U.P.B. Sci. Bull., Series D, Vol. 67, Iss. 2, 2014 ISSN 1454-2358 RESEARCH CONCERNING THE MECHANICAL PULVERIZATION CAPACITY OF PURE VEGETABLE OILS USED FOR ENERGETIC PURPOSES Bogdan NICULESCU 1 , Gheorghe LĂZĂROIU 2 The study presents an analysis over the pulverization capacity of crude vegetable oils in energetic installations. The pumped mechanical pulverization has been taken into consideration. Judging by the physical- energetic characteristics of crude vegetable oils, the gauge of pulverization and angle of the jet’s opening have been calculated. The analytic data has been verified on an experimental installation. The research’s findings outline the possibility of the crude vegetable oils’ usage in installations designed for fossil liquids. Keywords: vegetable oils, mechanical pulverization, energetic purposes. 1. Introduction The pure, crude vegetable oil or liquid fuel slightly additive by vegetable oil has a sliminess increased by approximately 20 ÷ 40 % as opposed to the pure fossil one. The experimental research’s role is to confirm the possibility of obtaining an adequate pulverization in classical energetic installations. The tests were carried out in the absence of heat. A drop of liquid’s breakage into finer particles is produced by the modification in the balance of forces which act upon it, according to Laplace’s Law. By increasing the internal pressure i p , the breakage of drops of d in diameter is produced, [1, 2]: ct p p p a s i = + = (1) Where: i p is internal pressure of the liquid; s p is pressure caused by superficial tension; a p is pressure of the surrounding environment. For a spherical surface of radius 2 / d r = the r p s / 2 σ = , where σ represents the superficial tension of the liquid. From the perspective of the principal of functioning, the injectors used in energetics can be classified in, [3, 4]: 1 Ph.D student, Faculty of Power Engineering, University POLITEHNICA of Bucharest, Romania 2 Prof.Ph.D.eing., University POLITEHNICA of Bucharest, e-mail: glazaroiu@yahoo.com