Advanced Materials Research Vol. 772

Abstract: An approach was proposed to calculate the directions of crystal defects in the research of synchrotron radiation topography (SRT). The calculating method was deduced based on the theory of homogeneous coordinates. When spherical coordinates of a crystal defect had been calculated in a radiograph, the directions of the defect on any other radiograph, taken after the specimen had been turned around any axis in the SRT experiments, could be calculated. The directions of crystal defects can be determined by the methods previously been used only if the images of the same defects are similar in the topographs, but it is often not the case in the SRT experiments. With the method proposed in this paper, it is convenient to analyze the defects in different radiographs on which the images of the same defects are dissimilar. An example was taken to show the use of the method.

Abstract: Response function is a fundamental parameter for all detectors in order to analyze the energy distribution of gamma ray which undergoes scattering interaction with the material. The response functions of a 3 in. x 3 in. NaI(Tl) collimated detector for non axis detector-source geometry has been calculated using a Monte Carlo approach from GEANT4 simulation code with 0.662 MeV of mono-energetic of photon gamma ray. Collimated Pb with 4 cm thickness and 2 cm of holes diameter were employed for shielding. The source was assumed as an isotropic point source and it is placed at various positions to the detector axis. The comparison between the measured energy response functions and the simulated energy response functions after normalization were also performed in order to validate the modeling results.

Abstract: Along with the global warming impacts and climate changes, the demands for air conditioning and refrigeration have increased. Therefore, providing cooling by utilizing renewable energy such as solar energy is a key solution to the energy and environmental issues. In this paper are presented theoretical basis and practical applications for cooling technologies assisted by solar energy and their recent advances. The ejector cycle represents the thermo-mechanical cooling system, and has a higher coefficient of performance (COP) but require a higher heat source temperature than other cycles. Based on the thermal COP of each cycle, the absorption cycle which represents the thermal cooling is preferred to the ejector cycle. Next to improving efficiency of solar cooling technologies, research on advanced solar collector is the most important research topic.

Abstract: This paper presents a small wind-solar hybrid power generation system based on multi-agent. The system is composed of wind power agent module, solar power agent module and battery charging and discharging agent module. The power agent generation module is composed of the communication agent, decision-making agent, data processing agent, data collecting agent, power transformation operating agent, protection agent, coordination agent and component control agent. According to the different weather conditions and different power state of equilibrium, the agents of the small wind-solar hybrid power generation system coordinate and use the optimal control strategy to achieve the best operation state of the power system.

Abstract: This paper introduces a method of design and implementation of wind-solar hybrid power generation system based on multi-agent. The paper mainly introduces the system hardware structure chart and the parameters design of Buck-Boost circuit. It also introduces the software design of wind power and solar power generation agent module and storage battery charging and discharging agent module. Finally the system wind solar hybrid switching waveforms are analyzed, the waveform analysis can show that the circuit switch is normal and work stably.

Abstract: With the economic and social development, the supply and development of energy have been the outstanding problems affecting human survival and development. On the basis of ensuring the safe and efficient supply of clean energy, building a strong and smart grid, can be conducive to energy conservation and smart electricity. Through analysis of the development and status quo of clean energy and discussion of the features and advantages of the strong and smart grid, the article proposed the development of a strong and smart grid had important significance of advocating low-carbon economy, promoting the transformation of energy supply, and the protection of for the sustainable economic and social development. Finally, the article gave the outlook for the future of the development of a strong and smart grid.

Abstract: In recent years, for the high voltage transmission lines suffered serious Icing lead wire dancing, break and tower collapsed, domestic and foreign strengthened the study of high-voltage overhead line deicing methods and put forward a variety of line deicing methods. This paper first introduced thermal ice-melting method, mechanical deicing method, natural deicing method and several common deicing methods and analyzed the pros and cons of various deicing program. Based on the analysis of deicing methods for the high voltage transmission lines, a new and simple high voltage transmission line deicer is brought forward. This paper briefly discussed the basic principles and advantages of the device, providing a new way of thinking for the high voltage transmission lines deicing and having a certain value and social benefits.

Abstract: As one of the key technic of achieving high-altitude and long-time flight, the stratospheric airship energy system in stratosphere is always the important point but also very difficult. In this paper, the stratospheric airship geometry analysis as a starting point, through a series analysis as follow: the stratospheric airship surface mesh model, the sun vector, the relationship between the sun vector and the body coordinate system, and the solar radiation model, we have accomplished the characteristics analysis of the radiation receiving on stratospheric airship. The analysis result show that: Although different flight direction corresponding to different distribution of light intensity, the light changes from sunrise to sunset is symmetrical when the stratospheric airship on the condition of level flight. Airship for east heading of region resides, the maximum energy can be obtained when the solar array laying in the installation of 0 β π / 4. With the changing of heading angle and pitch angle, the radiation receiving of the solar array can also transform, but the influence of pitch angle greater than heading angle.

Abstract: With increasing deficiency of fossil energy, seriously environmental issues, renewable energy development and utilization seemed imminent .By analyzing the energy status quo, analyzing the development of wind power technology in the United Kingdom briefly, the paper proved the necessaries and advantages of wind power. And combining with the development of China's energy and facing the problem, the paper put forward the feasibility of wind energy construction proposals for future development.

Abstract: Advantages of wind power are self-evident, but the impact of wind power project on the local ecological environment and natural landscape is also increasingly subject to public attention. It mainly reflects in the visual pollution of the wind turbine (or natural landscape problems), noise, bird safety and electromagnetic interference. The paper analyzed the impact of wind farms on the environment, and recommended appropriate preventions and control measures to reduce it to an acceptable level.