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Information × Registration Number 0223U004971, 0121U111714 , R & D reports Title Modeling the peculiarities of the operation of main pipelines in modes different from the design popup.stage_title Head Kolohryvov Mykhailo M., к.т.н. Registration Date 11-12-2023 Organization Odesa National Academy of Food Technologies popup.description2  Conducted studies of the influence of ambient air temperature on the process of changing thermodynamic parameters and thermophysical characteristics of natural gas pumped through an underground pipeline established the presence of a place of inversion of heat exchange between gas and soil - a change in the direction of heat exchange along the length of the gas pipeline. It has been proven that the air temperature above the soil surface should be substituted into the formula for calculating the change in gas temperature along the length of the pipeline between compressor stations. Thanks to this, it became possible to determine the quantitative changes in the thermophysical and hydraulic characteristics of the gas flow along the length of the pipe, in particular, changes in density, viscosity, heat capacity, and flow regimes. Knowledge of thermophysical properties made it possible to model the current change in the coefficient of hydraulic resistance along the length of the pipeline section. Analytical studies made it possible to develop practical recommendations for energy-saving operation of air cooling devices at compressor stations of main gas pipelines. It was determined that the optimal gas temperature at the outlet of air cooling devices will be the temperature at which the point of inversion of heat exchange along the length of the gas pipeline coincides with the location of the next compressor station. It is shown how it is possible to regulate gas cooling in air cooling devices - its temperature at the entrance to the main gas pipeline. In particular, it is established by turning off one of several working air cooling devices and changing the number of revolutions of the electric motor in the fan drive of the air cooling device. Key words: underground gas pipeline, temperature, ambient air, air cooling device, energy costs. Product Description popup.authors Buzovskyi Vitalii Petrovych popup.nrat_date 2023-12-11 Close