The part of China,east of the Hu Huanyong Line,is commonly referred to as eastern China.It is characterized by a high population density and a well-developed economy;it also has huge energy demands.This study assesses...The part of China,east of the Hu Huanyong Line,is commonly referred to as eastern China.It is characterized by a high population density and a well-developed economy;it also has huge energy demands.This study assesses and promotes the large-scale development of geothermal resources in eastern China by analyzing deep geological structures,geothermal regimes,and typical geothermal systems.These analyses are based on data collected from geotectology,deep geophysics,geothermics,structural geology,and petrology.Determining the distribution patterns of intermediate-to-deep geothermal resources in the region helps develop prospects for their exploitation and utilization.Eastern China hosts superimposed layers of rocks from three major,global tectonic domainsd namely Paleo-Asian,Circum-Pacific,and Tethyan rocks.The structure of its crust and mantle exhibits a special flyover pattern,with basins and mountains as well as well-spaced uplifts and depressions alternatively on top.The lithosphere in Northeast China and North China is characterized by a thin,low density crust and mantle,whereas the lithosphere in South China has a thin,low density crust and a thick,high density mantle.The middle and upper crust contain geobodies with high conductivity and low velocity,with varying degrees of development that create favorable conditions for the formation and enrichment of geothermal resources.Moderate-to-high temperature geothermal resources are distributed in the MesozoiceCenozoic basins in eastern China,although moderate temperature geothermal resources with low abundance dominate.Porous sandstone reservoirs,karstified fractured-vuggy carbonate reservoirs,and fissured granite reservoirs are the main types of geothermal reservoirs in this region.Under the currently available technical conditions,the exploitation and utilization of geothermal resources in eastern China favor direct utilization over large-scale geothermal power generation.In Northeast China and North China,geothermal resources could be applied for large-scale geothermal heating purposes;geothermal heating could be applied during winter along parts of the Yangtze River while geothermal cooling would be more suitable for summer there;geothermal cooling could also be applied to much of South China.Geothermal resources can also be applied to high value-added industries,to aid agricultural practices,and for tourism.展开更多
China is one of the countries where there is abundant glacial water rears and glaciers exist in a vast area of mountainous regions. In this paper, a prehensive discusion is made for the characteristics of glacial wat...China is one of the countries where there is abundant glacial water rears and glaciers exist in a vast area of mountainous regions. In this paper, a prehensive discusion is made for the characteristics of glacial water resource, the chewical properties of matwater and the prospects of future utilization in China. It has found that the gladal water resource is a water resource system based on the effect of a solid water reservoir. Its degree of mineralization is low and it almost does not have any pollution. In particular glacial water is high quality fresh water resource in the inland arid region. It is necesary to reconfirm the value of this water and conduct further studies on the fundamentals of its application in order to ratiedly exploit, utilze and preserve the glacial water resource.展开更多
The utilization of steel slag has been a worldwide issue for a long time. Attention is increasingly being paid to the technological innovation and development of steel slag. Aiming at the development of environmentall...The utilization of steel slag has been a worldwide issue for a long time. Attention is increasingly being paid to the technological innovation and development of steel slag. Aiming at the development of environmentally friendly steel slag concrete materials and their use in a recyclable economy ,Baosteel has recently been conducting research on and using many new building materials, including steel slag powder concrete, steel slag pervious concrete, steel slag counter weight concrete and so on. In this way, steel slag has been turned from a kind of solid waste into a value-added material. The technology of steel slag utilization has been enriched and developed,while a new model of using Baosteel steel slag in a recyclable economy has also been explored and practised.展开更多
With rapid increase of distributed solar power generation and direct current(DC)based loads such as data centers,electric vehicles(EVs),and DC household appliances,the development trend of the power system is changed ...With rapid increase of distributed solar power generation and direct current(DC)based loads such as data centers,electric vehicles(EVs),and DC household appliances,the development trend of the power system is changed from conventional alternate current(AC)to DC.Traditional AC power systems can scarcely meet the development demand of new DC trends,especially since both the generation side and load side are comprised of DC-based electronic power components.With this background,low voltage direct current supply and utilization system(LVDCSUS)has attracted more and more attention for its great advantages over an AC grid to overcome challenges in operation,reliability,and energy loss in renewable energy connection,DC load power utilization and a number of other aspects.However,the definition of the LVDCSUS is still not clear even though many demonstration projects have been put into planning and operation.In order to provide a clear description of LVDCSUS,first,the characteristics of LVDCSUS are illustrated in this paper to show the advance of the LVDCSUS.Second,the potential application scenarios of LVDCSUS are presented in this paper.Third,application of LVDCSUS technologies and some demonstration projects in China are introduced.Besides the development of the LVDCSUS,key technologies,including but not limited to planning and design,voltage levels,control strategies,and key equipment of LVDCSUS,are discussed in this paper.Finally,future application areas and the research orientations of LVDCSUS are analyzed.展开更多
基金This work was funded by a number of scientific research programs,including grants from the National Key Research and Development Program of China,titled‘Evaluation and Optimal Target Selection of Deep Geothermal Resources in the Igneous Province in South China’(Project No.2019YFC0604903)‘Analysis and Geothermal Reservoir Stimulation Methods of Deep High-temperature Geothermal Systems in East China’(Project No.2021YFA0716004)+2 种基金a grant from the Joint Fund Program of the National Natural Science Foundation of China and Sinopec,titled‘Deep Geological Processes and Resource Effects of Basins’(Project No.U20B6001)two grants from the Sinopec Science and Technology Research Program,titled'Single well evaluation of Well Fushenre 1 and study on the potential of deep geothermal resources in Hainan'(Project No.P23131)‘Siting and Target Evaluation of Deep Geothermal Resources in Key Areas of Southeastern China’(Project No.P20041-1).
