scholarly journals Numerical simulation and simplified calculation method for heat exchange performance of dry air cooler in natural gas pipeline compressor station

2020 ◽  
Vol 8 (6) ◽  
pp. 2256-2270 ◽  
Author(s):  
Enbin Liu ◽  
Bingyan Guo ◽  
Liuxin Lv ◽  
Weibiao Qiao ◽  
Mohammadamin Azimi
Keyword(s):  
Numerical Simulation ◽  
Heat Exchange ◽  
Natural Gas ◽  
Calculation Method ◽  
Compressor Station ◽  
Dry Air ◽  
Natural Gas Pipeline ◽  
Exchange Performance ◽  
Air Cooler ◽  
Simplified Calculation

scholarly journals Anhydrous Cooling Mode Applied in External cooling Equipment of HVDC Converter

2018 ◽  
Vol 7 (3) ◽  
pp. 149
Author(s):  
Yu-liang WEN ◽  
Guang-wu WANG ◽  
Zhi-min LU ◽  
Jian-ye CHEN
Keyword(s):  
Natural Gas ◽  
Cooling System ◽  
Gas Pipeline ◽  
Cooling Mode ◽  
Long Distance ◽  
Natural Gas Pipeline ◽  
External Cooling ◽  
Operation Process ◽  
In Series ◽  
Air Cooler

Anhydrous Cooling Mode is that it consumes little water in the operation process. This paper made some investigates in the external cooling equipment which is currently applied in the HVDC converter substation. There are some anhydrous cooling modes in the HVDC converter substation. A case of anhydrous cooling mode which air cooler series with the water chiller applied in the long distance natural gas pipeline pressurization was introduced. It is recommended that the cooling system composed of air cooler in series with chilling water will be preferentially chosen as an anhydrous cooling mode applied in the HVDC converter external cooling equipment.

scholarly journals Experimental and Numerical Simulation Study on the Shock and Vibration Effect of OD1422-X80 Mainline Natural Gas Pipeline Explosion

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Huayuan Ma ◽  
Mingshou Zhong ◽  
Xinghua Li ◽  
Quanmin Xie ◽  
You Zhou ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Ground Vibration ◽  
Gas Pipeline ◽  
Experimental Results ◽  
Maximum Speed ◽  
Impact Compression ◽  
Time Frequency ◽  
Vibration Effect ◽  
Natural Gas Pipeline

In this paper, the explosion experiment of the OD1422-X80 natural gas pipeline was carried out. The phenomenon of pipeline explosion was recorded, and a large amount of data on vibration effects were obtained. The data showed that the ground vibration during the explosion was mainly caused by the physical explosion process, and the subsequent gas explosion did not produce strong vibration. Based on the ANSYS/LS-DYNA platform, a numerical calculation model of this experiment was established. The numerical results agreed well with the experimental results. Simulation and experimental results showed that when the gas pressure in the pipe was lower than 7 MPa, the pipeline cracks stop growing. The maximum speed of the pipe wall moving outward reached 50 m/s, which formed a huge impact compression effect on the surrounding soil. This state spread to distant places and gradually decayed into an elastic stress wave, which formed a ground vibration effect. Time-frequency analysis was introduced into the vibration signal processing. The analysis results showed that the main frequency of pipeline explosion vibration was distributed around 10 Hz and had a long duration. The research results provided a reference for subsequent gas pipeline explosion test and numerical simulation research.

Numerical Simulation of Liquefied Natural Gas in Rib-Tube

2013 ◽  
Vol 483 ◽  
pp. 162-165
Author(s):  
Su Hou De ◽  
Zhang Yu Fu ◽  
Ji Yong Che ◽  
Xiao Long Wen
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Fluid Flow ◽  
Heat Exchange ◽  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Dispersed Phase ◽  
Wall Function ◽  
Governing Equations ◽  
Set Up

The flow of liquefied natural gas (LNG) which was coupled between heat transfer and fluid-flow in rib-tube was studied in this paper. Based on theoretical analysis, the model and wall-function were chosen to simulate the flow field of rib-tube, and the multiphase flow was described by the mixture model, in which the dispersed phase was defined by different velocity. In addtion, self-defining functions were used and governing equations were set up to solve the dispersed phase, and the result were compared with the experiment. The process of fluid-flow and heat exchange on rib-tube was simulated, and the contours of temperature, pressure, velocity, gas fraction were obtained, which showed that, the parameters of above changed when the temperature was rising and the LNG evaporating along the rib-tube, and a mixed process existed in the middle of the heat tube.

