掺氢对天然气管道管网水力和热力特性的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-01-01 DOI:10.2516/ogst/2021052

Heng Zhang, Jingfa Li, Yue Su, Peng Wang, Bo Yu

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引用次数: 11

摘要

将一部分氢气混合到天然气管道或城市管网中是一种有效的氢气输送方法。本文建立了混氢天然气(HBNG)输气的数学模型，数值研究了混氢对天然气管道管网水力和热力特性的影响。讨论了配氢比对离心压缩机性能的影响以及管道与压缩机联合运行的工作点。结果表明，与无氢天然气相比，掺氢天然气可以降低管道摩擦阻力，提高体积流量。然而，由于HBNG的体积热值较低，在相同的运输条件下，能量流率反而降低。同时，由于氢气的混合，管道沿线的温度下降速度减慢。随着配氢比的增大，离心式压缩机性能下降，管道与离心式压缩机联合运行的工作点向高容积流量、低压力方向移动。这项研究有望揭示通过天然气管道和管网输送氢气的问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effects of hydrogen blending on hydraulic and thermal characteristics of natural gas pipeline and pipe network

Blending a fraction of hydrogen into the natural gas pipeline or urban pipe network is an efficient approach for hydrogen delivery. In this paper, the mathematical model of Hydrogen-Blended Natural Gas (HBNG) transportation is established, and the influences of hydrogen blending on hydraulic and thermal characteristics of natural gas pipeline and pipe network are numerically investigated. The impact of hydrogen blending ratio on the performance of centrifugal compressor and the operating point for joint operation of pipeline and compressor is discussed. Results illustrate that compared with natural gas without hydrogen, the hydrogen blending can reduce the pipeline friction resistance and increase the volume flow rate. However, due to the lower volumetric calorific value of HBNG, the energy flow rate actually decreases under the same transportation condition. Meanwhile, the temperature drop along the pipeline slows down due to the blended hydrogen. The performance degradation of centrifugal compressor occurs with the increasing hydrogen blending ratio, and the operating point for joint operation of pipeline and centrifugal compressor moves to the direction of higher volume flow rate and lower pressure. This study is expected to shed a light on the hydrogen delivery by natural gas pipelines and pipe networks.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.