第一届太阳能工程技术应用培训班暨2010年太阳能与建筑相结合峰会将在深圳举办

<正>全球气候变暖催生新经济,低碳经济正在走进世界经济大舞台。近年来世界太阳能产业飞速发展,成为扮靓低碳经济的光鲜角色,太阳能与建筑相结合技术和太阳能工程技术将成为太阳能产业发展的重要制高点。凭借13年太阳能行业研发与制造经验和500多万m~2太阳能供热采暖系统和光伏系统     

普尼太阳能为低碳城市提供太阳能整体解决方案

<正>随着社会经济的发展,人们越来越重视环境保护关注气候变化,世界各国均把节能降耗发展新能源及可再生能源作为发展的重要目标。走低碳城市之路,是节能降耗减缓气候变化的重要途径之一。实现低碳目标要从清洁能源的开发利用和节能减排等方面入手,太阳能光伏发电则因其适用的广泛性成为低碳城市清洁能源的首选,是保证实现低碳城市的重要措施之一。     

太阳能热水器企业"过冬"策略探析

随着世界金融危机的蔓延,我国经济与世界经济一样迎来了一个全新的时代--个经济周期的结束,而下降的周期已经来临.这引发了我们思考宏观经济对太阳能热水器产业的影响,以及众多太阳能热水器企业在经济下行周期中如何调整自己经营战略的关注.太阳能热水器产业连续10年以25%左右的速度迅速发展,而我国经济即将进入下行周期,众多的太阳能热水器企业应采用怎样的经营策略,如何避免在"冬天"倒下,继续保持快速的发展,成为决定企业乃至行业发展的关键.     

太阳能——二十一世纪的重要能源

据预测,到21世纪,世界的能源结构将发生重大变化,太阳能将逐渐代替常规能源,成为不可缺少的重要能源:21世纪上半叶,制约太阳能大规模利用的技术经济因素将得到克服,其成本将与常规能源相当,甚至更低;到21世纪中叶,预计太阳能将满足世界能源总需要量的10％,而到21世纪末,太阳能所占的份额将增加到20—30％,同时将形成一个庞大的太阳能产业,其经济规模将超过目前的一些支柱产业。我国三分之二以上的面积处于太阳能资源较丰富区,具有开发利用太阳能的优越条件。70年代以来,我国太阳能利用事业发展较快。在太阳能科学研究和     

中国太阳能产业面临五大瓶颈

中国太阳能产业的快速发展，受到了世界的关注。据悉，中国太阳能集热器保有量已占全世界的76％，并成为世界上太阳能集热器最大的生产和使用国。业内人士认为，当前中国太阳能产业发展仍存在一些障碍，太阳能产业的发展要实现量到质的转变，仍需突破“五大瓶颈”。     

2011中国(泰州)太阳能产业高层论坛顺利召开

太阳能是未来低碳社会的理想能源之一,据国外新能源研究机构最新数据显示;2011年全球太阳能光伏系统安装增长了24％,总装机容量达到24GW.其中欧洲仅增长3％,美国和亚洲加速了全球安装量的膨胀.2011年,意大利光伏新产能为6.8GW,将取代德国成为世界最大的太阳能光伏系统安装市场.美国将成为世界第三大太阳能市场,中国紧随其后成为世界第四大市场(预计今年中国的安装量将达到2.5GW).     

国际金属太阳能产业联盟成立

<正>近日,由国际铜业协会牵头的"国际金属太阳能产业联盟"成立大会在北京饭店隆重举行。该联盟将为政府机构、房地产开发商提供服务,推荐优秀的太阳能热利用产品、供应商和以高效、耐用的太阳能热水系统为主的低碳能源整体解决方案。     

太阳能发电发展“十二五”规划

前言太阳能资源丰富,分布广泛,开发利用前景广阔。太阳能发电作为太阳能利用的重要方式,已经得到世界各国的普遍关注。近几年,太阳能发电技术进步很快,产业规模持续扩大,发电成本不断下降,在全球已实现较大规模应用。在国际市场的带动下,我国太阳能光伏产业快速发展,光伏技术和成本上均已形成一定的国际竞争力。从发展趋势看,太阳能发电即将成为技术可行、经济合理、具备规模化发展条件的可再生能源,对我国合理     

