What is the function of an economizer in a boiler system?

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Study for the Washington DC 1st Class Boiler Test. Prepare with comprehensive questions, each with explanations and insights. Equip yourself thoroughly for success!

Multiple Choice

What is the function of an economizer in a boiler system?

Explanation:
An economizer is a heat exchanger that recovers heat from the boiler’s exhaust to preheat the incoming feedwater. By warming the water before it enters the boiler, less energy is needed to bring it to the proper temperature and turn it into steam, which lowers fuel consumption and boosts overall boiler efficiency. The exhaust gases are cooled slightly as their heat is transferred, not heated further. It does not filter the feedwater, nor does it release steam to the atmosphere. So its function is to preheat feedwater to save fuel.

An economizer is a heat exchanger that recovers heat from the boiler’s exhaust to preheat the incoming feedwater. By warming the water before it enters the boiler, less energy is needed to bring it to the proper temperature and turn it into steam, which lowers fuel consumption and boosts overall boiler efficiency. The exhaust gases are cooled slightly as their heat is transferred, not heated further. It does not filter the feedwater, nor does it release steam to the atmosphere. So its function is to preheat feedwater to save fuel.

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