Abstract
The paper presents a method developed for the energy retrofit of specific Heat Exchanger Networks not containing Utility Paths. This useful and highly practically oriented method involves a systematic approach to obtaining the most efficient minimal modification topology of a Heat Exchanger Network, which brings the greatest benefits in terms of energy savings of the modified process. In principle, it is focused on finding the most suitable location for a new heat exchanger insertion to create the most efficient Utility Path. The next step of the developed retrofit method is the detailed design of the newly integrated heat exchanger using commercial software in combination with several heuristic rules regarding the cost-free investment and maintenance cost minimization of a new heat exchanger and considering heat transfer enhancement within the available exchanger type, space, and fluids pressure drop constraints. The detail design stage of the method also includes observation and reassessment of the performance and operational parameters of the existing heat exchangers. Then, the developed method is applied to the case of the Heat Exchanger Network retrofit in the process of the hydrogenation of oil.
Highlights
The continuing need to improve energy efficiency in the chemical, petrochemicals, power, and other process industries leads to continually increasing interest in retrofitting Heat Exchanger Networks (HENs)
In this part of the presented paper, the developed method is applied to the intensification of the mixture is heated up in the exchanger E2 and in the process furnace to the temperature 289 described in the previous chapter following the calculation procedure of the developed
In this part of the presented the developed is applied to the intensification of the heat duties) including generation of the Diagram (GD), and (iii) value determination process described in the previous chapter following the calculation procedure of the developed method acceptable forand existing heat exchangers retrofit as well as for the newly designed heat exchangers
Summary
The continuing need to improve energy efficiency in the chemical, petrochemicals, power, and other process industries leads to continually increasing interest in retrofitting Heat Exchanger Networks (HENs). Such a retrofit is currently based on applying some of the Heat Integration strategies developed for the utilization of waste process heat and/or for recovery of more of the heat available in the process streams. Up-to-date strategies for HEN retrofit presented in several reports in the literature are based especially on Pinch Analysis, mathematical programming, or a combination of both these approaches (hybrid methods).
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