Sun L.,Hunan Electrical Power Research Institute |
Li Z.,China New Era International Engineering Corporation |
Jiang Z.,Hunan Electrical Power Research Institute |
Li Q.,Hunan Electrical Power Research Institute |
Fang Z.,Hunan Electrical Power Research Institute
Gaoya Dianqi/High Voltage Apparatus | Year: 2015
The power supply for ultra-high voltage (UHV)AC contamination test is a main equipment in artificial contamination and icing tests at AC UHV level or below, so the test reliability depends on the selection of its parameters. The authors put forward a method for calculating key parameters of the power supply, and analyze the influences of the key parameters on the artificial contamination test at AC UHV level or below. Calculation results show that: for different test voltage level, protective resistor with corresponding resistance should be selected in order to obtain satisfactory results of the AC contamination test; the withstand short circuit capacity of the transformer should be at least 9 times of its rated current for UHV AC contamination test, and at least 6 times for EHV or lower voltage contamination test. ©, 2015, Xi'an High Voltage Apparatus Research Institute. All right reserved.
Na H.,China New Era International Engineering Corporation |
Ding Z.-P.,China New Era International Engineering Corporation |
Sun J.-F.,China New Era International Engineering Corporation |
Yang J.-Q.,China New Era International Engineering Corporation |
And 3 more authors.
Gaoya Dianqi/High Voltage Apparatus | Year: 2012
For testing the high voltage direct current (HVDC) circuit breakers of HVDC distribution system in laboratory, the working conditions and characteristics of HVDC distribution system are analyzed, and two test circuits for the HVDC circuit breakers are designed according to the grid parameters and working condition requirements, as well as PSCAD simulations. The design of one of the test circuits, named direct test circuit, is described in detail and calculated.
Liu M.,Xi'an Jiaotong University |
Fu H.,Xi'an Jiaotong University |
Miao G.-Y.,China New Era International Engineering corporation |
Wang J.-S.,Xi'an Jiaotong University |
And 2 more authors.
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2016
Lignite pre-drying is an effective way to improve the plant thermal efficiency of lignite-fired power system. Heat pump drying is a kind of energy conservation drying technology. Therefore, the lignite-fired power system integrated with heat pump drying was proposed in this paper. The preliminary system was designed, and theoretical models of energy and exergy analyses were then developed. With a reference case of 600 MW conventional lignite-fired power plant as the benchmark, the energy saving potential of lignite-fired power system integrated with heat pump drying was calculated. Results show that the decrease of exergy destruction in combustion is the essence of energy saving, and the standard coal consumption rate of power supply could be decreased by 11.54 g·kWh-1 because of heat pump drying. The influence of main parameters on system energy efficiency were analyzed, and results show that the decrease of the standard coal consumption rate of power supply increases with the dryer thermal efficiency, the second-law efficiency of heat pump and the pre-drying degree of lignite. © 2016, Science Press. All right reserved.
Xue J.,Xi'an University of Technology |
Wang G.,Xi'an University of Technology |
Liu H.,China New Era International Engineering Corporation |
Ren R.,Xi'an University of Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2014
In order to investigate the seismic behaviors of steel reinforced recycled concrete (SRRC)frame structure, a 1: 2.5 scale model of three-story and two-bay SRRC frame was designed. The low cyclic reversed loading test on this model was carried out, its failure process and pattern were observed, its load-displacement hysteretic loops and skeleton curves were acquired, and its seismic behaviors, such as load carrying capacity, stiffness, ductility, energy dissipation capacity were analyzed. The result of test shows that, the failure mode of the SRRC frame belongs to 'strong column week beam' failure mechanism, its maximum displacement angle is 1/22, and the average displacement ductility coefficient of the frame is 4.3. All these show the good deformation capacity and collapse resistance capacity. ©, 2014, Science Press. All right reserved.
Jiao Y.F.,Tongji University |
Jiao Y.F.,Henan University of Science and Technology |
Hou Y.L.,China New Era InterNational Engineering Corporation |
Wei X.Y.,Tongji University
Advanced Materials Research | Year: 2011
In this paper, the finite element program LS-DYNA was used to simulate the dynamic response of RC column with different constraints subjected to blast pressure. Through analyzing the five group columns with fixed end as well as one end fixed and one end simply supported, the maximum middle displacement and its relation with T/T? were obtained. Thereby the dynamic factor of the column under blast pressure was acquired. Consequently the displacement response spectrum curve of the column was drawn. The results provide reference value to the design and protection of the RC column. © (2011) Trans Tech Publications, Switzerland.
Su G.,CAS Research Center for Eco Environmental Sciences |
Huang L.,CAS Research Center for Eco Environmental Sciences |
Liu S.,CAS Research Center for Eco Environmental Sciences |
Liu S.,China New Era International Engineering Corporation |
And 3 more authors.
