OPTIMIZATION OF PARAMETERS OF FAN UNITS OF AIR COOLING DEVICES

Purpose of the study. Optimization of the parameters of high speed fan units of air coolers, the combination of which achieves the highest economic efficiency of fan units and, accordingly, the most rational range of specific speed values for the modes of maximum efficiency of fan units in combination with the relative diameter of the sleeve. Development of a mathematical model for determining the local values of the parameters of the efficiency of highspeed fan installations. Sustainable development of territories with active subsoil use is closely related to solving the problems of improving industrial safety and the efficiency of cooling the compressed gas at compressor stations of main gas pipelines, which actualizes the problem of mathematical modeling of energy conversion processes in the impellers of fan units of gas air coolers (AVO) to increase the competitiveness of the oil and gas complex RF in the context of globalization. Research methods. To optimize and determine the limiting combination of calculated parameters, the mathematical method of searching for the area of local maxima of a multiparameter problem in this part was performed in two stages: a mathematical model was built for determining the local values of the parameters that ensure the highest efficiency of fan installations with high speed; the most rational limiting combination of design parameters was determined, at which the highest economic efficiency of fan installations is achieved. Research results. The possibility of increasing the economic efficiency of axial fan units of high speed, made according to aerodynamic schemes with one impeller for gas air cooling devices, has been established. Using the mathematical analysis of the basic laws of axial turbomachines, equations for the efficiency of a fan unit and a fan are obtained, depending on the specific speed. Formulas are obtained for the maximum values of the efficiency of the fan and the fan unit of various specific speed depending on the coefficient of the consumpconsumption speed and on the relative diameter of the impeller sleeve. A method is proposed for constructing aerodynamic schemes of axial fan units for air-cooled gas coolers of the "K" type with maximum maximum values of efficiency for given values of specific speed, relative diameter of the impeller sleeve, aerodynamic quality of the impeller profiles, coefficient of aerodynamic resistance of the flow path of the coefficient of flow velocity. The possibility of creating a fan installation with a speed of ny ≥ 400 with an efficiency of at least ηy=0,86. Application area. Enterprises of the oil and gas complex of the Russian Federation for cooling compressed gas using AVO compressor stations of main gas pipelines.

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IMPROVING THE EFFICIENCY OF THE FUNCTIONING OF GAS PIPELINES, TAKING INTO ACCOUNT THE STRUCTURAL FEATURES OF GAS FLOWS

NEWS of National Academy of Sciences of the Republic of Kazakhstan ◽

10.32014/2021.2518-170x.59 ◽

2021 ◽

Vol 447 (3) ◽

pp. 34-39

Author(s):

Elman Kh. Iskandarov

Keyword(s):

High Speed ◽

Gas Flow ◽

Structural Changes ◽

Oil And Gas ◽

Structural Features ◽

Transportation Systems ◽

Gas Condensate ◽

Gas Flows ◽

Gas Pipelines ◽

Processing Depth

The multi-phase and different composition of gas flows during the development of offshore oil and gas-condensate fields leads to high costs of energy in the system of in-field storage and transportation of well products. The analysis of the existing storage and transportation systems of gas-condensate mixtures shows that the geophysical nature and complexity of the internal structure of the transported fluids must be taken into account when choosing the mode parameters and calculation schemes of the pipelines. High-speed gas lines can be operated in a so-called "dry" mode, in which the liquid is carried along with the gas, the pipeline profile is relatively straight, without ups and downs. In this case, the formation of so-called "stagnant zones" in the pipeline is excluded. However, if the processing depth of the gas does not allow it to be transported in a single-phase state, then the condensing gas factor manifests itself. The hydraulic characteristics of vertical ups and downs on offshore pipelines are complicated, and pipelines are often filled with water and condensate. As a result, the pressure in the pipeline increases and the location of the collection point for condensing gases away from the production site can cause major problems. If we characterize oil and gas-condensate flows as a dynamic system in which alternating structural changes take place, the question of whether these systems are fractal is of great scientific interest. Based on the change in the fractal value, it is possible to diagnose structural changes during the transportation of various systems, including condensing gases in the pipelines. In this article the modes of change of basic parameters of a gas flow (pressure, flow rate and temperature) on various lines of a gas pipeline for the purpose of the producing of diagnostic criterion for revealing of liquid inclusions as a part of transported gas are investigated in this article. It is established, that in the presence of liquid inclusions at movement of gas flows there are the structural changes peculiar to fluid systems, systems which can be identified by variations of fractal dimensions of flowcharacteristics. Studies have shown that the study of the dynamics of structural changes in gas flows can play a role in diagnosing the formation of liquid phase embryos in gas pipelines. For this purpose, diagnostics for the movement of gas streams accompanied by liquid deposits in the pipelines has been proposed.

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To Comply: Why Should I?

4th International Pipeline Conference, Parts A and B ◽

10.1115/ipc2002-27162 ◽

2002 ◽

Author(s):

Chantal Robert ◽

Nadia Be´langer

Keyword(s):

