Energy performance of buildings - Building automation, controls and building management - Part 2: Explanation and justification of ISO 52127-1 (ISO/TR 52127-2:2021)

This Technical Report refers to EN 16947-1:2015, Building Management System - Module M10-12.
It contains information to support the correct understanding, use and national adaption of EN 16947-1.
This Technical Report does not contain any normative provision.

Performance énergétique des bâtiments - Automatisation, régulation et gestion technique du bâtiment - Partie 2: Explication et justification de l'ISO 52127-1 (ISO/TR 52127-2:2021)

Energijske lastnosti stavb - Avtomatizacija, regulacija in upravljanje stavb - 2. del: Razlaga in utemeljitev ISO 52127-1 (ISO/TR 52127-2:2021)

General Information

Status
Published
Public Enquiry End Date
03-May-2020
Publication Date
04-Mar-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-Feb-2021
Due Date
02-May-2021
Completion Date
05-Mar-2021

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SLOVENSKI STANDARD
SIST-TP CEN ISO/TR 52127-2:2021
01-april-2021

Energijske lastnosti stavb - Avtomatizacija, regulacija in upravljanje stavb - 2. del:

Razlaga in utemeljitev ISO 52127-1 (ISO/TR 52127-2:2021)
Energy performance of buildings - Building automation, controls and building
management - Part 2: Explanation and justification of ISO 52127-1 (ISO/TR 52127-
2:2021)
Performance énergétique des bâtiments - Automatisation, régulation et gestion

technique du bâtiment - Partie 2: Explication et justification de l'ISO 52127-1 (ISO/TR

52127-2:2021)
Ta slovenski standard je istoveten z: CEN ISO/TR 52127-2:2021
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
SIST-TP CEN ISO/TR 52127-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
---------------------- Page: 2 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
CEN ISO/TR 52127-2
TECHNICAL REPORT
RAPPORT TECHNIQUE
February 2021
TECHNISCHER BERICHT
ICS 91.120.10 Supersedes CEN/TR 16947-2:2016
English Version
Energy performance of buildings - Building automation,
controls and building management - Part 2: Explanation
and justification of ISO 52127-1 (ISO/TR 52127-2:2021)
Performance énergétique des bâtiments -
Automatisation, régulation et gestion technique du
bâtiment - Partie 2: Explication et justification de l'ISO
52127-1 (ISO/TR 52127-2:2021)

This Technical Report was approved by CEN on 23 June 2020. It has been drawn up by the Technical Committee CEN/TC 247.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TR 52127-2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
CEN ISO/TR 52127-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
CEN ISO/TR 52127-2:2021 (E)
European foreword

This document (CEN ISO/TR 52127-2:2021) has been prepared by Technical Committee ISO/TC 205

"Building environment design" in collaboration with Technical Committee CEN/TC 247 “Building

Automation, Controls and Building Management” the secretariat of which is held by SNV.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes CEN/TR 16947-2:2016.
Endorsement notice

The text of ISO/TR 52127-2:2021 has been approved by CEN as CEN ISO/TR 52127-2:2021 without any

modification.
---------------------- Page: 5 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
---------------------- Page: 6 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
TECHNICAL ISO/TR
REPORT 52127-2
First edition
2021-02
Energy performance of buildings —
Building automation, controls and
building management —
Part 2:
Explanation and justification of ISO
52127-1
Performance énergétique des bâtiments — Automatisation,
régulation et gestion technique du bâtiment —
Partie 2: Explication et justification de l'ISO 52127-1
Reference number
ISO/TR 52127-2:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols ......................................................................................................................................................................................................................... 1

5 Method description ........................................................................................................................................................................................... 1

5.1 Effect of building automation and control (BAC) and technical building

management (TBM) ............................................................................................................................................................................ 1

5.2 Control strategy ...................................................................................................................................................................................... 2

5.3 Rationale....................................................................................................................................................................................................... 3

5.4 Time steps ................................................................................................................................................................................................... 3

5.4.1 General...................................................................................................................................................................................... 3

5.4.2 Assumption ........................................................................................................................................................................... 3

