Advanced Materials Research Vols. 986-987

Abstract: At present most of the research is aimed at the end of the central air conditioning equipment, not considering the inner link between each component of the central air conditioning. In order to achieve economic operation of equipment and systems, to maximize energy saving of central air conditioning, we designed and implemented a monitoring system analysis which considered in the system more equipments linkage, multi parameter coupling, and a variety of factor. It collected energy consumption data of each device, to get the system running in typical operating conditions of the system by simulating the optimal process parameters and guide debugging critical control equipment.

Abstract: Aiming at small islands location limits and the established power grid characteristics, the paper analyses some practical problems to be dealt with when renewable resource is utilized. Combined with the characteristics of small islands, the paper puts forward the new mode without energy storage devices, and designs a renewable resource application system driven directly by photovoltaic devices, emphatically analyses the key technology of no energy storage mode. The new mode effectively resolves the battle neck problem of traditional off-net mode.

Abstract: Firstly, this paper briefly introduces Panzhihua City’s location, climatic conditions and hours of sunshine. Secondly, it proposes alternative solution of integrating the heat collector with high-rise residential building’s facades. Thirdly, several equations on heat collector’s area, row distance, and azimuth are explained and discussed.

Abstract: China's increasing demand for energy, the energy development and utilization patterns of traditional high exploitation, high emission and low use, not only caused a serious waste of resources and environmental damage, but also is difficult to meet the needs of economic development and facing the industry crisis of survival. Entered a new period of development, the coal industry how to get out of a resource conservation and production intensive road of sustainable development becomes an important strategic task. In this paper, by constructing and using efficiency of coal resources optimal allocation model and path analysis for the sustainable development of coal industry, circular economy, as a kind of advanced development model to promote the coordinated development of resources, environment and economy, becomes the inevitable choice of the coal industry to explore a new road to industrialization.

Abstract: This paper aims to eliminate the danger of high temperature in the aluminum potroom by natural ventilation. According to the history of aluminum potroom, two different workshop structures are proposed to improve the natural ventilation effect. The first structure is called the inner-partition potroom, which contains blind grilles located at certain distance from the two sides of electrolytic cell. The second structure, called the large-opening potroom, directly set up a large opening on the outer wall of aluminum potroom. Two structures are compared with the aid of CFD simulation, and the physical model is established based on the field measurement. The velocity and temperature fields are simulated under three different outdoor conditions. By the comparative analysis of temperatures on the electrolytic cell and operating area, this paper indicates the large-opening potroom has better performance on high temperature condition.

Abstract: Southwest area of china is the zone of the transmission lines which often happens icing disaster. It is also an earthquake-prone area, also influenced by the interaction between ice and earthquake. This article uses the finite element method (fem), establishing three-dimensional model for steel towers in southwest china, to analyze the dynamic performance of the ice condition and the analysis of seismic action. The aim is to get internal forces for steel towers under the action of earthquake and deformation law along with the change of ice thickness.

Abstract: This paper is a further analysis of the strain tower on 1YD - JC4.After making a static analysis of 1YD - JC4 strain tower,we select the best offset point and make a dynamic analysis of it.Based on the finite element analysis software SAP2000, we set up a three-dimensional model of 1YD - JC4 strain tower of 110kv about heavy icing area,and then obtain the first six modal frequencies after making a dynamic analysis . We then draw the response spectrum curve.in the end, we select the safe and economic value of damping according to the curve.

Abstract: Wind energy utilization in the building environment has the advantage that it can avoid transporting effectively, especially it has important significance for residents without electricity. This paper mainly analyzed the basic situation of three-dimensional wind field around the buildings with the theoretical analysis and CFD numerical simulation method. By simulating the wind with different directions and different speeds, the characteristics of the wind field around single flat and pitched roof building are analyzed.

Abstract: The main objective of this paper is to review some models of medium-and-long-term wind speed distribution in wind farms, for example Gamma distribution, Log-normal distribution, Weibull distribution, Rayleigh distribution and Burr distribution. On the base of the Weibull distribution, some kinds of parameter estimation approaches are introduced. Meanwhile, the advantages and the disadvantages of various algorithms are analyzed and compared. The prospects of this research are put forward at the end of this paper.

Abstract: Wind power curve of wind turbine has great importance in the prediction of wind power. The measured wind power curve is drawn by method of bins based on recorded field data; the uncertainty factors of the wind power curve is analyzed, and a non-parametric confidence interval estimation method is proposed based on analyzing the statistical characteristics of the data distribution. By means of the method, a probability density function model for wind power in each wind speed level is established, and the uncertainty estimation confidence interval of wind power curve is obtained on the basis of deterministic estimation. The example analysis proves the efficiency and feasibility of the method proposed in this paper.