Yuan D.D.,Northeast Petroleum University |
Yuan B.B.,Harbin Boiler Company Ltd. |
Song H.,Northeast Petroleum University |
Niu R.X.,Northeast Petroleum University |
Liu Y.X.,Northeast Petroleum University
Advanced Materials Research | Year: 2014
In the one compartment electrochemical cell equipped with platinum electrodes electrochemical fixation carbon dioxide was conducted under ambient conditions. Ionic liquid BMimBr is supporting electrolyte. The aimed product dimethyl carbonate was electrosynthesized in a dialkylimidazolium ionic liquids-propylene oxide-methanol system under normal temperature and pressure. The result indicated that the highest yield of 37.8% was obtained in the condition of working temperature 30 °C, electrolytic voltage 5.5 V, the mass of CH3OH 0.484 mol, propylene oxide 0.052 mol and bmimBr 0.059 mol. © (2014) Trans Tech Publications, Switzerland.
Fengjun W.,Zhejiang University |
Ying H.,Harbin Boiler Company Ltd.
ICOPE 2015 - International Conference on Power Engineering | Year: 2015
Harbin boiler company (HBC) started the development of technologies for high-efficiency ultra-supercritical boilers in 2012 using its technologies and extensive operation experiences of many ultra-supercritical boilers. These technologies were applied to efficiently reduce the CO2 emission and operating cost of thermal power plants. In 2014, Huaneng Changxing 660MW high-efficiency ultra-supercritical boiler started operation, its unit efficiency was 46.035%, net coal consumption rate was ∼275g/kwh. Both values exceeded other standard ultra-supercritical boilers. As the boiler supplier, HBC is fully responsible for the boiler general performance design, manufacturing and commissioning supervision. This article presents the general conditions, design features and reliability run operating data with high-efficiency ultra-supercritical parameters of this project. © 2015 The Japan Society of Mechanical Engineers.
Wang Y.,Xian Jiaotong University |
Wang J.,Xian Jiaotong University |
Jia P.,Harbin Boiler Company Ltd.
Heat Transfer Engineering | Year: 2011
A novel simulation model is developed for predicting the performance of forced convection heat transfer in the porous metal foam. Based on the physical geometry of the Gibson-Ashby constitutive model, the theoretical model proposed is able to predict the mechanical behaviors and thermal physical properties of porous materials simultaneously. The theoretical predictions of the overall heat transfer coefficient and pressure drop were compared with available experimental data for two different porous foam tubes. The first tube has a porous diameter of 0.6mm and porosity of 0.402, and the other tube has a diameter of 1.6mm and porosity of 0.462. The results show that the relative deviation of the flow pressure drop between the prediction and the experimental data are in the range from 5% to10% while the relative deviation of the overall heat transfer coefficient is about 20%. These deviations are acceptable for applications in engineering. So the feasibility of the Gibson-Ashby constitutive model to be used to predict the performance of flow resistance and convective heat transfer in porous foam ducts is satisfactorily validated. Copyright © Taylor and Francis Group, LLC.
Yang Q.,Harbin Boiler Company Ltd. |
Tan S.-P.,Harbin Boiler Company Ltd.
Kang T'ieh/Iron and Steel | Year: 2014
The microstructure stability of alloy 617, which is one of candidate materials for high temperature component of advanced ultra supercritical coal fire generating unit, was investigated after aging 1000, 2000, 3000 and 5000h at 750°C. Optical microscope, scanning electron microscope, transmission electron microscope and X ray diffraction were used to analyze the intergranular and intragranular precipitates after aging. The results show that M23C6 carbide precipitates at grain boundaries; while the intragranular precipitate of γ' is dispersoid distribution, and the size increases with aging time. The strength of test material increases after 1000 h aging, and then the trend changes to smooth with aging time. And toughness of the test material decreases with aging time.
Li G.-L.,Dalian University of Technology |
Li C.-Y.,Harbin Boiler Company Ltd. |
Chen X.-Y.,Dalian University of Technology |
Zhang X.-W.,Dalian University of Technology
Wuli Xuebao/Acta Physica Sinica | Year: 2013
Choosing the current of the front inductor of SEPIC converter as controlled object, the resonant parametric perturbation is applied to control the chaos in SEPIC converter. Through the small perturbations of circuit parameter, chaos control of SEPIC converter is realized, and the results are analyzed by the time domain waveform, power spectrum, and bifurcation diagram. Finally, the results of the circuit experiment demonstrate that chaos control of SEPIC converter can be realized by the resonant parametric perturbation method. © 2013 Chinese Physical Society.