Exergy-Based Performance Evaluation of a Multi-Unit Hydropower System: A Case Study of the Upper Tamakoshi Hydropower Project in Nepal.
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| Title: | Exergy-Based Performance Evaluation of a Multi-Unit Hydropower System: A Case Study of the Upper Tamakoshi Hydropower Project in Nepal. |
|---|---|
| Authors: | Oli, Sharad Kumar1 (AUTHOR), Rasul, Mohammad G.1 (AUTHOR) m.rasul@cqu.edu.au, Neupane, Arjun1 (AUTHOR) |
| Source: | Energies (19961073). May2026, Vol. 19 Issue 10, p2255. 15p. |
| Subject Terms: | *Exergy, *Sustainability, *Ecological impact, *Thermodynamics, *Energy consumption, *Water power |
| Geographic Terms: | Nepal |
| Abstract: | The objective of this work is to present sustainability analysis and performance evaluation of six hydropower units through exergy-based indices. The method of exergy analysis, based on the first and second laws of thermodynamics, was utilized to evaluate system irreversibility and environmental impact. The Exergy Efficiency, Sustainability Efficiency Index (SEI), and Exergy Ecological Index (ECEI) were determined and plotted in MATLAB. The efficiency and exergy performance results show that Unit 6 had the highest exergy efficiency at 89.3%, and Unit 1 had the least at 82.1%. The values of SEI and ECEI showed that elevated exergy efficiency contributes to increasing sustainability and ecological performance in parallel. The results demonstrate that exergy analysis can provide a broader and more accurate measure of system performance than energy analysis in hydroelectric power systems. The approach shows that local reference environmental conditions must be incorporated to establish system equilibrium. It also suggests that exergy analysis should be used as a standard tool for the optimization and performance management of hydropower plants. Its integration would help the operators take measures against malfunction, minimize losses and improve the environmental and thermodynamic sustainability of energy systems. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 194141370 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Exergy-Based Performance Evaluation of a Multi-Unit Hydropower System: A Case Study of the Upper Tamakoshi Hydropower Project in Nepal. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Oli%2C+Sharad+Kumar%22">Oli, Sharad Kumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rasul%2C+Mohammad+G%2E%22">Rasul, Mohammad G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.rasul@cqu.edu.au</i><br /><searchLink fieldCode="AR" term="%22Neupane%2C+Arjun%22">Neupane, Arjun</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. May2026, Vol. 19 Issue 10, p2255. 15p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Exergy%22">Exergy</searchLink><br />*<searchLink fieldCode="DE" term="%22Sustainability%22">Sustainability</searchLink><br />*<searchLink fieldCode="DE" term="%22Ecological+impact%22">Ecological impact</searchLink><br />*<searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+power%22">Water power</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Nepal%22">Nepal</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The objective of this work is to present sustainability analysis and performance evaluation of six hydropower units through exergy-based indices. The method of exergy analysis, based on the first and second laws of thermodynamics, was utilized to evaluate system irreversibility and environmental impact. The Exergy Efficiency, Sustainability Efficiency Index (SEI), and Exergy Ecological Index (ECEI) were determined and plotted in MATLAB. The efficiency and exergy performance results show that Unit 6 had the highest exergy efficiency at 89.3%, and Unit 1 had the least at 82.1%. The values of SEI and ECEI showed that elevated exergy efficiency contributes to increasing sustainability and ecological performance in parallel. The results demonstrate that exergy analysis can provide a broader and more accurate measure of system performance than energy analysis in hydroelectric power systems. The approach shows that local reference environmental conditions must be incorporated to establish system equilibrium. It also suggests that exergy analysis should be used as a standard tool for the optimization and performance management of hydropower plants. Its integration would help the operators take measures against malfunction, minimize losses and improve the environmental and thermodynamic sustainability of energy systems. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194141370 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19102255 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 2255 Subjects: – SubjectFull: Exergy Type: general – SubjectFull: Sustainability Type: general – SubjectFull: Ecological impact Type: general – SubjectFull: Thermodynamics Type: general – SubjectFull: Energy consumption Type: general – SubjectFull: Water power Type: general – SubjectFull: Nepal Type: general Titles: – TitleFull: Exergy-Based Performance Evaluation of a Multi-Unit Hydropower System: A Case Study of the Upper Tamakoshi Hydropower Project in Nepal. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Oli, Sharad Kumar – PersonEntity: Name: NameFull: Rasul, Mohammad G. – PersonEntity: Name: NameFull: Neupane, Arjun IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 10 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
