太阳能热发电技术与系统

我国对大规模太阳能热发电技术的研究仍处于起步阶段,而国外则已进行了多年的研究.本文介绍了各类太阳能热发电技术及其系统,总结了国内外一些学者的研究成果,比较了各类太阳能热发电技术的优缺点.塔式和槽式技术最适用于大规模太阳能热系统.碟式太阳能热发电装置功率较小,适用于分布式能源系统.其它太阳能热发电技术仍处在试验研究阶段.今后的研究重点主要是塔式太阳能热发电系统的系统集成技术和槽式真空吸热管技术.     

碟式聚光太阳热发电技术

太阳热发电技术是利用太阳集热器把太阳能聚集起来,将工质加热到一定的温度,驱动热机带动发电机发电。由于整个系统的热源来自太阳能,所以称为太阳热发电技术。太阳能热发电系统一般由聚光系统、集热系统、热传输系统、蓄热贮能系统、热机系统等组成。当前太阳热发电技术主要有以下5种:(1)中央塔式(2)槽式(3)单碟独立电站和碟群体系(4)太阳烟囱(5)太阳池。本文通过介绍国外碟式太阳热发电技术的现状及发展趋势,提出发展我国碟式热发电技术的建议与思考。1碟式太阳热发电技术的历史与现状a.碟式热发电系统现代碟式太阳能热发电技术在20世纪70…     

定日镜自动控制系统设计应用

一前言 目前中国太阳能低温热利用已经走到了世界的前列,中国的发展模式得到了世界的关注和认可,然而我国的太阳能发电技术还只是处于起步阶段.太阳能发电的两种形式是太阳能光伏发电和太阳能热发电,太阳能热发电在国外有几十年的发展历史,在我国还只是一个新兴的产业.太阳能热发电的三种主要形式是塔式、槽式和碟式,其中塔式高温热发电具有能大规模推广,实现产业化的优点,发展前景比较广阔.     

太阳能热发电系统的研究开发现状

太阳能热发电是一种很有发展前景的大规模太阳能利用技术。介绍和分析了国内外塔式、槽式、碟式等太阳能热发电技术的研究状况,分析了这些技术的优缺点以及一些改进方案。结合我国国情,指出了我国太阳能热发电所面临的问题及挑战;根据我国可再生能源发展规划,分析了我国太阳能热发电技术的发展前景。     

酒泉光热发电的预想

介绍塔式、槽式、碟式3种主要类型的太阳能热发电系统的工作原理,并对各类太阳能热发电技术的优缺点进行了比较,最后得出太阳能热发电在酒泉地区发展的优势.     

酒泉光热发电的预想

介绍塔式、槽式、碟式3种主要类型的太阳能热发电系统的工作原理,并对各类太阳能热发电技术的优缺点进行了比较,最后得出太阳能热发电在酒泉地区发展的优势。     

国内太阳能热发电技术发展与应用现状

本文主要介绍国内太阳能热发电技术发展情况、工程应用现状及设备生产能力概况,并对塔式、槽式、碟式、菲涅尔式4种主流的太阳能热发电技术进行了简要分析和比较,旨在基于我国太阳能热发电实际情况给出未来发展和研究方向的建议.     

太阳能热发电系统与分类(1)

本文扼要概述太阳能热发电系统的基本概念,并在全面分析现有相关系统集成原则和特点的基础上,提出两个层面的系统分类思路与方法。一方面,按太阳能聚光集热过程的本质特征,主要分为五种类型:塔式、槽式、碟式、太阳能热气流与太阳能热池等发电系统;另一个方面按能源转化利用模式的本质特征,主要分为三种类型:单纯太阳能发电系统、太阳能与化石能源综合互补系统和太阳能热化学复合系统等。     

介绍一种新型的太阳能超低温光热发电技术

本文经上海彧华新能源科技有限公司和发明人授权,介绍了一种以"超低温发电技术"为核心的完全新型的太阳能超低温光热发电技术路线(简称新技术),该新技术完全不同于现有以槽式、塔式、碟式和菲涅尔式为代表的4种主流中高温光热发电技术路线,或将成为我国新能源发展的一个方向。     

