AFIDA is a revolutionary development providing you with a fully automated way of determining Indicated Cetane Number (ICN) of diesel and diesel related fuels. The AFIDA can analyse multiple samples in sequence and selects the samples using the 36-place autosampler. Only a small sample volume of 40 ml is required per test with a short analysis time of approximately 25 minutes.
The analyser uses a Constant Volume Combustion Chamber (CVCC) and incorporates a unique and patented high pressure injection system that generates fine fuel droplets similar to modern common rail injectors in most diesel engines.
An ultra robust temperature controlled piezo electric injector provides rapid switching and highly repeatable fuel metering, offering you improved performance and consistency when compared with solenoid controlled injectors and pintle type nozzles.
Direct correlation to ASTM D613 (ISO 5165) engine tests:
The traditional Cetane Engine methods establish an ignition delay period for the test fuel which is referenced to a primary reference fuel scale.
Existing Constant Volume Combustion Chamber (CVCC) technology provides a Derived Cetane Number (DCN) result based on a historical averaged correlation equation applied to the ignition delay of the fuel sample.
The new generation AFIDA technology is a significant step forward as it uses the same Primary Reference Fuels as specified in the Cetane Engine method to provide a calibrated cetane number measurement.
The AFIDA has multiple integral safety monitoring functions to ensure the system is running safely and accurately.
The AFIDA also has safety functions in place to prevent the system from overheating in the event of a power failure.
Industry stakeholders recognise the advantages of the AFIDA with CEN, ASTM and the Energy Institute forming new working groups to develop test methodology; IP 617 is already published as an approved test method.
Inter-laboratory studies showed outstanding precision and excellent correlation when compared with samples with known Cetane Numbers. The coefficient of determination (R²) is 0.98. An investigation into carryover with 2-EHN Cetane Improver showed no effect.
|CHAMBER TEMPERATURE||580 °C|
|CHAMBER PRESSURE||17.5 bar|
|INJECTION PRESSURE||1000 bar|
|COMPRESSED AIR||20.9 ± 0.5 % O2|
|SAMPLE VOLUME||approx. 40 ml for analysis and cleaning|
|WARM UP TIME||approx. 45 min|
|ANALYSIS TIME||approx. 25 min per sample|
|SIZE (DXHXW)||1300 mm x 800 mm x 600 mm (excluding platform)|
|WEIGHT||160 kg 100 kg (excluding platform)|
|ASTM D975||Standard Specification for Diesel Fuel Oils , biodiesel, biodiesel blend, diesel, fuel oil, petroleum and petroleum products|
|IP 617||Determination of generic cetane number (G-CN) of fuels using a constant volume combustion chamber: primary reference fuels calibration (PRFC) method|
|BS EN 17155||Liquid petroleum products – determination of indicated cetane number (ICN) of middle distillate fuels – primary reference fuels calibration method using a constant volume combustion chamber|
|ASTM D613||Standard Test Method for Cetane Number of Diesel Fuel Oil|
|IP 41||Determination of the ignition quality of diesel fuels — Centane engine method|
|BS EN ISO 5165 & BS 2000-41 & ISO 5165||Determination of the ignition quality of diesel fuels. Cetane engine method|
|ASTM D8183||Determination of Indicated Cetane Number (ICN) of Diesel fuel oils using a Constant Volume Combustion Chamber – reference fuels calibration method|
|ASTM D6751||Standard Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels|
|ASTM D7467||Standard Specification for Diesel Fuel Oil, Biodiesel Blend (B6 to B20)|