How does a cooling water economizer improve engine efficiency?

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Multiple Choice

How does a cooling water economizer improve engine efficiency?

The main idea is to capture waste heat from the engine’s exhaust and use it to warm the boiler feedwater before it goes into the boiler. By preheating the feedwater, less fuel is needed to raise water to its boiling point and produce steam, so the plant runs more efficiently overall. This reuse of exhaust heat directly boosts thermal efficiency and can lower fuel costs. This isn’t about cooling exhaust for emission reduction, which would be a different approach. It also isn’t about filtering or treating the feedwater, or about pumping seawater through the cooling system. Those functions are handled by separate systems.

The main idea is to capture waste heat from the engine’s exhaust and use it to warm the boiler feedwater before it goes into the boiler. By preheating the feedwater, less fuel is needed to raise water to its boiling point and produce steam, so the plant runs more efficiently overall. This reuse of exhaust heat directly boosts thermal efficiency and can lower fuel costs.

This isn’t about cooling exhaust for emission reduction, which would be a different approach. It also isn’t about filtering or treating the feedwater, or about pumping seawater through the cooling system. Those functions are handled by separate systems.

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