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期刊论文 11

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DX旋挖挤扩灌注桩 1

LNG 1

LNG冷能 1

个人风险 1

低温海水资源 1

公共安全 1

商务架构 1

土地利用规划 1

总买总卖 1

极限承载力 1

桩侧阻力 1

桩端阻力 1

沉降 1

海洋温差能 1

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LNG-FPSO: Offshore LNG solution

GU Yan, JU Yonglin

《能源前沿(英文)》 2008年 第2卷 第3期   页码 249-255 doi: 10.1007/s11708-008-0050-1

摘要: The floating production, storage and offloading system for liquefied natural gas (LNG-FPSO), is a new conceptual unit and an effective and realistic way for exploitation, recovery, storage, transportation and end-use applications of marginal gas fields and offshore associated-gas resources. However, a real LNG-FPSO unit cannot be built unless some breakthroughs in many key technologies are produced. Many unique characteristics of LNG-FPSO, such as restricted space, platform motion, LNG sloshing in inner storage tank and offloading system, which have not been considered in the onshore projects, are the most rigorous factors to be taken into account during design. In this paper, the overall layout of a typical LNG-FPSO unit is reviewed; the leading liquefaction technologies and processes are compared and discussed. Taking the effects of the vessel motion and limited space into account, the applicability of the main systems and key equipments of storage, offloading and power supply, are analyzed.

关键词: associated-gas     LNG-FPSO     transportation     recovery     effective    

A simplified model of direct-contact heat transfer in desalination system utilizing LNG cold energy

Qingqing SHEN, Wensheng LIN, Anzhong GU, Yonglin JU

《能源前沿(英文)》 2012年 第6卷 第2期   页码 122-128 doi: 10.1007/s11708-012-0175-0

摘要: With the increasingly extensive utilization of liquefied natural gas (LNG) in China today, sustainable and effective using of LNG cold energy is becoming increasingly important. In this paper, the utilization of LNG cold energy in seawater desalination system is proposed and analyzed. In this system, the cold energy of the LNG is first transferred to a kind of refrigerant, i.e., butane, which is immiscible with water. The cold refrigerant is then directly injected into the seawater. As a result, the refrigerant droplet is continuously heated and vaporized, and in consequence some of the seawater is simultaneously frozen. The formed ice crystal contains much less salt than that in the original seawater. A simplified model of the direct-contact heat transfer in this desalination system is proposed and theoretical analyses are conducted, taking into account both energy balance and population balance. The number density distribution of two-phase bubbles, the heat transfer between the two immiscible fluids, and the temperature variation are then deduced. The influences of initial size of dispersed phase droplets, the initial temperature of continuous phase, and the volumetric heat transfer coefficient are also clarified. The calculated results are in reasonable agreement with the available experimental data of the R114/water system.

关键词: liquefied natural gas (LNG)     cold energy utilization     desalination     direct-contact heat transfer    

Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

《能源前沿(英文)》 2022年 第16卷 第3期   页码 429-444 doi: 10.1007/s11708-021-0747-y

摘要: The intermediate fluid vaporizer (IFV), different from other liquefied natural gas (LNG) vaporizers, has many advantages and has shown a great potential for future applications. In this present paper, studies of IFV and its heat transfer characteristics in the LNG vaporization unit E2 are systematically reviewed. The research methods involved include theoretical analysis, experimental investigation, numerical simulation, and process simulation. First, relevant studies on the overall calculation and system design of IFV are summarized, including the structural innovation design, the thermal calculation model, and the selection of different intermediate fluids. Moreover, studies on the fluid flow and heat transfer behaviors of the supercritical LNG inside the tubes and the condensation heat transfer of the intermediate fluid outside the tubes are summarized. In the thermal calculations of the IFV, the selections of the existing heat transfer correlations about the intermediate fluids are inconsistent in different studies, and there lacks the accuracy evaluation of those correlations or comparison with experimental data. Furthermore, corresponding experiments or numerical simulations on the cryogenic condensation heat transfer outside the tubes in the IFV need to be further improved, compared to those in the refrigeration and air-conditioning temperature range. Therefore, suggestions for further studies of IFV are provided as well.

关键词: intermediate fluid vaporizer     design of structure and intermediate fluid     condensation heat transfer    

Chaotic behavior of LNG after stratification in main stream region of storage tank

WANG Jingjing, MA Xiaoqian

《能源前沿(英文)》 2008年 第2卷 第4期   页码 514-518 doi: 10.1007/s11708-008-0076-4

摘要: A study of the chaotic behavior of liquefied natural gas (LNG) after stratification in the main stream region of a storage tank was conducted. Based on non-linear dynamics, a 2-dimensional Rayleigh-Benard convection model was developed to simulate the convection, Lorenz equations of LNG convection were deduced from conservation equations, and the Runge-Kutta method was used to solve the equations. The results showed that when = 1.33, 106 < < 1470, chaos was obtained, which meant that the velocity field and the temperature field were highly unsteady. In addition, the influence of temperature and scale factor on the solutions and the corresponding range of parameters were studied. The results revealed that the chaos in LNG convection resulted from the interaction of buoyancy and viscid forces. A small quantity of heat impacting the storage tank would lead to a strong and unstable convection of LNG in the main stream region.

