ISO 52000-3:2023
Energy performance of buildings — Overarching EPB assessment — Part 3: General principles for determination and reporting of primary energy factors (PEF) and CO2 emission coefficients
This document provides a transparent framework for reporting on the choices related to the procedure to determine primary energy factors (PEFs) and CO2 emission coefficients for energy delivered to and exported from the buildings as described in ISO 52000-1.
It does not include considerations on other topics, e.g. nuclear waste, atmospheric particulate matter, deforestation, food and bioenergy competition, depletion of raw material resources, depletion of the soil.
This document specifies the choices to be made to calculate the PEFs and CO2 emission coefficients related to different energy carriers. PEFs and CO2 emission coefficients for exported energy can be different from those chosen for delivered energy.
This document is primarily intended for supporting and complementing ISO 52000-1 as the latter requires values for the PEFs and CO2 emission coefficients to complete the EPB calculation, however it can also be used for other applications.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols, subscripts and abbreviated terms
4.1 Symbols
4.2 Subscripts
4.3 Abbreviated terms
5 General description of the methods and choices
5.1 Basic principles of the assessment methods
5.1.1 Primary energy factors (PEF)
5.1.2 CO2 emission coefficient
5.1.3 CO2 emission coefficient for an exported energy carrier cr
5.1.4 Assessment boundary
5.1.5 Origin of delivered energies
5.1.6 Accounting methods
5.2 Short description of the choices
6 Set of different choices related to PEF and CO2 emission coefficient
6.1 Choices related to the perimeter — Geographical perimeter
6.2 Choices related to calculation conventions
6.2.1 Time resolution
6.2.2 Sources (time horizon) of the data used
6.2.3 Net calorific value (NCV) or gross calorific value (GCV)
6.3 Choices related to the data
6.3.1 Energy sources to be considered (available energy sources)
6.3.2 Type of CO2 emission coefficients
6.3.3 Conventions related to energy conversion
6.3.4 Conventions for PEF related to exported energy
6.4 Choices related to the assessment methodologies
6.4.1 Energy exchanges with other geographical perimeters
6.4.2 Calculation approaches for multisource generation mix
6.4.3 Allocation of multi energy output system
6.4.4 Life cycle method
Annex A (normative) Template for reporting the choices in the calculation of PEF and CO2 emission coefficient
Annex B (informative) Examples of assessment boundaries
Annex C (informative) Additional explanation and reporting
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols, subscripts and abbreviated terms
4.1 Symbols
4.2 Subscripts
4.3 Abbreviated terms
5 General description of the methods and choices
5.1 Basic principles of the assessment methods
5.1.1 Primary energy factors (PEF)
5.1.2 CO2 emission coefficient
5.1.3 CO2 emission coefficient for an exported energy carrier cr
5.1.4 Assessment boundary
5.1.5 Origin of delivered energies
5.1.6 Accounting methods
5.2 Short description of the choices
6 Set of different choices related to PEF and CO2 emission coefficient
6.1 Choices related to the perimeter — Geographical perimeter
6.2 Choices related to calculation conventions
6.2.1 Time resolution
6.2.2 Sources (time horizon) of the data used
6.2.3 Net calorific value (NCV) or gross calorific value (GCV)
6.3 Choices related to the data
6.3.1 Energy sources to be considered (available energy sources)
6.3.2 Type of CO2 emission coefficients
6.3.3 Conventions related to energy conversion
6.3.4 Conventions for PEF related to exported energy
6.4 Choices related to the assessment methodologies
6.4.1 Energy exchanges with other geographical perimeters
6.4.2 Calculation approaches for multisource generation mix
6.4.3 Allocation of multi energy output system
6.4.4 Life cycle method
Annex A (normative) Template for reporting the choices in the calculation of PEF and CO2 emission coefficient
Annex B (informative) Examples of assessment boundaries
Annex C (informative) Additional explanation and reporting
Bibliography