A computational tool for guiding retrofit projects of industrial heat recovery systems subject to variation in operating conditions
Journal article, 2021

Heat exchanger networks (HEN) in industrial heat recovery systems often consist of large and complex subsystems. Usually, such HENs are subject to variation in operating conditions, such as varying inlet conditions or changing heat capacity flow rates. Additionally, complexities such as stream splits and recycle loops are commonly present in industrial HENs. Therefore, extensive modelling and/or analytical calculations may be necessary when analyzing different retrofit proposals. Furthermore, retrofit opportunities in industrial heat recovery systems are often constrained by operability considerations, i.e. retrofit actions are supposed to have as little impact as possible on the production process to maintain the quality of the core product. In this work, a computational analysis tool is proposed for effective screening of HEN retrofit design proposals at an early stage in the design process. The proposed tool enables fast evaluation of the network's response, i.e. temperatures and heat loads, when operating conditions change and/or operational settings are manipulated, and it is applicable for a wide range of HEN structures. The practical use of the analysis tool is demonstrated in a case study on the HENs of a large modern Kraft pulp mill.

Pulp and paper industry

Heat integration





Christian Langner

Chalmers, Space, Earth and Environment, Energy Technology

Elin Svensson

CIT Industriell Energi AB

Simon Harvey

Chalmers, Space, Earth and Environment, Energy Technology

Applied Thermal Engineering

1359-4311 (ISSN)

Vol. 182 115648

Subject Categories

Production Engineering, Human Work Science and Ergonomics

Energy Engineering

Other Engineering and Technologies not elsewhere specified



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