The human capital in the rural and pastoral area in Tibet is scarce at present and the investment in human capital faces many difficulties. It is urgent to optimize the education structure, intensify professional trai...The human capital in the rural and pastoral area in Tibet is scarce at present and the investment in human capital faces many difficulties. It is urgent to optimize the education structure, intensify professional training, cultivate the transferring of labor force and pay attention to the child care. The fundamental measure is to establish the concept of "being equipped with the ability to study, work and to be rich", and is to carry out "fundamental education and agricultural education".展开更多
Turbine generators play a pivotal role in efficiently converting gas internal energy into electrical energy,finding extensive applications in diverse green energy and power equipment.The adoption of a high-speed direc...Turbine generators play a pivotal role in efficiently converting gas internal energy into electrical energy,finding extensive applications in diverse green energy and power equipment.The adoption of a high-speed direct-drive structure eliminates mechanical losses associated with the reducer between the turbine and generator,enhancing system efficiency and compactness.However,this configuration introduces challenges in design and manufacturing.This article explores the various application scenarios of high-speed direct-drive power generation systems,examining their roles in organic Rankine cycle power generation,gas turbine power generation,supercritical CO_(2) power generation,vehicle exhaust turbine power generation,and natural gas pressure reduction power generation.Considering the high-speed,high-pressure,high-temperature,and high-efficiency challenges in turbine power generation systems,the key technologies are reviewed including high-speed bearings,rotor dynamics,high-speed motors,high-frequency variable frequency technology,sealing technology,axial force adjustment,thermal management,turbine aerodynamic design,and system control strategies.The article further delves into the current research and development status of high-speed direct-drive power generation systems across different application scenarios.Finally,the article presents prospects for the future development of efficient,reliable and widely adaptable high-speed direct-drive generators,offering valuable insights for researchers and practitioners in the field.展开更多
基金Supported by National Social Science Fund(12XMZ027)Social Science and Humanity Study of Tibet Project(12XZJA790001,12XZJC790002)Study Project of Social Science and Humanity in Tibet(zjrwy11)
文摘The human capital in the rural and pastoral area in Tibet is scarce at present and the investment in human capital faces many difficulties. It is urgent to optimize the education structure, intensify professional training, cultivate the transferring of labor force and pay attention to the child care. The fundamental measure is to establish the concept of "being equipped with the ability to study, work and to be rich", and is to carry out "fundamental education and agricultural education".
基金supported by the National Major Science and Technology Project (2019-Ⅱ-0009-0029)the 2022 Jiangsu Province Carbon Peak Carbon Neutral Science and Technology Innovation Special Major Innovation Carrier Construction Project (BM2022001)+2 种基金the National Natural Science Foundation of China(52202324)supported by the Hundred Talents Program of the Chinese Academy of Sciencesthe Nanjing Future Energy System Research Institute independently deploys research projects (E3550101)
文摘Turbine generators play a pivotal role in efficiently converting gas internal energy into electrical energy,finding extensive applications in diverse green energy and power equipment.The adoption of a high-speed direct-drive structure eliminates mechanical losses associated with the reducer between the turbine and generator,enhancing system efficiency and compactness.However,this configuration introduces challenges in design and manufacturing.This article explores the various application scenarios of high-speed direct-drive power generation systems,examining their roles in organic Rankine cycle power generation,gas turbine power generation,supercritical CO_(2) power generation,vehicle exhaust turbine power generation,and natural gas pressure reduction power generation.Considering the high-speed,high-pressure,high-temperature,and high-efficiency challenges in turbine power generation systems,the key technologies are reviewed including high-speed bearings,rotor dynamics,high-speed motors,high-frequency variable frequency technology,sealing technology,axial force adjustment,thermal management,turbine aerodynamic design,and system control strategies.The article further delves into the current research and development status of high-speed direct-drive power generation systems across different application scenarios.Finally,the article presents prospects for the future development of efficient,reliable and widely adaptable high-speed direct-drive generators,offering valuable insights for researchers and practitioners in the field.