Applied Mechanics and Materials Vols. 587-589

Abstract: This paper takes Yuanjiang 20MWp Grid-connected PV Station in Yunnan as an example, introduces the Grid-connected PV station configuration and engineering research in Plateau and analyzes and discusses its actual operating data. This research also studies the PV array operation mode and inclination angle combined with the terrain and the amount of solar radiation, and summarizes the designs and equipment selection of Grid-connected PV Station’s electrical system to accumulate design experience for future large-scale Grid-connected PV Station.

Abstract: Use solar energy as a complement of building heating energy, not only the building consumption will be reduced but also the air pollution problem during winter can be improved. However, the sparseness, discontinuity and instability of the solar energy are bottleneck of solar energy utilization technology. Thus the thermal storage technology becomes the most important part in solar energy system. Phase change thermal storage technology is more efficient then water, and it can charge the surplus solar energy for cloudy days to improve the utilization rate of solar energy. The performance of solar system can be improved by using phase change material storage technology. This review summarizes the previous study on phase change materials storage in solar energy application; the content of this paper can provide a reference for relative studies.

Abstract: Gansu province is rich in solar energy resources ,solar energy is clean and reproducible energy,it has an important advantage once we use solar energy in heating,supplying hot water in residential buildings. In the vast rural areas of Gansu, carbon emissions is huge because of slow way of heating and dirty fuel,such as briquette ,straw and so on. In this paper, we have a in-depth analysis on different forms of solar assisted heat source for hot water supply and heating, focusing on energy-saving effect, carbon dioxide emissions,and total energy deficit.The results show solar assisted biomass boiler is a worthy manner for heating and hot water supply ,it can save energy more than 60%. More important is it can reduce carbon dioxide emissions large extently.

Abstract: In this paper, to achieve waste heat utilization of large-scale comprehensive public study of Shenyang part of large-scale comprehensive hospital, first it has carried on the statistics of hospital waste heat utilization of point, adopting the K - means methods to classify the hospital waste heat utilization point and analyze the waste heat and establish waste heat utilization system .Then four paths of waste heat utilization have been got to get a further hospital waste heat utilization system of waste heat recovery efficiency, optimization study for the future.

Abstract: This paper aiming at absorption heat pump maximizing annual heating quantity, with the goal of thermal power plant absorption heat pump heating earnings in different heating regulation mode, set up calculation model of absorption heat pump heating earnings, analysis heat-supply network backwater temperature fluctuations and heat pump heating quantity difference in different heating regulation mode, discuss optimization approach of absorption heat pump taking basic heat load city heat-supply network heating regulation, calculate heat pump heating earnings finally. The results showed that the pure quality regulation can get the best economic benefits of absorption heat pump.

Abstract: Based on the research of the fuel cell in the direct supply of hydrogen fuel with residual methane content (2-7%) confirmed the possibility of the fuel system operation in an efficient mode. The possibility of using a considerable potential "weak" biogas with a relatively low concentration of organic ingredients to produce electricity and heat in autonomous power engineering is shown. Energy potential reserve the purged fuel markedly increases with the content of methane in the original fuel and increases the role of the thermal component of the divided energy flow to about 20-26%. Integrated use of fuel energy potential with residual methane content allows to provide total effective efficiency ~ 40%. Possibility of electricity generation on the basis of complex use of organic and hydrogen fuel at creation of objects of distributive systems of power supply will approach energy sources to the consumer, having increased energy-economic indicators and efficiency of fuel use.

Abstract: The development of modern energy is closely linked with the use of renewable energy. One of the leading trends in the field of renewable energy is photovoltaic , direct conversion of sunlight into electricity . Photovoltaic (photovoltaics) - the science that studies the process of converting sunlight into energy electric. Process is a direct conversion of sunlight into electrical energy using special semiconductor components. It is based on the physical phenomenon of the photoelectric effect - "pulling " electrons from a substance (silicon) under the action of light particles (photons) with the necessary energy (wavelength) .

Abstract: Use of renewable energy sources is an integral part of the concept developed for improving energy efficiency of buildings. This study is dedicated to the problem of solar power supply for the buildings under the conditions of high-density urban development. The article deals with an estimation method assigned to define impact of partial shadowing on the surfaces of photovoltaic modules with respect to an amount of electric power a solar power system generates.

Abstract: With the purpose to ensure extra solar power for buildings and improve quality of urban environment solar power has appeared to be sought-after in the majority of southern countries. In the case of the Northwest Region of Russia estimation of existing regional power reserves for construction sector is the fundamental factor when an issue of achieving possible ways to supply buildings with solar-based power is considered. The article deals with the methods and calculations made to obtain the data on solar radiation effects on sloping surfaces oriented in different cardinal directions in regard to Saint-Petersburg weather-related conditions. Electric power generation using solar photovoltaic modules (PV modules) has been defined under actual operating conditions.

Abstract: Through studying the current development condition of shallow geothermal energy in urban area of Kaifeng City and the corresponding data of geological exploration, by taking into account the various factors influencing the applicability of different heat exchange systems, and by means of GIS and AHP, a comprehensive evaluation and preliminary zonation for the development of shallow geothermal energy in urban Kaifeng are carried out . The research result indicates that the development of ground heat exchange system in the whole urban area of Kaifeng City is feasible and applicable. Furthermore, some suggestions about the development and utilization of shallow geothermal energy in the area are put forward.