What is a boiler economizer and what benefit does it provide?

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Multiple Choice

What is a boiler economizer and what benefit does it provide?

The concept being tested is energy recovery in a steam system. An economizer is a heat exchanger placed in the path of the boiler’s exhaust gases. It captures heat from the hot flue gases before they exit the stack and uses that energy to preheat the feedwater entering the boiler. By raising the feedwater temperature, the boiler requires less fuel to convert it into steam, which lowers fuel consumption and reduces stack losses. In short, the economizer increases overall boiler efficiency by reclaiming waste heat from the flue gas. The other descriptions don’t fit because they either misstate what the device does or describe a different function. It doesn’t preheat exhaust gas, nor does it remove ash from flue gases, nor does it cool feedwater. Its primary role is transferring residual heat from flue gases to feedwater, boosting efficiency.

The concept being tested is energy recovery in a steam system. An economizer is a heat exchanger placed in the path of the boiler’s exhaust gases. It captures heat from the hot flue gases before they exit the stack and uses that energy to preheat the feedwater entering the boiler. By raising the feedwater temperature, the boiler requires less fuel to convert it into steam, which lowers fuel consumption and reduces stack losses. In short, the economizer increases overall boiler efficiency by reclaiming waste heat from the flue gas.

The other descriptions don’t fit because they either misstate what the device does or describe a different function. It doesn’t preheat exhaust gas, nor does it remove ash from flue gases, nor does it cool feedwater. Its primary role is transferring residual heat from flue gases to feedwater, boosting efficiency.

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