日本Nichias公司已开发成功用于液化天然气(LNG)管道的水发泡玻璃纤维增强聚氨酯泡沫塑料。该公司称，总部设在法国的气体输送与技术气体(Gas Transport & Technigaz)公司已认可了按照技术引进合同生产的用作热绝缘材料的聚氨酯泡...日本Nichias公司已开发成功用于液化天然气(LNG)管道的水发泡玻璃纤维增强聚氨酯泡沫塑料。该公司称，总部设在法国的气体输送与技术气体(Gas Transport & Technigaz)公司已认可了按照技术引进合同生产的用作热绝缘材料的聚氨酯泡沫塑料的质量。展开更多
2020年3月28日,中国石油西部管道公司(以下简称西部管道)研发的"OD 1422 mm X80管线钢管研制及应用技术"通过专家组鉴定,达到国际领先水平。"OD 1422 mm X80管线钢管应用技术"是第三代大输量天然气管道工程关键技...2020年3月28日,中国石油西部管道公司(以下简称西部管道)研发的"OD 1422 mm X80管线钢管研制及应用技术"通过专家组鉴定,达到国际领先水平。"OD 1422 mm X80管线钢管应用技术"是第三代大输量天然气管道工程关键技术的重要组成部分。根据中国石油建设四大油气战略通道的规划部署,为满足提高天然气管道输送能力的需求,西部管道依托当时的北天山备用通道项目,就"如何在满足输量要求的前提下减少管道数量、节省建设时间、减少管道占地和投资"等重大难题进行了多次论证,最终决定采用增大管径的方式来保证输气量的增加。研发任务由西部管道负责牵头组织实施。展开更多
In the hydraulic transporting process of cutter-suction mining natural gas hydrate, when the temperature-pressure equilibrium of gas hydrate is broken, gas hydrates dissociate into gas. As a result, solid-liquid two-p...In the hydraulic transporting process of cutter-suction mining natural gas hydrate, when the temperature-pressure equilibrium of gas hydrate is broken, gas hydrates dissociate into gas. As a result, solid-liquid two-phase flow(hydrate and water) transforms into gas-solid-liquid three-phase flow(methane, hydrate and water) inside the pipeline. The Euler model and CFD-PBM model were used to simulate gas-solid-liquid three-phase flow. Numerical simulation results show that the gas and solid phase gradually accumulate to the center of the pipe. Flow velocity decreases from center to boundary of the pipe along the radial direction. Comparison of numerical simulation results of two models reveals that the flow state simulated by CFD-PBM model is more uniform than that simulated by Euler model, and the main behavior of the bubble is small bubbles coalescence to large one. Comparison of numerical simulation and experimental investigation shows that the values of flow velocity and gas fraction in CFD-PBM model agree with experimental data better than those in Euler model. The proposed PBM model provides a more accurate and effective way to estimate three-phase flow state of transporting gas hydrate within the submarine pipeline.展开更多
The occurrence of liquid condensation in natural gas accounts for new challenges during the interoperability between transmission networks,where condensation would lead to higher pressure drops,lower line capacity and...The occurrence of liquid condensation in natural gas accounts for new challenges during the interoperability between transmission networks,where condensation would lead to higher pressure drops,lower line capacity and may cause safety problem.A successful case of hydrocarbon dew point(HCDP)analysis is demonstrated during the mixing of natural gases in the transmission pipeline.Methods used to predict the HCDP are combined with equations of state(EOS)and characterization of C6+heavy components.Predictions are compared with measured HCDP with different concentrations of mixed gases at a wide range of pressure and temperature scopes.Software named"PipeGasAnalysis"is developed and helps to systematic analyze the condensation problem,which will provide the guidance for the design and operation of the network.展开更多
文摘2020年3月28日,中国石油西部管道公司(以下简称西部管道)研发的"OD 1422 mm X80管线钢管研制及应用技术"通过专家组鉴定,达到国际领先水平。"OD 1422 mm X80管线钢管应用技术"是第三代大输量天然气管道工程关键技术的重要组成部分。根据中国石油建设四大油气战略通道的规划部署,为满足提高天然气管道输送能力的需求,西部管道依托当时的北天山备用通道项目,就"如何在满足输量要求的前提下减少管道数量、节省建设时间、减少管道占地和投资"等重大难题进行了多次论证,最终决定采用增大管径的方式来保证输气量的增加。研发任务由西部管道负责牵头组织实施。
基金Project(51375498) supported by the National Natural Science Foundation of China
文摘In the hydraulic transporting process of cutter-suction mining natural gas hydrate, when the temperature-pressure equilibrium of gas hydrate is broken, gas hydrates dissociate into gas. As a result, solid-liquid two-phase flow(hydrate and water) transforms into gas-solid-liquid three-phase flow(methane, hydrate and water) inside the pipeline. The Euler model and CFD-PBM model were used to simulate gas-solid-liquid three-phase flow. Numerical simulation results show that the gas and solid phase gradually accumulate to the center of the pipe. Flow velocity decreases from center to boundary of the pipe along the radial direction. Comparison of numerical simulation results of two models reveals that the flow state simulated by CFD-PBM model is more uniform than that simulated by Euler model, and the main behavior of the bubble is small bubbles coalescence to large one. Comparison of numerical simulation and experimental investigation shows that the values of flow velocity and gas fraction in CFD-PBM model agree with experimental data better than those in Euler model. The proposed PBM model provides a more accurate and effective way to estimate three-phase flow state of transporting gas hydrate within the submarine pipeline.
基金Project(2011ZX05026-004-03)supported by the Key National Science and Technology Specific Program,ChinaProject(NCET-12-0969)supported by the Program for New Century Excellent Talents in University,China+1 种基金Project(51104167)supported by the National Natural Science Foundation of ChinaProject(BJ-2011-02)supported by the Research Funds of China University of Petroleum-Beijing
文摘The occurrence of liquid condensation in natural gas accounts for new challenges during the interoperability between transmission networks,where condensation would lead to higher pressure drops,lower line capacity and may cause safety problem.A successful case of hydrocarbon dew point(HCDP)analysis is demonstrated during the mixing of natural gases in the transmission pipeline.Methods used to predict the HCDP are combined with equations of state(EOS)and characterization of C6+heavy components.Predictions are compared with measured HCDP with different concentrations of mixed gases at a wide range of pressure and temperature scopes.Software named"PipeGasAnalysis"is developed and helps to systematic analyze the condensation problem,which will provide the guidance for the design and operation of the network.
