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AFIDA
Advanced Fuel Ignition Delay Analyser
Preliminary Information
1 t: +44 (0) 1932 564391 | f: +44 (0) 1932 568363 | e: [email protected] | www.seta-analytics.com
Cetane Number Analysis
2 t: +44 (0) 1932 564391 | f: +44 (0) 1932 568363 | e: [email protected] | www.seta-analytics.com
Cetane Number Analysis
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2020
30
40
50
60
70
80
90
100
ID [ms]
CN
[−]
calibration curvePRF blends
AFIDA (Advanced Fuel Ignition Delay Analyzer)
AFIDA is a revolutionary development providing fully automated
determination of the Cetane Number Constant Volume CN(cv) of
diesel and diesel related fuels. The Analyser incorporates a unique
and patented high pressure injection system that generates fi ne fuel
droplets similar to modern common rail injectors that are currently
applied in the automotive industry.
The Analyser provides very fast, e� cient and calibrated CN
determinations, tests are fully automated via an integral carousel and
auto sampler.
New generation AFIDA technology
Direct correlation to ASTM D613 (ISO 5165) CFR engine tests.
The traditional Cetane ‘CFR’ engine method establishes an ignition
delay period for the test fuel which is measured against primary
reference fuels (PRF’s).
Existing CVCC technology (including IQT and CD510 instruments)
provide a Derived Cetane Number (DCN) result based on a correlation
equation applied to the ignition delay of the fuel sample.
The new generation AFIDA technology is a signifi cant step forward as
it uses the exact same Primary Reference Fuels as specifi ed in the CFR
Engine method to provide a calibrated cetane number measurement.
Initial test programmes have shown excellent correlation between EN
ISO 5165 cetane number and AFIDA cetane number. The coe� cient
of determination (R²) is 0.98 (see fi gures 1 and 2).
30 35 40 45 50 55 60 65 70 75 8030
40
50
60
70
80
CN (EN ISO 5165)
CC
N (A
FID
A)
Figure 1: Example of a calibration with 30 PRF blends covering the whole measurement range
Figure 2: CCN correlation to CFR engine
MPI
TI
Piezo injector
Pressuresensor
Combustion air
Dilution air
Oxygen,Nitrogen,Argon
Exhaust
Exhaust
Optional:exhaust analysis
Fuel samples
Autosampler
Thermostat
High pressure pump
Waste
PIC
TI
TI
PIC
Pressureregulator
Gas mixing unit
PFC
Heating tube
t: +44 (0) 1932 564391 | f: +44 (0) 1932 568363 | e: [email protected] | www.seta-analytics.com 3t: +44 (0) 1932 564391 | f: +44 (0) 1932 568363 | e: [email protected] | www.seta-analytics.com
Cetane Number Analysis
Figure 4: Pressure variation curves of four di� erent fuels (B0, B30, GTL and Jet A1)
Figure 3: CCN variation during operation time
Features:
• Bench top operation
• Fully automated measurement
• Very small sample volumes (approx 40 ml/analysis
including fl ushing)
• Short analysis time of approximately 20 minutes per sample
• Integral 20 place carousel and auto sampler
• Minimum operator time
• Precise and reproducible software-controlled determination
of CN(cv)
• Calibration with industry approved PRFs
• Excellent correlation to EN ISO 5165
• Advanced electronically controlled high pressure fuel
injection system
• Safe operation – integral safety monitoring functions
• Results saved to PC or for download
• Proven calibration stability – minimizing downtime (see fi gure 3)
• Research: variable operating parameters make AFIDA a useful
research tool.
5 10 15 20 25 3049
50
51
52
53
days of operation
CC
N [
−]
Operating sequence:
• Prior to the analysis each sample is fi ltered by the operator using
a 0.45 µm fi lter
• The software-controlled auto sampler selects the sample to
be analyzed
• The whole system is cleaned automatically with the
selected sample
• The high pressure pump generates the injection pressure, while
the heating tube keeps the fuel at a constant temperature
• The nebulized fuel ignites spontaneously and leads to a pressure
increase in the combustion chamber (see fi gure 4)
• The pressure variation curve is recorded highly resolved by a
dynamic pressure sensor
• CN(cv) is calculated by means of a calibration curve using fi ve
primary reference fuel blends (ie: as used by the CFR engine).
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 230
1
2
3
4
5
6
7
8
time [ms]
pres
sure
[bar
]
B0B30GTLJet A1
AFIDA 2805
4
Cetane Number Analysis
t: +44 (0) 1932 564391 | f: +44 (0) 1932 568363 | e: [email protected] | www.seta-analytics.com
Software:
AFIDA is controlled via a PC with user friendly ‘LabView’ operating software. The operating interface permits selection of sampling analysis
sequence. After selecting ‘start’ all sample analysis is fully automatic and needs no user intervention. Measurement conditions and a detailed
report of results are stored in separate text-fi les for each sample. A complete overview of CN results of the test sequence is saved.
Operation:
Measurement conditions: Chamber temperature: 650 °C
Chamber pressure: 10 bar
Injection pressure: 1000 bar
Compressed air (20.9 ± 1.0 % O2)
Sample volume: approx. 40 ml for analysis and cleaning
Warm-up time: approx. 45 min
Analysis time: approx. 20 min per sample
Range for CN(cv): 30 – 75 in standard mode
Reporting:
Software: LabView-based program with text export
Test Parameters: All measurement values are stored in the data fi le
Reports: Detailed report of test results, date and time, operator name and calibration data
Safety Features:
External cooling: Backup power supply and liquid level sensor
Waste: Liquid level sensor
Various: Programmable Logic Controller (PLC)-based
Requirements:
Operating requirements: Ambient Temperature: 10 °C to 35 °C (recommended 15 °C to 25 °C)
Humidity: up to 80 % non-condensing
Size: W x H x D: 1300 mm x 800 mm x 600 mm
Weight: approx. 100 kg (excluding platform)
*Manufactured under licence from ASG Analytik-Service Gesellschaft mbH
Technical Specifi cation