Where is the boiler economizer typically located and what is its function?

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Multiple Choice

Where is the boiler economizer typically located and what is its function?

The main idea is heat recovery from exhaust to save fuel. An economizer is a heat exchanger placed in the flue gas path, in the exhaust line after the boiler (and often after the superheater in many designs). Its job is to transfer heat from the hot flue gases to the cold feedwater, preheating the feedwater before it enters the boiler. This preheating means the water requires less energy to become steam, so overall boiler efficiency improves and stack losses decrease. It’s not intended for heating fuel, storing water in the steam drum, or cooling incoming air, which is why the other contexts don’t fit.

The main idea is heat recovery from exhaust to save fuel. An economizer is a heat exchanger placed in the flue gas path, in the exhaust line after the boiler (and often after the superheater in many designs). Its job is to transfer heat from the hot flue gases to the cold feedwater, preheating the feedwater before it enters the boiler.

This preheating means the water requires less energy to become steam, so overall boiler efficiency improves and stack losses decrease. It’s not intended for heating fuel, storing water in the steam drum, or cooling incoming air, which is why the other contexts don’t fit.

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