1. Customised retrofit of heat exchanger network combining area distribution and targeted investment.
- Author
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Lai, Yee Qing, Wan Alwi, Sharifah Rafidah, and Manan, Zainuddin Abdul
- Subjects
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HEAT exchangers , *WATER temperature , *SUNFLOWER seed oil , *PAYBACK periods , *PLANT performance , *HEAT transfer fluids , *SUNFLOWERS - Abstract
Heat exchanger network (HEN) retrofit plays a major role in solving environmental issues and improving plants' performance. Development of HEN retrofit graphical tools has recently focused on detailed representation of existing HEN to facilitate retrofit problem-solving. This work presents a new customised approach for HEN retrofit that uses a combination of individual stream temperature versus enthalpy plot (STEP) to map hot and cold streams, a heat exchanger area versus enthalpy (A vs H) plot to minimise the required overall heat exchanger area and graphical cost screening tool and strategies to steer and customise a retrofit design toward a desired investment payback period. Application of the new retrofit methodology on a sunflower oil production plant shows comparable energy savings and 20% shorter payback period as compared other established retrofit methodologies. Image 1 • STEP and A vs H plot are employed to perform capital-energy trade-off for HEN retrofit. • STEP indicates the multiple utilities required. • A vs H plot visualises heat exchanger area and number of additional units. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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