Wang J.,Yanglong River Hydropower Development Co. |
Zhou H.,China Energy Engineering Group Co. |
Tan K.,Gezhouba Group Testing Co.
Advances in Science and Technology of Water Resources | Year: 2017
In order to improve water-cooling efficiency for massive concrete, to achieve precise control and transparent management, and to prevent and control concrete cracks, an intelligent water-cooling control system was developed. After three years of field trials of practical engineering and applicability research, key technology for stable and reliable operation under complex conditions in mass concrete construction of hydropower projects was created, and eventually the system was applied to the highest hyperbolic arch dam in the world, the Jinping-I Arm Dam. The results show that the system can realize standardization, refinement, and intelligentization of temperature control during the construction period of mass concrete, and greatly improve the efficiency of temperature control of mass concrete. © 2017, Editorial Board of Advances in Science and Technology of Water Resources, Hohai University. All right reserved.
News Article | April 18, 2017
LONDON--(BUSINESS WIRE)--Amec Foster Wheeler announces today that it has been awarded a new contract by China Energy Engineering Group Guangdong Power Engineering Co., Ltd. (“GPEC”), for the design and supply of two circulating fluidized-bed (CFB) steam generator boilers, as well as technical advisory services. Located in Attarat Um Ghudran, approximately 100km southeast of Amman, the two 235 MWe (net) CFB boilers are designed to burn 100% of Jordanian oil shale. This is a significant project for Amec Foster Wheeler with GPEC, which was selected in 2014 to perform the EPC of the $2.1 billion 554-megawatt oil shale fired power plant, Jordan’s first. This project will help Jordan utilise its substantial oil shale reserves, estimated to be approximately 30 billion tonnes, thereby reducing its reliance on imported oil and gas. It is expected to meet 10-15% of Jordan’s annual power demand. “As leading energy markets around the world aim to introduce energy-efficient and eco-friendly solutions with challenging fuels, this project is further testament to Amec Foster Wheeler's leadership and track record in CFBs, which is central to this effort. We will use our CFB technology that is successfully operating in four European plants to burn oil shale.” “This project is the first utilising Jordan’s abundant oil shale reserves. The successful cooperation between China Energy Engineering Group Guangdong Power Engineering Co., Ltd. and Amec Foster Wheeler is a giant achievement in oil shale-fired power plants. We believe that future growth of our market will generate more opportunities to achieve win-win situations.” Mr. Zhang, Project Manager and Vice-President of China Energy Engineering Group Guangdong Power Engineering Co., Ltd. International said: “We consider Amec Foster Wheeler to manufacture the best CFB boilers. Their high quality, on-time delivery, successful technology and good after-sale service meet the requirements of this project. We are looking forward to the smooth implementation of this project.” Amec Foster Wheeler (www.amecfw.com) designs, delivers and maintains strategic and complex assets for its customers across the global energy and related sectors. Employing around 36,000 people in more than 55 countries and with 2016 revenues of £5.4 billion, the company operates across the oil and gas industry – from production through to refining, processing and distribution of derivative products – and in the mining, power and process, pharma, environment and infrastructure markets. Amec Foster Wheeler has sold over 400 CFB steam generating units around the world, bringing high-value technology solutions to utilities, independent power generators and industrial clients. Our leadership position in CFB combustion has resulted from our commitment to deliver superior designs providing high efficiency, fuel flexibility and low emissions. On the 2 March 2017, Amec Foster Wheeler announced that it had signed an agreement to sell its core boiler business to Sumitomo Heavy Industries. Amec Foster Wheeler shares are publicly traded on the London Stock Exchange and its American Depositary Shares are traded on the New York Stock Exchange. Both trade under the ticker AMFW. This announcement contains statements which constitute “forward-looking statements”. Forward-looking statements include any statements related to the timing, results and success of contracts, and are generally identified by words such as “believe,” “expect,” “anticipate,” “intend,” “estimate,” “will,” “may,” “continue,” “should” and other similar expressions. Forward-looking statements are subject to various risks and uncertainties, many of which are difficult to predict and generally beyond the control of Amec Foster Wheeler, that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking statements. Amec Foster Wheeler does not undertake to update any of the forward-looking statements after this date to conform such statements to actual results, to reflect the occurrence of anticipated results or otherwise. A copy of this announcement will be made available on Amec Foster Wheeler’s website at www.amecfw.com by no later than 12 noon (London time) on the business day following publication of this announcement. For the avoidance of doubt, the contents of this website are not incorporated into and do not form part of this announcement.
