Applied Mechanics and Materials Vol. 733

Abstract: Bainiuchang mine is located in the junction of three tectonic units. It has excellent forming geological conditions and the potential for prospecting. Among it, the Baiyang-Chuanxindong ore block has a large prospecting space. According to deposit the previous geological exploration engineering data, based on Surpac software to establish the deposit database and ore grade distribution model, and the application of ordinary kriging estimation of orebody resources, orebody resources evaluation is more reliable, accurate, efficient and fast. Through the deposit model of digitalization and visualization, it will greatly promote the process of digital mine enterprises in china.

Abstract: In order to reveal the impact of reservoir heterogeneity on its recovery and by taking the interlayer heterogeneous and inner layer sand superimposition model (two forms of complexity situation) into account, water flooding experiments have been conducted on parallel connected rock cores, which are selected and artificially casted cores with different permeability, at different injection rates. Experimental results suggested that water displacement recovery is kept decreasing with the increasing of interlayer heterogeneity. when the interlayer permeability ratio (ratio of high permeability versus low permeability) is at about 6.5 and water displacement rate is set at 0.5ml/min, 1ml/min, 1.5ml/min, 2ml/min, respectively, the water flooding experiments indicated that the low permeability recovery increased significantly and low permeability layer became main producer with the increasing of water displacement rate, on the opposite, the high permeability recovery showed no little big change. Laboratory experiments on the model of layer sand body superimposition revealed that the recovery rate of FTRLPTPL model is about 5%~10% higher than that of FTPLPTRL model.(FTRLPTPL is briefed from that flooding from the thick and rich in oil layer and produced from the thin and poor in oil layer. FTPLPTRL is briefed from that flooding from the thin and poor in oil layer and produced from the thick and rich in oil layer.) Analysis on the experiments in different reservoir inner situation told us that recovery enhancement of low permeability layer can play a significant role in increasing the overall recovery rate.

Abstract: Geological structure model is the foundation of the sedimentary faces modeling, property modeling and digital simulation, which includes the horizon model and fault model. Fault model which is accorded with underground conditions plays an important role in the structure modeling, so it would be an important work to build the fault model perfectly with the seismic and logging data. This paper take the fault modeling of C84-6 well area in Chaoyanggou field as an example, building the fault model by four methods of ‘Projection of polygon’ ‘Correction of depth domain seismic body’ ‘Checking by overlooking’ ‘Correction of breakpoints’ by the software of Petrel. The fault model which is built by integrating logging and seismic data can be the skeleton to build the final geological structure model, and those methods mentioned in this paper has been applied to the modeling work in some adjacent areas at present.

Abstract: Density logging is a very important method of nuclear logging, which is mainly exploring the density of rock bed through study the pore structure of reservoir and commonly employed in petrol geophysical exploration. It’s very important in density logging to study the effects of borehole conditions which can be helpful in developing instruments and improving the exploring efficient. This paper studied the response of high rank anthracite reservoir at the situation of borehole enlarging via MCNP.

Abstract: The aim of the study is to compare different kinds of microbial species for electricity production in the microbial fuel cells (MFCs) at low temperature. Experiments were conducted with single-chambered MFCs and medium anode inoculated with pure culture from activated sludge. Three kinds of exoelectrogens including Klebsiella sp. ALL-1, Shewanella sp. ALL-2 and Enterobacter sp. ALL-3 were used for evaluating their electricity activity. After adding solution into MFCs, the power of density grew from 50 mV to over 530 mV, and finally maintained at about 520+10 mV during the complete cycles. The results showed that MFCs with Enterobacter sp. ALL-3 had higher power and current density, shorter and more stable working circle at same level of voltage producing than other kinds of exoelectrogens. These characteristics made Enterobacter sp. ALL-3 as optimum exoelectrogen for electricity production at low temperature.

Abstract: NaOH, Na2CO3 and NaNO3 loaded on carbide slag are used as transesterification catalysts in a batch-type transesterification system. The activated catalysts are characterized by X-ray diffraction and the corresponding catalytic efficiencies are compared. NaOH loaded on calcined carbide slag gains the highest catalytic efficiencies. The optimal activated temperature of NaOH loaded on calcined carbide slag is obtained.

Abstract: This paper is aimed at exploring the characteristic fluctuation of wind power based on samples from a certain wind farm. First, the paper is to analyze fluctuations of wind power at different time scales. According to a sliding difference algorithm to build wind power fluctuations evaluation. Wind power fluctuation index for different time scales are used to fit probability distributions, indicating that the best form of distribution of wind power fluctuations is t location scale distribution. Secondly, considering the wind power has the characteristics of non-linear, non-stationary signal of the data, it fully meets the wavelet neural network analysis of the characteristics of the data. Therefore, select wavelet neural network training and testing so as to make predictions about the future of the total power of wind farm. It points out the differences between different regions covered by the index from the fluctuation characteristics of wind power, thus further understanding the fluctuation characteristics of wind power: Influenced by the time and space distribution and other factors, there is a big difference between the output power fluctuation characteristics of single wind generator and wind farm, which is because of the different wind machine in the field by the wind energy differences, and the wake effect of organic groups, making frequent fluctuations in power distribution; the fluctuation of wind is gentle, i.e. with increasing spatial distribution scale, so gentle effect occurs to wind power fluctuations. Finally, through the analysis of the fluctuation characteristics of power, power factor and analyses the influence of the characteristics of fluctuation, the paper draws a conclusion of the following improvement programs to overcome the adverse effects of wind power fluctuation of power grid operation: the rational allocation of energy storage devices, expanding the coverage area of a wind farm, or improving the design of the windmill, which will make wind farms adapt to different wind directions, thus eliminating the impact of fluctuations on the power grid from the wind farm power output by the energy storage device, and covering the area of large wind farms can adapt to different wind directions, and with power complementary, it has achieved the amount of stable power transmission into the grid.

Abstract: Solar photovoltaic power generation as an inexhaustible, inexhaustible clean energy has become the focus of future energy development. Along with photovoltaic power generation incorporated into the power grid, in order to make power generation plan reasonably, ensure the stable operation of power system, need to forecast the photovoltaic power output. In this paper solar photovoltaic power generation forecasting methods are analyzed and summarized. According to the application of solar photovoltaic power generation and demand, mainly on photovoltaic power generation system power prediction research method has carried on the comprehensive elaboration, hoping for the researches play an important role in promoting and advancing the development of solar photovoltaic prediction methods.

Abstract: With economic performance, effect, energy saving, safe and reliable, comprehensive performance unique advantages, more suitable for use in building the popularity of the villa with its solar water heaters and other energy-saving and environmental protection and the use of simple distinctions, by the majority of consumers, and has been the rapid development and wide application. Solar hot water system is not only energy use, more important role is to improve the environment, to meet the needs of the country with regard to energy conservation, but also for China to improve the energy structure, but also improve energy strategy considerations. Introduces the domestic and foreign common form of split solar water heating systems, analyzes the existing problems and causes, solar and electric auxiliary heating system, for example, to optimize the design ideas proposed split solar hot water system, proved that the system is stable reliable

Abstract: As a renewable and energy-saving technology, the earth to air heat exchanger has great advantages over the traditional thermal technologies both in initial investment and operation cost. This paper aims to review the research progress of EAHE in the world in view of numerical models and experiments, in which the EAHE needs to be further studied in the further.