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Preaheater- shell and tube heat exchanger. Image courtesy N-thalpie GmbH.
Improving heat exchanger performance in existing process plants
Improving energy efficiency is a key objective for many industrial facilities are trying to reduce operational costs and environmental impact. One of the most effective ways to achieve this is by optimizing the performance of heat exchanger networks that already exist within a plant. Thermodynamic analysis combined with modern simulation tools provides engineers with powerful methods to identify and implement such improvements.
By Christian Dal Cin, Process Engineer, N-thalpie GmbH
Industrial process plants depend on reliable heat transfer in order to maintain stable operation and control energy consumption. Heat exchangers therefore play an important role in the thermodynamic performance of systems used in chemical processing, power generation and other process industries. Their basic function is to transfer thermal energy between fluids without mixing them, enabling controlled heating or cooling within the process. In many plants, heat exchangers have been installed gradually over the lifetime of the facility. Additional units are often integrated when production capacity increases or when new process steps are introduced. While this approach solves immediate operational requirements, it can lead to networks that are not thermodynamically optimized. In such cases, part of the available heat recovery potential remains unused and utilities such as steam or cooling water may be consumed unnecessarily. For this reason, improving plant efficiency is often less about replacing individual pieces of equipment and more about understanding how the complete heat exchanger network operates. By analysing the thermodynamic behaviour of process flows, opportunities can be identified to redistribute heat duties and improve internal heat recovery. www. heat-exchanger-world. com Heat Exchanger World May 2026
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