🔍 Key Concepts

• Relative thermal efficiency of intercooled-recuperated (ICR) vs combined cycle gas turbines • Trade-offs between efficiency, weight, and space (footprint) in shipboard propulsion • How adding steam cycle equipment (HRSG, condenser, etc.) affects size and complexity

💭 Think About

• Which configuration generally reaches the highest overall thermal efficiency when you can add a bottoming (steam) cycle to a gas turbine? • On a ship, which components add the most weight and volume: extra heat exchangers on the gas turbine, or a full steam plant (HRSG, condenser, feed systems)? • If one system is more efficient but requires a full additional cycle, what is the likely impact on its size and weight compared to a more compact, single‑cycle arrangement?

✅ Before You Answer

• Identify which option correctly states that higher efficiency usually comes with more equipment, weight, and space in a marine combined cycle plant. • Check whether any choice claims a system is both more efficient and lighter/smaller despite adding an entire steam cycle—scrutinize that carefully. • Confirm that the ICR arrangement modifies a single gas turbine cycle, while the combined cycle adds a separate steam cycle, and infer the impact on shipboard footprint.