通过将太阳能与自动追光技术相结合,基于STM32F103C8T6单片机设计了一款太阳能双轴自动追光充电系统。该设计能够对太阳的运动轨迹进行实时追踪,确保太阳能板始终正对太阳,达到最大化吸收太阳能的目的。与以前的太阳能板相比,该系统的...通过将太阳能与自动追光技术相结合,基于STM32F103C8T6单片机设计了一款太阳能双轴自动追光充电系统。该设计能够对太阳的运动轨迹进行实时追踪,确保太阳能板始终正对太阳,达到最大化吸收太阳能的目的。与以前的太阳能板相比,该系统的优势主要体现在对太阳能的利用率更高、发电的能力更强,系统的适应能力更强、更稳定、更有集成性和可靠性,符合国家提倡的可持续发展,它将为国家的节能减排作出巨大贡献。By combining solar energy with automatic light chasing technology, a solar dual-axis automatic light chasing charging system was designed based on an STM32F103C8T6 single-chip microcomputer. The design can track the sun’s movement in real time, ensuring that the solar panels are always facing the sun so as to maximize the absorption of solar energy. Compared with the previous solar panels, the advantages of the system are mainly reflected in the higher utilization rate of solar energy, stronger power generation capacity, stronger adaptability, more stability, more integration and reliability of the system, in line with the sustainable development advocated by the country, it will make a great contribution to the country’s energy conservation and emission reduction.展开更多
双轴追踪式光伏发电（TPV）系统因比固定式光伏发电（FPV）系统具有更强的发电能力而备受关注,为推进TPV系统和FPV系统的实用进程,对这2种系统运行特性进行研究很有必要。通过理论计算验证了TPV系统和FPV系统采集数据的准确性,实验数据...双轴追踪式光伏发电（TPV）系统因比固定式光伏发电（FPV）系统具有更强的发电能力而备受关注,为推进TPV系统和FPV系统的实用进程,对这2种系统运行特性进行研究很有必要。通过理论计算验证了TPV系统和FPV系统采集数据的准确性,实验数据分析结果显示在实验期间的8—11月TPV系统总发电量平均比FPV系统大16%左右,推测出上海地区全年TPV系统发电量比FPV系统大16%左右,在西北地区这一优势将进一步扩大。室外日辐照总量越大,系统的发电量也就越大,当水平面日辐照总量〉4 k W·h/m^2时,TPV系统比FPV系统日发电量高12%-25%左右;当水平面日辐照总量〈2 k W·h/m^2时,TPV系统比FPV系统日发电量低20%左右。针对阴雨天TPV系统发电量低于FPV系统发电量,从光伏系统半导体发电原理上进行深度解析,得出相关结论并提出相应应对策略。为TPV系统和FPV系统的实用性研究、推广提供较重要的参考依据。展开更多
The photoluminescence （PL） and Raman spectra of undoped ZnO films deposited directly on Si substrate （sample A）,on Si substrate through a SiC buffer layer （sample B）,and on a ZnO crystal wafer （sample C） are i...The photoluminescence （PL） and Raman spectra of undoped ZnO films deposited directly on Si substrate （sample A）,on Si substrate through a SiC buffer layer （sample B）,and on a ZnO crystal wafer （sample C） are investigated. There are emission peaks centered at 3.18eV （ultraviolet,UV） and 2.38eV （green） in these sampies. Comparing the Raman spectra and the variation of the PL peak intensities with annealing atmosphere, we conclude that the luminescence of the samples is related to the tensile strain in the ZnO film due to the lattice mismatch between the film and the substrate. In particular, the tensile strain reduces the formation energy of OZn antisite oxygen defects,which generate the green emission center. After annealing in oxygen-rich atmosphere, many OZn defects are generated. Thus, the intensity of green emission in ZnO/Si hetero-structure materials increases due to tensile strain in ZnO films.展开更多
In the 21th century, one of the biggest problems that the world faces is energy provision. Today, the way that most countries use for energy production is not clean and continuous. The most obvious proof for that is t...In the 21th century, one of the biggest problems that the world faces is energy provision. Today, the way that most countries use for energy production is not clean and continuous. The most obvious proof for that is the change in the climate. The amount of CO2 （carbon dioxide） that is caused by fossil fuel burning increases day by day and this situation creates the greenhouse effect and change in the climate. The sun is one of the best solutions to this problem. It is not only clean and continuous, but also available anywhere, anytime. However, the efficiency of a photovoltaic system is directly related to the amount of solar energy acquired by the system which means that, it is necessary to follow the sun to have a high efficient system. There are two types of trackers that follow the sun and there are several ways to build them. In this paper, solar tracker designs are examined and a new dual axis solar tracker design is given.展开更多