发展太阳能行业促进低碳经济

阐述"低碳经济"的概念和对人类可持续发展的重要意义,论证太阳能的应用是促进低碳经济发展的主要途径。总结太阳能的主要应用方面:太阳能发电、光热利用、太阳能动力以及太阳能住宅。着重论述太阳能光伏发电的方式及技术。     

太阳能光热利用多路突围

在未来的时间里,太阳能光热在节能减排进程中会发挥更大的作用。而就目前太阳能光热市场而言,技术产品更新较慢已经成为限制行业发展的一大因素。"23日,在由中国太阳能热利用产业联盟等机构主办的"全国太阳能热水系统产品升级、更新、换代发展暨太阳能与建筑结合质量提升论坛"上,该联盟执行理事长张晓黎认为,技术创新、产品升级、市场整合将成为中国太阳能光热产业未来一段时间内所面临的主要课题。经济导报记者注意到,随着中国经济转入"新常     

All-ceramic solar collector and all-ceramic solar roof

A type of all-ceramic solar collector is introduced. These all-ceramic solar collectors are made from ceramics. The material of absorber coating is V–Ti black ceramic. The solar absorptance of absorber coatings with a reticular formation is in the range of 0.93–0.97, without the attenuation of solar absorptance. The fluid passages are integrated with the absorber plate, which naturally formed in the process of shaping. The integration between fluid passage and absorber plate is good to transfer heat from the absorber plate to the fluid. The thermal efficiency of all-ceramic solar system is more than 50%. The all-ceramic solar system can integrate well with building roof. All-ceramic collector and system are characterized by low cost and long lifetime. Such characteristics reduce the cost of solar energy utilization.     

Measurement of solar radiation by silicon solar cell

Investigations into the use of a silicon solar cell to measure solar radiation intensity are described. The effect of optical path length ratio and atmospheric constituents are discussed. A survey is made of other photovoltaic devices. It is concluded that, on presently available data, the silicon cell is the most suitable for the purpose.

Comparisons are made between the signals obtained from a silicon-solar-cell radiometer and a Kipp thermopile type solarimeter used as a standard. One set of comparisons is made for 30-minute intervals on clear days and is analysed so that known effects due to angle of incidence are allowed for and variations in the signals caused by spectral quality of the radiation can be separated. This set of comparisons shows an extreme spread of ±13 percent on a reference constant determined for midday clear sky. This extreme spread includes variations of +6.5 to −3 percent at midday together with variations during the course of any one day.

A second set of comparisons made during whole days or long periods, during which conditions were stable, gave rise to two calibration constants, one for clear-sky and one for overcast-sky conditions.

If an over-all calibration constant is desired for all conditions, then a value of 15.79 mA cm⁻² min/Langley is obtained with a probable error of to percent. The skew effect here is because more readings were taken for clear-sky conditions, thus favoring the lower constant for these conditions.     

China Solar OEM助力开发美国太阳能市场

China Solar OEM公司位于美国西岸加州洛杉矶地区.这里一年四季拥有世界最美丽的阳光,海运、空运、陆运非常快捷便利,拥有大片土地,可直接用于太阳能项目开发.为帮助中国客户进入美国市场、立足并拓展生意,China Solar OEM将竭诚提供以下专案服务:     

Monochromatic versus solar efficiencies of organic solar cells

The photovoltaic behavior in a perylene/phthalocyanine hetero-p/n-junction solar cell was investigated using intensity-dependent I/V-characteristics and short circuit photocurrent spectroscopy. It is concluded that the charge carrier generation occurs only in a very thin active region at the contact. By optimizing the light trapping, a maximum solar AM 1.5 efficiency of about 2% can be obtained. A further increase requires better material properties or new cell structures.     

Calculating the solar contribution to solar assisted systems

After summarizing the methods for calculating the solar contribution for systems without thermal storage, this paper extends a previously proposed method which is based on using a frequency distribution of insolation data. This extension allows rapid hand calculation of solar contribution for most collector types and for any specified collector inlet and outlet temperatures. Typical results are shown to be accurate to within 1 per cent relative to dynamic computer simulation methods. The effect on the method of collector orientation and tilt is discussed, and a simple method of determining the maximum possible (i.e. infinite collector area) solar contribution for a given collector system is described.     

