🔍 Key Concepts

• Differential temperature across a condenser (circulating water outlet temp minus inlet temp) • How circulating water flow rate affects heat transfer in a shell‑and‑tube condenser • Where make‑up feedwater enters the system (condensate/feed system vs. circulating water system)

💭 Think About

• For statement I: If you change the speed of the circulating pump, what happens to the water flow rate and the time that water spends in the condenser? How would that change the temperature rise across the condenser? • For statement II: Does adding make‑up feedwater directly mix with the circulating seawater/freshwater, or does it join the condensate/feed side? Would that have any direct effect on the circulating water inlet or outlet temperatures? • Think about which side of the condenser each change acts on: the steam/condensate side or the circulating water side. Which side controls the measured differential temperature of the circulating water?

✅ Before You Answer

• Be clear on the definition: differential temperature = outlet circulating water temperature − inlet circulating water temperature. • Verify whether changing pump speed changes heat transfer per unit mass of water or changes flow so much that the temperature rise per pass is affected. • Confirm whether make‑up feed is part of the closed condensate/feedwater loop or the open circulating water loop; only changes on the circulating water side directly affect its differential temperature.