What is used economizer in centrifugal chiller

Since sufficient feedwater is not supplied into the economizer though the heat is absorbed from flue gas at the boiler start-up and low load operation, steaming may occur in the economizer. Therefore the economizer recirculation line is provided between the furnace downcomer and the economizer inlet feedwater piping. This line provides the recirculation flow between the drum, the downcomer and the economizer so as to prevent steaming in the economizer. Economizer recirculation valve is only opened at initial stage of the boiler start-up.

Fins are a relatively easy and inexpensive way to increase the heating surface of an economizer. By utilizing fins it is possible to reduce the economizer footprint while achieving the desired performance.

Economizer is a device in which the waste heat of the fuel gases is utilized for heating the feed water.

Economizer, Penny-Pincher