Advanced Materials Research Vols. 347-353

Abstract: For the sake of studying on the thermal effects of glass curtain-wall to the integrated buildings, 16 types of glass curtain wall are slected to build office building energy consumption models, and the meteorologic parameters are chosed from Harbin, Beijing, Shanghai and Guangzhou respectively, totally 384 models are investigated. The simulation results show that, U-value of glass curtain-wall impacts less to the energy consumpiton of intergrated building from the northern city as Harbin to the southern city as Guangzhou, the SC of glass curtain-wall has a stronger impact on the energy consumpiton of intergrated building from the north to the south of China, which is reverse effect of the U value.

Abstract: The CO2 capturing technologies as applied to FCC flue gas in order to reduce GHG (green house gases) were evaluated and compared in this review. Although the CCS (carbon capture and storage) idea has been proposed for more than 30 years, there has been little commercial success of CCS projects. The largest issue is where to store the massive amount of captured pure CO2 every year. Therefore, the review will focus on the efficient use of power or heat to reduce CO2 emission and how to recycle the use of produced CO2 before it is emitted to the atmosphere rather than being captured and stored. The scenarios with oxyfiring, microalgae-cofiring or biogas burning to treat FCC flue gas are introduced and discussed.

Abstract: Biological invasions have been identified as one of the human-induced global changes, which not only threaten native biodiversity but also cause a considerable economic loss both globally and locally. The long distance dispersal of alien species is often facilitated by human activities and disturbances. This paper summarized lots of paper to explain how road affect the local biodiversity and accelerate the invasion process of alien species. We discuss several aspects to clarify this issue: the impacts of roads affect the alien and native species in new regions, environmental conditions near roads affect the effect of roads, the effects of roads on alien species in high altitude regions, the effects of roads on different propagation manner of alien species and at last the fast growth of road length and alien species in China. Human disturbances promote the performance and abundance of alien species in new regions, and roads as one key of human disturbances act as corridors for the flow of alien propagules and seeds into new landscapes and ultimately accelerate the invasion process of alien species.

Abstract: The dielectric properties for Borassus Flabellifier BF wood were determined in the longitudinal and perpendicular directions of fibbers at different moisture content. The wood parts of male and female Borassus Flabellifier tree were taken from where the natural liquid Neera collected overnight. The wood parts were dried by microwave oven from 25 percent moisture content to oven dried condition. The dielectric parameters were measured by four-probe method. All the measurement was taken on frequency 105 Hz at room temperature 3110K. The Results indicate that the longitudinal values were nearly same as perpendicular directions of fibbers for both dielectric properties and dielectric conductivity with moisture content. In this study the drying of wood done by microwave energy using a continuous microwave drier was compared to that by conventional method. Characterization of the samples was made by scanning electron microscope (SEM) Model JEOL JSM5400. The specimen’s were collected from Dhar Dist. (M.P.) India.

Abstract: This study is a high-performance, energy-saving drive technology for all pcLED based on luminescence relaxation properties. Its core idea is coordination between power driving model and pcLED relaxation properties. Compared with relative small pulse width, forward pulse excitation current can make pcLED luminescence tends to its saturation peak rapidly during this period because of the steep leading edge of relaxation properties. And in the vacant period of forward pulse excitation current, because of the chosen of best duty cycle, it will be the most effective utilization for luminescence afterglow which has slow attenuation characteristic.

Abstract: This article presents a proper approach for the prediction of output power for photovoltaic generation system. Using the results of solar irradiation from the sunny-day-model as the base value, which are accurate when the sky is clear, and correcting the forecasting results with the assistance of Markov Chain in order to make them valid for other kinds of weathers. To be specific, by utilizing Markov Chain, the underlying stochastic effects of clouds coverage can be minimized and thus harvest more accurate results. The method is tested on the photovoltaic generation system of Electrical Engineering School, Wuhan University, P.R.China and rendered a satisfactory precision of forecasting. Finally, further measurements for enhancing accuracy are also discussed in this paper.

Abstract: This essay briefly introduces the solar energy- ground source heat pump, respectively analyzes advantages and disadvantages of the solar energy and ground source heat pump, illustrates necessities of integrated applications of the solar energy and ground source heat pump in Changchun, and finally points out problems which exist in the technology.

Abstract: Based on the analysis of geological structure and characteristics of the Cambrian limestone’s aquifer in the eighth mine of Pingdingshan Coal Mining Cooperation, defining rich aquifer regions of the Cambrian limestone , influencing radius in mining aquifer, thickness of water isolated stratum and geothermal gradient between the Group F seam’s base and the Cambrian limestone’s roof by TEM and DC electrical methods,7 dewatering depressurization holes at a depth of 150m are designed to discharge the Cambrian limestone’s geothermal water in the West Roadway’s floor of Group F seam. 7 discharge water holes’ water inflow is 300 m3/h , and the Cambrian limestone’s drawdown is 17.2 m in the West Roadway in 277 days. The geothermal water temperature is 50°C and the water can be raised to the surface for comprehensive utilization, in order to reduce the high pressure geothermal water hazards and avoid the waste of geothermal water, which is great significant for safety production in coal mines , energy saving and emission reduction.

Abstract: Unreasonable land use and planning made a significant impact on water environment in the process of rapid urbanization, which lead to deterioration of water quality, ground subsidence, floods and other serious consequences. In the analysis of water environment on the basis of its formation mechanism, community can be taken as our subject. The urban water environment can be classified into four parts according to the ways of utilizing the land: Construction area, Traffic Area, Green land and Waters. From different levels and the demand of optimizing the water environment, from three aspects: basic thought and steps, controlling strategies and supporting policies on community rainwater utilizations and planning.

Abstract: This article to research through SHPB test of the rocks in the plastic damage under the cumulative effects. This paper selects bullets for the diameter steel rods, the bullet hit by a fixed speed when fixed, selects the two kinds of circumstances for gas chamber pressure such as P = 0.6 MPa and P = 0.7 MPa. It is concluded that the main important conclusions： Test specimen didn’t reach the effect for ,Limestone which is no initial damage to absorb lesser energy, as the same time the internal stones damage were also lower, and with the impact times accumulation, limestone damages degree were increasing, eventually make the specimen destroy. The internal of rock specimens are low destroy, when has the same effect, specimens receiving the maximum stress by lesser,when the internal damage can cumulative increases to certain value, and is suffered the same stress effect, finally the maximum stress will be decreased. For rocks material at repeated impact as low speed ,under this action show the obvious plastic damage accumulation effect