GB/T 14909-2021Technical guidelines for exergy analysis in energy systems (English PDF)
能量系统 分析技术导则
Also coversGB/T 14909-2021/XG1-2023
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Issued by
State Administration for Market Regulation; Standardization Administration of China
Level / Type
National · Recommended
Issue date
April 30, 2021
Implementation date
November 1, 2021
Scope
GB/T 14909-2021 is the English-translated version of 能量系统 分析技术导则.
GB/T 14909-2021 is the Chinese standard "Technical guidelines for exergy analysis in energy systems". Its scope clause reads: This document specifies the evaluation indicators for calculation, accountancy (balance) and analysis in energy system analysis, as well as the analysis step.
This document applies to the analysis of unit equipment, processes, technological processes or systems that involve energy utilization or energy conversion; it also applies to comprehensive Energy system analysis that considers economic performance or ecological environmental impact, as well as energy supply plan planning, energy auditing and other energy management tasks. Its clauses include terms and definitions.
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Document preview — GB/T 14909-2021
National Standard of the People's Republic of China
- ICS
- 27.010
- Classification
- F 01
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 calculation
- 5 Accounting (balance)
- 6 Analysis of evaluation indicators
- 7 Steps of analysis
- Appendix A (Normative) Value and enthalpy value, balance and loss calculation method
- Appendix B (informative) Energy system analysis example
1 Scope
This document specifies the evaluation indicators for calculation, accountancy (balance) and analysis in energy system analysis, as well as the analysis step.
This document applies to the analysis of unit equipment, processes, technological processes or systems that involve energy utilization or energy conversion; it also applies to comprehensive
Energy system analysis that considers economic performance or ecological environmental impact, as well as energy supply plan planning, energy auditing and other energy management tasks.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 2587 General rules for energy balance of energy-consuming equipment
GB/T 3102.4 Thermal quantity and unit
GB/T 3484 General Principles of Enterprise Energy Balance
GB/T 17781 Basic Concepts of Technical Energy System
GB/T 35071 Energy System Optimization Guide
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 System
An analysis object with a clear boundary determined according to the purpose of the research.
Note. In theoretical analysis, it is also called system, which can be divided into multiple subsystems according to certain research purposes and boundary division principles.
3.2 Environmental reference state
An idealized outside world with limited conditions, which is selected from the categories of the earth, such as the atmosphere, the surface, and the ocean, in a state of complete equilibrium.
It is composed of a fixed reference material system (see 4.1), and has an environmental reference temperature of 298.15K (25°C) and an environmental reference of 100kPa
State pressure (see 7.2) is the numerical benchmark for analysis and calculation.
3.3 exergy
The system is reversible from any state (with a certain temperature, pressure and chemical composition) to a state of equilibrium with the reference state of the environment
The work done to the outside world in the process.
3.4 Internalexergyloss
Due to the irreversibility of the internal process of the system, the system's functional capacity is reduced.
GB 16780 | GB/T 13469 | GB/T 15911 | GB 28381 | GB 12021.4 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 23 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 14909
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 14909-2021 | Technical guidelines for exergy analysis in energy systems | current revision | Current, with Amendment 1 of 2023 |
| GB/T 14909-2005 | Technical guidelines for exergy analysis in energy systems | previous revision | Superseded |
This page sells the current edition, GB/T 14909-2021. Earlier editions are listed for reference only.
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