5.4.3 Data input — Item 1...................................................................................................................................................... 3

5.4.4 Simplified input ................................................................................................................................................................ 4

5.4.5 Calculation information ............................................................................................................................................. 4

5.5 List of functions covered by the method........................................................................................................................... 4

5.5.1 Setpoint management (BMS function 1) ..................................................................................................... 4

5.5.2 Runtime management (BMS function 2)..................................................................................................... 5

5.5.3 Sequencing of multiple generators (BMS function 3) ...................................................................... 6

5.5.4 Local energy production and renewable energies (BMS function 4) ................................. 7

5.5.5 Heat recovery and heat shifting (BMS function 5) ............................................................................. 7

5.5.6 Smart grid interactions and peak shaving (BMS function 6) ..................................................... 8

6 Method selection .................................................................................................................................................................................................. 8

7 Information on the accompanying spreadsheet .................................................................................................................. 8

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 205, Building environment design, in

collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/

TC 247, Building Automation, Controls and Building Management, in accordance with the Agreement on

technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 52127 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
---------------------- Page: 10 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
Introduction

This document consolidates information that is considered important for users to properly understand,

apply and nationally adopt the EPB standards.

The detailed technical rules in CEN/TS 16629 ask for a clear separation between normative and

informative contents:

— to avoid flooding and confusing the actual normative part with informative content;

— to reduce the page count of the actual standard;
— to facilitate understanding of the package.

Therefore, each EPB standard should be accompanied by an informative Technical Report, like this

document, where all informative contents are collected.

Table 1 shows the relative position of this document within the EPB set of standards.

© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
vi © ISO 2021 – All rights reserved
Table 1 — Position of this document within the EPB set of standards
Over- Building Technical building system
arching (as such)
Building au-
Sub Ventila- Humidifi- Dehumidi- Domestic PV,
Descriptions Descriptions Descriptions Heating Cooling Lighting tomation and
module tion cation fication hot waters wind…
control
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General General General
Common
terms and
definitions; Building en-
2 Needs
symbols, ergy needs
units and
subscripts
(Free)
Maximum
Indoor con-
3 Application load and
ditions with-
power
out systems
Ways to ex- Ways to ex- Ways to ex-
4 press energy press energy press energy
performance performance performance
Building
Heat transfer
functions Emission
5 by transmis-
and building and control
sion
boundaries
Building oc- Heat transfer
cupancy and by infiltra- Distribution
operating tion and and control
conditions ventilation
Aggregation
of energy
Internal heat Storage and
7 services
gains control
and energy
carriers
Building par- Solar heat Generation
titioning gains and control
NOTE The shaded modules are not applicable.
---------------------- Page: 12 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
© ISO 2021 – All rights reserved vii
Table 1 (continued)
Over- Building Technical building system
arching (as such)
Building au-
Sub Ventila- Humidifi- Dehumidi- Domestic PV,
Descriptions Descriptions Descriptions Heating Cooling Lighting tomation and
module tion cation fication hot waters wind…
control
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Load dis-
Calculated Building dy-
patching and
9 energy per- namics (ther-
operating
formance mal mass)
conditions
Measured Measured Measured
10 energy per- energy per- energy per-
formance formance formance
11 Inspection Inspection Inspection
Ways to ex-
12 press indoor BMS x
comfort
External
13 environment
conditions
Economic
calculation
NOTE The shaded modules are not applicable.
---------------------- Page: 13 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
---------------------- Page: 14 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
TECHNICAL REPORT ISO/TR 52127-2:2021(E)
Energy performance of buildings — Building automation,
controls and building management —
Part 2:
Explanation and justification of ISO 52127-1
1 Scope

This document contains information to support the correct understanding, use and adoption of

ISO 52127-1.
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 52127-1, Energy performance of buildings — Building management system — Part 1: Module M10-12

ISO 7345, Thermal insulation of buildings and building components — Physical quantities and definitions

ISO 52000-1, Energy performance of buildings — Overarching EPB assessment — Part 1: General

framework and procedures
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 7345, ISO 52000-1 and

ISO 52127-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Symbols

For the purposes of this document, the symbols given in ISO 52000-1 and ISO 52127-1 apply.