关键词: Runge-Kutta     non-linear     corresponding     temperature     addition    

基于个人风险的土地利用规划在LNG储备库的应用

李清水,刘茂,操铮,王珅

《中国工程科学》 2008年 第10卷 第9期   页码 79-83

摘要:

对基于个人风险的土地利用规划进行研究,确定方法的框架和程序,并应用于某拟建液化天然气储备库周边的土地利用与布局调整。对拟建天然气储备库可能发生的事故,选取蒸气云爆炸及沸腾液体扩展蒸气爆炸进行讨论。在确定事故发生概率及事故后果的基础上,对拟建液化天然气储备库的个人风险进行计算。借鉴英国土地利用规划中个人风险的可接受标准,在液化天然气储备库周围划分三个风险区域,根据各区域的功能规定及储备库周围土地利用现状,对储备库周围的土地利用进行规划与调整。结果表明,液化天然气储备库附近有两处居民区、一个工厂需要搬迁。基于个人风险的土地利用规划方法在合理确定重大 工程选址及周边建筑与设施的布局上是行之有效的方法。

关键词: 公共安全     土地利用规划     风险定量分析     个人风险     LNG    

DX旋挖挤扩灌注桩在LNG储存罐中的应用

贺德新,张成伟,郑建华,贺建彤,张新生

《中国工程科学》 2012年 第14卷 第1期   页码 19-25

摘要:

针对场地上部为吹填海砂、下部为粉砂的特殊地层条件,在储存罐的基础中采用了普通直孔灌注桩和三节DX旋挖挤扩灌注桩;通过现场自平衡载荷试验,判定桩的竖向抗压极限承载力和沉降量,分析桩的载荷传递机理,并对桩侧阻力、桩端阻力的分配和发展规律进行研究;同时通过对两种桩的试验结果进行对比,发现DX挤扩灌注桩的极限承载力、桩身沉降明显优于普通直孔灌注桩,而且DX桩的长度明显小于直孔桩。

关键词: DX旋挖挤扩灌注桩     桩侧阻力     桩端阻力     极限承载力     沉降    

Can the Shanghai LNG Price Index indicate Chinese market?

Yeli ZENG, Cong DONG, Mikael HÖÖK, Jinhua SUN, Danyang SHI

《能源前沿(英文)》 2020年 第14卷 第4期   页码 726-739 doi: 10.1007/s11708-020-0701-4

摘要: China became the world’s second largest liquefied natural gas (LNG) importer in 2018 but has faced extremely high import costs due to a lack of bargaining power. Assessments of the Shanghai LNG Price Index, first released in 2015, are vital for improving the understanding of these cost dynamics. This paper, using the LNG price index data from the Shanghai Petroleum and Gas Exchange (SHPGX) coupled with domestic and international LNG prices from July 1, 2015 to December 31, 2018, estimates several econometric models to evaluate the long-term and short-term equilibriums of the Shanghai LNG Price Index, the responses to market information shocks and the leading or lagging relationships with LNG and alternative energy prices from other agencies. The results show that the LNG price index of the SHPGX has already exhibited a long-term equilibrium and short-term adjustment mechanisms to reflect the average price level and market movements, but the market information transparency and price discovery efficiency of the index are still inadequate. China’s LNG market is still relatively independent of other natural gas markets, and marketization reforms are under way in China. The influence of the SHPGX LNG price index on the trading decisions of market participants is expected to improve with further development of China’s LNG reforms, the formation of a natural gas entry-exit system, and the increasing liquidity of the hub.

关键词: liquefied natural gas     price index     Shanghai Petroleum and Gas Exchange     price discovery     market reforms    

LNG总买总卖模式上下游天然气销售合同商务架构搭建与风险传递

王家祥,罗伟中,陈翔,赵瑞聪,孙前,慕琦,王曦

《中国工程科学》 2011年 第13卷 第5期   页码 98-102

摘要:

在总买总卖模式下中海油气电集团国际贸易公司通过下游天然气销售合同条款的安排,使得在商务架构上中海油气电集团国际贸易公司成为上下游合同承上启下的合同主体,并保持了上下游合同的一致性且最大程度地减低中海油气电集团国际贸易公司的法律风险,做到风险无缝传递。

关键词: 总买总卖     商务架构     风险传递    

Numerical simulation and analysis of periodically oscillating pressure characteristics of inviscid flow in a rolling pipe

