General Methodology for Exergy Balance in a Process Simulator

Ghannadzadeh, Ali; Hétreux, Gilles; Baudouin, Olivier; Baudet, Philippe; Floquet, Pascal; Joulia, Xavier

doi:10.1016/b978-0-444-54298-4.50130-6

Cited by 5 publications

(8 citation statements)

References 5 publications

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“…To overcome these limitations, a general exergy balance methodology [25] was developed and integrated in a commercial process simulator. In this methodology, a panel of solutions enumerating the major sources of irreversibility and clues for process improvement for each class of unit operations was constructed based on the identified exergy losses sources [61] and previously published studies [48,49,[62][63][64][65].…”

Section: Methodologiesmentioning

confidence: 99%

“…In this methodology, a panel of solutions enumerating the major sources of irreversibility and clues for process improvement for each class of unit operations was constructed based on the identified exergy losses sources [61] and previously published studies [48,49,[62][63][64][65]. However, this panel is not exhaustive and needs to be grad-ually enriched during the analysis of different case studies such as Natural Gas Liquids (NGL) recovery process [25,26] and ammonia production process where the results are provided in the form of visualized exergetic process flowsheets [66].…”

Section: Methodologiesmentioning

confidence: 99%

“…The current article tries to incorporate a similar systematic approach to find ways of producing more sustainable chlorine. We use the proposed solution panel [25] which enables us to use the results of an exergy analysis in order to come up with thermodynamic solutions for improvements across the process. In this way, not only the low-exergy-efficient unit operations are identified, but also technical tools to improve inefficient units based on their key sources of irreversibility are proposed.…”

Section: Methodologiesmentioning

confidence: 99%

“…However, unlike these analyses, this study does not only find the worst unit operation through a comprehensive exergy analysis, but also proposes improvement methods based on the key V C 2016 American Institute of Chemical Engineers sources of irreversibilities. Although some of these improvements can also be identified by competent chlorine process developers, the exergy analysis using the panel of solution [25] makes sure all the possible significant improvements are taken into account through a systematic approach.…”

Section: Introductionmentioning

confidence: 99%

“…The diagnosis of the entire process and individual blocks is included and the results are presented in the form of visualized exergetic process flowsheets. These flowsheets help to use the proposed solution panel [25] to suggest systematic ways to reduce the main sources of losses in different blocks; thus, achieving a higher overall efficiency and enhancing the sustainability aspects of production process.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of an alternative chlorine production process for energy saving toward sustainability

Ghannadzadeh

Sadeqzadeh

2016

Env Prog and Sustain Energy

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Exergetic‐based solutions are proposed in this work to reduce the energy footprint of an alternative chlorine production process. By presenting exergy analysis results in the form of visualized exergetic process flowsheets using a solution panel, this study does not only find the low‐exergy‐efficient unit operations, but also proposes ways to improve the exergy efficiency based on the major sources of irreversibility of individual unit operations. Based on the amount of exergy losses, the alternative chlorine production process is divided into three main functional blocks. The total internal and external exergy losses for the entire process are calculated as 14,523.5 and 286.1 kJ/kg, respectively. The electrolysis block shows the highest potential for improvements with the largest exergy loss (responsible for more than 96.0% of total losses; with 14,093.2 kJ/kg of internal losses and 146.5 kJ/kg of external losses). Isothermal mixing, lower reaction temperature, and reduced pressure drop are suggested as avenues for improvement. Exergy losses in the gas treatment block with total exergy losses of 411.7 kJ/kg (equivalent to 2.8% of total losses) are mainly due to the cooling column (241.9 kJ/kg), where modifications in column might be helpful as concentration and temperature gradients along the tower are sources of exergy loss. The highest exergy loss in the feed pretreatment block with the total exergy losses of 158.2 kJ/kg (i.e., 1.1% of total losses) belongs to the mixers (106 kJ/kg) where isothermal and also isobaric mixing is required. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1512–1520, 2016

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Section: Methodologiesmentioning

confidence: 99%

Section: Methodologiesmentioning

confidence: 99%

Section: Methodologiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of an alternative chlorine production process for energy saving toward sustainability

Ghannadzadeh

Sadeqzadeh

2016

Env Prog and Sustain Energy

Self Cite

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Exergy analysis in ProSimPlus ® simulation software: A focus on exergy efficiency evaluation

Gourmelon

Hétreux

Floquet

et al. 2015

Computers & Chemical Engineering

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General methodology for exergy balance in ProSimPlus® process simulator

Ghannadzadeh

Hétreux

Baudouin³

et al. 2012

Energy

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International audienceThis paper presents a general methodology for exergy balance in chemical and thermal processes integrated in ProSimPlus® as a well-adopted process simulator for energy efficiency analysis. In this work, as well as using the general expressions for heat and work streams, all of exergy balance is presented within only one software in order to fully automate exergy analysis. In addition, after exergy balance, the essential elements such as source of irreversibility for exergy analysis are presented to help the user for modifications on either process or utility system. The applicability of the proposed methodology in ProSimPlus® is shown through a simple scheme of Natural Gas Liquids (NGL) recovery process and its steam utility system. The methodology does not only provide the user with necessary exergetic criteria to pinpoint the source of exergy losses, it also helps the user to find the way to reduce the exergy losses. These features of the proposed exergy calculator make it preferable for its implementation in ProSimPlus® to define the most realistic and profitable retrofit projects on the existing chemical and thermal plants

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General Methodology for Exergy Balance in a Process Simulator

Cited by 5 publications

References 5 publications

Evaluation of an alternative chlorine production process for energy saving toward sustainability

Evaluation of an alternative chlorine production process for energy saving toward sustainability

Exergy analysis in ProSimPlus ® simulation software: A focus on exergy efficiency evaluation

General methodology for exergy balance in ProSimPlus® process simulator

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