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Wang H.,China University of Petroleum - East China | Shi W.,China University of Petroleum - East China | An Y.,ShenZhen Gas Corporation Ltd.
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. Source

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. Source

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). Source

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. Source

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. Source

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