Concentration of the solar radiation in a solar furnace

Energy concentration in a solar furnace is greatly influenced by the optical accuracy of the reflecting surface of the mirror. The highest density of a heat flux on the heating surface of a specimen is determined by its concentration and by the reflectivity of the mirror.

Since the apparent diameter of the moon is almost equal to that of the sun and the illumination of the moon may be adapted to the photographic determination of flux density, the rate of energy concentration in the authors' solar furnace was studied by the moon's image projected upon the heating zone in place of that of the sun.

As a result, about 300 watts per cm was obtained as the highest possible density of the heat flux in this solar furnace. This figure also agreed with the results of an optical analysis based on the practical finishing of the present mirror surface. With a heat flux of 300 watts per sq cm, in accordance with Stefan-Boltzmann's law of radiation, the highest temperature attainable is estimated to be approximately 2700°K. Besides the above, in actual experiment, approximately 2300°C was obtained in observing the melting points of binary mixtures, e.g., MgO---CoO and MgO---Cr₂O₃. Thus, the above-mentioned three approaches to the problem are in fairly good agreement.     

Developing solar : PV solar system markets in Africa

Governments, NGO's and UN organisations are increasingly convinced that renewable energies not only help to solve energy problems in Africa but are indispensable in alleviating regional disparities, social problems and bridging the digital gap. Still, many years after introducing high efficiency solar PV systems the necessary breakthrough of implementing them on a mass scale is still not a reality. Karim Asali, Kyocera Fineceramics GmbH, provides perspectives on developing solar PV in Africa.     

Bias-dependent high saturation solar LBIC scanning of solar cells

A light beam-induced current measurement system that uses concentrated solar radiation as a beam probe to map spatially distributed defects on a solar cell has been developed and tested [F.J. Vorster, E.E. van Dyk, Rev. Sci. Instrum., submitted for review]. The induced current response from a flat plate EFG Si solar cell was mapped as a function of surface position and cell bias by using a solar light beam induced current (S-LBIC) mapping system while at the same time dynamically biasing the whole cell with an external voltage. This paper examines the issues relating to transient capacitive effects as well as the electrical behaviour of typical solar cell defect mechanisms under spot illumination. By examining the bias dependence of the S-LBIC maps, various defect mechanisms of photovoltaic (PV) cells under concentrated solar irradiance may be identified. The techniques employed to interpret the spatially distributed IV curves as well as initial results are discussed.     

Thermal-photovoltaic solar hybrid system for efficient solar energy conversion

A hybrid solar system with high temperature stage is described. The system contains a radiation concentrator, a photovoltaic solar cell and a heat engine or thermoelectric generator. Two options are discussed, one with a special PV cell construction, which uses the heat energy from the part of solar spectrum not absorbed in the semiconductor material of the cell; the other with concentration of the whole solar radiation on the PV cell working at high temperature and coupled to the high temperature stage. The possibilities of using semiconductor materials with different band gap values are analyzed, as well as of the different thermoelectric materials. The calculations made show that the proposed hybrid system could be practical and efficient.     

Comparison between solar distillers with and without solar concentrator

In order to desalinate sea water by only solar energy using they were designed and built three distillers in which experimental measurements were taken to calculate production, performance and cost. Distillers by solar concentration are: a parabolic trough distiller (PTD) and a Fresnel linear distiller (FLD), and a stepped basin distiller (SBD). As a result, fresh water production under similar climatic conditions was 990 cm³/m²/day with an efficiency of 45.8% for the PTD, 855 cm³/m²/day with 38% of efficiency for the FLD and 5910 cm³/m²/day with an efficiency of 4.4% for the SBD. That is, although the SBD has 10 times lower efficiency than the PTD, it produces almost 6 times more fresh water per m² of distiller’s surface. Regarding the cost of production of each liter of desalinated water, it was calculated in € 0.086, € 0.103 and € 0.034 for the PTD, FLD and SBD, respectively.