Natural Gas ◽

Economic Efficiency ◽

Public Interest ◽

Regulatory Agency ◽

Oil And Gas ◽

Formal System ◽

Power Lines ◽

Gas Pipelines ◽

Oil And Gas Pipelines ◽

Oil Gas

The National Energy Board (NEB) is a Canadian federal regulatory agency whose mandate under the NEB Act is to regulate the construction and operation of interprovincial and international oil, gas and commodity pipelines; the construction and operation of international and designated interprovincial power lines; the setting of tolls and tariffs for oil and gas pipelines under its jurisdiction; the export of oil, natural gas and electricity, and the import of natural gas. International and interprovincial pipelines are subject to the statutory requirements of the NEB Act and Regulations made by the NEB. The regulations typically incorporate consensus standards such as the Canadian Standards Association (CSA Z662 - Oil and Gas Pipeline Systems). The NEB tracks and monitors compliance to ensure that companies fulfill the requirements of the Act and Regulations as well as any conditions imposed at the time of approval of the facilities. In carrying out its mandate, the NEB promotes the safety of people, the protection of property and the environment, and economic efficiency in the Canadian public interest. Recently, the NEB has implemented a formal system to track and monitor compliance. In approving new projects, the NEB imposes conditions outlined in approval Orders and Certificates. It then tracks these conditions for compliance, completeness and effectiveness. The compliance information is gathered mainly from activities such as inspections, audits and company filings. This paper explores in greater detail the NEB’s role in terms of tracking and monitoring compliance, NEB expectations of regulated companies and the effectiveness of a self-reporting condition. It also discusses the advantages for companies to be in compliance and its importance.

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Mathematical model modification for stress state of high-speed axial fan blades in mining industry

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2019-10-0-206-213 ◽

2019 ◽

Vol 10 ◽

pp. 206-213 ◽

Cited By ~ 1

Author(s):

V.M. Tauger ◽

◽

A.V. Lifanov ◽

V.N. Makarov ◽

N.V. Makarov ◽

...

Keyword(s):

Mathematical Model ◽

Stress State ◽

High Speed ◽

Mining Industry ◽

Axial Fan ◽

Model Modification

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Mathematical Model of Leakage during Pressure Tests of Oil and Gas Pipelines

Journal of Pipeline Systems Engineering and Practice ◽

10.1061/(asce)ps.1949-1204.0000195 ◽

2015 ◽

Vol 6 (4) ◽

pp. 04015001 ◽

Cited By ~ 3

Author(s):

Xiaonan Wu ◽

Hongfang Lu ◽

Kun Huang ◽

Zongming Yuan ◽

Xiao Sun

Keyword(s):

Mathematical Model ◽

Oil And Gas ◽

Gas Pipelines ◽

Pressure Tests ◽

Oil And Gas Pipelines

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Data Processing Method of Well Testing

Oil and Gas technologies ◽

10.32935/1815-2600-221-134-3-55-59 ◽

2021 ◽

Vol 134 (3) ◽

pp. 55-59

Author(s):

V. V. Dmitruk ◽

◽

A.A. Kasyanenko ◽

E.B. Kovinchenko ◽

I.V. Kravchenko ◽

...

Keyword(s):

Natural Gas ◽

Oil And Gas ◽

Cooling System ◽

Research Work ◽

Climatic Conditions ◽

Gas Condensate ◽

Air Cooling ◽

Well Testing ◽

Technological Processes ◽

Compressed Gas

This publication discusses research work to improve the existing process for cooling compressed gas at the Yuzhno-Russkoye oil and gas condensate field of OJSC «Severneftegazprom». This project consisted in a scientific study of technological processes for the treatment, compression and transportation of natural gas. Based on the results of the research project, a system for additional cooling of compressed gas after the gas pumping units of the booster compressor station was developed (independent of the ambient temperature). When implementing into the existing technological process of cooling the compressed gas, the developed system will provide the required temperature parameters of the natural gas together with the operated air cooling units of gas and recuperative heat exchangers. To select an additional gas cooling system providing the required cooling capacity, taking into account existing energy resources (electricity, natural gas) and climatic conditions of the Yuzhno-Russkoe oil and gas condensate field, a detailed modeling of the different options of cooling systems of gas actually available on the market of this equipment in Russia and the option selection with the highest rates of integral effect and performance index. The proposed solution guarantees a stable supply of commercial natural gas within the framework of contractual obligations and excludes the influence of temperature factors of the environment on technological processes.

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Method of effective circulation control of high speed fans impellors

Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal ◽

10.21440/0536-1028-2021-4-92-100 ◽

2021 ◽

pp. 92-100

Author(s):

Vladimir Makarov ◽

Keyword(s):

Critical Points ◽

Air Conditioning ◽

High Speed ◽

Oil And Gas ◽

High Efficiency ◽

Control Flow ◽

Air Cooling ◽

Circulation Control ◽

Gas Cooling ◽

The Cost

Research relevance. The high-level competitiveness of Russian oil and gas sector enterprises in the global economic space is impossible to reach without accelerating the restructuring of existing air-cooling apparatuses and developing new ones. It should be carried out with regard to modern technology introduction and advanced achievements in mining. The cost of gas cooling during its transportation via main gas pipelines in the cost structure reaches 22%. Besides, annual energy wastage on compressed gas cooling by fan installations is commensurate with the cost of the air cooling devices. It is essential to develop active means of air conditioning units control in order to improve their efficiency and aerodynamic adaptability that affect the competitiveness of oil and gas enterprises. ISSN 0536-1028 «Известия вузов. Горный журнал», № 4, 2021 99 Research aim is to develop a mathematical model for fan unit parameters active control. Research methods are based on the experimentally proven hypothesis about the dependence between the control flow rate on the impeller blades and the position of the rear critical points of the blades. Research results. A method was developed based on conformal transformations, the theory of residues, singular equations, and hydrodynamic analogy. The dependence between the position of the profiles critical points and flow circulation was obtained. The dependence of the aerodynamic adaptability of the fan units in air conditioning devices on effective critical point position and the energy characteristics of the impeller blades flow controlling source has been established. A patent was obtained for the fan unit impeller with active circulation control from air flow sources from the fan casing. High efficiency of the developed circulation control method for increasing the operational efficiency and aerodynamic adaptability of air-cooled fan units has been proved. An aerodynamic scheme of ОV 121TN was developed. A fan unit OGM VU2.7-1.8K4 with aerodynamic adaptability increased by 34% was created.

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