ISO/TS 23764:2021
(Main)Methodology for achieving non-residential zero-energy buildings (ZEBs)
Methodology for achieving non-residential zero-energy buildings (ZEBs)
This document provides a basic step-by-step approach for achieving non-residential (net) zero-energy buildings (ZEBs). It also describes the basic concept of ZEBs and the items for consideration in this approach. The following are within the scope of this document: — application to non-residential buildings; — annual energy consumption of a ZEB (this includes the operating consumption of the building and excludes the energy consumed by the manufacturing of materials and equipment, and the energy consumed during construction); — renewable energy supply (this can be on-site or off-site, depending on the policy and conditions of the country in which the supply is installed); — application to any climate zone. The following are out of the scope of this document: — recommendations or suggestions for the adoption of any specific technologies and/or equipment and materials that are expected to be continuously innovated (however it does stipulate the technologies for selection); — specific methods or calculation formulae; — commissioning methods.
Méthodologie pour la réalisation de bâtiments non résidentiels énergie zéro
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Standards Content (Sample)
TECHNICAL ISO/TS
SPECIFICATION 23764
First edition
2021-09
Methodology for achieving non-
residential zero-energy buildings
(ZEBs)
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Stepwise approach toward ZEB . 2
4.1 General . 2
4.2 Planning phase . 3
4.2.1 Determining the ZEB stage target: ZEB-ready, nearly ZEB, or (net) ZEB . 3
4.2.2 Reference primary energy consumption and reduction rate targets . 4
4.3 Design phase . 5
4.3.1 General. 5
4.3.2 Setting the outcome . 5
4.3.3 Passive design. 6
4.3.4 Active design. 6
4.3.5 Selection of building materials, equipment and systems . 7
4.3.6 Forecast of primary energy consumption and energy supply for attaining
the targets . 9
4.4 Construction phase . 9
4.4.1 General. 9
4.4.2 Construction plan . 9
4.4.3 Construction and inspection.10
4.4.4 Final check and verification (as built) .10
4.5 Operations and management .10
4.5.1 Fine tuning .10
4.5.2 Understanding the primary energy consumption .10
4.5.3 Comparison between planned primary energy consumption and actual
measurements.10
4.5.4 Optimizing the energy consumption .11
4.5.5 Measurement and feedback .11
5 Examples of evaluations on ZEB .11
Annex A (informative) Example of (net) ZEB evaluation .12
Annex B (informative) Example of a nearly ZEB evaluation .22
Annex C (informative) Example of ZEB-ready evaluation .30
Bibliography .37
Foreword
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This document was prepared by Technical Committee ISO/TC 205, Building environment design
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iv © ISO 2021 – All rights reserved
Introduction
This document aims to apply a methodology for achieving a zero-energy building (ZEB).
Since the Paris Agreement was adopted in the 21st Session of the Conference of the Parties to the
United Nations Framework Convention on Climate Change, all member countries (including emerging
countries) have been required to set a target for reducing their greenhouse gas emissions by 2020
and later. In all countries, reducing energy consumption is the most effective means of mitigating
greenhouse gas emissions.
The building sector takes a 30 % share of the world’s energy consumption, and this contribution appears
[8]
to be increasing . Therefore, reducing the greenhouse gas emissions from this sector is an important
global issue. Ultimately, the energy consumption of the building must be reduced and balanced by
renewable energy to create a (net) ZEB. Such advanced cases have already been constructed.
Although the ultimate goal of achieving ZEBs is clearly understood, its realization has been limited by
practical barriers such as high initial investment. However, as the life cycle of buildings is long, the
design and construction of more energy-efficient buildings is considered as a present attempt rather
than a future one for greenhouse gas reduction. Hence, accelerating the movement toward ZEBs is an
immediate urgency.
From this perspective, this document advocates a step-by-step realization approach for (net) ZEBs.
Its aim is to accelerate the ZEB movement and describe the practical realization of ZEBs. Namely, this
document proposes a practical ZEB approach and outlines the basic considerations during the complete
process of ZEB realization, from design to the operation and maintenance stages.
To accelerate the reduction of greenhouse gases, this document aims to contribute policies and/or
guidelines for disseminating ZEBs that suit the conditions of individual countries, especially those of
emerging countries undergoing rapid urbanization.
To assist understanding of the contents of this document, the following four ZEB examples are included
as annexes:
— (net) ZEB results of evaluating a ZEB renovation of an actual use office building (see Annex A);
— nearly ZEB results of evaluating a ZEB city hall encompassing regional history, climate, and
1) 2)
resources (see Annex B);
— ZEB-ready model of an urban medium-sized office (see Annex C).
1) Net Zero Energy Buildings International Projects of Carbon Neutrality in Buildings (IEA SHC).
2) Three examples toward realizing ZEB were selected from the Net Zero Energy Building Advanced Case Collection
published by The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan (SHASE). The (net) ZEB
example is the Takenaka Corporation Higashi Kanto Branch Office. The nearly ZEB is Unnan City Hall. The ZEB ready
example is the KT Building. The nearly ZEB example in Singapore non-residential building. Reference URL: http://
www .shasej .org/ recommendation/ ZEB %20in %20Japan _2017 _SHASE100th .pdf
TECHNICAL SPECIFICATION ISO/TS 23764:2021(E)
Methodology for achieving non-residential zero-energy
buildings (ZEBs)
1 Scope
This document provides a basic step-by-step approach for achieving non-residential (net) zero-energy
buildings (ZEBs). It also describes the basic concept of ZEBs and the items for consideration in this
approach.
The following are within the scope of this document:
— application to non-residential buildings;
— annual energy consumption of a ZEB (this includes the operating consumption of the building and
excludes the energy consumed by the manufacturing of materials and equipment, and the energy
consumed during construction);
— renewable energy supply (this can be on-site or off-site, depending on the policy and conditions of
the country in which the supply is installed);
— application to any climate zone.
The following are out of the scope of this document:
— recommendations or suggestions for the adoption of any specific technologies and/or equipment
and materials that are expected to be continuously innovated (however it does stipulate the
technologies for selection);
— specific methods or calculation formulae;
— commissioning methods.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 50001:2018, Energy management systems — Requirements with guidance for use
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org
NOTE The terms defined in this clause are detailed in 4.1.
3.1
ZEB-ready
building that prospectively achieves (net) ZEB (3.3) through enhanced insulation suited to building use
and climate, exterior
...
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