A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns

Areej Javed; Afaq Hassan; Muhammad Babar; Umair Azhar; Asim Riaz; Rana Mujahid; Tausif Ahmad; Muhammad Mubashir; Hooi Ren Lim; Pau Loke Show; Kuan Shiong Khoo

doi:10.3390/en15186498

A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns

Areej Javed, Afaq Hassan, Muhammad Babar, Umair Azhar, Asim Riaz, Rana Mujahid, Tausif Ahmad, Muhammad Mubashir, Hooi Ren Lim, Pau Loke Show, Kuan Shiong Khoo

Physical Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus® process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.

Original language	English (US)
Journal	Energies
Volume	15
Issue number	18
DOIs	https://doi.org/10.3390/en15186498
State	Published - Sep 1 2022

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General Computer Science

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10.3390/en15186498

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title = "A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns",

abstract = "Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus{\textregistered} process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.",

author = "Areej Javed and Afaq Hassan and Muhammad Babar and Umair Azhar and Asim Riaz and Rana Mujahid and Tausif Ahmad and Muhammad Mubashir and Lim, {Hooi Ren} and Show, {Pau Loke} and Khoo, {Kuan Shiong}",

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AU - Javed, Areej

AU - Hassan, Afaq

AU - Babar, Muhammad

AU - Azhar, Umair

AU - Riaz, Asim

AU - Mujahid, Rana

AU - Ahmad, Tausif

AU - Mubashir, Muhammad

AU - Lim, Hooi Ren

AU - Show, Pau Loke

AU - Khoo, Kuan Shiong

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N2 - Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus® process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.

AB - Distillation has relatively low thermodynamic efficiency, so it is a prime target for process intensification studies. The current research aims to study exergy losses in various heat-integrated distillation columns. A conventional industrial-scale i-butane/n-butane fractionator has been selected as a case study for the comparison of the performances of various heat-integrated designs. The Aspen Plus® process simulator is used to perform steady-state simulations and exergy analyses of the conventional distillation column (CDC), internally heat-integrated distillation column (iHIDiC), externally heat-integrated double distillation columns (EHIDDiC), and vapor recompression (VRC) systems. The results of these exergy analyses show that a modified VRC system (ηE = 10.69%) is the most efficient design for this separation. The exergy efficiency of the conventional VRC system is the same as that of the CDC (ηE = 9.27%). The EHIDDiC system (ηE = 9.77%) is somewhat better than the CDC, whereas iHIDiC shows poor exergy efficiency (ηE = 8.09%), even lower than the CDC.

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A Comparison of the Exergy Efficiencies of Various Heat-Integrated Distillation Columns

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