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Zhang Y.,Harbin Institute of Technology | Zhang Y.,University of Nottingham | Gao J.,Harbin Institute of Technology | He M.,Harbin Boiler Company Ltd. | And 4 more authors.
Energy and Fuels | Year: 2017

Although ammonia-based CO2 capture has attracted global research attention, several inherent issues with this technology remain to be resolved. To address these problems, a new design for carbon capture using ammonia is proposed on the basis of anti-solvent crystallization, also known as precipitation crystallization. The crystallization of a low carbonized absorbent was found to be enhanced in the crystallizer using an anti-solvent process, which can maintain a high absorption rate and simultaneously prevent crystallization from occurring in the absorption tower. Energy consumption for sorbent regeneration is reduced by regenerating the crystal product rather than the rich solution. Energy-cascade utilization is an effective way to improve the use of energy. In this work, steam was used to drive a heat pump that extracts energy from discharged flue gas from a wet flue gas desulfurization system in a power plant to enable the recovery of low-temperature residual energy; this energy can be used in the crystal regeneration process, thereby further reducing the energy required for regeneration. Aspen Plus (version 8.4) software was adopted to simulate the flue gas condensation, heat-pump circulation, and steam drive subsystems. The simulation results showed that 10 heat pumps (6.04 MW) can meet the regeneration energy requirement of the CO2 capture process in a 300 MW coal-fired unit and recycle 40.6 MW of low-temperature heat. The extraction steam requirement is low, which reduces the impact on power generation. © 2017 American Chemical Society.

Hu T.,Xi'an Jiaotong University | Jia P.,Harbin Boiler Company Ltd. | Wang Y.,Xi'an Jiaotong University | Hao Y.,Xi'an Jiaotong University
Solar Energy | Year: 2017

A numerical simulation model is employed to evaluate the convective thermal loss of a one-point focusing central cavity receiver with a trapezoidal cross-section cubic structure in a solar tower power plant. Due to being laid at the top of the solar tower with a height of several decameters, the cavity receiver is suffering from low temperature and cold wind from its special ambient environment. Consequently, the effect of the natural convection on its thermal performance could not be neglected while the one of the turbulent flow field inside the cavity receiver entering from its aperture is comparably significant. Therefore, a three-dimensional turbulent flow model is established to calculate mixed convection heat loss which is usually used to evaluate the thermal performance. Under the certain wall temperature condition inside the receiver, the receiver laid inclination, the wind incidence angle and wind speed around the receiver are particularly considered in the proposed convection heat loss model. The simulation results show that the trend of mixed convection heat loss changing with the laid inclination is similar to that of natural convection when wind speed is relatively low. The maximum mixed convection heat loss happened in the case of wind direction α = 90°, and minimum at α = 0°. Under some certain windy condition, mixed convection heat loss may be lower than the natural convection value. In order to explain the variation of mixed convection heat loss, the profiles of flow velocity vector field and the temperature contours around the receiver are illustrated accordingly for each case. Furthermore, the flow pattern and turbulent vortex for the flow field are also presented. Finally, a heat transfer coefficient correlation considering receiver laid inclinations, wind speed and wind incidence angle was proposed to estimate the convection heat loss. © 2017

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.

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.

Man Z.,Harbin Institute of Technology | Rushan B.,Harbin Institute of Technology | Zezhong Y.,Harbin Boiler Company Ltd. | Xiaoguo J.,Harbin Boiler Company Ltd.
Powder Technology | Year: 2010

It is important to properly understand and calculate the distributions of the heat flux and the heat transfer coefficient in a furnace for designing a circulating fluidized bed (CFB) boiler, especially for one with supercritical parameters. An experimental study of the heat transfer in a commercial 300. MWe CFB boiler was conducted in this work. The heat flux from the bed to the waterwall was measured by a heat flux meter at four different heights. The influence of suspension density and bed temperature was analyzed by measuring the pressure profile and temperature profile in the furnace. In addition a numerical modeling study on the two phase flow in the furnace was carried out. The results indicate that the density of the solids suspension was non-uniform in the cross section at a certain height, and decreased gradually with increasing furnace height. Consequently, the distribution of heat flux in the horizontal plane was non-uniform and decreased along the height of the furnace. The heat flux showed a decreasing trend near the center. © 2010 Elsevier B.V.

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 S.,Harbin Boiler Company Ltd. | Liu G.-X.,Harbin Boiler Company Ltd. | Tan S.-P.,Harbin Boiler Company Ltd.
Kang T'ieh/Iron and Steel | Year: 2016

The relationship between the precipitation of M23C6 carbide and mechanical properties was investigated after the 650℃ aging process of Tempaloy AA-1. The microstructure and corresponding fracture surface under impact and tensile tests of the Tempaloy AA-1 with 0, 500, 1 000, 5 000 and 8 000 h aging duration were analyzed by scanning electron microscopy and transmission electron microscopy. The results show that the ocuurrence and distribution at grain boundary of M23C6 carbide were found, as the aging time of Tempaloy AA-1 increases. Due to the grain boundary strengthening, the Tempaloy AA-1 aged for 500 h showed a maximum yield strength and tensile strength. The obvious growth of M23C6 carbide at grain boundaries with increasing aging time to 8 000 h made grain boundary strengthening become weaken, resulting in a slight decrease of strength. There is no obvious reunion of M23C6 carbide after long time aging, as a result, the Tempaloy AA-1 material still has good ageing impact toughness. The good mechanical properties and impact toughness after aging is due to the good microstructure stability of Tempaloy AA-1 after long time aging. © 2016, Chinese Society for Metals. All right reserved.

Zhang D.-J.,Harbin Boiler Company Ltd. | Yin X.-M.,Harbin Boiler Company Ltd.
Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering | Year: 2010

Based on the existed domestic ultra-supercritical boiler technology, the necessity of developing and designing large capacity ultra-supercritical lignite-fired boiler is discussed. The basic design scheme of a 1000 MW ultra-supercritical lignite-fired boiler is presented, including the selection of coal and steam parameters, furnace type and main characteristic parameters, furnace waterwall, combustion and coal-pulverizing system, superheater, reheater and economizer system, temperature controlling method, start-up system, steel of pressure parts, etc.

Wang Y.,Xi'an Jiaotong University | Wang J.,Xi'an 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.

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