文摘The part of China,east of the Hu Huanyong Line,is commonly referred to as eastern China.It is characterized by a high population density and a well-developed economy;it also has huge energy demands.This study assesses and promotes the large-scale development of geothermal resources in eastern China by analyzing deep geological structures,geothermal regimes,and typical geothermal systems.These analyses are based on data collected from geotectology,deep geophysics,geothermics,structural geology,and petrology.Determining the distribution patterns of intermediate-to-deep geothermal resources in the region helps develop prospects for their exploitation and utilization.Eastern China hosts superimposed layers of rocks from three major,global tectonic domainsd namely Paleo-Asian,Circum-Pacific,and Tethyan rocks.The structure of its crust and mantle exhibits a special flyover pattern,with basins and mountains as well as well-spaced uplifts and depressions alternatively on top.The lithosphere in Northeast China and North China is characterized by a thin,low density crust and mantle,whereas the lithosphere in South China has a thin,low density crust and a thick,high density mantle.The middle and upper crust contain geobodies with high conductivity and low velocity,with varying degrees of development that create favorable conditions for the formation and enrichment of geothermal resources.Moderate-to-high temperature geothermal resources are distributed in the MesozoiceCenozoic basins in eastern China,although moderate temperature geothermal resources with low abundance dominate.Porous sandstone reservoirs,karstified fractured-vuggy carbonate reservoirs,and fissured granite reservoirs are the main types of geothermal reservoirs in this region.Under the currently available technical conditions,the exploitation and utilization of geothermal resources in eastern China favor direct utilization over large-scale geothermal power generation.In Northeast China and North China,geothermal resources could be applied for large-scale geothermal heating purposes;geothermal heating could be applied during winter along parts of the Yangtze River while geothermal cooling would be more suitable for summer there;geothermal cooling could also be applied to much of South China.Geothermal resources can also be applied to high value-added industries,to aid agricultural practices,and for tourism.
文摘China is one of the countries where there is abundant glacial water rears and glaciers exist in a vast area of mountainous regions. In this paper, a prehensive discusion is made for the characteristics of glacial water resource, the chewical properties of matwater and the prospects of future utilization in China. It has found that the gladal water resource is a water resource system based on the effect of a solid water reservoir. Its degree of mineralization is low and it almost does not have any pollution. In particular glacial water is high quality fresh water resource in the inland arid region. It is necesary to reconfirm the value of this water and conduct further studies on the fundamentals of its application in order to ratiedly exploit, utilze and preserve the glacial water resource.
文摘The utilization of steel slag has been a worldwide issue for a long time. Attention is increasingly being paid to the technological innovation and development of steel slag. Aiming at the development of environmentally friendly steel slag concrete materials and their use in a recyclable economy ,Baosteel has recently been conducting research on and using many new building materials, including steel slag powder concrete, steel slag pervious concrete, steel slag counter weight concrete and so on. In this way, steel slag has been turned from a kind of solid waste into a value-added material. The technology of steel slag utilization has been enriched and developed,while a new model of using Baosteel steel slag in a recyclable economy has also been explored and practised.
文摘With rapid increase of distributed solar power generation and direct current(DC)based loads such as data centers,electric vehicles(EVs),and DC household appliances,the development trend of the power system is changed from conventional alternate current(AC)to DC.Traditional AC power systems can scarcely meet the development demand of new DC trends,especially since both the generation side and load side are comprised of DC-based electronic power components.With this background,low voltage direct current supply and utilization system(LVDCSUS)has attracted more and more attention for its great advantages over an AC grid to overcome challenges in operation,reliability,and energy loss in renewable energy connection,DC load power utilization and a number of other aspects.However,the definition of the LVDCSUS is still not clear even though many demonstration projects have been put into planning and operation.In order to provide a clear description of LVDCSUS,first,the characteristics of LVDCSUS are illustrated in this paper to show the advance of the LVDCSUS.Second,the potential application scenarios of LVDCSUS are presented in this paper.Third,application of LVDCSUS technologies and some demonstration projects in China are introduced.Besides the development of the LVDCSUS,key technologies,including but not limited to planning and design,voltage levels,control strategies,and key equipment of LVDCSUS,are discussed in this paper.Finally,future application areas and the research orientations of LVDCSUS are analyzed.
