Life Science Journal 2015;12(1s) http://www.lifesciencesite.com http://www.lifesciencesite.com lifesciencej@gmail.com 9 Heat transfer intensifiers efficiency research by numerical methods Rinat Shaukatovich Misbakhov 1 , Nikolai Ivanovich Moskalenko 1 , Victor Mihaylovich Gureev 2 , Andrey Mihaylovich Ermakov 2 1 Federal State State-subsidized Educational Instution of Higher Professional Education «Kazan State Power Engineering University», Krasnoselskaya st., 51, Kazan, 420066, Russia 2 Federal State Government-Funded Educational Institution of Higher Professional Education Kazan National Research Technical University named after A.N. Tupolev, Marx st., 10, Kazan, 420111, Russia Abstract. The article presents the results of numerical modeling studies of shell-and-tube heat exchanger with helical, dimple, ring and semiring recesses. We have obtained graphic value dependences of heat transfer coefficients, heat flow, flow structure and pressure loss of the heater in the pipes and annulus of the heat exchanger. Conclusions on the application have been made on various types of intensifiers at different flow of the heater in the shell-and-tube heat exchanger unit. [Misbakhov R.S., Moskalenko N.I., Gureev V.M., Ermakov A.M. Heat transfer intensifiers efficiency research by numerical methods. Life Sci J 2015;12(1s):9-14] (ISSN:1097-8135). http://www.lifesciencesite.com. 3 Keywords: intensifier, heat exchange, modeling, heat transfer, flow structure Introduction Enhancement of heat transfer allows more compact heat exchangers or exchangers of more power in the same dimensions, but in the modernization of modern heat exchangers we need to consider the shape and size of intensifiers, as well as the heater flow regimes. Today, application of various intensifiers is widespread, they are used under certain conditions and the heater flow regimes. With the enhancement of heat transfer in shell-and- tube heat exchangers, rounded recesses of various types are used: ring, helical, dimple, etc. Rectangular recesses are used much less frequently, in consequence of a larger hydraulic resistance [1]. The aim of this work is a numerical study of the effect of different heat transfer intensifiers in shell-and-tube heat exchangers, revealing the laws of the various intensifiers depending on flow regimes. According to the analysis of works by Olimpiev V.V., Kalinin E.K., Dreizer G.A., Gortyshov Y.F. and Popov I.A. [2-13], the optimum size have been chosen for the ring, and helical recesses, as well as developed a new type of intensifiers – semiring. Basic dimensions of the test semiring intensifiers are presented in Figure 1, the ring enhancers are in Fig. 2, dimple recesses are in Fig. 3 and helical recesses are in Fig. 4. Fig. 1. Semiring intensifiers dimensions Fig. 2. Ring enhancers dimensions Fig. 3. Dimple intensifiers dimensions Fig. 4. Helical intensifiers dimensions Application of numerical modeling of heat transfer and hydrodynamics processes is selected in order to reduce the cost of research, since the physical experiments are significantly more