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Scientific Publications Year 2007 for Solar Updraft Chimneys SCPP

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Scientific Publications in English
Title - Author – Reference - Abstract

Dynamic similarity in solar chimney modeling
Solar Energy, Volume 81, Issue 12, December 2007, Pages 1439-1446
Atit Koonsrisuk, Tawit Chitsomboon
Abstract
Dimension less variables are proposed to guide the experimental study of flow in a small-scale solar chimney: a solar power plant for generating electricity. Water and air are the two working fluids chosen for the modeling study. Computational fluid dynamics (CFD) methodology is employed to obtain results that are used to prove the similarity of the proposed dimensionless variables. The study shows that air is more suitable than water to be the working fluid in a small-scale solar chimney model. Analyses of the results from CFD show that the models are dynamically similar to the prototype as suggested by the proposed dimensionless variables.
Article Outline
Nomenclature
1. Introduction
2. Dimensional analysis
3. Engineering interpretation
4. Similarity requirements
5. CFD modeling
6. Results and discussion
7. Conclusion
Acknowledgements
References

2007 Gregor Czisch, Gregor Giebel : Realisable Scenarios for a Future Electricity Supply based 100% on Renewable Energies

PDF Document of 0.4Mo

2007 Reinhard Harte, Gideon P.A.G. Van Zijl: Structural stability of concrete wind turbines and solar chimney towers exposed to dynamic wind action

PDF Document of 0.9Mo
Journal of Wind Engineering and Industrial Aerodynamics, Volume 95, Issues 9-11, October 2007, Pages 1079-1096
Abstract
Apart from burning classical fossil resources or generating nuclear power, alternatives have been developed, like the classical ways to capture energy from wind, water and sun, or the innovative solar chimney concept.
The paper presents some structural aspects of classical wind energy turbines, like their high-cycle dynamic loading and reaction as well as their fatigue behaviour. Actual research results concerning pre-stressed concrete tower constructions for wind turbines will be focused on. For the solar chimney concept the structural challenges concerning wind action, eigenfrequencies, stiffening and shape optimization with special focus on the inlet guide vanes will be discussed. Both classical wind turbines and the innovative solar chimney concept may successfully contribute to the future energy supply in Southern Africa.
Article Outline
1. Classical wind turbines
1.1. Development of wind energy
1.2. Structural challenges
1.3. High-cycle excitation
1.4. Fatigue
1.5. Progressive damages and structural response
2. The innovative solar chimney concept
2.1. Idea
2.2. Wind profile
2.3. Structural integrity
2.4. Wind pressure
2.5. Substructure design
3. Conclusions
Acknowledgements
References


2007 Reuel Shinnar, Francesco Citro: Solar thermal energy: The forgotten energy source

PDF Document of 0.4Mo
Technology in Society, Volume 29, Issue 3, August 2007, Pages 261-270
Abstract
Solar thermal (ST) energy, using trough solar collectors, can be an environmentally friendly and economically competitive electric source for any part of the world (such as the USA) that includes large desert areas. Competitive ST involves trough solar collectors, which concentrate solar rays onto a flowing liquid able to sustain very high temperatures (800°F) without exerting significant vapor pressure or decomposing. This allows the solar energy to be used to raise steam and drive turbines of electricity-generating plants directly, or to be harvested and stored as sensible heat in large underground ponds. The stored portion of the energy can be used instantaneously to meet variable power needs. This technology has been amply demonstrated by a 354 MWe modular plant (consisting of 9 ST units) that has been running in the Mojave Desert for the past 20 years. For intermediate loads (50% of the US electricity requirement) ST energy is already competitive with any new power plant, including old-fashioned coal power plants equipped with scrubbers. ST energy, using trough solar collectors, can become a major technical, financial, and political development.

2007 T.P. Fluri, T.W. von Backström: Comparison of modelling approaches and layouts for solar chimney turbines

PDF Document of 0.4Mo

2007 André G. Ferreira, Cristiana B. Maia, Marcio F.B. Cortez, Ramón M. Valle: Technical feasibility assessment of a solar chimney for food drying

PDF Document of 0.7Mo

2007 Guillermo Zaragoza, Martin Buchholz, Patrick Jochum, Jerónimo Pérez-Parra: Watergy project: Towards a rational use of water in greenhouse agriculture and sustainable architecture

PDF Document of 0.4Mo
Desalination, Volume 211, Issues 1-3, 10 June 2007, Pages 296-303
Abstract
Watergy project is funded by the European Community’s Vth Framework in its Energy, Environment and Sustainable Development programme. It consists of the development of a humid air solar collector system that follows the principle of a closed two phase thermosyphon. A combination of evaporation and condensation allows to use solar thermal energy in a much more efficient way. The main advantage is not only the reduction of costs in space cooling and heating, but the possibility of water purification, as the system can be fed with low quality water to obtain distilled water. The decentralization of heat and water supply opens the possibility of residential areas where greenhouses fed with low quality water (grey water and brackish water) could be used to produce distilled water as well as heat and fruits. The project contemplates the development of two prototypes: one application for arid climates in Southern Europe with an emphasis on water production in the context of greenhouse horticulture, and another for temperate Central European climate focused on heat and water production for sustainable architecture.

