Advanced Materials Research Vols. 805-806

Abstract: In the first test segment (12m×16m) of 8m×6m wind tunnel with simulation of atmospheric boundary layer, we did first measuring pressure test research on rigid model of four tube self-supporting steel chimney, and got average wind pressure coefficient, maximum and minimum wind pressure coefficient distribution, as well as wind loads body coefficient of this structure, thus gave the body coefficient and extreme wind load envelopes of two species height chimney. The results show that in two wind speeds, the test results have good coincidence, reasonable value, and good regularity.

Abstract: An introduction was given to the basic structure principles and testing programs of EGR system. The technical key elements which can improve the comprehensive performances of EGR system were put forward, and these elements were composed of the choice of high pressure loop (HPL) and low pressure loop (LPL) EGR system, the design of EGR valve, the design of EGR cooling system, the uniformity of EGR in every cylinder and the matching with VGT system. Finally, a sum that EGR technical requirements meet different emission regulations was established

Abstract: Choose factors which influence the energy demand by the method of path analysis, build radial basis function (RBF) neural network model to predict energy demand in China. The RBF neural network is trained with the actual data of the main factors affecting energy demand during 1989-2003 and energy demand during 1993-2007 as learning sample with a good fitting effect. After testing network with the actual data of the main factors affecting energy demand during 2004-2007 and energy demand during 2008-2011, higher prediction accuracy can be obtained. By comparison with the BP network, RBF network prediction model outperforms BP network prediction model, finally RBF network is applied to make prediction of energy consumption for the year 2013-2015.

Abstract: The deoxidization of coal-bed methane is carried out under low temperature which ranges from 150°C to 200°C. In the three deoxidizers, the deoxidization characteristic of BJ-1 is mainly studied. With the function of BJ-1, oxygen content can be reduced to 1% or less. Moreover, the CBM whose CH₄ content is below 30%, can be deoxygenated safely. When the space velocity exceeds 25000h^-1, the oxygen content of outlet gas begin to great than 1%. In addition, through the experiment, the initial deoxidization temperature is determined as 160°C.

Abstract: Coal-based synfuels plants are facing serious pressure on CO₂ emissions reduction. Developing the coal-based synfuels system coupled with nuclear energy is an effective approach to reduce CO₂ emissions. This work analyzes CO₂ emissions features in the coal-based synfuels system, and further investigates three coupling paths between the coal-based synfuels system and nuclear energy. Subsequently, an inherent-safety and low-carbon coal-based synfuels system coupled with nuclear energy is proposed. In the coupled system, valley nuclear power is provided to conventional water electrolyser for hydrogen/oxygen production, and oxygen and hydrogen are supplied to the coal gasification and fuel synthesis processes, respectively. The simulation results show that the coupled system can reduce about 50% raw coal consumption and almost all CO₂ emissions compared to the conventional coal-based synfuels system, meanwhile it can improve the peak shaving capacity of nuclear power plants.

Abstract: Among the supply shocks on inflation, energy is one of the most important. In order to reflect energy condition’s impact on inflation comprehensively, referring the financial condition index, we construct China’s energy condition index by bring in 3 variables: China’s energy price, consumption and production. The empirical analysis’s result shows that the index has an ideal prediction to China’s inflation.

Abstract: The 1.5 generation hyperbranched molecule was synthesized with dehydroabietylamine as the core by means of Michael addition reaction and amidation condensation reaction with ethylenediamine and methyl acrylate as raws by divergent method. Then, the dispersant was synthesized by means of the 1.5G hyperbranched molecule as initiator by reaction with 2-aminoethanesulfonic acid. The structure of products were identified by IR spectra and ¹HNMR spectra. The influences of dispersant on apparent viscosity,rheological behaviour and static stability of coal water slurry prepared from Shenfu coal are studied. The results showed that as the slurry concentration reach at 67% the dosage of the dispersant was 0.4% (m/m), the viscosity of the coal water slurry was only at 987 mPa·s. The rheological investigation indicates that the slurry pumped with dispersant is pseudoplastic fluid.

Abstract: Financial management objectives have gone through three stages; they were maximization of profit, maximization of shareholders' equity and maximization of enterprise value. At present, the maximization of enterprise value is the most widely used financial management objective. Energy enterprise as the foundation of economic operation, it has economy nature and social nature for social and environmental responsibilities. It is important to weigh the interests of all parties to make energy enterprise value achieve real maximum. In this paper, energy enterprise effectiveness will be expanded, and discounted cash flow model will be used to analysis the impact of effective expansion around on energy enterprise value.

Abstract: Energy demand system is a complex system, which is affected and controlled by many factors and external environmental in its development and evolution process. This paper selected the prediction method of correlation, in the way of literature review at first, preliminary qualitatively choose factors which influence the energy demand. Then the direct, indirect and total effect degree of each factor on energy demand were measured by the method of path analysis. On the basis of path analysis, used ridge regression to eliminate multicollinearity to forecast China's energy demand, the prediction accuracy is high, and its practicability in this model is good.

Abstract: The utilization of high moisture, high volatile low rank coals such as lignite is gaining importance day by day to meet the growing demands of coal for the energy sectors. For the combustion of pulverized material it appears essential to dry lignite. Further, lowest possible ash and moisture as well as high heat content are desired for combustion. The present work gives the details of the preparation of a product of higher calorific value by thermal treatment of Inner Mongolia lignite. The low-temperature pyrolysis characteristics were carried out on the regularities of pyrolysis temperature and holding time on the product yield of dry distillation of lignite by using aluminium retort method. The result shows that the suitable pyrolysis condition of lignite is 450 ~ 510 °C, holding time for 30 min. The ratio of aliphatic and aromatic groups of 400°C semi-coke obviously decrease 53.1% and 11.8% compared with raw coal. The degree of aromatization of semi-coke is gradually increased and aromatic nucleus condensation degree increases. The retort process of lignite is a dehydrogenation, deoxidization and carbon-rich process.