April 2021

Engineering and Construction

Retrofit: A viable alternative to greenfield construction

Retrofitting/revamping—also referred to as modernization, derating or rerating—is an update of a plant or an existing piece of equipment to improve efficiency and/or capacity, and to make it adequate for a new design or operating condition through the modification or replacement of some of its parts.

Das, S. C. D., Fluor Daniel India Pvt. Ltd.

Retrofitting/revamping—also referred to as modernization, derating or rerating—is an update of a plant or an existing piece of equipment to improve efficiency and/or capacity, and to make it adequate for a new design or operating condition through the modification or replacement of some of its parts. New parts/equipment may be added to make the equipment and/or the plant adhere to demand. High-efficiency internals replace old ones, and some equipment parts are removed and replaced with new ones. For example, FIG. 1 shows a sketch for a typical fluid catalytic cracking (FCC) reactor-regenerator revamp. In this case, the existing regenerator is being retrofitted to cater to increased demand by

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