2007 Xinping Zhou, Jiakuan Yang, Bo Xiao, Guoxiang Hou: Simulation of a pilot solar chimney thermal power generating equipment

PDF Document of 0.3Mo
Renewable Energy, Volume 32, Issue 10, August 2007, Pages 1637-1644
Abstract
A pilot experimental solar chimney thermal power generating equipment was set up in China. A simulation study was carried out to investigate the performance of the power generating system based on a developed mathematical model. The simulated power outputs in steady state were obtained for different global solar radiation intensity, collector area and chimney height. By intercomparison, it is found that the simulated power outputs are basically in agreement with the results calculated with the measurements, which validates the mathematical model of the solar chimney thermal power generating system. Furthermore, based on the simulation and the specific construction costs at a specific site, the optimum combination of chimney and collector dimensions can be selected for a required electric power output.

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Experimental study of temperature field in a solar chimney power setup
Applied Thermal Engineering, Volume 27, Issues 11-12, August 2007, Pages 2044-2050
Xinping Zhou, Jiakuan Yang, Bo Xiao, Guoxiang Hou
Abstract
A pilot experimental solar chimney power setup consisted of an air collector 10 m in diameter and an 8 m tall chimney has been built. The temperature distribution in the solar chimney power setup was measured. Temperature difference between the collector outlet and the ambient usually can reach 24.1 °C, which generates the driving force of airflow in the setup. This is the greenhouse effect produced in the solar collector. It is found that air temperature inversion appears in the latter chimney after sunrise both on a cool day and on a warm day. Air temperature inversion is formed by the increase of solar radiation from the minimum and clears up some time later when the absorber bed is heated to an enough high temperature to make airflow break through the temperature inversion layer and flow through the chimney outlet.
Article Outline
1. Introduction
2. Experimental procedure
2.1. Building of a pilot setup
2.2. Measuring the temperature distribution
3. Results and discussion
3.1. Temperature field
3.2. Daily variation
4. Conclusion
Acknowledgements
References

2007 Ming Tingzhen, Liu Wei, Xu Guoling, Xiong Yanbin, Guan Xuhu, Pan Yuan: Numerical simulation of the solar chimney power plant systems coupled with turbine

PDF Document of 0.7Mo

Simulation of a pilot solar chimney thermal power generating equipment
Renewable Energy, Volume 32, Issue 10, August 2007, Pages 1637-1644
Xinping Zhou, Jiakuan Yang, Bo Xiao, Guoxiang Hou
Abstract
A pilot experimental solar chimney thermal power generating equipment was set up in China. A simulation study was carried out to investigate the performance of the power generating system based on a developed mathematical model. The simulated power outputs in steady state were obtained for different global solar radiation intensity, collector area and chimney height. By intercomparison, it is found that the simulated power outputs are basically in agreement with the results calculated with the measurements, which validates the mathematical model of the solar chimney thermal power generating system. Furthermore, based on the simulation and the specific construction costs at a specific site, the optimum combination of chimney and collector dimensions can be selected for a required electric power output.
Article Outline
1. Introduction
2. Experimental equipment
3. Mathematical model
4. Results and discussions
5. Conclusion
Acknowledgements
References


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Structural System and Conceptual Model Test of Solar Chimney
Xingqiang Zhang, Xingfei Yuan and Limin Li
Space Structures Research Center, Zhejiang University, Hangzhou 310058, China

Keywords: solar chimney, high-rise structure, structural system, conceptual model, prestress.

Abstract.
The solar chimney power station is a renewable energy system consisting of solar collector, wind turbine, and chimney. To improve the efficiency of energy generation, the higher chimney is the better. Considering the difference between the solar chimney and the traditional high-rise structure, the study on the chimney from the structural point of view is produced in this paper. The existing and planed chimneys are first introduced. Then the solar chimney is classified according to material, structural system, and constraint condition. Followed that, prestress technology is applied to improve the structural behavior. On this basis, conceptual models of three different structural systems are designed, and the performance of the models tested under the horizontal force to show the effect of stayed cable and spokewise cable.