Internal Corrosion Monitoring System Selection for Cross Country Natural Gas Pipeline: A Case Study of SHPPL

2015 ◽  
Author(s):  
Sandeep Vyas
Keyword(s):  
Natural Gas ◽  
Monitoring System ◽  
Gas Pipeline ◽  
Operating Conditions ◽  
Corrosion Monitoring ◽  
Compressor Station ◽  
Internal Corrosion ◽  
Monitoring Techniques ◽  
Natural Gas Pipeline ◽  
Pipeline Project

Reliance Gas Pipelines Limited (RGPL) is currently implementing a gas pipeline project from Shahdol, Madhya Pradesh to Phulpur, Uttar Pradesh for evacuation of gas produced from Coal Bed Methane (CBM) blocks owned by Reliance Industries Ltd. This pipeline will be hooked up with GAIL’s HVJ Pipeline at Phulpur. Over all Pipeline system includes 312 km (approx.) long trunk line, and associated facilities such as Compressor Station at Shahdol, Intermediate Pigging facilities, Metering & Regulating facilities at Phulpur and 12 No. Mainline valve stations. Gas produced from CBM blocks will be dehydrated within Gas Gathering Station facilities of CBM Project located upstream of pipeline Compressor station at Shahdol. Gas received at pipeline battery limit is dry and non-corrosive gas in nature, Internal corrosion is not expected in normal course of operation, however internal corrosion of the natural gas pipeline can occur when the pipe wall is exposed to moisture and other contaminants either under process upset conditions or under particular operating conditions. Even though internal corrosion is not expected during normal course of operations, to take care of any eventuality, it is proposed to implement Internal Corrosion Monitoring (ICMS) system in this project. ICMS will provide an efficient and reliable means of continuous monitoring internal corrosion. Internal Corrosion Monitoring (ICMS) system is used as a part of overall integrity management framework; to achieve two objectives viz., verify the corrosive behaviour of gas and to verify the efficacy of applied preventive actions. Philosophy involved in evaluating a suitable CM technique would include : • Applicable corrosion damage mechanisms, anticipated corrosion rates and probable locations. • Suitable CM technique and location based on process condition, system corrosivity, water content, pigging facilities, available corrosion allowance, design life, maintenance etc., • Measurement frequency. Some of the Corrosion Monitoring techniques used for pipeline and of relevance are: • Weight-loss Corrosion Coupons (CC), • Electrical Resistance probes (ER), • Linear Polarization Resistance Probe (LPR) • Ultrasonic Thickness Measurement (UT) • Sampling Points (SP) This paper discusses the merits / demerits of these corrosion monitoring techniques, considerations for selecting a specific technique for the Shahdol – Phulpur Gas Pipeline Project and highlights the implementation of the internal corrosion monitoring system.

Numerical Simulation on Flow Field inside the Drainage Valve of the Natural Gas Pipeline

2013 ◽  
Vol 853 ◽  
pp. 377-383
Author(s):  
Zhian Deng ◽  
Hao Yun Deng ◽  
Mei Xie
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Flow Field ◽  
Velocity Vector ◽  
Gas Pipeline ◽  
Natural Gas Pipeline ◽  
The Standard Model ◽  
Vector Distribution ◽  
Flow Field Characteristics ◽  
Valve Opening

In order to ensure safety and reliable operation of the natural gas pipeline drainage valve,the 3D numerical simulation on flow field characteristics inside the drainage valve of the natural gas pipeline under the different conditions of the seasons of winter and summer is carried out by using the standard model. In the tow different season condition, the streamline and velocity vector distribution inside the drainage valve has been studied. Under the two seasons conditions are studied. The results show that as the change of drainage valve opening the turbulence appear in the valve and the maximum value appears in the inlet,which the winter is larger than summer.The velocity vector distribution in the drainage valve is not the same and the larger velocity appears at the drain exit with the valve opening increasing. The differences in temperature, condensate discharge, condensate gas pipeline in different displacement,density and viscosity in the winter seasons and summer seasons results in the different characteristic.of the flow field characteristics inside discharging valve.

Analysis of Suspended Pipeline Stress Sensitivity

2014 ◽  
Vol 501-504 ◽  
pp. 2331-2334 ◽  
Author(s):  
Xiao Nan Wu ◽  
Hong Fang Lu ◽  
Shi Juan Wu ◽  
Huang Kun ◽  
Xi Chen ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Safety Management ◽  
Stress Sensitivity ◽  
Analysis Software ◽  
Natural Gas Pipeline ◽  
Soil Subsidence ◽  
Two Factors ◽  
Pipeline Failure ◽  
Selection Of

Natural gas pipeline laying process will inevitably go through some of the earthquake-prone areas, these areas of soil subsidence, will cause the pipeline vacant, vacant section of the pipeline failure may cause pipeline rupture. Effects of suspended pipeline stress safety usually have two factors: suspended length and the buoyancy of water. In order to explore the sensitivity of these two factors on suspended pipeline stress, we do numerical simulation of XX suspended pipeline using the general stress analysis software CAESAR II. Research shows that suspended length of pipe is having a greater sensitivity on pipeline stress, and the buoyancy of water is relatively small. The results provide some reference for safety management and selection of pipeline.

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