太阳能光热发电技术发展现状

介绍太阳能光热发电技术系统：塔式、槽式和碟式3种太阳能光热发电系统,对各类太阳能光热发电技术与常规发电技术进行分析对比,阐述3种太阳能光热发电技术的发展现状及其存在的问题,说明太阳能光热发电具有的广阔应用前景。     

New power generation technology options under the greenhouse gases mitigation scenario in China

Climate change has become a global issue. Almost all countries, including China, are now considering adopting policies and measures to reduce greenhouse gas (GHG) emissions. The power generation sector, as a key source of GHG emissions, will also have significant potential for GHG mitigation. One of the key options is to use new energy technologies with higher energy efficiencies and lower carbon emissions. In this article, we use an energy technology model, MESSAGE-China, to analyze the trend of key new power generation technologies and their contributions to GHG mitigation in China. We expect that the traditional renewable technologies, high-efficiency coal power generation and nuclear power will contribute substantially to GHG mitigation in the short term, and that solar power, biomass energy and carbon capture and storage (CCS) will become more important in the middle and long term. In the meantime, in order to fully bring the role of technology progress into play, China needs to enhance the transfer and absorption of international advanced technologies and independently strengthen her ability in research, demonstration and application of new power generation technologies.     

Modeling the potential for thermal concentrating solar power technologies

In this paper we explore the tradeoffs between thermal storage capacity, cost, and other system parameters in order to examine possible evolutionary pathways for thermal concentrating solar power (CSP) technologies. A representation of CSP performance that is suitable for incorporation into economic modeling tools is developed. We also combined existing data in order to estimate the global solar resource characteristics needed for analysis of CSP technologies. We find that, as the fraction of electricity supplied by CSP technologies grows, the application of thermal CSP technologies might progress from current hybrid plants, to plants with a modest amount of thermal storage, and potentially even to plants with sufficient thermal storage to provide base load generation capacity. The regional and global potential of thermal CSP technologies was then examined using the GCAM long-term integrated assessment model.     

Solar thermal aided power generation

Fossil fuel based power generation is and will still be the back bone of our world economy, albeit such form of power generation significantly contributes to global CO₂ emissions. Solar energy is a clean, environmental friendly energy source for power generation, however solar photovoltaic electricity generation is not practical for large commercial scales due to its cost and high-tech nature. Solar thermal is another way to use solar energy to generate power. Many attempts to establish solar (solo) thermal power stations have been practiced all over the world. Although there are some advantages in solo solar thermal power systems, the efficiencies and costs of these systems are not so attractive. Alternately by modifying, if possible, the existing coal-fired power stations to generate green sustainable power, a much more efficient means of power generation can be reached. This paper presents the concept of solar aided power generation in conventional coal-fired power stations, i.e., integrating solar (thermal) energy into conventional fossil fuelled power generation cycles (termed as solar aided thermal power). The solar aided power generation (SAPG) concept has technically been derived to use the strong points of the two technologies (traditional regenerative Rankine cycle with relatively higher efficiency and solar heating at relatively low temperature range). The SAPG does not only contribute to increase the efficiencies of the conventional power station and reduce its emission of the greenhouse gases, but also provides a better way to use solar heat to generate the power. This paper presents the advantages of the SAPG at conceptual level.     

灵活智慧火电支撑上海城市能源转型发展

火力发电是我国电力供应的主力,可再生能源发电的大比例消纳也需要火电来灵活调峰。灵活智慧火电是火力发电转型发展的新方向,我国灵活智慧火电技术的系统性研究和应用还处于起步阶段。通过梳理灵活智慧火电面临的技术问题,分析上海发展灵活智慧火电的需求和优势,提出灵活智慧火电技术发展方向和配套政策措施的建议,为上海火电行业未来发展提供参考。     

太阳能光热与常规能源相结合的发电技术

文章介绍了国内外太阳能光热发电现状,对太阳能光热与常规能源相结合的发电技术进行了描述。分析了目前几种光热与常规能源结合的发电方法,对其适用范围、发展潜力和技术难点进行了评估。     

聚光太阳能发电技术应用与前景

分析了聚光太阳能发电三大技术（线性聚光系统、碟/引擎系统、电力塔系统）以及热能储存系统,阐述了其结构、工作原理与研究方向,比较了这三大技术之间的经济技术性能,介绍了适合我国太阳能辐射量大的边远地区碟/引擎系统的应用,展示了太阳能热发电技术的应用前景及对节能减排的贡献。     

