Abstract
Given the continuous optimisation of the energy structure, the proportion of natural gas consumption in China increases annually, the urban gas pipeline network continues to extend outward, and the supply range continues to expand. Although an increasing number of users can use natural gas, the coverage of the natural gas pipeline network remains low in some areas in China. A “point supply” pattern, which provides gas through liquefied natural gas (LNG), compressed natural gas (CNG) and liquefied petroleum gas (LPG) supply stations, has been developed to solve the problem of gas unavailability in areas not covered by the pipeline network. This pattern flexibly supplies gas, whose cost is low and market determined. Thus, the substantial development of these gas supply stations has been promoted. This pattern will continue to play an important role in the future. However, no unified standards for the construction of these gas supply stations have been provided, resulting in various problems, such as unreasonable location, inadequate management, potential risk and imbalance between supply and demand. On the basis of these concerns, this research attempts to study the urban bearing capacity of gas supply stations, provide some new ideas for the construction and planning of urban gas supply stations, and help promote sustainable urban development. The pressure–state–response model is adjusted to the pressure–state–capability model, which is used as a basis for proposing an evaluation index system and calculation models for the comprehensive evaluation of the urban bearing capacity of gas supply stations on city and country scales. The proposed methodology is used in a case study of urban agglomerations in the Yangtze River Delta.
Highlights
The use of low-carbon energy in the world has accelerated, and natural gas and non-fossil energy have become the main directions of global energy development
This study aims to propose a model to assess urban bearing capacity to gas supply stations and loading state of them on both city and country scales, which will be a small and important step to fill in the research gap in this aspect and results
The stress–state–response model has been adjusted to the pressure–state–capacity model (Figure 2)
Summary
The use of low-carbon energy in the world has accelerated, and natural gas and non-fossil energy have become the main directions of global energy development. To accelerate the adjustment of the energy structure and increase the supply of clean energy, this policy proposed a series of measures, such as controlling total coal consumption, accelerating the alternative use of clean energy and formulating a natural gas development plan. The 13th Five-Year Standard for Energy Development, issued in 2017, put forward the target of energy consumption structures for the 13th Five-Year Plan period: the proportion of non-fossil energy consumption will be increased to over 15%, the proportion of natural gas consumption will reach 10%, and the proportion of coal consumption will be reduced to under 58% [2]. In 2017, the length of China’s natural gas pipeline and the total natural gas consumption respectively reached 623,253 km and 207.806 billion m3, which accounted for 7% of the total energy consumption [3]
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