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Chen F.,Shenzhen Gas Corporation Ltd. | Zhou J.-X.,Shenzhen Gas Corporation Ltd. | Mu N.-X.,Beijing Safetech Pipeline Co.
Corrosion and Protection | Year: 2013

Urban rail transit causes severe DC stray current interference on buried pipelines. In order to understand the DC stray current impact on pipelines, a pipeline which was severely interfered by stray current was selected for testing. Polar drainage and ground drainage were used and a polarity draineger was installed in the testing device. Before and after the drainage, the cathodic protection potential data were continuously monitored at the test stub. The results show that the potential of the pipeline protection reached the normal value and the pipeline was protected.


Wang H.,China University of Petroleum - East China | Shi W.,China University of Petroleum - East China | An Y.,ShenZhen Gas Ltd Corporation
Journal of Chemical Engineering of Japan | Year: 2015

The oil and gas industry in China has deployed risk management technologies for many years, including Layer Of Protection Analysis (LOPA), Alarm System Management (ASM) and Safety Instrumented System (SIS). These technologies, as well as their resulting risk treatments, consolidate the elements of the PSM system. However, to make the risk evaluation and following treatment possible, the determined scenario will be compared to some specified Risk Tolerable Criteria (RTC) in the risk management process of all of these technologies. By using the individual RTC mandated by Chinese Regulation Code No. 40 of the State Administration of Work Safety (SAWS) of China as a starting point, a new and structural procedure to develop Scenario oriented Individual RTC (SIRTC) is proposed. This procedure firstly decomposes the total RTC of a facility into specified process unit, and then continues onto a specified scenario level with the conception of residual risk under the LOPA framework. In this manner, it can avoid the common mismatch in risk comparison, as well as the inconsistency caused by empirical apportioning methods. The case study of a natural gas compression station is provided to illustrate the proposed approach and concerned numerical results are presented. © 2015 The Society of Chemical Engineers, Japan.


Peng S.,Southwest Petroleum University | Liu E.,Southwest Petroleum University | Xian W.,Shenzhen Gas Corporation Ltd | Wang D.,Southwest Petroleum University | Zhang H.,China National Petroleum Corporation
Journal of Environmental Biology | Year: 2015

Underground gas storage is a well-known strategic practice to seasonal peak shaving and emergency facility. The changing operation conditions of injection-production network directly affects the reliability of downstream gas supply of the city. In the present study, a model of injection-production network on the basis of field data analysis and research was established. By comparing the actual node pressure and simulation results, the reliability of model was verified. Based on the volume of underground gas storage and downstream gas consumption, the best seasonal peak-shaving schedule of the whole year was set. According to dynamic analysis of network, 20% increase in downstream demand could be fulfilled. Besides, the study also analyzed the well pressure and flow rate changes after shutdown of gas well, which is most likely to fail, and concludes that the best rescue time should be within 4 hr after gas supply interruption. The results would help in making decisions about the operation of injection-production network, which have importantsignificance in the environmental protection. © Triveni Enterprises, Lucknow (India).


Zhang H.,South China University of Technology | Xu W.D.,South China University of Technology | Teng Y.L.,ShenZhen Gas Corporation Ltd. | An C.M.,South China University of Technology
Advanced Materials Research | Year: 2013

A process of using LNG cold energy for ice-making was proposed, the process consisted of three parts: LNG vaporization system, the refrigerant circulation system and ice-making system. And LNG cold energy was delivered to ice-maker by refrigerant. Through design and optimization, the optimum temperature was confirmed in the ice-making process, the benefit of power saving was calculated, and the efficiency of energy utilization was analyzed by exergy analysis method. The research results showed that the average ice quantity was 1.59t/h with vaporization amount of 1000kg/h LNG. Taking ethylene glycol aqueous solution as refrigerant, when its temperature changed from -15°C to -6°C, the energy efficiency was higher with 18°C temperature difference. And the benefit of electricity saving was 112 kW and the efficiency of cold exergy was 5.52%. The process can be designed into skid-mounted, which can flexibly operate between different LNG vaporization stations. © (2013) Trans Tech Publications, Switzerland.


Shen H.,South China University of Technology | Chen Q.,South China University of Technology | Chen Q.,ShenZhen Gas Corporation Ltd | Lu H.,South China University of Technology | And 2 more authors.
Lecture Notes in Electrical Engineering | Year: 2012

With the development of China's natural gas industry and the improvement in the construction of medium,high pressure natural gas pipeline network,large scale utilization of pressure energy of natural gas with electronic gas alarm processors from pipeline network is possible.This paper developed a new process using pressure energy to produce cold water,analyzed the energy and electricity saving benefit of this process,and pointed out the optimization direction of this process.The results of the study show that: with this process,income of the natural gas station of 1950000 Nm3/d is 24000 yuan,amounts to support cold water for 161000m2 for 8 hours everyday and the energy efficiency of the total process is 62.49%.This process will have a broad application prospects with the further development of China's natural gas industry. © 2012 Springer-Verlag Berlin Heidelberg.


Liu J.,South China University of Technology | Liu J.,Shenzhen Gas Corporation Ltd. | Fan S.,South China University of Technology | Lang X.,South China University of Technology | Wang Y.,South China University of Technology
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011

High component of CO 2 in natural gas is hazardous for the utilization of natural gas. Thus CO 2 must be removed from natural gas. As one of the new separation technology, hydrate formation has more advantages than original technology. It can be carried out under milder conditions and it is wild-range applicable. Moreover, the gas regeneration rate is higher while the process is shorter. However, as the study time is short, hydrate formation has high energy consumption which makes it less commercially attractive. In this study, we show the broad prospect of the utilization of this technology and put forward the future research direction. © 2011 IEEE.


Wen Y.G.,Shenzhen Gas Corporation Ltd | Wen Y.G.,South China University of Technology | Chen Q.X.,Shenzhen Gas Corporation Ltd | Chen Y.W.,Shenzhen Gas Corporation Ltd | Fan S.S.,South China University of Technology
Advanced Materials Research | Year: 2013

Storage and transportation of natural gas with NGH method is a kind of novel technology developing rapidly at domestic and overseas currently. The stability and dissociation characteristic of hydrate at different temperature and pressure is a significant basis on its application and development. The existence of anomalous self-preservation effect indicates that gas hydrates have favorable stability in special low temperature range, and it provides theoretical and experimental basis for storage and transportation of natural gas with NGH method. The paper reviews study history and research development of hydrate self-preservation effect, and points out challenges for developing storage and transportation technology of natural gas with NGH. © (2013) Trans Tech Publications, Switzerland.


Liu J.,South China University of Technology | Liu J.,Shenzhen Gas Corporation Ltd. | Chen Q.,Shenzhen Gas Corporation Ltd. | Lang X.,South China University of Technology | And 2 more authors.
International Journal of Low-Carbon Technologies | Year: 2012

Shenzhen is a typical city of southern China. The current situation of natural gas utilization in Shenzhen is introduced. The experience of world energy consumption, especially the development trends of natural gas is reviewed. According to the characteristics of the economic development trends and the energy utilization planning in Shenzhen, the development prospect of natural gas utilization in Shenzhen is comprehensively analyzed. After the analysis, it is pointed out that natural gas will be a vital new source of energy utilization in Shenzhen. In the meanwhile, the problems and solution of interchangeability, price and alternate energy source in the natural gas development trend in Shenzhen are discussed. The results of the current study can be used as guidelines for the natural gas utilization and CO2 emission reduction in other cities of southern China. © The Author 2012. Published by Oxford University Press. All rights reserved.

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