Pipeline transportation is one of the major ways for the oil/gas transmission. To ensure the safety of oil/gas transmission pipeline is very important because of its primary role in national economic development and p...Pipeline transportation is one of the major ways for the oil/gas transmission. To ensure the safety of oil/gas transmission pipeline is very important because of its primary role in national economic development and people' s life quality improvement. In China, 20 000km of oil/gas pipelines are at work and 10 000km pipelines are being or will be constructed.展开更多
Prospect of engineering technologies for pipelines in ChinaIn recent years,China National Petroleum Corporation (CNPC) has made remarkable achievements in the field of oil and gas transmission pipeline engineering.
Simulation has proven to be an effective tool for analyzing pipeline network systems (PNS) in order to determine the design and operational variables which are essential for evaluating the performance of the system....Simulation has proven to be an effective tool for analyzing pipeline network systems (PNS) in order to determine the design and operational variables which are essential for evaluating the performance of the system. This paper discusses the use of simulation for performance analysis of transmission PNS. A simulation model was developed for determining flow and pressure variables for different configuration of PNS. The mathematical formulation for the simulation model was derived based on the principles of energy conservation, mass balance, and compressor characteristics. For the determination of the pressure and flow variables, solution procedure was developed based on iterative Newton Raphson scheme and implemented using visual C++6. Evaluations of the simulation model with the existing pipeline network system showed that the model enabled to determine the operational variables with less than ten iterations. The performances of the compressor working in the pipeline network system xvhich includes energy consumption, compression ratio and discharge pressure were evaluated to meet pressure requirements ranging from 4000-5000 kPa at various speed. Results of the analyses from the simulation indicated that the model could be used for performance analysis to assist decisions regarding the design and optimal operations of transmission PNS.展开更多
PetroChina signed natrual gas sales and supply contracts with three cities in Central China's Hunan Province for the natural gas pipeline from Zhongxian in Chongqing to Wuhan in Hubei in late October.The contracts...PetroChina signed natrual gas sales and supply contracts with three cities in Central China's Hunan Province for the natural gas pipeline from Zhongxian in Chongqing to Wuhan in Hubei in late October.The contracts are based on the 'take-or-pay' clauses,the international convention for natural gas pipeline.Under the contracts signed with Changde City,Yiyang City and Hengyang City, the gas consumption in the three cities will reach 130 million cubic meters in the first year and exceed 300 million cubic meters in the fifth year when the pipeline is put into operation.展开更多
文摘Pipeline transportation is one of the major ways for the oil/gas transmission. To ensure the safety of oil/gas transmission pipeline is very important because of its primary role in national economic development and people' s life quality improvement. In China, 20 000km of oil/gas pipelines are at work and 10 000km pipelines are being or will be constructed.
文摘Prospect of engineering technologies for pipelines in ChinaIn recent years,China National Petroleum Corporation (CNPC) has made remarkable achievements in the field of oil and gas transmission pipeline engineering.
文摘Simulation has proven to be an effective tool for analyzing pipeline network systems (PNS) in order to determine the design and operational variables which are essential for evaluating the performance of the system. This paper discusses the use of simulation for performance analysis of transmission PNS. A simulation model was developed for determining flow and pressure variables for different configuration of PNS. The mathematical formulation for the simulation model was derived based on the principles of energy conservation, mass balance, and compressor characteristics. For the determination of the pressure and flow variables, solution procedure was developed based on iterative Newton Raphson scheme and implemented using visual C++6. Evaluations of the simulation model with the existing pipeline network system showed that the model enabled to determine the operational variables with less than ten iterations. The performances of the compressor working in the pipeline network system xvhich includes energy consumption, compression ratio and discharge pressure were evaluated to meet pressure requirements ranging from 4000-5000 kPa at various speed. Results of the analyses from the simulation indicated that the model could be used for performance analysis to assist decisions regarding the design and optimal operations of transmission PNS.
文摘PetroChina signed natrual gas sales and supply contracts with three cities in Central China's Hunan Province for the natural gas pipeline from Zhongxian in Chongqing to Wuhan in Hubei in late October.The contracts are based on the 'take-or-pay' clauses,the international convention for natural gas pipeline.Under the contracts signed with Changde City,Yiyang City and Hengyang City, the gas consumption in the three cities will reach 130 million cubic meters in the first year and exceed 300 million cubic meters in the fifth year when the pipeline is put into operation.