Compressor shaft work targeting using new numerical exergy problem table algorithm (Ex-PTA) in sub-ambient processes

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dc.contributor.authorHamsani, Muhammad Nurheilmien_NZ
dc.contributor.authorLiew, Peng Yenen_NZ
dc.contributor.authorWalmsley, Timothy Gordonen_NZ
dc.contributor.authorWan Alwi, Sharifah Rafidahen_NZ
dc.date.accessioned2019-12-10T21:14:40Z
dc.date.available2018-01-01en_NZ
dc.date.available2019-12-10T21:14:40Z
dc.date.issued2018en_NZ
dc.description.abstractOne of the major challenges faced by energy intensive industries is an excessive greenhouse gas emission to the atmosphere due to high consumption of fossil fuels throughout the production processes. Due to high electricity usage in intensive industries, it is strongly advisable to all the engineers and other stakeholders to reduce the amount of energy needed for production, thus reducing carbon footprints. This is because the power generation industry emits approximately 37 % of total carbon dioxide emission to the atmosphere. Process improvement via Process Integration enhances the process energy efficiency, which contributes to the minimisation of fossil fuels and electricity consumption. Sub-ambient processes with refrigeration system are one of the highly energy intensive processes, which consumes a vast amount of electrical energy to run the compressors for fulfilling the process cooling demand. It is crucial to optimise the process-utility heat transfer in the system including the placement of compressors and expanders to minimise the exergy losses and shaft work consumption. This paper presents a combined energy analysis technique of Pinch Analysis and Exergy Analysis to determine exergy losses and compressor shaft work targeting in sub-ambient processes via a novel numerical approach known as the Exergy Problem Table Algorithm (Ex-PTA). The validity of the novel approach is demonstrated by using an illustrated case study. Based on the new numerical method, the total exergy loss in the process is 4.42 kW which is equivalent to 7.4 kW potential savings of compressor shaft work. In the economic analysis, the wasted potential shaft work costs a loss of approximately 19,926 MYR/y which should be avoided to minimise process operating cost.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationHamsani, M. N., Liew, P. Y., Walmsley, T. G., & Wan Alwi, S. R. (2018). Compressor shaft work targeting using new numerical exergy problem table algorithm (Ex-PTA) in sub-ambient processes. Chemical Engineering Transactions, 63, 283–288. https://doi.org/10.3303/CET1863048en
dc.identifier.doi10.3303/CET1863048en_NZ
dc.identifier.eissn2283-9216en_NZ
dc.identifier.isbn9788895608617en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/13296
dc.language.isoen
dc.publisherAIDIC Servizi S.r.l.
dc.relation.isPartOfChemical Engineering Transactionsen_NZ
dc.relation.urihttps://www.cetjournal.it/index.php/cet/article/view/CET1863048
dc.rightsCopyright © 2018, AIDIC Servizi S.r.l. Used with permission.
dc.titleCompressor shaft work targeting using new numerical exergy problem table algorithm (Ex-PTA) in sub-ambient processesen_NZ
dc.typeJournal Article
pubs.begin-page283
pubs.elements-id249779
pubs.end-page288
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/2024 PBRF
pubs.organisational-group/Waikato/DHECS
pubs.organisational-group/Waikato/DHECS/2024 PBRF - DHEC
pubs.organisational-group/Waikato/DHECS/SENG
pubs.organisational-group/Waikato/DHECS/SENG/2024 PBRF - SENG
pubs.publication-statusPublisheden_NZ
pubs.user.infoWalmsley, Timothy (timothyw@waikato.ac.nz)
pubs.volume63en_NZ
uow.verification.statusverified
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