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BS EN 15195:2023

BS EN 15195:2023

$142.49

Liquid petroleum products. Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels by combustion in a constant volume chamber

Published By Publication Date Number of Pages
BSI 2023 30
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This document specifies a test method for the quantitative determination of ignition delay of middle distillate fuels intended for use in compression ignition engines. The method utilizes a constant volume combustion chamber designed for operation by compression ignition, and employing direct injection of fuel into compressed air that is controlled to a specified pressure and temperature. An equation is given to calculate the derived cetane number (DCN) from the ignition delay measurement. This document covers the ignition delay range from 2,58 ms to 6,34 ms (76,8 DCN to 33,9 DCN). The combustion analyser can measure shorter or longer ignition delays, but precision is not known. This document is applicable to diesel fuels, including those containing fatty acid methyl esters (FAME) up to 30 % (V/V). The method is also applicable to middle distillate fuels of non-petroleum origin, oil-sands based fuels, blends of fuel containing biodiesel material, diesel fuel oils containing cetane number improver additives and low-sulfur diesel fuel oils. Furthermore, the method is applicable to paraffinic diesel from synthesis or hydrotreatment, containing up to a volume fraction of 7 % FAME [1]. However, users applying this document especially to unconventional distillate fuels are warned that the relationship between derived cetane number and combustion behaviour in real engines is not yet fully understood. The test method is also applicable to the quantitative determination of the ignition characteristics of FAME, especially the ignition delay. However, analysis of the data available, regarding correlation with EN ISO 5165, is inconclusive. So the determination of derived cetane number for FAME fuel, also known as B100, has not been included in the precision determination as in Clause 12. NOTE For the purpose of this document, the expression “% (V/V)” is used to represent the volume fraction and “% (m/m)” the mass fraction. WARNING — The use of this document may involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
10 4 Principle
5 Reagents and materials
11 6 Apparatus
12 7 Sampling
13 8 Apparatus assembly and installation
9 Preparation of apparatus
9.1 System start-up and warm-up
9.2 Standard operating and test conditions
15 10 Calibration, verification and quality control
10.1 General
10.2 Calibration
10.3 Apparatus verification
16 10.4 Quality control (QC)
11 Test procedure
17 12 Calculation
13 Expression of results
14 Precision
14.1 General
14.2 Repeatability, r
18 14.3 Reproducibility, R
19 15 Test report
20 Annex A (normative)Test apparatus description
A.1 General
A.2 Apparatus description and assembly
21 A.3 Utilities
22 A.4 Control and data acquisition
A.5 Auxiliary apparatus
23 Annex B (normative)Operational details in support to the standard test procedure
B.1 Fuel injection system flushing
24 B.2 Fuel injection system filling and purging
B.3 Test sequence
B.3.1 General
25 B.3.2 Test sequence
26 B.3.3 Data record
B.4 Fuel injection system cleaning
27 B.5 Alternative fuel injection system cleaning
28 Annex C (informative)Apparatus maintenance
C.1 General
C.2 Daily maintenance
C.3 Weekly maintenance
C.4 Yearly maintenance

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BS EN 15195:2023
$142.49