Wei D.,Hohai University |
Wei D.,North China University of Water Conservancy and Electric Power |
Zhou H.,Hohai University |
Zhou H.,China Energy Engineering Group Co.
Applied Mechanics and Materials | Year: 2014
For influence factors to engineering progress in project management of fund, resource allocation and climate etc, establish a schedule control model under the minimum cost. Using genetic algorithms for analysis, obtained the earliest start time of each working procedure at minimum costs. This method can avoid the impact of human factors and provides the powerful theory support for the policy-maker. © (2014) Trans Tech Publications, Switzerland.
Qiao Y.,Tsinghua University |
Lu Z.,Tsinghua University |
Xu F.,Tsinghua University |
Li J.,China Energy Engineering Group Co.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013
Wind energy efficiency (WEE) is used to estimate the net contribution of CO2 emission reduction from wind-generated electricity, which is an essential index to measure the efficiency of a power grid to accommodate wind energy. This paper takes into account that China's power grids mainly consist of coal-fired units, and it analyzes the cost components in accommodating wind power by means of unit commitment. This paper reveals how WEE changes with the operation modes and the parameters of coal-fired units, and the wind utilization proportion both in theory and by case study. The results show that the rules, approaches, prediction needs are quite unique in a coal power plant intensive grid. In addition, theory basics of wind-coal coordinating operation is provided in this paper. © 2013 State Grid Electric Power Research Institute Press.
Zhao Z.,Zhejiang University of Technology |
Li C.,Zhejiang University of Technology |
Zhang Z.,Gezhouba Group Testing Co. |
Wang W.,Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering |
Zhou H.,China Energy Engineering Group Co.
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2016
This study investigates cracking resistance behaviors of ultra-high volume fly ash conventional dam concrete (UHVFACDC) at early age using a temperature-stress testing machine (TSTM), with a comprehensive consideration of temperature history, constraint, deformation and stress of concrete from the prospective of wholism to overcome the deficiency in the traditional methods of thermal cracking property evaluation of concrete at early age. The experimental results show that in comparison with the reference concrete, this fly ash concrete has lower hydration temperature rise, and cracking temperature and its cracking temperature drop is larger. And during hardening, it manifests a smaller coefficient of thermal expansion and a higher degree of tensile creep. All this indicates that UHVFACDC of great early-age cracking resistance is a promising type of green high-performance dam concrete. © 2016 All right reserved.
Wang W.,Jiangsu University |
Wang Y.,Jiangsu University |
Liu R.,China Energy Engineering Group Co. |
Li Y.,Lanzhou University of Technology |
And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2014
The paper aims to deal with the numerical simulation of cavitation phenomena inside the centrifugal pump and analyze the development of cavitation based on improved cavitation model, Standard k-ε and RNG k-ε turbulence model. When cavitation flow and non-cavitation flow were simulated and analyzed, the pressure of blades under incipient cavitation, developed cavitation and serious cavitation were gotten. The paper also gave the principle of incipient cavitation and divided the region into five cavitation regions based on bubble relative length. The results show that with the decreasing of inlet total pressure, bubble appears firstly in suction surface of the blade, and then moves along the blade profile, and next forms attached cavitation bubble. After this stage, bubble is gradually out of the mainstream movement and close to the pressure surface. Finally, the flow passage is filled with bubble, which hinders the flow. The number σ=0.3067 of incipient cavitation is a greater dimension hierarchy than that of σ=0.0281 under design condition. Seen from the impeller meridian plane, bubble appears firstly in the near the hub, goes towards forward cover plate, and attaches near the front cover. Cavitation in centrifugal pump is subdivided again into the five stages, that are incipient cavitation, critical cavitation, developing cavitation, complete cavitation, broken cavitation.
