Heat recovery enhancement in HENs using a combinatorial approach of paths combination and process streams' temperature flexibility

Osman, Abdelbagi; Mutalib, M.I. Abdul; Shigidi, Ihab

doi:10.1016/j.sajce.2016.05.002

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…The same method of path combination is used to investigate heat recovery enhancement in HEN of variable streams' temperature. Recently, they applied the same approach to investigate the environmental energy-saving in HEN along with the impact of CO 2 emission [10][11][12].…”

Section: Historical Reviewmentioning

confidence: 99%

Energy Savings in the Heat Exchanger Network of an Oil Refinery Pre-Heat Train Unit Using a Path’s Combination at Different HRAT Values

Osman

Mirghani

2022

Processes

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Conservation of energy usage is essential in chemical process plants due to the expanded energy users and demands alongside the carry-on hike of energy prices. This study analyzed the performance of energy savings in a heat exchanger network (HEN). It is based on decreasing utility usage while increasing process-to-process heat exchange in HEN using a path combination approach at different heat recovery approach temperatures (HRATs). The approach generates different combined path options for heat shifting from utilities to exchangers in a HEN. In terms of cost targeting, the optimal HRAT in a HEN is determined for each path’s combination option. The study focused on the HEN of crude oil preheat trains. Shifting heat load between utilities implies adding and subtracting loads to and from exchangers in a HEN. Therefore, a minor retrofit to compensate for the heat transfer area is required for some HEN exchangers. The optimum HRAT corresponding to the lowest total cost was determined for each option and ranged between 8 °C and 14 °C. Moreover, two out of five options in HEN with low capital investment and a short payback period were found to be promising.

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Section: Historical Reviewmentioning

confidence: 99%

Energy Savings in the Heat Exchanger Network of an Oil Refinery Pre-Heat Train Unit Using a Path’s Combination at Different HRAT Values

Osman

Mirghani

2022

Processes

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“…Their strategy depends on shifting heat loads through utility paths at the constraint of heat recovery approach temperature (HRAT) and exchanger pressure drop. In subsequent work, Osman et al applied the same methodology to screen more extensive options of heat recovery enhancement in HEN with an option of varying HEN streams temperature [13].…”

Section: Introductionmentioning

confidence: 99%

Utility Paths Combination in HEN for Energy Saving and CO2 Emission Reduction

2019

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Energy demand and flue gas emissions, namely carbon dioxide (CO2) associated with the industrial revolution have exhibited a continuous rise. Several approaches were introduced recently to mitigate energy consumption and CO2 emissions by either grass root design or retrofit of existing heat exchanger networks (HEN) in chemical process plants. In this work, a combinatorial approach of path combination is used to generate several options for heat recovery enhancement in HEN. The options are applied to successively shift heat load from HEN utilities using combined utility paths at different heat recovery approach temperature (HRAT) considering exchangers pressure drop. Industrial case study for HEN of the preheat train in crude oil distillation unit from the literature is used to demonstrate the approach. The obtained results have been studied economically using the cost targeting of Pinch Technology. As a result, both external energy usage and CO2 emissions have been reduced from a heater device in HEN by 20% and 17%, respectively, with a payback of less than one year.

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Heat recovery enhancement in HENs using a combinatorial approach of paths combination and process streams' temperature flexibility

Cited by 2 publications

References 18 publications

Energy Savings in the Heat Exchanger Network of an Oil Refinery Pre-Heat Train Unit Using a Path’s Combination at Different HRAT Values

Energy Savings in the Heat Exchanger Network of an Oil Refinery Pre-Heat Train Unit Using a Path’s Combination at Different HRAT Values

Utility Paths Combination in HEN for Energy Saving and CO2 Emission Reduction

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