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The work region and total work capability of integrated energy system: Concepts, models, and mechanisms.

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Title: The work region and total work capability of integrated energy system: Concepts, models, and mechanisms.
Authors: Zhou, Tianshuo1 (AUTHOR), Wang, Dan1,2 (AUTHOR), Jia, Hongjie1,2 (AUTHOR), Xiao, Jun1,2 (AUTHOR), Li, Yizhe1 (AUTHOR), Cheng, Hao1 (AUTHOR)
Source: Applied Energy. Sep2025, Vol. 394, pN.PAG-N.PAG. 1p.
Subjects: Linear operators, Energy consumption, Energy levels (Quantum mechanics), Energy development, Energy industries
Abstract: Exergy is the quantification of the work capability of energy. Accurately characterizing the limits and scope of the work potential within an integrated energy system (IES) is a crucial foundation for achieving energy-quality matching, hierarchical utilization, and enhancing the level of energy utilization. Based on the "region" method, this paper first establishes a work region model for the IES. It demonstrates a linear mapping relationship between the operating point of the work region and that of the operation region, and proves the isometric, similarity, and nonlinear geometric transformation relationships between the work region and the operation region in a multi-dimensional space. Furthermore, an improved dichotomy method is proposed as a solution for determining the security boundary of the work region, balancing both computational accuracy and efficiency. Subsequently, a model for the maximum total work capability (TWC) and the TWC curve of the IES is established. Based on the mathematical relationship between TWC and total supply capability (TSC), three methods for calculating the maximum TWC are proposed. Finally, through three typical case studies, the operation region and TSC were used as comparison benchmarks to validate the accuracy and superiority of the proposed model and method, revealing the phenomenon of local work capability decay under different operating conditions. The research presented in this paper contributes to the collaborative development of energy quantity and quality in IES, providing essential theoretical and technical support for the planning, operation, and energy market transactions of IES. • The concept and model of the work region of the IES are proposed. • The mathematical relationship between the work region and the operation region is proven. • The concept, model, and calculation method for the total work capability are proposed. • A method for determining the security boundary of the work region is proposed. • The phenomenon of local work capability decay in the IES is revealed. [ABSTRACT FROM AUTHOR]
Copyright of Applied Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 185779555
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: The work region and total work capability of integrated energy system: Concepts, models, and mechanisms.
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  Data: <searchLink fieldCode="JN" term="%22Applied+Energy%22">Applied Energy</searchLink>. Sep2025, Vol. 394, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Linear+operators%22">Linear operators</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+levels+%28Quantum+mechanics%29%22">Energy levels (Quantum mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+development%22">Energy development</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+industries%22">Energy industries</searchLink>
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  Data: Exergy is the quantification of the work capability of energy. Accurately characterizing the limits and scope of the work potential within an integrated energy system (IES) is a crucial foundation for achieving energy-quality matching, hierarchical utilization, and enhancing the level of energy utilization. Based on the "region" method, this paper first establishes a work region model for the IES. It demonstrates a linear mapping relationship between the operating point of the work region and that of the operation region, and proves the isometric, similarity, and nonlinear geometric transformation relationships between the work region and the operation region in a multi-dimensional space. Furthermore, an improved dichotomy method is proposed as a solution for determining the security boundary of the work region, balancing both computational accuracy and efficiency. Subsequently, a model for the maximum total work capability (TWC) and the TWC curve of the IES is established. Based on the mathematical relationship between TWC and total supply capability (TSC), three methods for calculating the maximum TWC are proposed. Finally, through three typical case studies, the operation region and TSC were used as comparison benchmarks to validate the accuracy and superiority of the proposed model and method, revealing the phenomenon of local work capability decay under different operating conditions. The research presented in this paper contributes to the collaborative development of energy quantity and quality in IES, providing essential theoretical and technical support for the planning, operation, and energy market transactions of IES. • The concept and model of the work region of the IES are proposed. • The mathematical relationship between the work region and the operation region is proven. • The concept, model, and calculation method for the total work capability are proposed. • A method for determining the security boundary of the work region is proposed. • The phenomenon of local work capability decay in the IES is revealed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Applied Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Sep2025
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