Clean cookstoves and clean cooking solutions — Field testing methods for cookstoves

This document provides field testing methods to evaluate cooking system performance in real-world conditions. This document is intended to: a) Provide quantitative and qualitative measurements of cooking system performance. Requirements and guidance are provided for evaluation of usage, usability, fuel consumption, energy consumption, power, emissions, safety, and durability. These measurements include uncontrolled and controlled cooking tests. b) Provide guidance for measurements of household air pollution and personal exposure to PM2,5 and CO. c) Provide guidance for field assessments that compare cooking system performance metrics either to defined performance levels or to a counterfactual scenario that enables assessment of whether the new cooking system is improved compared to what would have been observed without the implementation of a new cooking system. d) Provide guidance for prioritizing measurements that balance comprehensiveness and feasibility. The parts of the cooking system include the cookstove, cooking vessel, fuel, user practice, and additional cooking devices (such as pot skirts and retained heat cookers). Several measurements in this document are presented as measurements of "cookstoves" or "cooking devices" for simplicity, but are intended to be interpreted as measurements of cooking systems. Some measurements (usage, kitchen energy consumption, and pollutant exposure) pertain to household-level cooking systems that include all cookstoves, cooking devices, fuels, and user practices in a household. Cooking systems can also include other aspects of the cooking environment (such as ventilation when measuring exposure). This document is applicable to cookstoves used primarily for cooking or water heating in domestic, small-scale enterprise and in institutional applications, typically with firepower less than 20 kW and cooking vessel volume less than 150 l. The provisions of this document are applicable to solar cookers. This document does not cover electric stoves or cookstoves used primarily for space heating. Although some parts of this document can be applicable to electric stoves (usage, usability, safety, durability, cooking power, and household energy consumption), specific considerations required for testing electric stoves are not provided. This document is intended for manufacturers, implementing organizations, researchers, governments, or other entities that need to evaluate cooking system performance in the field.

Fourneaux et foyers de cuisson propres — Méthodes d'essai sur site des fourneaux

General Information

Status
Published
Publication Date
08-Sep-2019
Current Stage
6060 - International Standard published
Start Date
03-Jun-2019
Completion Date
09-Sep-2019
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ISO 19869:2019 - Clean cookstoves and clean cooking solutions -- Field testing methods for cookstoves
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INTERNATIONAL ISO
STANDARD 19869
First edition
2019-09
Clean cookstoves and clean cooking
solutions — Field testing methods for
cookstoves
Fourneaux et foyers de cuisson propres — Méthodes d'essai sur site
des fourneaux
Reference number
ISO 19869:2019(E)
©
ISO 2019

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ISO 19869:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO 19869:2019(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Cooking system . 2
3.2 Adoption . 2
3.3 Fuel consumption . 3
3.4 Emissions . 4
3.5 Safety and durability . 6
4 Symbols, abbreviated terms, and units . 6
5 Field study development .10
5.1 General .10
5.2 Selection of testing strategy .11
5.2.1 General.11
5.2.2 Preliminary assessment .13
5.2.3 Performance assessment .14
5.2.4 Outcomes assessment .14
5.3 Sample selection guidance .17
5.3.1 General.17
5.3.2 Efficacy versus effectiveness .17
5.3.3 Uncontrolled cooking test (UCT) .18
5.3.4 Representative site selection.18
5.4 Selection of representative sampling times .18
5.4.1 Seasonal .19
5.4.2 Events .19
5.4.3 Harvest .19
5.4.4 Weather constraints .19
5.5 Sample size .19
5.6 Field technician capacities .20
5.7 Measurement statistics .20
5.7.1 General.20
5.7.2 Reporting guidelines .20
5.7.3 Mitigating bias and managing uncertainty.20
6 Usage and usability .20
6.1 General .20
6.2 Sample selection and timing .21
6.3 Cookstove usage .21
6.3.1 Usage reporting metrics .21
6.3.2 Usage claims .22
6.3.3 Measurement methods .22
6.4 Cookstove usability .26
7 Fuel measurement .27
7.1 General .27
7.2 Output metrics .27
7.2.1 Specific energy consumption .27
7.2.2 Kitchen energy consumption .28
7.2.3 Comparison between specific energy consumption and kitchen energy
consumption .28
7.2.4 Energy consumed .28
7.2.5 Effective fuel heating value .28
7.2.6 Effective fuel carbon fraction .28
© ISO 2019 – All rights reserved iii

