Diesel effect

If oil is pressurized by compressed air, an explosive hazard exists. If high-pressure air encounters the oil, it may create a diesel effect, which may result in an explosion. A carefully followed preventive maintenance plan is the best precaution against explosions. 

EIA, The Transition to Ultra-low Sulfur Diesel Effects on Process and Supply, May 2001. 

Granados-Aguilar AS, Viveros-Garcla T, Perez-Cisneros ES (2008) Thermodynamic analysis of a reactive distillation process for deep hydrodesulfurization of diesel effect of the solvent and operating conditions. Chem Eng J 143 210-219... 

Troubleshooting - Problems and Solutions 143 5.2.4 Burnt Marks (Diesel Effect)... 

Problems and Troubleshooting - Injection Molding Flow chart 5.2.4 - Burnt marks (Diesel effect)... 

Flow chart 5.2.4 illustrates the schematic approach to solve the problem of burnt marks, also known as diesel effect. Overstay of the material in the barrel leads to the burnt marks. Machine size has to be considered to resolve the problem. There is a possibility of a vent getting clogged. Improve venting and in some cases the vent may be deepened. Increase in gate size may also be required in some cases. 

If the filling speed is high, the air must be removed from the cavity sufficiently quickly. If this is not the case, the compression, and thus the heating of the air increases (Diesel effect, see Chapter 9). This can lead to heat damage of the material, or can even cause bums. So care should be taken to ensure that the air removal system in the parts of the mould filled last works well. Under certain circumstances, it is sufficient to reduce the mould elamping force to the necessary level, if the air can be extracted through the parting plane. 

Figure 9.20 Sheet with diesel effect (filling pattern)...

Figure 9.21 Diesel effect (bums) due to merging of several flow fronts with entrapped air at the...

Note Incomplete filling due to venting problems does not necessarily cause the diesel effect (Section 9.2.8). Therefore the cause for the defect is often hard to determine. 

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