太阳能光伏灯具的应用探讨

本文简单介绍了太阳能光伏灯具的工作原理和控制器的"光控、时控、光控 时控"三种控制方式的特点;详细对比分析了现在太阳能光伏灯具的优点和缺点;推荐了几种现在最成熟、最可靠、性价比较高、最适合推广的产品;简述了LED的现状和发展趋势;总结了我国光伏灯具目前需要迫切解决的问题。     

高亮度低成本太阳能LED灯具的研究

在超高亮LED的使用、平头LED组合光源的设计以及控制器技术的改进等方面阐述了高亮度低成本太阳能LED灯具的实现,同时介绍了太阳能LED灯具的组成、特点及应用。     

光控太阳能路灯的设计

近年来，随着太阳能发电产业的迅速发展，光伏应用的领域正在逐渐扩大，各种光伏新产品不断涌现。在照明灯具中，作为技术和艺术相结合的太阳能路灯，已开始在很多地区推广应用。太阳能路灯具有很多优点：安全可靠，维护方便；不需要常规能源，不污染环境；可以根据需要随处安装，不用连接公共电网，因此安装时不必挖掘路面或草地，无须开沟埋设电缆。需要时还可以移动位置，重新安装到另外的地点，灵活方便。太阳能路灯通常由光伏方阵、蓄电池、控制器和灯具（包括控制箱、灯杆等支撑部件）所组成，一般有定时和光控两种。尤其是光控太阳能…     

太阳能光伏灯具与智能电网并网的探讨

分析当前我国居民用电的特点,且简要介绍当前缓解用电高峰期电网负荷所采取的一些措施。并基于太阳能光伏灯具的工作机理,提出对太阳能光伏灯具与智能电网并联以此作为缓解用电高峰期电网负荷的一种方法,探讨太阳能光伏灯具与智能电网并网的可行性。最后总结太阳能光伏灯具与电网并联可以缓解用电高峰期的电网的负荷,指出目前所存在的一些技术问题。     

太阳能光伏水泵和照明综合应用系统

本文介绍光伏水泵和照明综合应用系统,以及光伏水泵系统的发展情况。利用太阳能光伏水泵系统解决无电地区农牧民人蓄饮水、农田灌溉问题是一条经济可行的途径。光伏水泵系统具有广阔的推广应用前景。     

太阳能PV技术与LED光源--建筑照明节能的新途径

太阳能光伏发电系统已经出现很多年了,但是由于其初期投入高,在建筑照明系统中还没有得到广泛应用.随着发光二极管技术的高速发展,尤其是白光二极管的高效特性,太阳能光伏发电系统与LED灯结合的照明系统将成为建筑照明节能的新途径.     

太阳能灯具的电器安装与操作

太阳能灯具作为一种典型的太阳能应用产品,正逐渐引起社会各界的关注,应用实例遍布全国大部分地区。鉴于行业还没有形成规范,为避免太阳能灯具电气安装过程中出现一些不必要的问题,使太阳能灯具电气安装规范化,本文对太阳能灯具电气安装操作过程及注意事项作一简单介绍。     

共同努力奋斗振兴光伏产业

这次会议的主题是探讨中国光伏产业的发展问题。近年来,中国光伏产业的发展显现出很好的发展趋势。今后中国光伏产业到底怎么发展?朝哪个方向发展?是大家关心的问题。我们希望通过这样的研讨会,使中国光伏届各位同仁多学习国际上的一些先进经验,包括技术上的经验、市场开拓经验及政策支持上的经验,使之在我国光伏产业发展中起到借鉴作用。     

太阳能综合供电系统放电控制器设计

简要介绍了太阳能扬水与照明综合应用系统的组成;侧重描述系统放电控制器的硬件原理和软件设计 流程;并结合试制产品的实验情况,分析了系统可靠性、高效性及智能化等优点。     

Solar orbital power: Sustainability analysis

Solar power plants positioned in space for terrestrial electricity use have been proposed due to the ever-rising world energy consumption and its environmental impacts. This idea is analysed here in the context of sustainability of such power generation. To that end we have performed some new economic, environmental and social effects analysis of electricity generation by solar space power plants of both photovoltaic and solar thermal types power using the best currently available technology. The plants in the analysis were assumed to be in different Earth orbits, or on the Moon built by a robotised factory. One of our results is that both economically and environmentally the best scenario may be to launch a thermal solar power plant to the geostationary orbit from the Moon. Electricity produced in this way could be economically competitive to that generated by fossil fuels on Earth already for as few as 100 space power plants of about 5-10 GW each. This option is also deemed socially responsible with its capacity to reduce poverty with large amounts of cheap clean energy, and environmentally friendly, because it produces more than a hundred times less emissions than the same amount of electricity produced from fossil fuels on Earth.     