Solar district heating and cooling: A review

Both district heating and solar collector systems have been known and implemented for many years. However, the combination of the two, with solar collectors supplying heat to the district heating network, is relatively new, and no comprehensive review of scientific publications on this topic could be found. Thus, this paper summarizes the literature available on solar district heating and presents the state of the art and real experiences in this field. Given the lack of a generally accepted convention on the classification of solar district heating systems, this paper distinguishes centralized and decentralized solar district heating as well as block heating. For the different technologies, the paper describes commonly adopted control strategies, system configurations, types of installation, and integration. Real‐world examples are also given to provide a more detailed insight into how solar thermal technology can be integrated with district heating. Solar thermal technology combined with thermally driven chillers to provide cooling for cooling networks is also included in this paper. In order for a technology to spread successfully, not only technical but also economic issues need to be tackled. Hence, the paper identifies and describes different types of ownership and financing schemes currently used in this field.     

Evaluation of distributed building thermal energy storage in conjunction with wind and solar electric power generation

Energy storage is often seen as necessary for the electric utility systems with large amounts of solar or wind power generation to compensate for the inability to schedule these facilities to match power demand. This study looks at the potential to use building thermal energy storage as a load shifting technology rather than traditional electric energy storage. Analyses are conducted using hourly electric load, temperature, wind speed, and solar radiation data for a 5-state central U.S. region in conjunction with simple computer simulations and economic models to evaluate the economic benefit of distributed building thermal energy storage (TES). The value of the TES is investigated as wind and solar power generation penetration increases. In addition, building side and smart grid enabled utility side storage management strategies are explored and compared. For a relative point of comparison, batteries are simulated and compared to TES. It is found that cooling TES value remains approximately constant as wind penetration increases, but generally decreases with increasing solar penetration. It is also clearly shown that the storage management strategy is vitally important to the economic value of TES; utility side operating methods perform with at least 75% greater value as compared to building side management strategies. In addition, TES compares fairly well against batteries, obtaining nearly 90% of the battery value in the base case; this result is significant considering TES can only impact building thermal loads, whereas batteries can impact any electrical load. Surprisingly, the value of energy storage does not increase substantially with increased wind and solar penetration and in some cases it decreases. This result is true for both TES and batteries and suggests that the tie between load shifting energy storage and renewable electric power generation may not be nearly as strong as typically thought.     

Saturated steam process with direct steam generating parabolic troughs

The direct steam generation (DSG) in parabolic trough collectors is an attractive option regarding the economic improvement of parabolic trough technology for solar thermal electricity generation in the multi Megawatt range. The European DISS project has proven the feasibility of the direct steam generation under real solar conditions in more than 4000 operation hours. Within the European R&D project INDITEP the detailed engineering for a pre-commercial DSG solar thermal power plant with an electrical power of 5 MW is being performed. This small capacity was chosen to minimise the risk for potential investors.In regards to DSG solar thermal power plants, only steam cycles using superheated steam have been investigated so far. The paper will investigate the advantages, disadvantages, and design considerations of a steam cycle operated with saturated steam for the first time. For near term applications, saturated steam operated DSG plants might be an interesting alternative for power generation in the small capacity range due to some specific advantages:

• Simple set up of the collector field.

• Proven safe collector field operation.

• Higher thermal efficiency in the collector field.

A technological evolution from bulk crystalline age to multilayers thin film age in solar photovoltaics

Recent advances in solar cell device technologies are surveyed, and a new trend underlying is predicted by a term “technological evolution from the bulk crystalline age to the multilayered thin film age”. In the paper, firstly, recent progress of thin film fabrication technologies for active materials of photovoltaic device are reviewed, and their significancies such as wide area, low temperature growth etc., are pointed out from currently developed live technologies. Secondly, some R & D efforts to develop the next generation type solar cells utilized by full use of multi-layers thin film growth technology are introduced together with some newly developed integrated process technology for the thin film solar cells. Then, some topics in the high cost performance multi-layers thin film solar cells are also introduced. In the final part of this paper, the current state of the art in the field of thin film solar cells and their industrialization are overviewed and the market expansion toward the 21st century is forecast, and discussed.