Applied Mechanics and Materials Vols. 178-181

Abstract: This research explores the influence of different street geometry towards reducing the energy consumption in buildings by utilizing building energy simulation software. In different climate condition, the different street geometry has different influence on building’s energy consumption. This influence is quantified in this research. It is found that in three climate zones – Beijing, Shanghai and Guangzhou, the energy consumption of buildings is changed according to different H/W ratio of buildings. This finding determines that the optimum street geometry will be different in these climate zones. The designers should consider such difference before doing architecture or urban planning work. This research will also provide some suggestions and recommendations to the energy-efficient community design based on the findings.

Abstract: Solar assisted heat-pump water heating system combines the advantages of Solar Utilization Technology and heat pump water heating technology, it is a new water heating system with energy conservation and environmental protection. Under the premise of putting up experimental system, some performance parameters have been tested, such as the heating rate, the heat collecting efficiency of the system and the influence of indoor air temperature on the outlet water temperature and the energy efficiency ratio of the water heating system. The experimental results show that solar assisted heat-pump water heating system has the advantages of high energy efficiency ratio, shorter consuming time than traditional solar water heating system when heating water, and it can be concluded that this new water heating system should be applied in the future.

Abstract: The library is the information center and the major energy consumer in universities. Based on the trend of social development and the actual situation of universities, this thesis puts forward "solar"" heat" and" wind", the renewable energies suitable for university library construction and methods of their utilization, and meanwhile draws such conclusions as “giving full play to the role of Architects"," strengthening the professional cooperation" and" designing from the overall perspective".

Abstract: Dye-Sensitized Solar Cell (DSSC) is noticed to be proper for BIPV for cheaper, more transparent, and able to realizevarious colored. Researchers constantly strive to improve the power conversion efficiency of DSSCs for this cell’s practicability by doping TiO_{2Subscript text} with inorganic substance, metal ions, or processed with organic, as TiO₂ electrode is the core of DSSC to generate photovoltage effection. Here reported a method to determine the optimal La³⁺ doping proportion of TiO₂ by the equivalent circuit parameters estimated corresponds to the reported experment I-V curve. Thus, the concentration of La³⁺ doped TiO₂ thin films of 0.5% of DSSC can get the most out of the photoelectric conversion efficiency.

Abstract: The paper focuses on a new type of solar collector used double plastic-steel windows and covered of double common glasses. To ensure air passage closed and insulation, the collector is prefabricated made in whole. The inside and backplane of collector are covered of heated enamel in dark green with copper oxide, magnesium oxide and iron oxide; The penetrated metal mesh is placed in air passage between absorber and glasses to enhance heat transfer. The size and position of gas inlet and outlet of collector could be specified by means of simulation and analysis. Heat loss coefficients and thermal efficiency are tested. The results show that thermal efficiency of collector is superior and performance of heat preservation is good. The application of collector in solar buildings can replace the Trombe wall and be used as a type of outdoor, easy to regulate their construction process and ensure the effect of solar collector.

Abstract: Today the energy crisis is increasingly tense, because the solar building has the advantages of ecology and sustainability, it has broadly prospects for development, and it is increasingly becoming a new architectural concepts and methods. The paper systematically described the experience of BIPV technology applications, forecast the development trends, discussed the key issues needing to dispose and put forward a viable development strategy. Through specific examples, this paper carried out in-depth study and conducted a comprehensive discuss about the relevant issues. This is very meaningful to solve the global energy crisis and establish a low-carbon world.

Abstract: This paper will analysis the energy-saving situation for the urban village building envelope structure such as the wall, windows, roofs and others according the economic conditions and climate characteristics of northwestern Henan province, put forward the suitable designing ideas and measures about the energy-saving for the exterior-protected structure, provide a basic research for the urban village energy-saving designing.

Abstract: This paper refers to currently the 1.5MW cone tube type wind-driven generator tower, design the model of the concrete-filled steel tube wind turbine tower with three limb columns, and research on the force performance, such as the change of internal force, the process of failure, hysteretic behavior, bearing capacity, ductility and energy dissipation capacity by the pseudo-static experiment on the scale model of wind turbine tower. The study shows that the P- hysteretic curve of lattice concrete-filled steel tube wind-driven generator tower with three limb columns is asymmetric, relatively full “spindle” and the phenomenon of “knead shrink” is not obvious, which account for it has good force behavior and energy dissipation capacity. This kind of tower structure, of which the reverse bearing capacity is greater than the positive, and the reverse ductility coefficient is less than the positive, indicates that it’s reverse plastic deformation ability of the tower structure is weaker than it’s positive.

Abstract: In this paper, the development scenarios of electricity consumption of city residents living were analyzed by using the prediction method of time-series smoothing. The simulation calculation to the future development scenarios of electricity consumption forecasts the electricity consumption values of residential building in this case area from 2010 to 2050. The conclusion, that controlling living area per person is most effective measure, has reference significance for the future residential building energy efficiency work.

Abstract: As the sunlight must illuminate the optical fiber in a certain angle in the fiber optic lighting system, a sunlight collecting machine is designed. It uses the 3DU51 light activated triode to transform the changes of sunlight's intensity which is caused by the position of the sun into electrical signals. And after the processing of ADC0809 converter, the signal is sended to AT89S51 single-chip microcomputer which will produce electrical signals to control the electromagnetic relay switches closed or disconnected, realizing that the driving motor can be controlled to start rotating and stop rotating automatically. So the sunlight collecting machine can track the position of the sun, collecting the most strong direct sunlight, improving the system's efficiency of collecting sunlight.