Yan GU, Yonglin JU

《能源前沿(英文)》 2012年 第6卷 第1期   页码 21-28 doi: 10.1007/s11708-012-0173-2

摘要: Floating liquefied natural gas (LNG) plants are gaining increasing attention in offshore energy exploitation. The effects of the periodically oscillatory motion on the fluid flow in all processes on the offshore plant are very complicated and require detailed thermodynamic and hydrodynamic analyses. In this paper, numerical simulations are conducted by computational fluid dynamics (CFD) code combined with user defined function (UDF) in order to understand the periodically oscillating pressure characteristics of inviscid flow in the rolling pipe. The computational model of the circular pipe flow is established with the excitated rolling motion, at the excitated frequencies of 1–4 rad/s, and the excitated amplitudes of 3°–15°, respectively. The influences of flow velocities and excitated conditions on pressure characteristics, including mean pressure, frequency and amplitude are systematically investigated. It is found that the pressure fluctuation of the inviscid flow remains almost constant at different flow velocities. The amplitude of the pressure fluctuation increases with the increasing of the excitated amplitude, and decreases with the increasing of the excitated frequency. It is also found that the period of the pressure fluctuation varies with the excitated frequency. Furthermore, theoretical analyses of the flow in the rolling circular pipe are conducted and the results are found in qualitative agreement with the numerical simulations.

关键词: pressure fluctuation     rolling     floating production storage and offloading unit for liquefied natural gas (LNG-FPSO) offshore    

A review of cryogenic power generation cycles with liquefied natural gas cold energy utilization

Feier XUE,Yu CHEN,Yonglin JU

《能源前沿(英文)》 2016年 第10卷 第3期   页码 363-374 doi: 10.1007/s11708-016-0397-7

摘要: Liquefied natural gas (LNG), an increasingly widely applied clean fuel, releases a large number of cold energy in its regasification process. In the present paper, the existing power generation cycles utilizing LNG cold energy are introduced and summarized. The direction of cycle improvement can be divided into the key factors affecting basic power generation cycles and the structural enhancement of cycles utilizing LNG cold energy. The former includes the effects of LNG-side parameters, working fluids, and inlet and outlet thermodynamic parameters of equipment, while the latter is based on Rankine cycle, Brayton cycle, Kalina cycle and their compound cycles. In the present paper, the diversities of cryogenic power generation cycles utilizing LNG cold energy are discussed and analyzed. It is pointed out that further researches should focus on the selection and component matching of organic mixed working fluids and the combination of process simulation and experimental investigation, etc.

关键词: liquefied natural gas (LNG) cold energy     power generation cycle     Rankine cycle     compound cycle    

温差能与低温海水资源综合利用研究

付强,王国荣,周守为,钟林,张理,余兴勇,杨浦

《中国工程科学》 2021年 第23卷 第6期   页码 52-60 doi: 10.15302/J-SSCAE-2021.06.007

摘要: 本文总结了国内外 OTEC 及综合利用的发展模式、技术装备所面临的挑战,针对南海温差能资源开发困境、广东省液化天然气( LNG)冷能资源浪费等情况,提出了以 LNG 气化的低温海水替代深层海水进行温差能发电的新途径建议以珠海 LNG 气化站为例,探索 LNG 冷能回收 – 温差能发电、低温冷海水综合利用示范基地的发展模式;通过初步概算示范基地的投资与收益,完成了相应模式的经济与技术可行性论证。

关键词: 海洋温差能     低温海水资源     LNG冷能     综合利用     温差能发电    

标题 作者 时间 类型 操作

LNG-FPSO: Offshore LNG solution

GU Yan, JU Yonglin

期刊论文

A simplified model of direct-contact heat transfer in desalination system utilizing LNG cold energy

Qingqing SHEN, Wensheng LIN, Anzhong GU, Yonglin JU

期刊论文

Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

期刊论文

Chaotic behavior of LNG after stratification in main stream region of storage tank

WANG Jingjing, MA Xiaoqian

期刊论文

基于个人风险的土地利用规划在LNG储备库的应用

李清水,刘茂,操铮,王珅

期刊论文

DX旋挖挤扩灌注桩在LNG储存罐中的应用

贺德新,张成伟,郑建华,贺建彤,张新生

期刊论文

Can the Shanghai LNG Price Index indicate Chinese market?

Yeli ZENG, Cong DONG, Mikael HÖÖK, Jinhua SUN, Danyang SHI

期刊论文

LNG总买总卖模式上下游天然气销售合同商务架构搭建与风险传递

王家祥,罗伟中,陈翔,赵瑞聪,孙前,慕琦,王曦

期刊论文

Numerical simulation and analysis of periodically oscillating pressure characteristics of inviscid flow in a rolling pipe

Yan GU, Yonglin JU

期刊论文

A review of cryogenic power generation cycles with liquefied natural gas cold energy utilization

Feier XUE,Yu CHEN,Yonglin JU

期刊论文

温差能与低温海水资源综合利用研究

付强,王国荣,周守为,钟林,张理,余兴勇,杨浦

期刊论文