Widespread use of green hydrogen is a critical route to achieving a carbon-neutral society,but it cannot be accomplished without extensive hydrogen distribution.Hydrogen pipelines are the most energy-efficient approac...Widespread use of green hydrogen is a critical route to achieving a carbon-neutral society,but it cannot be accomplished without extensive hydrogen distribution.Hydrogen pipelines are the most energy-efficient approach to transporting hydrogen in areas with high,long-term demand for hydrogen.A well-known fact is that the properties of hydrogen differ from those of natural gas,which leads to significant variations in the pipeline transportation process.In addition,hydrogen can degrade the mechanical properties of steels,thereby affecting pipeline integrity.This situation has led to two inevitable key challenges in the current development of hydrogen-pipeline technology:economic viability and safety.Based on a review of the current state of hydrogen pipelines,including material compatibility with hydrogen,design methods,process operations,safety monitoring,and standards,this paper highlights key knowledge gaps in gaseous hydrogen pipelines.These gaps include the utilisation of high-strength materials for hydrogen pipelines,design of high-quality hydrogen pipelines,determination of hydrogen velocity,and repurposing of existing natural-gas pipelines.This review aims to identify the challenges in current hydrogen pipelines development and provide valuable suggestions for future research.展开更多
The Wei- Liu water supplying submarine pipeline is at present the longest one of the kind in China. It is about 4 kilometers long from Weihai City to Liugong Island in Shandong province. It took only half a year to de...The Wei- Liu water supplying submarine pipeline is at present the longest one of the kind in China. It is about 4 kilometers long from Weihai City to Liugong Island in Shandong province. It took only half a year to design and construct it. The project was of a high economic efficiency and some practical experiences were achieved. In this paper a general introduction to the design and construction of this pipeline is presented and such problems as the stability of the pipeline in very soft clay, design of curved slide for launching and estimation of dragging forces are expounded.展开更多
Under the background of economic development and social progress, people have a higher pursuit for the quality of life. Because of this, the construction of municipal water supply and drainage works needs to combine t...Under the background of economic development and social progress, people have a higher pursuit for the quality of life. Because of this, the construction of municipal water supply and drainage works needs to combine the development of the times and the actual needs of residents for quality control. It is necessary to know that the quality of municipal water supply and drainage projects directly affects the life experience of urban residents, so it is necessary to do a good job before construction in the planning and design stage, so as to ensure that the subsequent construction can meet the needs of urban development. Water supply and drainage is an important living system in urban development. Only by planning and designing in the early stage can it run healthily and for a long time in the subsequent use. The operation of a city cant be separated from the effective operation of infrastructure, so if you want to make the operation of a city convenient for residents lives, you need to do a good job in the design of urban water supply and drainage. Based on this, this paper explores the current design of municipal water supply and drainage, and makes scientific design and planning from various angles to ensure the operation of urban water supply and drainage and ensure the normal operation of urban infrastructure.展开更多
This paper presents the development and application of an innovative code to extract in an automated way data from the thermo-hydraulic simulator Olga.The results show that the tool can significantly reduce the time n...This paper presents the development and application of an innovative code to extract in an automated way data from the thermo-hydraulic simulator Olga.The results show that the tool can significantly reduce the time needed for the data extraction procedure and increase the reliability of results due to the fact that there is no more the need of the human operator.Moreover,during the data extraction phase,the Olga code is available for running different simulations allowing to optimize the use of this resource.展开更多
基金supported by the National Key Research and Development Program of China(No.2022YFB4003400)the Key Research and Development Program of Zhejiang Province of China(No.2023C01225)the State Key Laboratory of Clean Energy Utilization,China。
文摘Widespread use of green hydrogen is a critical route to achieving a carbon-neutral society,but it cannot be accomplished without extensive hydrogen distribution.Hydrogen pipelines are the most energy-efficient approach to transporting hydrogen in areas with high,long-term demand for hydrogen.A well-known fact is that the properties of hydrogen differ from those of natural gas,which leads to significant variations in the pipeline transportation process.In addition,hydrogen can degrade the mechanical properties of steels,thereby affecting pipeline integrity.This situation has led to two inevitable key challenges in the current development of hydrogen-pipeline technology:economic viability and safety.Based on a review of the current state of hydrogen pipelines,including material compatibility with hydrogen,design methods,process operations,safety monitoring,and standards,this paper highlights key knowledge gaps in gaseous hydrogen pipelines.These gaps include the utilisation of high-strength materials for hydrogen pipelines,design of high-quality hydrogen pipelines,determination of hydrogen velocity,and repurposing of existing natural-gas pipelines.This review aims to identify the challenges in current hydrogen pipelines development and provide valuable suggestions for future research.
文摘The Wei- Liu water supplying submarine pipeline is at present the longest one of the kind in China. It is about 4 kilometers long from Weihai City to Liugong Island in Shandong province. It took only half a year to design and construct it. The project was of a high economic efficiency and some practical experiences were achieved. In this paper a general introduction to the design and construction of this pipeline is presented and such problems as the stability of the pipeline in very soft clay, design of curved slide for launching and estimation of dragging forces are expounded.
文摘Under the background of economic development and social progress, people have a higher pursuit for the quality of life. Because of this, the construction of municipal water supply and drainage works needs to combine the development of the times and the actual needs of residents for quality control. It is necessary to know that the quality of municipal water supply and drainage projects directly affects the life experience of urban residents, so it is necessary to do a good job before construction in the planning and design stage, so as to ensure that the subsequent construction can meet the needs of urban development. Water supply and drainage is an important living system in urban development. Only by planning and designing in the early stage can it run healthily and for a long time in the subsequent use. The operation of a city cant be separated from the effective operation of infrastructure, so if you want to make the operation of a city convenient for residents lives, you need to do a good job in the design of urban water supply and drainage. Based on this, this paper explores the current design of municipal water supply and drainage, and makes scientific design and planning from various angles to ensure the operation of urban water supply and drainage and ensure the normal operation of urban infrastructure.
文摘This paper presents the development and application of an innovative code to extract in an automated way data from the thermo-hydraulic simulator Olga.The results show that the tool can significantly reduce the time needed for the data extraction procedure and increase the reliability of results due to the fact that there is no more the need of the human operator.Moreover,during the data extraction phase,the Olga code is available for running different simulations allowing to optimize the use of this resource.
