Biodiesel quality conservation as a result of improving the technique of fuel preservation
Steel overland horizontal reservoirs deteriorate fuel quality as every “inhale” of fuel is accompanied by moist air. Moisture is condensed on the cool walls of the reservoir causing fuel watering. It leads to the dangerous accumulation of electrostatical charges. The development of biodiesel conservation technique is considered an actual and burning problem of today. The hypothesis of temperature stratification of gas flow in whirl tubes which is based on the modification of A.P. Merkulov's hypothesis of interaction of whirlwinds has been suggested. The hypothesis implies micro-cooling cycles made by a big whirlwind structure to be a mechanism of heat transmission. The system of mathematical models equations of the whirl tube processes in three-dimension performance has been developed and solved. Calculation results testified the existence of radial temperature fields which prove the possibility of heat exchange and emergence of temperature stratification. Experimental investigation results of air flow processes in whirl tubes were compared to the results of numerical modelling and testified the adequacy of the model within the accuracy of ± 5% regarding relative values of integral temperatures. Convergence of radial temperature field parameters is not worse than ± 1% in absolute values. A “Neironnaia set'” programme has been developed. The building and application of neuron net models together with the offered methodologies can help to stabilize and control any production technology as well as biodiesel preservation durability. The obtained models, principles and programming means can be used both to develop a new technology of obtaining biodiesel and to optimize and control quality of the product produced by existing technologies. The economic effect of the improved technique of biodiesel preservation made 179500 roubles.