🔍 Key Concepts

• Flow path of cooling water through a two-pass shell-and-tube heat exchanger • How the partition (divider plate) in the head separates inlet and outlet flows • Relationship between the locations of the water inlet/outlet nozzles and the tube bundle they serve

💭 Think About

• When water enters the head from the inlet nozzle, which group of tubes (upper or lower) does it have to reach first to match the arrows in the main illustration? • If the water must return through the opposite group of tubes, how must the divider plate be oriented so the flows cannot mix yet still reach their proper tube bank? • Looking from the tube side, where would you see the two round nozzle openings relative to the divider that creates a two-pass path?

✅ Before You Answer

• Confirm which side of the head you’re viewing: tube side vs. pipe (nozzle) side • Trace the blue arrows and decide which is inlet and which is outlet and which tubes (top/bottom) they connect to • Check that the chosen figure shows the nozzles on the same relative positions (upper/lower and fore/aft) as in the main cutaway, with the divider correctly blocking direct short-circuiting between them