5 Method description
5.1 Effect of building automation and control (BAC) and technical building
management (TBM)

The key-role of building automation and control and TBM is to ensure the balance between the desired

human comfort - which should be maximal, and energy used to obtain this goal - which should be

minimal.

The scope of BAC and TBM covers in accordance with their role from one side all technical building

systems (where the effect of the BAC is used in the calculation procedures) and from another side the

global optimization of the energy performance of a building.
© ISO 2021 – All rights reserved 1
---------------------- Page: 15 ----------------------
SIST-TP CEN ISO/TR 52127-2:2021
ISO/TR 52127-2:2021(E)
Several categories of controls could be identified.

— Technical building systems specific controls: these controllers are dedicated to the physical chain of

transformation of the energy, from generation, to storage, distribution and emission. We find them

in the matrix starting with the modules M3-5 to M9-5 and finishing with M3-8 till M9-8. We could

consider that one controller exists by module, but sometimes one controller does the control among

several modules. More often, these controllers are communicating between them via a standardized

open bus, such as BACnet, KNX or LON.

— BAC used for all or several technical building systems that do multidiscipline (heating, cooling,

ventilation, DHW, lighting) optimization and complex control functions. For example, one of them is

INTERLOCK, a control function that avoids heating and cooling at the same time.

— If all technical building system are used in the building, we have (depending of the size of the

building) a technical building management system. Specific global functions are implemented here

and are necessary to reach the key-role mentioned above. Usually, in this case, an interrelation with

the building as such (module M2) will occur, mainly to take in consideration the building needs;

for example, due to outside temperature, taking into account the inertia of the building when the

control will reach the set point in a room.

In a control system dedicated to a building, in this case BAC and TBM, we can distinguish three main

characteristics:
— control accuracy,
— control function,
— control strategy.

Technical building management systems are implemented to realize an overall building operation

strategy by interdisciplinary orchestration of building energy systems (heating, cooling, ventilation,

lighting) whereas systems are controlled by BAC functions. Further information about control accuracy

and control functions can be found in ISO/TR 52120-2. ISO 52120-1 describes two approaches, how

to evaluate the contribution of building automation and how to control the energy performance of

buildings. This document is dedicated to control strategy and technical building management issues

covered by ISO 52127-1.
5.2 Control strategy
The control strategy is applied to achieve a given level of control t
...

SLOVENSKI STANDARD
kSIST-TP FprCEN ISO/TR 52127-2:2020
01-april-2020

Energijske lastnosti stavb - Avtomatizacija, regulacija in upravljanje stavb - 2. del:

Razlaga in utemeljitev ISO 52127-1 (ISO/PRF TR 52127-2:2020)
Energy performance of buildings - Building automation, controls and building

management - Part 2: Explanation and justification of ISO 52127-1 (ISO/PRF TR 52127-

2:2020)
Performance énergétique des bâtiments - Automatisation, régulation et gestion

technique du bâtiment - Partie 2: Explication et justification de l'ISO 52127-1 (ISO/PRF

TR 52127-2:2020)
Ta slovenski standard je istoveten z: FprCEN ISO/TR 52127-2
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
kSIST-TP FprCEN ISO/TR 52127-2:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
---------------------- Page: 2 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
TECHNICAL ISO/TR
REPORT 52127-2
First edition
Energy performance of buildings —
Building automation, controls and
building management —
Part 2:
Explanation and justification of ISO
52127-1
Performance énergétique des bâtiments — Automatisation,
régulation et gestion technique du bâtiment —
Partie 2: Explication et justification de l'ISO 52127-1
PROOF/ÉPREUVE
Reference number
ISO/TR 52127-2:2020(E)
ISO 2020
---------------------- Page: 3 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
ISO/TR 52127-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
ISO/TR 52127-2:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols ......................................................................................................................................................................................................................... 1

5 Method description ........................................................................................................................................................................................... 1

