Paths combination for HENs retrofit

Osman, Abdelbagi; Mutalib, M.I. Abdul; Mahadzir, Shuhaimi; Amminudin, Kamarul A.

doi:10.1016/j.applthermaleng.2009.04.006

Cited by 13 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Heat duty is used to calculate the exchanger heat transfer area. Then both exchanger pressure drop and heat transfer area are used to calculate the heat transfer coefficients [24].…”

Section: Resultsmentioning

confidence: 99%

“…The approach is typically a combinatorial procedure for screening broader alternatives by combining the available utility paths in HEN systematically to enhance the process-to-process heat recovery with the addition of new heat transfer area [24]. The available utility paths in HEN are combined according to the combination law by Equation (1) [25].…”

Section: Path Combination Approachmentioning

confidence: 99%

“…For example, if 3 paths (A, B, and C) are available in an existing HEN, the possible combinations are a set of unilateral paths (A, B and C) each alone, sets of bilateral combined paths (AB, AC, and BC) and a set of trilateral combined paths (ABC). More detail of path combinations is available in a study introduced by Osman [24].…”

Section: Path Combination Approachmentioning

confidence: 99%

“…Heat transfer area for HEN exchangers after heat-shifting (m 2 ). As per Nie and Zhu [28], Smith [31] and Osman et al [24], the heat transfer coefficients for tube side and shell side can be obtained while considering the exchanger pressure drop. The dimensional constants in the pressure drop Equations (6) and 7are calculated as follows: (A1)…”

Section: A E1 a E2 A E3 A E4 A E5 A E6mentioning

confidence: 99%

See 3 more Smart Citations

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

2019

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Heat duty is used to calculate the exchanger heat transfer area. Then both exchanger pressure drop and heat transfer area are used to calculate the heat transfer coefficients [24].…”

Section: Resultsmentioning

confidence: 99%

Section: Path Combination Approachmentioning

confidence: 99%

Section: Path Combination Approachmentioning

confidence: 99%

Section: A E1 a E2 A E3 A E4 A E5 A E6mentioning

confidence: 99%

See 2 more Smart Citations

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

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…temperature-dependent) thermal properties of streams and with an innovative cost-based criterion for the identification of the most promising topologies. A different approach was proposed by Osman et al [11]; the procedure attempts at generating retrofit options, created by shifting the heat load from HEN utilities through individual utility paths. This method adopts an "Exchanger Minimum Approach Temperature", instead of a ∆T min -based approach at network level; among its limits, the incapability to explore the whole solutions space due to the absence of topological modification.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Thermal analysis and new insights to support decision making in retrofit and relaxation of heat exchanger networks

Piacentino

2011

Applied Thermal Engineering

View full text Add to dashboard Cite

Please cite this article as: A. Piacentino. Thermal analysis and new insights to support decision making in retrofit and relaxation of heat exchanger networks, Applied Thermal Engineering (2011), doi: 10.1016/ j.applthermaleng.2011.07.002 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractPinch analysis offers a rational framework for identifying energy saving targets and designing efficient heat recovery networks, especially in process industry. Several scientists have contributed to improve and automate the original pinch method over the last decades, increasing its capability to deal with a number of specific issues; the expertise of the analyst,however, remains determinant in achievingoptimal results. In this paper a procedure for retrofit of existing networks is proposed, based on an integrate use of several techniques (either existing or innovative). The diagnosis of the existing network and of a "Minimum Energy Requirement" configuration emerges as a useful preliminary instrument for the retrofit study. Then, an innovative spider-type diagram is presented to identify a hierarchic order among a set of retrofit topologies and the most promising relaxation paths for each network topology. The procedure is aimed at offeringa conceptual-interpretative approach to energy analysts, to identify preferential routes in networks' retrofit (and exclude the least promising improvement directions of the existing network); it should be therefore conceived as alternative to algorithms for automatic optimization of heat exchanger networks. The focus is mainly put on the energetic performance of the different schemes (evaluated by thermal analysis of the involved heat exchangers), but the methodology finally enables the energy analyst to identify solutions achieving near-minimum total costs.

show abstract