oSIST prEN ISO 17507-1:2024

Natural gas - Calculation of methane number of gaseous fuels for reciprocating internal combustion engines - Part 1: MNc method (ISO/DIS 17507-1:2024)

Part 1 of ISO 17507 describes the calculation method for the methane number of a gaseous fuel according to the methodology first proposed Deutz (“Klöckner-Humboldt-Deutz AG”) and later amended by MWM (“Motoren-Werke Mannheim AG”).

Erdgas-Berechnung der Methanzahl von gasförmigen Kraftstoffen für Verbrennungsmotoren-Teil 1: MNc-Verfahren (ISO/DIS 17507-1:2024)

Gaz naturel - Calcul de l'indice de méthane des combustibles gazeux pour les moteurs alternatifs à combustion interne - Partie 1: Méthode IMc (ISO/DIS 17507-1:2024)

[Not translated]

General Information

• Status: Not Published
• Public Enquiry End Date: 02-Jan-2025
• ICS: 75.060 - Natural gas
• Technical Committee: DPL - Gas supply
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 07-Nov-2024
• Due Date: 27-Mar-2025
• Ref Project: prEN ISO 17507-1 - Natural gas - Calculation of methane number of gaseous fuels for reciprocating internal combustion engines - Part 1: MNc method (ISO/DIS 17507-1:2024)

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2024
[Not translated]
Natural gas - Calculation of methane number of gaseous fuels for reciprocating internal
combustion engines - Part 1: MNc method (ISO/DIS 17507-1:2024)
Erdgas-Berechnung der Methanzahl von gasförmigen Kraftstoffen für
Verbrennungsmotoren-Teil 1: MNc-Verfahren (ISO/DIS 17507-1:2024)
Gaz naturel - Calcul de l'indice de méthane des combustibles gazeux pour les moteurs
alternatifs à combustion interne - Partie 1: Méthode IMc (ISO/DIS 17507-1:2024)
Ta slovenski standard je istoveten z: prEN ISO 17507-1
ICS:
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 17507-1
ISO/TC 193
Natural gas — Calculation of
Secretariat: NEN
methane number of gaseous
Voting begins on:
fuels for reciprocating internal
2024-10-17
combustion engines —
Voting terminates on:
2025-01-09
Part 1:
MNc method
ICS: 75.060
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
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This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 17507-1:2024(en)
DRAFT
ISO/DIS 17507-1:2024(en)
International
Standard
ISO/DIS 17507-1
ISO/TC 193
Natural gas — Calculation of
Secretariat: NEN
methane number of gaseous
Voting begins on:
fuels for reciprocating internal
combustion engines —
Voting terminates on:
Part 1:
MNc method
ICS: 75.060
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
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NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
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Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 17507-1:2024(en)
ii
ISO/DIS 17507-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 2
5 MNc method . . 2
5.1 Introduction .2
5.2 Applicability .2
5.2.1 Standard gaseous fuel composition range .2
5.2.2 Handling of other gaseous fuel components .3
5.3 Methodology to calculate the MNc .3
5.4 Expression of results . .4
5.5 Uncertainty error and bias .4
6 Example calculations . 4
6.1 Example 1 .4
6.1.1 Simplification of the composition of the gaseous fuel . .4
6.1.2 Selection of the ternary systems .5
6.1.3 Sub-division of the inert-free mixture into the selected partial mixtures .8
6.1.4 Calculation of the methane number of the partial mixtures .8
6.1.5 Criteria for not using ternary systems for final calculation of the MNc .8
6.1.6 Adjustment of the composition and fraction of the partial mixtures .8
6.1.7 Calculation of the methane number of the simplified mixture.9
6.1.8 Calculation of the methane number of the gaseous fuel .10
6.2 Example 2 .10
6.2.1 Simplification of the composition of the gaseous fuel . .10
6.2.2 Calculation of fitness of the ternary systems .10
6.2.3 Selection of ternary mixtures.10
6.2.4 Calculation of the methane number .11
6.3 Example 3 .11
6.3.1 Simplification of the composition of the gaseous fuel . .11
6.3.2 Calculation of fitness of the ternary systems .11
6.3.3 Selection of ternary mixtures.11
6.3.4 Calculation of the methane number . 12
6.3.5 Additional numerical examples . 12
Annex A (normative) Numerical results of calculations for a variety of compositions for
software validation purposes .13
Annex B (informative) Tools for users of the MNc Method .27
Annex C (normative) Uncertainty error and bias .28
Annex D (informative) Natural gas-based fuels for reciprocating internal combustion engines .30
Annex E (informative) Basis of the MNc Method .31
Bibliography .36

iii
ISO/DIS 17507-1:2024(en)
Foreword
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iv
ISO/DIS 17507-1:2024(en)
Introduction
The globalization of the natural gas market and the drive towards sustainability are increasing the diversity
of the supply of gases to the natural gas infrastructure. For example, the introduction of regasified LNG
can result in higher fractions of non-methane hydrocarbons in the natural gas grid than the traditionally
distributed pipeline gases for which these hydrocarbons have been removed during processing. Also, the
drive towards the introduction of sustainable gaseous fuels such as hydrogen and gases derived from
biomass results in the introduction of “new
...