🔍 Key Concepts

• Relationship between exhaust gas temperature and steam generation in a waste heat boiler • How heat transfer (not just pressure) governs boiler performance • What parameter of the exhaust actually limits the maximum steam pressure the boiler can safely and effectively produce

💭 Think About

• Ask yourself: Which exhaust property directly affects how much heat energy is available to turn water into steam in the waste heat boiler? • Consider: If the main engine load changes, which of these exhaust properties changes in a way that clearly affects boiler output? • Think: Which factor is consistently used when calculating boiler heat absorption and steam production—composition, temperature, pressure, or timing?

✅ Before You Answer

• Verify which variable appears in basic heat transfer and boiler energy balance equations (e.g., Q = m·c·ΔT). • Check which property is routinely monitored and controlled for boiler protection and efficiency in the engine room logs. • Confirm which factor actually limits the boiler’s ability to raise steam pressure, rather than just influencing combustion or engine efficiency.