BS EN 16715:2015
$142.49
Liquid petroleum products. Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels. Ignition delay and combustion delay determination using a constant volume combustion chamber with direct fuel injection
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 28 |
WARNING The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This European Standard specifies a test method for the quantitative determination of ignition and combustion delays of middle distillate fuels intended for use in compression ignition engines. The method utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the product under test. An equation is given to calculate the derived cetane number (DCN) from the ignition and combustion delays determined from the dynamic pressure curve. This standard is applicable to middle distillate fuels, fatty acid methyl esters (FAME) and blends of diesel fuels and FAME .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. However, users applying this standard 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. This standard covers the ignition delay range from 2,47 ms to 4,09 ms and combustion delay from 3,71 ms to 6,74 ms (67 DCN to 39 DCN). NOTE 1 The combustion analyser can measure shorter or longer ignition and combustion delays, but precision is not known. NOTE 2 There is no information about how DCNs outside the 67 to 39 range compares to EN ISO 5165. NOTE 3 For the purpose of this European Standard, the expression (% (V/V)) is used to represent the volume fraction (?), and (% (m/m)) the mass fraction (?).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | European foreword |
| 6 | Introduction |
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions |
| 9 | 4 Principle 5 Reagents and materials |
| 10 | 6 Apparatus 7 Sampling |
| 11 | Figure 1 — Schematic overview of combustion analyser |
| 12 | 8 Apparatus assembly and installation 9 Preparation of apparatus 9.1 System start-up and warm-up 9.2 Standard operating and test conditions Table 1 — Standard operating test conditions |
| 13 | 10 Calibration, verification and quality control 10.1 General 10.2 Calibration |
| 14 | Table 2 — Limits for calibration and Apparatus verification 10.3 Apparatus verification 10.4 Quality control (QC) |
| 15 | 11 Test procedure 12 Calculation 13 Expression of results |
| 16 | 14 Precision 14.1 General 14.2 Repeatability 14.3 Reproducibility Table 3 — Precision values Table 4 — Calculated precision values for information |
| 17 | 15 Test report |
| 18 | Annex A (normative) Combustion analyser description A.1 General A.2 Apparatus description and assembly |
| 19 | Table A.1 — Injection volume vs. injection time |
| 20 | A.3 Control and data acquisition |
| 21 | Annex B (normative) Operational details in support to the standard test procedure B.1 General B.2 Cleaning procedure to prepare fuel system for calibration B.3 Automatic calibration procedure |
| 22 | B.4 Test sequence |
| 23 | Figure B.1 — Typical signal output of Injector and pressure sensor for a single combustion cycle |
| 24 | B.5 Unit shutdown |
| 25 | Bibliography |
