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The design and practice of giant hydro turbine generating units of Three Gorges ProjectShao Jianxiong

Shao Jianxiong,Liu Jingwang,Yuan Dafu

Strategic Study of CAE 2011, Volume 13, Issue 7, Pages 104-110

Abstract: Three Gorges Project (TGP), the main technical problems that should be considered in the design of hydroturbine generating units are analyzed.The key technical researches performed are summarized and the parameters of hydro turbine generatingThe unit operation results indicate that the performance of the hydro turbine generating units is excellentTherefore, it is verified effectively that the general technical design of giant hydro turbine generating

Keywords： Three Gorges Project 700 MW hydro turbine generating unit unit capacity design and research operation

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Structure improvement and strength finite element analysis of VHP welded rotor of 700°C USC steam turbine

Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG

Frontiers in Energy 2016, Volume 10, Issue 1, Pages 88-104 doi: 10.1007/s11708-015-0387-1

Abstract: structure strength design and finite element analysis method for very high pressure (VHP) rotors of the 700°C ultra-super-critical (USC) steam turbine are presented.parameters of blade stages of VHP welded rotors as well as the start and shutdown curves of the steam turbineThe results show that the strength design of improved structure of the VHP welded rotor of the 700°CUSC steam turbine is safe at the steady condition and during the transient start or shutdown process.

Keywords： 700°C ultra-super-critical unit steam turbine very high pressure rotor structure strength design strength

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1000 MW ultra-supercritical turbine steam parameter optimization

FENG Weizhong

Frontiers in Energy 2008, Volume 2, Issue 2, Pages 187-193 doi: 10.1007/s11708-008-0030-5

Abstract: The 2 × 1000 MW ultra-supercritical steam turbine of Shanghai Waigaoqiao Phase III project, which usesAt high circulating water temperature, the turbine overload valve is kept closed when the unit load islower than 1000 MW while at other circulating water temperatures the turbine can run in sliding pressureoperation when the unit load is higher than 1000 MW and the pressure is lower than 27 MPa This increasesthe unit operation efficiency.

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MW pumped-storage power units

Jinyuan SHI , Yu YANG , Zhicheng DENG ,

Frontiers in Energy 2009, Volume 3, Issue 3, Pages 337-340 doi: 10.1007/s11708-009-0032-y

Abstract: parameters are given together with analysis results concerning the reliability growth of 300MWoperation by the pumped-storage power companies are effective and that the reliability of the 300MW

Keywords： pump-storage power unit availability reliability growth reliability prediction

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Exergy analysis and simulation of a 30MW cogeneration cycle

Nikhil Dev, Samsher, S. S. Kachhwaha, Rajesh Attri

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2, Pages 169-180 doi: 10.1007/s11465-013-0263-9

Abstract: Cogeneration cycle is an efficient mean to recover the waste heat from the flue gases coming out of gas turbineFrom the results it is found that turbine outlet temperature (TIT) of 524°C is uniquely suited toinlet air temperature (IAT) and water pressure at heat recovery steam generator (HRSG) inlet on the 30 MW

Keywords： Cogeneration cycle air compressor HRSG gas turbine regenerator CR IAT

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Availability growth models and verification of power equipment

Jinyuan SHI, Jiamin XU

Frontiers in Energy 2021, Volume 15, Issue 2, Pages 529-538 doi: 10.1007/s11708-019-0624-0

Abstract: The general availability growth models for large scale complicated repairable system such as electric generatingAvailability growth models for electric generating units, power station auxiliaries, and transmissioninstallations are given together with verification examples for availability growth models of 320–1000 MWnuclear power units and 1000 MW thermal power units, 200–1000 MW power station auxiliaries, and 220–verification results for operation availability data show that the maintenance coefficients for electric generating

Keywords： repairable system power equipment electric generating unit power station auxiliary transmission and distribution

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The Analysis on the Air-exciting-vibration Force of Steam Turbine

Chai Shan,Zhang Yaoming,Qu Qingwen,Zhao Youqun,Yao Fusheng

Strategic Study of CAE 2001, Volume 3, Issue 4, Pages 68-72

Abstract:

Based on the hydro-dynamics, the computing formulas for air-exciting-vibration force are derived forstraight blade, short twist blade, long twist blade and the control stage of steam turbine in uniformair-exciting-vibration force can be directly calculated based on the design parameters and air-flow parameters of steam turbine

Keywords： steam turbine air-exciting-vibration force hydro-dynamics

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Feasibility Study on Design and Construction of Concrete Filled Steel Tubular Arch Bridge with a Span of 700m

Zheng Jielian,Wang Jianjun,Mou Tingmin,Feng Zhi,Han Yu,Qin Dayan

Strategic Study of CAE 2014, Volume 16, Issue 8, Pages 33-37

Abstract: filled steel tubular (CFST) arch bridge, a feasibility study on design and construction techniques of 700m-spanThe results showed that there are no technical hurdles to build 700m-span CFST arch bridges.economical efficiency, safety and other factors, CFST arch bridge is a strong competitor when building a 700m-span

Keywords： bridge engineering span of 700m grade concrete filled steel tubular(CFST) arch bridge design construction

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Investigation of the hydro-mechanical behaviour of compacted expansive clay

Yujun CUI, An Ninh TA, Anh Minh TANG, Yingfa LU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2, Pages 154-164 doi: 10.1007/s11709-010-0019-0

Abstract: The hydro-mechanical behaviour of compacted expansive Romainville clay was investigated.