文摘通过将太阳能与自动追光技术相结合,基于STM32F103C8T6单片机设计了一款太阳能双轴自动追光充电系统。该设计能够对太阳的运动轨迹进行实时追踪,确保太阳能板始终正对太阳,达到最大化吸收太阳能的目的。与以前的太阳能板相比,该系统的优势主要体现在对太阳能的利用率更高、发电的能力更强,系统的适应能力更强、更稳定、更有集成性和可靠性,符合国家提倡的可持续发展,它将为国家的节能减排作出巨大贡献。By combining solar energy with automatic light chasing technology, a solar dual-axis automatic light chasing charging system was designed based on an STM32F103C8T6 single-chip microcomputer. The design can track the sun’s movement in real time, ensuring that the solar panels are always facing the sun so as to maximize the absorption of solar energy. Compared with the previous solar panels, the advantages of the system are mainly reflected in the higher utilization rate of solar energy, stronger power generation capacity, stronger adaptability, more stability, more integration and reliability of the system, in line with the sustainable development advocated by the country, it will make a great contribution to the country’s energy conservation and emission reduction.
文摘双轴追踪式光伏发电（TPV）系统因比固定式光伏发电（FPV）系统具有更强的发电能力而备受关注,为推进TPV系统和FPV系统的实用进程,对这2种系统运行特性进行研究很有必要。通过理论计算验证了TPV系统和FPV系统采集数据的准确性,实验数据分析结果显示在实验期间的8—11月TPV系统总发电量平均比FPV系统大16%左右,推测出上海地区全年TPV系统发电量比FPV系统大16%左右,在西北地区这一优势将进一步扩大。室外日辐照总量越大,系统的发电量也就越大,当水平面日辐照总量〉4 k W·h/m^2时,TPV系统比FPV系统日发电量高12%-25%左右;当水平面日辐照总量〈2 k W·h/m^2时,TPV系统比FPV系统日发电量低20%左右。针对阴雨天TPV系统发电量低于FPV系统发电量,从光伏系统半导体发电原理上进行深度解析,得出相关结论并提出相应应对策略。为TPV系统和FPV系统的实用性研究、推广提供较重要的参考依据。
文摘The photoluminescence （PL） and Raman spectra of undoped ZnO films deposited directly on Si substrate （sample A）,on Si substrate through a SiC buffer layer （sample B）,and on a ZnO crystal wafer （sample C） are investigated. There are emission peaks centered at 3.18eV （ultraviolet,UV） and 2.38eV （green） in these sampies. Comparing the Raman spectra and the variation of the PL peak intensities with annealing atmosphere, we conclude that the luminescence of the samples is related to the tensile strain in the ZnO film due to the lattice mismatch between the film and the substrate. In particular, the tensile strain reduces the formation energy of OZn antisite oxygen defects,which generate the green emission center. After annealing in oxygen-rich atmosphere, many OZn defects are generated. Thus, the intensity of green emission in ZnO/Si hetero-structure materials increases due to tensile strain in ZnO films.
文摘In the 21th century, one of the biggest problems that the world faces is energy provision. Today, the way that most countries use for energy production is not clean and continuous. The most obvious proof for that is the change in the climate. The amount of CO2 （carbon dioxide） that is caused by fossil fuel burning increases day by day and this situation creates the greenhouse effect and change in the climate. The sun is one of the best solutions to this problem. It is not only clean and continuous, but also available anywhere, anytime. However, the efficiency of a photovoltaic system is directly related to the amount of solar energy acquired by the system which means that, it is necessary to follow the sun to have a high efficient system. There are two types of trackers that follow the sun and there are several ways to build them. In this paper, solar tracker designs are examined and a new dual axis solar tracker design is given.