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ISO 19869:2019(E)

7.3 Equipment .28
7.4 Moisture measurement .29
7.4.1 Hand-held moisture meter .29
7.4.2 Oven dry method for wood and other non-wood solid fuels .31
7.5 Fuel heating value measurement .31
7.6 Specific fuel consumption .31
7.6.1 Test conditions.31
7.6.2 Sample selection .31
7.6.3 Measurements .32
7.6.4 Equipment .32
7.6.5 Protocol .32
7.6.6 Calculations .33
7.6.7 Reporting .34
7.7 Kitchen energy consumption measurement .35
7.7.1 Considerations .35
7.7.2 Reporting .35
7.8 Fuel measurements for emissions by carbon balance .36
7.8.1 Test conditions.36
7.8.2 Equipment .36
7.8.3 Required measurements .36
7.8.4 Determination of moisture content .37
7.8.5 Determination of lower heating value .37
7.8.6 Determination of fuel carbon fraction . .37
7.8.7 Protocol .37
7.8.8 Calculations .37
7.8.9 Reporting .39
7.9 Limitations .40
8 Emission measurement .40
8.1 Emission species measured .41
8.2 Emission output metrics .41
8.3 Sample selection .41
8.4 Sampling methods .41
8.5 Emission measurements using partial capture sampling with carbon balance .41
8.5.1 Test conditions.41
8.5.2 Required measurements .42
8.5.3 Equipment specifications .42
8.5.4 Sampling protocol .48
8.5.5 Gravimetric analysis of PM mass .49
2,5
8.5.6 Thermal optical analysis of EC/OC mass .49
8.5.7 Gas sensor calibration .49
8.5.8 Filter blanks .49
8.5.9 Leak testing .49
8.5.10 Flow rate quality control and tolerances .50
8.5.11 Dilution.50
8.5.12 Background concentration measurement .50
8.5.13 Fuel measurements .56
8.5.14 Metric calculations .56
8.6 Reporting .72
9 Power measurement .73
9.1 General .73
9.2 Cooking power .73
9.3 Average firepower .74
9.3.1 Test conditions.74
9.3.2 Required measurements .75
9.3.3 Required equipment .75
9.3.4 Measurement protocol .75
9.3.5 Data analysis and calculations .75
iv © ISO 2019 – All rights reserved

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ISO 19869:2019(E)

9.3.6 Reporting .75
9.3.7 Limitations .76
9.4 Power calculations for solar thermal cookstoves .76
9.4.1 Cooking power .76
9.4.2 Cooking efficiency .76
10 Safety assessment.76
10.1 Context .76
10.2 Purpose .76
10.3 Assumptions .76
10.4 Serious hazards .77
10.5 Training of safety inspectors .78
10.6 Field safety assessment procedure .78
10.6.1 General.78
10.6.2 Background information gathering .78
10.6.3 Household setting risk factors survey .79
10.6.4 Physical checks of cookstove and kitchen safety .79
10.7 Hazard likelihood matrix .84
10.8 Safety assessment report .85
11 Durability assessment .86
11.1 General .86
11.2 Test schedule .86
11.3 Sample size .87
11.3.1 Preliminary assessment sample size .87
11.3.2 Performance assessment sample size .87
11.4 Durability assessment tool outline .87
11.4.1 General information .87
11.4.2 Overall cookstove functionality.88
11.4.3 Cookstove condition .88
11.4.4 Potential reasons for changes in cookstove condition and functionality.88
11.5 Data aggregation and interpretation .89
12 Exposure to airborne pollutants .90
12.1 Area concentration measurements .90
12.1.1 General.90
12.1.2 Measurement of area concentrations .91
12.1.3 Modelled area concentrations .91
12.2 Personal exposure measurements .91
12.2.1 General.91
12.2.2 Measurement of personal exposure concentrations .92
12.2.3 Constructed exposure estimates .92
Annex A (informative) Key concepts and conventions in emission sampling .93
Annex B (informative) Safety assessment questionnaire .98
Annex C (informative) Uncertainty estimates and uncertainty propagation .104
Bibliography .106
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ISO 19869:2019(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
...

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