5.1 Effect of building automation and control (BAC) and technical building

management (TBM) ............................................................................................................................................................................ 1

5.2 Control strategy ...................................................................................................................................................................................... 2

5.3 Rationale....................................................................................................................................................................................................... 3

5.4 Time steps ................................................................................................................................................................................................... 3

5.4.1 General...................................................................................................................................................................................... 3

5.4.2 Assumption ........................................................................................................................................................................... 3

5.4.3 Data input — Item 1...................................................................................................................................................... 3

5.4.4 Simplified input ................................................................................................................................................................ 4

5.4.5 Calculation information ............................................................................................................................................. 4

5.5 List of functions covered by the method........................................................................................................................... 4

5.5.1 Setpoint management (BMS function 1) ..................................................................................................... 4

5.5.2 Runtime management (BMS function 2)..................................................................................................... 5

5.5.3 Sequencing of multiple generators (BMS function 3) ...................................................................... 6

5.5.4 Local energy production and renewable energies (BMS function 4) ................................. 7

5.5.5 Heat recovery and heat shifting (BMS function 5) ............................................................................. 7

5.5.6 Smart grid interactions and peak shaving (BMS function 6) ..................................................... 8

6 Method selection .................................................................................................................................................................................................. 8

7 Information on the accompanying spreadsheet .................................................................................................................. 8

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2020 – All rights reserved PROOF/ÉPREUVE iii
---------------------- Page: 5 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
ISO/TR 52127-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 205, Building environment design, in

collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/

TC 247, Building Automation, Controls and Building Management, in accordance with the Agreement on

technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 52127 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv PROOF/ÉPREUVE © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
ISO/TR 52127-2:2020(E)
Introduction

The CENSE project, the discussions between CEN and the concerted action highlighted the high

page count of the entire package due to a lot of “textbook” information. This resulted in flooding and

confusing the normative text.

A huge amount of informative contents should be recorded and available for users to properly

understand, apply and nationally adapt the EPB standards.

The detailed technical rules CEN/TS 16629 ask for a clear separation between normative and

informative contents:

— to avoid flooding and confusing the actual normative part with informative content;

— to reduce the page count of the actual standard;
— to facilitate understanding of the package.

Therefore each EPB standard should be accompanied by an informative technical report, like this one,

where all informative contents is collected.

Table 1 shows the relative position of tis standard within the EPB set of standards.

Table 1 — Position of this standard within the EPD set of standards
Over- Building Technical Building System
arching (as such)
Building
Domes- PV,

Submod- Descrip- Descrip- Descrip- Heat- Cool- Ventila- Humidifi- Dehumidifi- Light- automa-

tic Hot wind,
ule tions tions tions ing ing tion cation cation ing tion and
waters ..
control
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
1 General General General
Common
terms and
defini- Building
2 tions; Energy Needs
symbols, Needs
units and
subscripts
(Free)
Indoor
Maximum
Applica- Condi-
3 Load and
tion tions
Power
without
Systems
Ways to Ways to Ways to
Express Express Express
4 Energy Energy Energy
Perfor- Perfor- Perfor-
mance mance mance
Building
Func- Heat
Emission
tions and Transfer
5 and con-
Building by Trans-
trol
Bounda- mission
ries
Building Heat
Occupan- Transfer
Distribu-
cy and by Infil-
6 tion and
Operating tration
control
Condi- and Ven-
tions tilation
© ISO 2020 – All rights reserved PROOF/ÉPREUVE v
---------------------- Page: 7 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
ISO/TR 52127-2:2020(E)
Table 1 (continued)
Over- Building Technical Building System
arching (as such)
Building
Domes- PV,