Keywords： Romainville clay suction control oedometer test large infiltration task hydro-mechanical behaviour

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Prediction of hydro-suction dredging depth using data-driven methods

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 652-664 doi: 10.1007/s11709-021-0719-7

Abstract: solubility optimization (HGSO) methods, and simple equations methods were applied to simulate the maximum hydro-suction

Keywords： sedimentation water resources dam engineering machine learning heuristic

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Uncertainty assessment in hydro-mechanical-coupled analysis of saturated porous medium applying fuzzy

Farhoud KALATEH, Farideh HOSSEINEJAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2, Pages 387-410 doi: 10.1007/s11709-019-0601-z

Abstract: on dynamic response of porous media, and also to discrete the coupled dynamic equations known as - hydro-mechanical

Keywords： fuzzy finite element method saturated soil hydro-mechanical coupled equations coupled analysis uncertainty

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Design of damping valve for vehicle hydro pneumatic suspension

DONG Mingming, HUANG Hua, GU Lian

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1, Pages 97-100 doi: 10.1007/s11465-008-0014-5

Abstract: According to the design features of a hydro pneumatic spring, the necessity of a separate damping valveThe design method and damping valve structure are useful guides for hydro pneumatic suspension, especially

Keywords： ability pneumatic necessity flowrate equivalent linearization

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Hydro-pyrolysis of lignocellulosic biomass over alumina supported Platinum, Mo

Songbo He, Jeffrey Boom, Rolf van der Gaast, K. Seshan

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1, Pages 155-161 doi: 10.1007/s11705-017-1655-x

Abstract: In-line hydro-treatment of bio-oil vapor from fast pyrolysis of lignocellulosic biomass (hydro-pyrolysiscan be completely and partially hydrogenated to form hydrocarbons, an ideal fossil fuel blend, in the hydro-treatedhydrocarbon formation (ca. 60%), showing the feasibility of using the cheap non-noble catalysts for hydro-pyrolysis

Keywords： bio-oil pyrolysis hydro-deoxygenation (HDO) non-noble metal catalysts hydro-treatment

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New Perspectives of Seismic Safety Evaluation in Urban Planning：The Discovery of “Macroseism Generating

Li Ping,Yang Mei´e,Zhao Dongzhi

Strategic Study of CAE 2007, Volume 9, Issue 7, Pages 1-6

Abstract: active faults in a time scale as long as tens or hundreds of years, so we call them the macroseism generatingThe macroseism generating fault is not merely a line but has a certain width from several meters to tensThe discovery of macroseism generating fault enables us to deal with the three factors, i.e. the timequot; in urban planning, correction and amendment are necessary as for whether or not the macroseism generating

Keywords： urban planning active fault macroseism generating fault seismic amplifying effect of macroseism generating

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Antioxidative potential of metformin: Possible protective mechanism against generating OH radicals

Huibin Guo, Ning Wang, Xiang Li

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1313-2

Abstract: Abstract • Metformin consumes O2−• and OH• induced by PM are proposed. • OH• dominated the oxidation of metformin compared with O2−• • Metformin can prevent the harm of ROS induced by PM to human health. • Antioxidative potential of metformin was first proposed to provide measures. Exposure to particulate matter (PM) can lead to the excessive accumulation of reactive oxygen species (ROS), which causes oxidative stress and endangers human health. In this study, the effects of metformin on PM-induced radicals were investigated, and the antioxidation reaction mechanism of metformin was analyzed by the density functional theory (DFT) method. The corresponding results revealed that the consumption rate of dithiothreitol (DTT) increased as the metformin concentration (0–40 mmol/L) increased under exposure to PM active components. Moreover, the OH radical content decreased as the metformin concentration increased. This result may be related to the consumption of PM-induced OH radicals by metformin, which promotes the DTT consumption rate. Additionally, because the initiation reaction has a high barrier, the oxidation reaction rate between metformin and •O2− is not very fast, although various catalysts may be present in the human environment. Importantly, we found that the barrier of metformin induced by OH radicals is only 9.6 kcal/mol while the barrier of metformin induced by oxygen is 57.9 kcal/mol, which shows that the rate of the •OH-initiated oxidative reaction of metformin is much faster and that this reaction path occurs more easily. By sample analysis, the mean OH radical generation was 55 nmol/min/g (ranging from 5 to 105 nmol/min/g) on haze days and 30 nmol/min/g (ranging from 10 to 50 nmol/min/g) on non-haze days. Moreover, OH radical generation was higher on haze days than on neighboring non-haze days. Taken together, all data suggest that metformin could consume the PM-induced radicals, such as OH radicals and •O2−, thereby providing health protection.

Keywords： Antioxidative potential Metformin Mechanism OH radical Health protection.