External removable elements of pipes for heat transfer enhancement (Design overview)

Abstract

The subject of the study is the external removable means of heat exchange pipes for intensifying the heat exchange process in technological equipment and pipelines of various sectors of the economy. Studies of the state of art and prospects of constructive and technological design of external removable elements of pipes for heat transfer intensification are based on a critical analysis of scientific and technical sources of information and, above all, patent information from the leading countries of the world, since it is in the patent documentation that information is provided on innovative developments in the relevant field of technology and technology. With the help of methods of analysis and synthesis, external removable elements of pipes for the intensification of heat transfer of equipment and pipelines in the chemical and related branches of technology are systematized. For each type of elements, a detailed classification has been developed, on the basis of which the most interesting designs proposed by scientists, designers and inventors of the leading countries of the world are considered. A critical assessment is given to most of the elements, an analysis of their advantages and disadvantages is made. Preference is given to sources of information from the end of the second and beginning of the third millennium. The designs of these elements are analyzed depending on the regime of the fluid coolant, the presence of a change in the state of aggregation of the coolant, the nature of the effect on the flow over time, the nature of the change in the flow hydrodynamics, the degree of change in the flow hydrodynamics, the relative length, the orientation of the pipes in space, the degree of the channel curvature, the material, the degree of assembly , the degree of mobility of the components, the number of covered pipes, as well as the type of blank. It is shown that, despite a significant variety of designs of external removable elements of pipes for heat transfer intensification, metal plate elements tested in manufacture and operation remain the most in demand by the industry. However, due to the advances in materials science and computer modeling, the search for new designs of pipe elements to intensify heat transfer continues.