Yi S.,China Energy Engineering Group Co. |
Yi S.,University of La Coruña |
Samper J.,University of La Coruña |
Naves A.,University of La Coruña |
Soler J.M.,CSIC - Institute of Environmental Assessment And Water Research
Environmental Earth Sciences | Year: 2015
In situ diffusion experiments are performed in underground research laboratories for understanding and quantifying radionuclide diffusion from underground radioactive waste repositories. The in situ diffusion and retention, DR, experiment was performed at the Mont Terri underground research laboratory, Switzerland, to characterize the diffusion and retention parameters of the Opalinus clay. Several tracers were injected instantaneously in the circulating artificial water and were then allowed to diffuse into the clay rock through two porous packed-off sections of a borehole drilled normal to the bedding of the clay formation. This paper presents a single-site multicomponent reactive transport model of Cs+, a tracer used in the DR experiment which sorbs onto Opalinus clay via cation exchange. The reactive transport model accounts for the diffusive-reactive transport of 11 primary species and 22 aqueous complexes, and the water–rock interactions for 5 cation exchange and 3 mineral dissolution/precipitation reactions. Most of the solutes except for Cs+ diffuse from the Opalinus clay formation into the injection interval because the concentrations in the initial Opalinus clay pore water are larger than those of the initial water in the circulation system. Calcite dissolves near the borehole while dolomite precipitates. Dissolved Cs+ sorbs by exchanging with Ca2+ in the exchange complex. The computed dilution curve of Cs+ in the circulating fluid is most sensitive to the effective diffusion, De, of the filter, the selectivity coefficient of Na+ to Cs+, KNa–Cs and De of the borehole disturbed zone. The apparent distribution coefficient of Cs+, Kad, in the formation varies in space and time from 100 to 165 L/kg due to the temporal changes in the water chemistry in the formation. The results of a sensitivity run in which the initial chemical composition of the Opalinus pore water is the same as the initial chemical composition of the water in the circulation system show that the changes in Kad are negligible. The dilution curve of Cs+ computed with the reactive transport model coincides with that obtained with the Kd model. The tracer concentrations along the overcoring profiles computed with the Kd model, however, differ significantly from those computed with the reactive transport model. Therefore, a reactive transport model is needed for the appropriate interpretation of the Cs+ overcoring data from the DR diffusion experiment. © 2015, Springer-Verlag Berlin Heidelberg.
Wang B.,North University of China |
Li Z.-Y.,North University of China |
Zhou H.-G.,China Energy Engineering Group Co. |
Nie X.-T.,North University of China
Open Electrical and Electronic Engineering Journal | Year: 2015
Activity handover within engineering construction projects is time consuming, takes longer than the actual activities, and therefore, can cause duration delays. This paper presents relay chain seamless handover (RCSH) technology, which is based on relay technology theory and actor-network theory. This study systematically elaborated the RCSH processes, activity relay flows, and methods to address balancing speed under varying conditions. Our analysis results indicate that as compared to traditional activity handover, RCSH improves handover quality and guarantees the duration. RCSH technology was successfully applied in the third phase of the Three Gorges Dam Project, specifically for its concrete construction duration and quality control. Through the use of RCSH, effective overall planning, and efficient coordination of various production links, along with seamless activity handover in the third phase of the project were accomplished— with no additional time consumed by the handover process—and the construction of a concrete dam without a crack was achieved. © Wang et al.
Du X.,Lanzhou University of Technology |
Yu P.,Lanzhou University of Technology |
Shi S.,China Energy Engineering Group Co.
Information Technology Journal | Year: 2013
In order to make the coagulant dosage control performance better in water purification process, a mathematic model used for coagulant dosage control in water purification plant is established by the mathematical least square method. We have found the main factors influencing the turbidity water and coagulation thorns dosing quantity of the mathematical relationship and quantitative validate the quantitative, to establish the mathematical relationship in particular waterworks coagulant dosage automation mathematical model. The simulation results and the application results in the Xining No.8 water purification plant of the strategy used in the actual water purification plant verified its higher control accuracy. And also, it improved processing efficiency and the effluent quality, reduced the processing costs. © 2013 Asian Network for Scientific Information.
Du X.J.,Lanzhou University of Technology |
Shi S.T.,China Energy Engineering Group Co.
Information Technology Journal | Year: 2013
Foam glass production process is a typical nonlinear, large time delay, large inertia, strong cross-coupling, time-varying and complex control object. In this study, a new temperature control strategy is proposed by analyzing the working mechanism of the kiln and the temperature control problem in it. In the application, the Optimized Fuzzy Neural Network (OFNN) is applied to model the foam glass kiln and its weights and threshold value of the neural network are optimized by the Clonal Selection Algorithm (CSA) of the immune system theory. The structure of the controller is modified at any time in the process of production according to the temperature output error and its aim is to achieve the most stable temperature control of the foam glass production process in the kilns. The application of the model in the control system is successful and effective to improve the glass product quality. © 2013 Asian Network for Scientific Information.