Which device is a heat exchanger used to reduce energy consumption?

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Multiple Choice

Which device is a heat exchanger used to reduce energy consumption?

Explanation:
Recovering waste heat with a heat exchanger is a proven way to cut energy use. An economizer is a heat exchanger placed in the exhaust path of a boiler or furnace to transfer heat from the hot exhaust to the incoming feedwater (or air). Preheating this stream means less fuel is needed to bring the water to steaming temperatures, which lowers energy consumption and boosts overall efficiency. The other options don’t perform this energy-recovery role: a hygrometer measures humidity, ORP gauges oxidation-reduction potential, and K1 isn’t a heat-exchanging device. So, the economizer is the device that reduces energy consumption.

Recovering waste heat with a heat exchanger is a proven way to cut energy use. An economizer is a heat exchanger placed in the exhaust path of a boiler or furnace to transfer heat from the hot exhaust to the incoming feedwater (or air). Preheating this stream means less fuel is needed to bring the water to steaming temperatures, which lowers energy consumption and boosts overall efficiency. The other options don’t perform this energy-recovery role: a hygrometer measures humidity, ORP gauges oxidation-reduction potential, and K1 isn’t a heat-exchanging device. So, the economizer is the device that reduces energy consumption.

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