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- Title
Determination of energy losses on switchgears of pneumatic transport of meat products.
- Authors
Beseda, Sergei; Litovchenko, Igor
- Abstract
Introduction. Researches of various variants of connection of pipelines for transportation of food intermediate products are carried out. The purpose of the study is to determine energy losses depending on the geometric parameters of the connection. Materials and methods. Computer simulation was used as a research tool. The software CAE complex FlowVision uses the finite element method to predict the movement of viscous liquids in the case of a drop in air pressure at the entrance and exit from the geometric model. Results and Discussion. The combination of structures allows to determine their resistance to the motion of the product to select the optimal branching method, as well as to obtain a comparative characteristic of the local resistance, depending on the angle of rotation. In our case, the angles of rotation are significant: option 2 - 45°, option 1 - 30°, option 4 - 22,5°, option 3 - 15°. At another position of the valve, when the movement of the product is straightforward, energy losses practically do not occur. The novelty of the used method of computer modeling for this work is to determine the values of the dissipation of the kinetic energy of the moving product. In the course of research, the method of visualization - "isolines" - was used, which allows a clear definition of the limits of gradation of values. When calculating the area occupying one or another range of values of isolines of energy dissipation, it is possible to compare the intensity of energy losses if they are attributed to the total area of branching. If you evaluate the area that is limited by isolines of a certain intensity of the factor, you can obtain an integral characteristic of the action of dynamic parameters. Significant areas, which are limited by large values of dissipation, show the origin of turbulence, which is the main source of loss of transporting pressure. The mathematical processing of each curve gives the best description of the behavior of graphs when using polynomials of the third degree. Conclusions. When designing the piping laying options, you can combine straight sections, pipe turns, switches in such a way as to minimize pressure loss. That is, it is expedient to use symmetrical branching variants and minor turns of pipes even in simple areas (depending on their length).
- Subjects
ENERGY dissipation; MEAT; FOOD transportation; PIPING; ENERGY intensity (Economics)
- Publication
Ukrainian Journal of Food Science, 2018, Vol 6, Issue 1, p95
- ISSN
2310-1008
- Publication type
Article
- DOI
10.24263/2310-1008-2018-6-1-12