Impact of hydrogen injection on thermophysical properties and measurement reliability in natural gas networks
Impact of hydrogen injection on thermophysical properties and measurement reliability in natural gas networks
复制标题
注氢对天然气管网热物理性质和测量可靠性的影响
DOI：
10.1051/e3sconf/202131201004
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发表时间：
2021
影响因子：
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通讯作者：
G. Spazzafumo
中科院分区：
文献类型：
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作者：
M. Dell’Isola;G. Ficco;L. Moretti;A. Perna;Daniele Candelaresi;G. Spazzafumo
在欧洲脱碳战略的背景下，氢气是中长期的关键能源载体。氢在能源组合中的更大渗透所带来的主要优势在于其固有的灵活性和与能源生产和消费替代技术的整合性。特别是，氢允许：i）使最终用途脱碳，因为它是零排放的能量载体，并且可以通过以不存在温室气体排放为特征的工艺（例如水电解）来生产; ii）帮助平衡电网，支持不可编程的可再生能源的整合; iii）在生产过剩时期利用天然气传输和分配网络作为存储系统。然而，将氢气注入天然气基础设施直接影响气体混合物本身的热物理性质，例如密度、热值、沃泊指数、声速等[1]。气体混合物的热物理性质的变化反过来又直接影响最终使用服务的效率和安全性以及体积和气体质量测量系统的可靠性和可靠性。在本文中，作者提出了一个关于氢气注入对天然气混合物的性质的影响的研究结果。详细分析了不同氢含量的混合气体热力性质的变化。此外，还评估了上述变化对压缩因子测量精度的理论影响。
In the context of the European decarbonization strategy, hydrogen is a key energy carrier in the medium to long term. The main advantages deriving from a greater penetration of hydrogen into the energy mix consist in its intrinsic characteristics of flexibility and integrability with alternative technologies for the production and consumption of energy. In particular, hydrogen allows to: i) decarbonise end uses, since it is a zero-emission energy carrier and can be produced with processes characterized by the absence of greenhouse gases emissions (e.g. water electrolysis); ii) help to balancing electricity grid supporting the integration of non-programmable renewable energy sources; iii) exploit the natural gas transmission and distribution networks as storage systems in overproduction periods. However, the hydrogen injection into the natural gas infrastructures directly influences thermophysical properties of the gas mixture itself, such as density, calorific value, Wobbe index, speed of sound, etc [1]. The change of the thermophysical properties of gaseous mixture, in turn, directly affects the end use service in terms of efficiency and safety as well as the metrological performance and reliability of the volume and gas quality measurement systems. In this paper, the authors present the results of a study about the impact of hydrogen injection on the properties of the natural gas mixture. In detail, the changes of the thermodynamic properties of the gaseous mixtures with different hydrogen content have been analysed. Moreover, the theoretical effects of the aforementioned variations on the accuracy of the compressibility factor measurement have been also assessed.