Catalysis Science and Technology | Year: 2015
Dioxin-like chlorinated aromatics and NOx are toxic compounds that are typically co-released from thermal industrial processes. Nevertheless, there are few studies reporting their synergetic disposal technology. A designed two-step coprecipitation method was developed to synthesize a novel three-dimensional ball-like Ce-Ti-Al composite oxide (Ce0.2TiAlαOx) micro/nanomaterial to simultaneously dispose 1,2,4-trichlorobenzene (1,2,4-TrCBz, as the model compound) and NO in a fixed-bed flow reactor at 300 °C. The prepared Ce0.2TiAlαOx micro/nanomaterial exhibited superior activities to Ce0.2TiOx. This featured the relative increase of 1,2,4-TrCBz degradation and NO conversion efficiencies by 8.0-14.1% and 5.2-33.3%, respectively. NO had a positive effect on the degradation of 1,2,4-TrCBz and induced a significant increase in the activity of the Ce0.2TiAlαOx catalysts. In the presence of NO, 1,2,4-TrCBz was slightly dechlorinated in a stepwise manner to monochlorobenzene and oxidized to small molecules such as formic acid. The oxidative degradation pathway of 1,2,4-TrCBz over Ce0.2TiAlαOx was proposed to proceed via the Mars-van Krevelen mechanism that accounts for the high mobility of the reactive oxygen species, such as O2-, O2-, and O-, the unique redox properties of CeO2, the positive effect of NO, and the interactive effect among the different material components. © The Royal Society of Chemistry 2015.
Yan X.,Xi'an University of Architecture and Technology |
Li Q.,Xi'an University of Architecture and Technology |
Gao C.,Chinese Research Institute of Highway |
Wang L.,China New Era International Engineering Corporation
Advanced Materials Research | Year: 2012
Taking a double span-swallows-type CFST (concrete-filled steel tubular) trussed arch bridge as an engineering example; a spatial finite element analysis model is established to calculate its dynamic characteristic. The seismic responses in different earthquake input directions are calculated based on the elastic dynamic time history method. Results show that: the out-plane stability of the bridge is weaker than that of the in-plane; the torsion resistance ability of the bridge deck is smaller than that of the arch ribs; the axial force-Fx, shear force-Fz and bending moment-My of the bridge are mainly controlled by longitudinal seismic forces, whereas the shear forces-Fy, bending moment-Mz and torque-Mx are mainly controlled by transverse seismic forces; vertical seismic force has a considerable effect on internal forces of the bridge, so it can not be ignored in seismic design.
Gao M.,Xi'an University of Architecture and Technology |
Li H.,Xi'an University of Architecture and Technology |
Tang H.,Xi'an University of Architecture and Technology |
Cao Q.,China New Era International Engineering Corporation
Advanced Materials Research | Year: 2012
Based on the analysis of the economic evaluation of green building, taking references of 〈 Evaluation standards of green building〉 (GB/T 50378-2006), indicators reflecting the economy of green building are selected through expert scoring method and fuzzy statistics method. Furthermore, a comprehensive evaluation model is established based on principle of fuzzy mathematics through the application of AHP aiming at determining the index weight. All above is to provide a wider perspective for the economic evaluation of green building.
Hou Y.,China New Era International Engineering Corporation |
Jiao Y.,Tongji University |
Jiao Y.,Henan University of Science and Technology |
Wei X.,Chang'an University
Advanced Materials Research | Year: 2011
The failure of the reinforced concrete (RC) column on the ground floor may result in progressive collapse of the whole building. In the paper, the finite element program LS-DYNA is used to simulate the dynamic response of RC column with different constraints subjected to blast pressure. A three dimensional solid model is established for the RC column. A brittle damage model is applied to simulate the concrete. The lateral displacement and failure mode of RC column with different scaled distances are investigated and discussed. It can be found that the pressure nephogram and x-direction displacement of fixed end column under different scaled distance have the obvious symmetry. Moreover, both the maximum pressure and x-direction displacement of one end fixed and one end simply supported column are bigger than fixed end column with the same scaled distance. © (2011) Trans Tech Publications.
Huang W.,Xi'an University of Architecture and Technology |
Ma G.,Xi'an University of Architecture and Technology |
Zhang C.,Xi'an University of Architecture and Technology |
Zhang Q.,Xi'an University of Architecture and Technology |
Zhang Q.,China New Era International Engineering Corporation
Journal of Earthquake Engineering and Engineering Vibration | Year: 2013
This paper studies the seismic behavior of two ecological composite walls, the scales of which are 1: 2. A comparative study is conducted under lowly reversed cyclic lateral loading. Emphasis is put on the evaluation of the failure mechanism, bearing capacity, hysteretic loops, ductility, deterioration of strength and stiffness of ecological composite walls under seismic loads. The experiment results show that the failure modes of ecological composite walls with different construction technology are blocks-ribbed grids-end frames. This indicates that the ecological composite wall has several seismic defending lines. The equivalent viscous damping coefficients of four walls all have been obviously increased from yielding stage to failure stage, and these have great energy dissipation capacity and strong collapse resistant capacity. Based on regional difference, the appropriate technique can be selected for practical engineering.