Today, heat transfer processes are present in almost all technological processes of various industries. In heat exchange processes, shell-and-tube heat exchangers are quite effective and easy to manufacture, as the long-term practice of using these devices has shown. Therefore, intensification of heat transfer processes, improvement and development of appropriate equipment is a very urgent task. The object of research is a heat-exchange element with special finning on heat-exchange tubes. The subject of research is the heat transfer processes implemented in a heat exchange element with special finning. The aim of the study is to determine the efficiency of heat transfer of the finned surface of the heat exchange element under conditions of forced convection and to evaluate its efficiency by means of experimental and computer research. This article presents a computer simulation that allows to adequately assess the efficiency of using various designs of finning elements of heat exchange equipment. This is confirmed by the convergence of the experimental data and the results of computer simulation (the discrepancy between the results of the experiment and computer simulation does not exceed 5 %). Experimental and computer studies have shown that the proposed technical solution is more effective than standard ones and can be used in the design of new equipment or improvement of the existing one.

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The paper presents an analysis of the impact of the enterprise on the state of the soil layer. The impact was considered as a complex of separate physical and physico-chemical processes. To do this, we used the method of determining the cleaning efficiency indicators developed by the author, which is based on a simulation experiment. The algorithm for conducting a simulation experiment on a set of models was used, taking into account the established coefficients, and 10,000 of its implementations were carried out. As a result of using the simulation experiment, the values that allow judging the quality of geofiltration have been determined. The risk of contaminant penetration into groundwater through the soil layer was analyzed based on the Harrington desirability scale. The obtained results that contain the dependence of the probability of complete cleaning of the pollutant with depth. During the passage of the filtration flow at a depth of 2.5 m, the maximum probability of complete purification for copper is reached, equal to ����=0.6086.

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