭 Think About

• Think about what part of the distillation process needs a hot medium and what parts need a cold medium. • Ask yourself: is jacket water normally the hotter stream or the colder stream compared to seawater and incoming feedwater? • Match the typical temperature of diesel engine jacket water to the most logical place it would be used in a distiller.

✅ Before You Answer

• Identify which components in a distilling plant normally require cooling versus heating. • Recall that jacket water is usually around 160–190°F (70–90°C) and is considered a waste heat source. • Before choosing, make sure the option you pick makes sense with jacket water being relatively hot, not cold.