Study On The Layout Planning And Safety Evaluation Of Urban Hydrogen Refueling Station

Compared with traditional fossil energy sources,hydrogen energy is gradually regarded as an ideal alternative energy source for solving resource shortages and environmental pollution due to its wide range of sources,high calorific value,no pollution,and easy storage.Hydrogen fuel cell vehicles are the breakthrough point for the application of hydrogen energy in the transportation field,and are also energy-saving and environment-friendly vehicles in the practical sense.The hydrogen refueling station is the supporting infrastructure for ensuring the fuel supply of hydrogen fuel cell vehicles,and its layout planning and safety research is particularly important.The hydrogen source has a pre-emptive impact on the layout planning of the hydrogen refueling station.Hydrogen embrittlement of equipment materials in a high-pressure hydrogen environment is a peculiar phenomenon that threatens the safety of the hydrogen refueling station.Therefore,in addition to the systematic research on the layout planning of the hydrogen refueling station,this paper also evaluates the hydrogen source of the hydrogen refueling station,and at the same time,classifies the hydrogen embrittlement of equipment materials in the high-pressure hydrogen environment as the main line of safety research.The main work and results are as follows:(1)By comparing the development status of different hydrogen production technology evaluations,combined with the life cycle evaluation theory,a general evaluation system model suitable for hydrogen production technology was constructed,and its structural composition,boundary determination,inventory analysis and impact evaluation were systematically analyzed..The most energy-efficient way is to produce hydrogen from coke oven gas.The lowest is hydrogen produced by electrolyzed water,with values of 82.3% and18.7%,respectively.The energy efficiency of hydrogen production from natural gas steam reforming is 75.1%,which is obvious compared with hydrogen produced by electrolyzed water.(2)Focus on the three hydrogen sources of natural gas steam reforming hydrogen production,electrolysis water hydrogen production and coke oven gas hydrogen production.Based on the analysis of each hydrogen production technology production principle and process flow,according to the general evaluation system model constructed in this paper,Established a list of three hydrogen production technologies,a list of energy consumption,and a list of pollutant emissions,and systematically evaluated the three aspects of material energy consumption,environmental impact,and economic cost.(3)Comprehensively consider the energy return rate,the environmental impact potential value and the hydrogen cost price index,and select the hydrogen source with high energy efficiency,environmental protection and economy in the horizontal ratio.The hydrogen source development mode of the hydrogen refueling station has been determined: hydrogen production by natural gas steam reforming in the near-term,hydrogen production in industrial by-products,preferential selection of coke oven gas hydrogen production;long-term consideration of hydropower,wind power,nuclear power and other renewable energy electrolysis water system Hydrogen mode.(4)In-depth analysis of the principles and influencing factors in the layout planning of hydrogen refueling stations,and proposed planning requirements including grade division,site selection,layout and process flow,and established a demand forecasting model for hydrogen refueling stations and based on hierarchical fuzzy Site evaluation model for comprehensive evaluation theory.(5)Referring to the literature research on hydrogen embrittlement of metal materials at home and abroad,the principle characteristics and influencing factors of embrittlement of high-pressure hydrogen environment materials are analyzed.The research methods of compatibility between materials and hydrogen and the anti-hydrogen embrittlement properties of common metals are discussed.The general standard for the selection of equipment for hydrogen refueling stations,and the reference for engineering design is given to ensure the safe operation of the hydrogen refueling station.