Submod- Descrip- Descrip- Descrip- Heat- Cool- Ventila- Humidifi- Dehumidifi- Light- automa-

tic Hot wind,
ule tions tions tions ing ing tion cation cation ing tion and
waters ..
control
sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11
Aggre-
gation of
Energy Storage
Internal
7 Servic- and con-
Heat Gains
es and trol
Energy
Carriers
Building Genera-
Solar Heat
8 Partition- tion and
Gains
ing control
Load
Calculat- Building
dispatch-
ed Energy Dynamics
9 ing and
Perfor- (thermal
operating
mance mass)
conditions
Measured Measured Measured
Energy Energy Energy
Perfor- Perfor- Perfor-
mance mance mance
11 Inspection Inspection Inspection
Ways to
Express
12 BMS x
Indoor
Comfort
External
Environ-
ment Con-
ditions
Economic
14 Calcula-
tion
vi PROOF/ÉPREUVE © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
kSIST-TP FprCEN ISO/TR 52127-2:2020
TECHNICAL REPORT ISO/TR 52127-2:2020(E)
Energy performance of buildings — Building automation,
controls and building management —
Part 2:
Explanation and justification of ISO 52127-1
1 Scope

This document contains information to support the correct understanding, use and adoption of

ISO 52127-1.
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 52127-1, Building Management System — Module M10-12

ISO 7345, Thermal insulation — Physical quantities and definitions (ISO 7345:1987)

ISO 52000-1, Energy performance of buildings — Overarching EPB assessment — Part 1: General

framework and procedures
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 7345, ISO 52000-1 and

ISO 52127-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Symbols

For the purposes of this document, the symbols given in ISO 52000-1 and ISO 52127-1 apply.

5 Method description
5.1 Effect of building automation and control (BAC) and technical building
management (TBM)

The key-role of building automation and control and TBM is to ensure the balance between the desired

human comfort - which should be maximal, and energy used to obtain this goal - which should be

minimal.

The scope of BAC and TBM covers in accordance with their role from one side all technical building

systems (where the effect of the BAC is used in the calculation procedures) and from another side the

global optimization of the energy performance of a building.
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ISO/TR 52127-2:2020(E)
We could identify several categories of controls:

— Technical building systems specific controls: these controllers are dedicated to the physical chain of

transformation of the energy, from generation, to storage, distribution and emission. We find them

in the matrix starting with the Modules M3-5 to M9-5 and finishing with M3-8 till M9-8. We could

consider that one controller exists by module, but sometimes one controller does the control among

several modules. More often, these controllers are communicating between them via a standardized

open bus, such as BACnet, KNX or LON.

— BAC used for all or several technical building systems that do multidiscipline (heating, cooling,

ventilation, DHW, lighting) optimization and complex control functions. For example, one of them is

INTERLOCK, a control function that avoids heating and cooling at the same time.

— If all technical building system are used in the building, we have (depending of the size of the

building) a technical building management system. Specific global functions are implemented here

and are necessary to reach the key-role mentioned above. Usually, in this case, an interrelation with

the building as such (Module M2) will occur, mainly to take in consideration the building needs;

for example, due to outside temperature, taking into account the inertia of the building when the

control will reach the set point in a room.

In a control system dedicated to a building, in this case BAC and TBM, we can distinguish three main

characteristics:
— Control accuracy,
— Control function,
— Control strategy.

Technical building management systems are implemented to realize an overall building operation

strategy by interdisciplinary orchestration of building energy systems (heating, cooling, ventilation,

lighting) whereas systems are controlled by BAC functions. Further information about control accuracy

and control functions can be found in ISO/TR 52120-2. ISO 52120-1 describes two approaches, how

to evaluate the contribution of building automation and how to control the energy performance of

buildings. This document is dedicated to control strategy and technical building management issues

covered by ISO 52127-1.
5.2 Control strategy

The control strategy is applied to achieve a given level of control to reach a goal. Optimal control

strategies deliver a desired level of control at a minimum cost. A control strategy could consist of a

control function or a group of control functions. An example of a control strategy implemented by a

control function is optimum start, optimum stop or night set back described in EN 12098-1 and

EN 12098-3. The timer function is described in EN 12098-5.

An example of a control strategy that is carried out by a group of control functions is the control strategy

used by intermittence. This function uses several control functions, operation modes, optimum start-

stop and timer at the same time. All elements together are called either building profile or user pattern.

Usually, to implement such building profile, a TBM is a prerequisite.
The most importan
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