Modelling a throttling device during separation of moisture from gas flow

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.75143

Keywords:

subcritical flow mode, supercritical flow mode, throttle valve, pipeline hydraulic resistance, dew point temperature

Abstract

The need to design a model of a throttling device, which is used in the process of low temperature separation (LTS) of moisture from the gas flow, is predetermined by the necessity to coordinate the modes of functioning of the throttle with the modes of the heat exchanger and the separator that are included in the installation of separation. Proceeding from the task of efficient management of the process of the LTS of moisture from the gas flow, we analyzed a channel of control of the flow of gas under throttling. The peculiarity of managing the process of separation of moisture is in the contradiction between the productivity of the gas flow and the conditions of moisture removal. In order to study the influence of parameters of a throttle on the formation of the modes of passing flow, a distribution of the field of the flow velocities is obtained in the software environment of ANSYS Workbench. Visualization of the flow stream allows analyzing the level of turbulence of the flow under throttling and forecasting the trajectory of moisture droplets formed at throttling. By comparing the data obtained from the experimental installation with the data of numerical calculations, carried out in accordance with well­known mathematical models of the flow under throttling, we conducted the assessment of the adequacy of the description of the object of control. It is shown that the assumption of incompressibility of natural gas when evaluating the rate leads to significant errors. As a result of the identification of the parameters of a throttling device, its simulation was implemented in the environment of MatLab Simulink. Block construction of the model allows performing simulation under conditions of arbitrary nature of the change in the parameters of the process over time. The assessment of the adequacy of simulating a throttle device allows using the studied model for constructing a model of an installation of moisture separation from gas flow. 

Author Biographies

Georgіy Kulinchenko, Sumy State University Rimsky-Korsakov str., 2, Sumy, Ukraine, 40007

Associate professor, PhD

Department of Computer Science

Section computerized control systems

Petro Leontiev, Sumy State University Rimsky-Korsakov str., 2, Sumy, Ukraine, 40007

Department of Computer Science

Section computerized control systems

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Published

2016-08-24

How to Cite

Kulinchenko, G., & Leontiev, P. (2016). Modelling a throttling device during separation of moisture from gas flow. Eastern-European Journal of Enterprise Technologies, 4(7(82), 23–29. https://doi.org/10.15587/1729-4061.2016.75143

Issue

Vol. 4 No. 7(82) (2016): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2016 Georgіy Kulіnchenko, Petro Leontiev

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