Consideration of shear deformation in the calculation of bent structural elements Inomjon Khamzaev, Elmurad Umarov, Ozodakhon Khaydarova, Jalolidin Muminov, Bobojon Ortiqaliyev EPJ Web of Conferences, 2025 The article studies the effect of experimental stresses on the deformation of structural elements subject to bending. It is known that the bending element of the structure is a beam, the main problem is to check their uniformity, for this it is necessary to determine the displacements caused by external forces, this task is carried out on the basis of integrating the main differential equation of the bent axis of the beam. But in general, the bending of the beam is significantly affected by tensile stresses arising on the surfaces of its cross section. Shear deformation caused by these stresses can in some cases significantly affect the deformation of the beam, that is, its composure. It is known that when deriving the main differential equation of the bent axis of the beam, only the effect of the bending moment is taken into account. In this case, the axis of the beam is curved, there is a stretching of the longitudinal layers from the neutral on one side and compression on the other. It is based on the hypothesis that the cross sections of the beam are straight, and the straight sections remain perpendicular to its bent axis. The article derives a differential equation for a curved beam axis taking into account the influence of shear deformation.
Increasing the efficiency of heat exchange by improving the design of heat exchangers Abdugaffor M. Khurmamatov, Oybek Y. Ismailov, Alisher U. Auesbaev, Ganisher B. Rakhimov, Jalolidin A. Muminov, et al. Nafta Gaz, 2025 This article is focused on the investigation and optimization of heat exchange efficiency in a shell-and-tube heat exchanger used for heating a saturated absorbent with regenerated absorbent in the technology of purifying regeneration gas from acidic components through absorption. The optimization of heat exchange efficiency involves modifying the hydrodynamic regimes of the heat exchanger by adjusting the properties of working fluids inside the tubes and the inter-tube space. The study aims to enhance heat exchange by inducing turbulent flows inside and between the tubes. The authors examined the impact of centrifugal force on flow dynamics to improve distribution uniformity within the distribution chamber. To achieve this, a strategic reorientation of the raw material inlet nozzle in a horizontal shell-and-tube heat exchanger with a one-sided influence on the distribution chamber is proposed. Throughout the research, experiments were conducted, and heat exchange parameters were examined including flow velocity, temperature differentials, and heat transfer coefficients. The results allowed for the determination of optimal parameters to enhance heat exchange efficiency in the specific heat exchanger. This work represents a significant contribution to the heat exchange technology and can be applied to optimize processes in the oil and gas and chemical industries, as well as other sectors utilizing shell-and-tube heat exchangers. The findings advance the understanding of heat exchange mechanisms and provide practical insights for improving efficiency in various industrial applications.
Optimization of the process of heating an oil and gas condensate mixture by light naphtha vapor in heat – exchanger condenser 10E04 Fozilbek F. Shomansurov, Alisher U. Auesbaev, Oybek Y. Ismailov, Abdugaffor M. Khurmamatov, Zamirbek M. Khametov, et al. Nafta Gaz, 2024 The constant growth in the cost of energy carriers leads to finding the ways to reduce production costs and efficient use of energy resources by optimizing the technological regimes of oil refineries. Based on the current state of the resource base and the country's growing needs for oil and gas resources, the introduction of modern technologies for maintaining and intensifying the production and processing of oil and gas, the priority is to increase the energy efficiency of the fuel and energy complex. In this aspect, scientific research aimed at the efficient use of the heat of process flows in the stage of thermal preparation of local hydrocarbon raw materials for distillation, the development of new, energy and resource-saving technologies for the production of petroleum products, the optimization of the technological regimes of oil refineries in order to increase their thermal efficiency and reduce the cost of manufacture of petroleum products, the synthesis of technological schemes with a rational number of apparatus for the thermal preparation of raw materials for distillation is of great importance. Based on this, a mathematical model has been developed for the process of thermal preparation of an oil and gas condensate mixture for distillation, which makes it possible to determine the energetically optimal heat exchange surface of the apparatus. Аs a system of equations, the objective function of the optimality criterion is formulated – the specific technological prime cost of the heated oil and gas condensate mixture, which includes changes in the power consumption for its pumping and depreciation deductions for heat exchange equipment depending on parameters the process. On the grounds of investigation of the influence of technological parameters – temperature, composition, and consumption of raw materials in the pipe, as well as steam pressure in the annulus on the efficiency of heat transfer in an industrial heat exchanger, the optimal operating conditions for the heat exchanger 10E-04 at the Bukhara Oil Refinery have been identified: Finter = 219 m2, Cp = 0.010825 USD/kg, A = 0.010825 USD/kg, Cst = 0.02165 USD/kg, and t = 107.3°C, with a specified throughput of Grm = 105 508.3 kg/h.
The optimal shape of the nozzle for drying food grains A A Akhunbaev, M A Khusanboev, J A Muminov, G Sh Khasanova, A A Khakimov, et al. Iop Conference Series Earth and Environmental Science, 2024 This article analyzes the optimal shape of a two-segment nozzle of a drum machine for drying food grains. The loading and unloading of the nozzle at any angle between the nozzle segments are investigated using a geometric model. Equations were proposed for the maximum volume carried by the nozzle, the maximum angle of incidence and the average height of the material drop.
Research Results of the Process of Cooling the Gasoline Fraction with Dry and Wet Air A.M. Khurmamatov, J.A. Muminov E3s Web of Conferences, 2023 The article presents the results and conclusions of experiments on the effect of dry and wet air on the cooling efficiency in an air cooler in order to improve the processes of cooling gasoline fractions at oil and gas processing enterprises.