Solar thermal analysis of transparent-honeycomb-insulated ground collector-storage system

This paper presents an analysis of heat transfer processes in a transparent-honeycomb-insulated solar collector made of such low-energy materials as soil/sand/concrete, which also acts as a heat store. The analysis assumes solar intensity and atmospheric temperature as well as the resultant temperature in the ground and concrete/sand region to be periodic. An explicit expression for the heat flux that can be extracted at constant mass flow rate and at constant heat extraction temperature is derived. Numerical computations corresponding to typical months of June, September and December at New Delhi are presented. The solar conversion efficiency of 30–60% corresponding to a collection temperature in the range of 40–70°C is reported. The solar gain and heat storage characteristics of the proposed system are found to be of the right order of magnitude for solar water-heating applications.     

太阳常数与太阳辐射的光谱分布

太阳常数 由于地球是沿—椭圆轨道围绕太阳公转的,所以太阳到地球的距离是随时间(也就是随地球在椭圆轨道上的位置)不同而有所差异的,如表1所示。     

Solar assisted biogas digesters I: Thermal analysis

A thermal analysis has been made of a number of viable solar systems, namely (i) a solar canopy, (ii) a shallow solar pond (SSP) water heater, (iii) insulation and (iv) an SSP with a solar canopy around the digester, to boost the biogas production in conventional KVIC biogas plants during the winter months. Numerical calculations for a typical sunny winter day (17 January 1984) in the climate of New Delhi show that an SSP water heater on the top of the gas holder, covered with a solar canopy, is a good option from thermal point of view.     

太阳能空调/热泵系统及运行分析

描述了位于北京天普集团工业园区的太阳能空调/热泵系统及其设计思路。系统以太阳能利用技术为主,热泵技术为辅,可以完全满足新能源示范大楼全年的空调、采暖及生活热水的需要。介绍了系统冬季运行的技术参数,并与其他几种传统的采暖方式进行了经济和环境效益方面的比较。     

Solar still with vapor adsorption basin: Performance analysis

In this work, a vapor adsorption type solar still was designed, fabricated and tested at Thiagarajar College of Engineering, Madurai, India. A vapor adsorbent pipe network comprising activated carbon–methanol pair was integrated with the basin. Losses from the bottom of the still are considerably reduced due to sensible heat absorption by the activated carbon and latent heat of vaporization by methanol. Also water circulated through the inner tube of the adsorbent bed is used as a feed to basin, thus enhancing the evaporation rate during day time. The increase in temperature of the basin due to adsorbent bed and condensation of methanol vapor, augments the evaporation rate during the night time also. Sponges, gravels, sand and black rubbers were used in the vapor adsorption type solar still for improving the yield. Experimental results were compared with ordinary conventional basin type still. The governing energy balance equations for both conventional and vapor adsorption type solar still were solved analytically and compared with experimental results. Theoretical analysis gave very good agreement with experimental results.     

Performance analysis of Azimuth Tracking Fixed Mirror Solar Concentrator

The fixed mirror solar collector (FMSC) fixes reflector and mobiles receiver to collect solar energy. However, this type of concentrator has a low efficiency and short operating duration in practical applications. In this paper, we propose to install the FMSC on an azimuth tracking device (ATFMSC) and the reflectors are arranged by intermission to avoid the shading of neighbor reflector for incidence angle of less than 10° to improve its optical performance. Through the integration of the reflected solar radiation distribution function over any reflection point, and then the whole collector aperture, we develop the analytical expressions of various system efficiencies to numerically simulate the performance of ATFMSC with evacuated tube receiver in different design parameters. It is validated by the ray tracing results. The result shows that the mean annual net heat efficiency of the whole system would be up to 61% with the operating temperature of 400 °C, which is higher than parabolic trough collector and traditional FMSC. This is because the longitudinal incidence angle of ATFMSC always remains zero by tracking the sun azimuth, so the end loss of the concentrator can be avoided and enables it to operate with high efficiency continually.     

Solar cooling technologies in Greece. An economic viability analysis

In Greece, during the summer, the demand for electricity greatly increases because of the extensive use of air-conditioning systems. This is a source of major problems in the country’s electricity supply and contributes to an increase of the CO₂ emissions. The use of solar energy (SE) to drive cooling cycles is attractive since the cooling load is roughly in phase with SE availability. An economic evaluation of two types of solar cooling systems is made (an absorption and an adsorption system). The analyses indicated that, because of their high investment cost, these systems would be marginally competitive with standard cooling systems at present energy prices.