ISO 5714:2023

INTERNATIONAL ISO
STANDARD 5714
First edition
2023-08
Clean cookstoves and clean cooking
solutions — Test protocols for
institutional cookstoves
Reference number
© ISO 2023
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
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 4
5 Emissions and energy performance of institutional cookstoves tested in the
laboratory . 4
5.1 General . 4
5.2 ISO 19867-1:2018, Clauses 5 and 6, laboratory test methods with exceptions for
institutional cookstoves . . 5
5.2.1 Volume of water . 5
5.2.2 Cooking vessel lids . 6
5.2.3 Platform scale method . 6
5.2.4 Pre-evaporation method . 6
5.2.5 Char remaining after a test phase . 7
5.2.6 Test phase duration(s) and power level(s) . 7
5.2.7 Institutional cookstove testing protocol . 7
5.3 ISO 19869:2019, 7.6, controlled cooking test with exceptions for institutional
cookstoves . 8
5.4 Emissions testing for institutional cookstoves with multiple chimneys . 8
6 Emissions and energy performance of institutional cookstoves tested in place (in
situ) . 9
6.1 General . 9
6.2 Water-heating test (in situ), ISO 19867-1:2018, Clauses 5 and 6, with exceptions
for institutional cookstoves . 9
6.3 Controlled cooking tests (in situ), ISO 19869:2019, 7.6, with exceptions for
institutional cookstoves . . 9
6.3.1 General . 9
6.3.2 Controlled cooking tests with a water boiling cooking task . 9
6.3.3 Controlled cooking tests without a water boiling cooking task . 9
6.4 Uncontrolled cooking tests (in situ), ISO 19869:2019, 5.3.3, with exceptions for
institutional cookstoves . . 10
6.5 Emissions testing for institutional cookstoves with multiple chimneys . 10
7 Safety testing .10
7.1 General . 10
7.2 Chimney shielding and insulation test . 11
7.3 Safety scoring system. 11
8 Durability testing .12
8.1 General .12
8.2 Specific equipment requirements for durability stress testing of institutional
cookstoves .12
8.3 Extended run test.12
8.4 External and internal impact testing .12
9 Reporting .13
9.1 General .13
9.2 Contents of the test report . 13
Bibliography .17
iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
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 285, Clean cookstoves and clean cooking
solutions.
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
Introduction
This document is applicable for evaluating institutional cookstoves. Institutional cookstoves often have
characteristics requiring specific considerations not already covered under ISO 19867-1 and ISO 19869.
These considerations include, but are not limited to, the following.
— The cooking vessels and contents used with some institutional cookstoves may be too heavy to be
practically removed for weighing, as specified in ISO 19867-1.
— Institutional cookstoves tend to operate at high firepower with substantial release of emissions
requiring specific measurement considerations.
— Built-in-place institutional cookstoves can be difficult or impossible to transport to a laboratory for
testing, and this may require them to be tested in place (in situ).
— For some institutional cookstoves that produce char, the hot char remaining at the end of test phases
can be difficult or unsafe to remove for weighing, as specified in ISO 19867-1 and ISO 19869.
— Institutional cookstoves often have longer operating durations and more specialized cooking tasks
than household cookstoves. Test phases specified in ISO 19867-1:2018, 6.2 are not applicable for
most institutional cookstoves.
— Heat radiation from chimneys is a safety concern because of the higher firepower of institutional
cookstoves compared with household cookstoves.
Because of these reasons, additional guidance is needed for testing institutional cookstoves.
Institutional cookstoves may be tested for either energy performance only (such as efficiency, power
and/or specific energy consumption), or energy performance and air pollutant emissions together.
Institutional cookstoves may be tested separately for safety (see Clause 7) and/or durability (see
Clause 8).
An institutional cookstove may be tested in a laboratory if the cookstove is either portable (can be
transported to the laboratory) or can be built-in-place in the laboratory, as specified in Clause 5. An
institutional cookstove may be tested in situ (rather than, or in addition to, in a laboratory), as specified
in Clause 6.
In Table 1, options are listed for testing institutional cookstoves for energy performance and air
pollutant emissions either in the laboratory or in situ, along with primary energy performance and
emissions metrics. Primary and other metrics are described in Clauses 5 and 6.
The performance of two or more different institutional cookstoves may be compared with the same
appropriate protocol options and test conditions, as specified in this document.
It is common for an institutional cookstove to be one element of larger, multi-component systems. These
systems may include multiple fuel/energy sources or modes of operation. Therefore, multiple tests or
protocols may be required to evaluate the range of potential use scenarios for a given cooking system.
v
---------------------- Pa
...