scholarly journals Natural gas measurement technology system and its prospect in China

2020 ◽  
Vol 7 (4) ◽  
pp. 370-379
Author(s):  
Honggang Chang ◽  
Jiqin Duan
2021 ◽  
Vol 8 (2) ◽  
pp. 173-187
Author(s):  
Nengyou Wu ◽  
Yanlong Li ◽  
Yizhao Wan ◽  
Jianye Sun ◽  
Li Huang ◽  
...  

2021 ◽  
Vol 2121 (1) ◽  
pp. 011001

The 2021 2nd International Conference on Electrical Technology and Automatic Control (ICETAC 2021) was held on October 23, 2021 as a virtual conference due to the growing concerns over the coronavirus outbreak (COVID-19), and in order to protect the well-being of our attendees, partners, and staff as our number one priority. ICETAC 2021 brings together more than 70 national and international researchers from industry, government, and academia. We invited submissions of papers and abstracts on all topics related to Electrical Technology and Automatic Control. The conference provides networking opportunities for participants to share ideas, designs, and experiences on the state-of-the-art and future direction of Electrical Technology and Automatic Control. ICETAC 2021 will feature a high-quality technical & experiential program dealing with a mix of traditional and contemporary hot topics in paper presentations and high-profile keynotes. During the conference, the conference model was divided into three sessions, including oral presentations, keynote speeches, and online Q&A discussion. In the first part, some scholars, whose submissions were selected as the excellent papers, were given about 5-10 minutes to perform their oral presentations one by one. Then in the second part, keynote speakers were each allocated 30-45 minutes to hold their speeches. In the second part, we invited four professors as our keynote speakers. Prof. Yuanchang Zhong, our first keynote speaker, from Chongqing University, China. His mainly research focus on Electronic Technology, Electronic Measurement Technology, System Engineering etc. And then we had Prof. Qinmin Yang, from Zhejiang University, China. He presented an insightful speech: Theoretical research and practice in intelligent control design for wind energy. In this talk, challenges faced by control community for high reliable and efficient exploitation of wind energy are discussed. Prof. Badrul Hisham Ahmad, Universiti Teknikal Malaysia Melaka, performed a speech: Switchable Absorptive Bandstop to Bandpass Filter using Parallel-coupled Resonator. Our finale keynote speaker, Prof. He Yan, from Chongqing University of Technology, China. He presented an insightful speech: Research on Key Technologies of Semantic SLAM for Mobile Robot in Dynamic Scene. Their insightful speeches had triggered heated discussion in the third session of the conference. Every participant praised this conference for disseminating useful and insightful knowledge. The proceedings are a compilation of the accepted papers and represent an interesting outcome of the conference. Topics include but are not limited to the following areas: Electric Vehicle Technology, Intelligent Control System, Electrical Materials, Sensor Network System, Acoustics and Noise Control and more related topics. All the papers have been through rigorous review and process to meet the requirements of International publication standard. We would like to acknowledge all of those who supported ICETAC 2021. The help and contribution of each individual and institution was instrumental in the success of the conference. In particular, we would like to thank the organizing committee for its valuable inputs in shaping the conference program and reviewing the submitted papers. The Committee of ICETAC 2021 List of Committee member is available in this pdf.


2006 ◽  
Vol 45 (14) ◽  
pp. 5179-5184 ◽  
Author(s):  
S. Avila ◽  
A. Benito ◽  
C. Berro ◽  
S. T. Blanco ◽  
S. Otín ◽  
...  

Author(s):  
E. Loy Upp ◽  
Kevin L. Warner

The advantages of ultrasonic flow meters are well know — no line obstructions, large turndown ratio, bi-directionality, high accuracy — and ultrasonic meters are now widely used within the gas industry in a wide variety of applications. Ultrasonic meters are available in several different configurations ranging from high accuracy multipath spoolpiece meters to single path hot-tapped meters. While all of these meters operate on the same basic transit-time principle, there are significant differences in their operational aspects. This paper is intended to review the basic concepts of ultrasonic flow meters, to clarify the differences listed, and to explain how ultrasonic meters should be specified.


Author(s):  
David J. Pack ◽  
Terry J. Edwards ◽  
Derek Fawcett

This paper discusses the determination and application of the isentropic exponent to the various thermodynamic processes found in a high pressure natural gas transmission system. Increasing demands for more precise measurement of natural gas, coupled with the need for greater efficiency and accountability of transportation and processing operations had led to our research and development efforts into the more precise measurement of gas flow, and the determination of gas thermodynamic properties including isentropic exponent. The isentropic exponent has many applications, some of which include: • the determination of the expansion factor ϵ, for calcuation of flow using an orifice or venturi type meter; • the volumetric efficiency in a reciprocating compressor; • the determination of the compression head for a centrigual compressor; • the engine power required for the set given conditions for gas compressor; • the calculation of discharge temperatures for compressors; and • the direct measurement of gas density. As can be appreciated, the application of an incorrect value for the isentropic exponent represents an error in the parameter determined. For large volume gas flows, this can translate into a significant cost penalty.


Author(s):  
Elcio Cruz de Oliveira

In Brazil, the National Oil Agency — ANP and the National Metrology Institute elaborated Regulation No 1, on June 19th 2000. This government decree approves the Regulation of the Measurement Technique of Oil and Natural Gas, which establishes the minimum conditions and requirements for the oil and natural gas measurement systems, in order to guarantee accurate and complete results. The natural gas measurement fiscal systems must be projected, calibrated and operated so that the measurement uncertainty does not exceed 1.5%. Based on the norms AGA and ISO, the mathematical model for the calculation of the mass flow rate, depends on quantities that have well known uncertainty such as: orifice plate diameter, pipeline internal diameter, compressibility factor, discharge coefficient, differential pressure, static pressure and flow temperature. However, for the molar mass standard uncertainty fixed values are utilized in Brazil (mainly by IPT and PUC-RJ), around 0.30%, independent of the natural gas composition. The objective of this work is to develop a methodology to calculate the molar mass uncertainty of the natural gas derived from its chemical composition, analyzed by gaseous chromatography and to comparing it with the value currently practiced, evaluating the impact proceeding from this difference in the mass flow rate of the natural gas. Based on this methodology, the molar mass uncertainty is around 0.05% and the fiscal system uncertainty decreases in more than 10% when it is compared with the mass molar fixed value uncertainty.


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