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Scientific Publications in Chinese

2007
太阳能热气流发电系统流道优化研究
Research of the optimization on the geometric dimensions of the solar chimney power plant systems
【作者】 彭维; 明廷臻; 刘伟; 许国良;
【Author】 Peng Wei~1 Ming Tingzhen~2 Liu Wei~2 Xu Guoliang~2
(1 Departement of Power and Energy, Wuhan Institute of Shipbuilding Technology, Wuhan 430050, China;
2 College of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 730074, China)
【机构】 武汉船舶职业技术学院动力系; 华中科技大学能源与动力工程学院; 华中科技大学能源与动力工程学院 湖北武汉430050; 湖北武汉430074;
【摘要】 基于相对压力概念,构建了太阳能热气流发电系统新数学模型,并对西班牙太阳能热气流电站模型进行数值模拟,分析了其流场和温度场,并据此对原始模型进行优化.计算结果表明:通过对发电系统集热棚出口和烟囱进口的局部流道进行优化,使烟囱进口处局部流速增大约14%,温度场更加均匀,相对压力减小约50%,提高了系统做功能力和能量转换效率,同时减少系统能量损失.数值模拟结果为太阳能热气流发电系统的设计和应用提供理论依据. 更多还原
【Abstract】 Based on the concept of relative static pressure, a new mathematical model has been set up to analyze the solar chimney power plant systems. Using the solar chimney prototype in Spain as a practical example, the numerical studies are performed to explore a betterment model according to the velocity, pressure and temperature profiles. The simulation results show that, by optimizing the local geometric dimensions between the collector outlet and the chimney inlet, the local velocity at this place increases by 14%, the temperature profiles are more uniform, and the relative static pressure decreases about 50%, which will improve the ability of energy conversion of the system and reduce the energy losses. The results present a guidance to design a large-scale solar chimney power plant.
【关键词】 太阳能热气流发电系统; 相对压力; 透平; 集热棚; 能量转换效率;
【Key words】 solar chimney power plant systems; relative static pressure; turbine; collector; energy conversion efficiency;
【基金】 教育部重点基金资助项目(104127)
【文献出处】 华中科技大学学报(自然科学版), Journal of Huazhong University of Science and Technology (Nature Science Edition), 编辑部邮箱 , 2007年01期

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2007
太阳能热风发电系统集热器热物理模型及分析
Thermal-physical model and analysis of the collector of the solar chimney
【作者】 卢峰; 张华; 姚秀平; 黄惠兰;
【Author】 LU Feng, ZHANG Hua, YAO Xiu-ping, HUANG Hui-lan (University of Shanghai for Science and Technology, Shanghai 200093, China)
【机构】 上海理工大学; 上海理工大学 上海200093; 上海200093;
【摘要】 集热器是太阳能热风发电系统的重要组成部分。文章建立了集热器的热物理模型,分析了集热器各部分的传热过程和集热器效率的计算方法。介绍了集热器热损失的求解方法,即利用热阻法求解和根据经验公式求解。 更多还原
【Abstract】 The collector is a substantial component of the solar chimney. The thermal-physical model of the collector is established, and the heat transfer processes of the three components of the collector are analyzed. The calculation of the efficiency of the collector is also analyzed. The heat loss and the efficiency are calculated for the particular example.
【关键词】 集热器; 传热过程; 集热器效率;
【Key words】 solar collector; heat transfer; efficiency of collector;
【基金】 国家自然科学基金(50476078); 上海市重点学科(T0503)
【文献出处】 可再生能源, Renewable Energy Resources, 编辑部邮箱 , 2007年02期

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2007
斜坡式热气流发电试验模型的设计
The design of slope hot airflow electricity generating system
【作者】 王娟; 施玉川; 黄国华;
【Author】 WANG Juan SHI Yu-chuan HUANG Guo-hua
(School of Science, Xi’an Jiaotong University, Xi’an 710049, China)
【机构】 西安交通大学理学院太阳能研究所; 西安交通大学理学院太阳能研究所 陕西西安710049; 陕西西安710049;
【摘要】 分析了斜坡式热气流太阳能发电的可行性,介绍了斜坡式热气流发电的组成及基本原理。根据依山而建斜坡式热气流发电系统的思想,设计了一个高4m、宽1.5 m的试验模型。 用有机玻璃做透明盖板材料;用铁板代替山体,在其后面设置了用于调控温度的电阻丝700 W/m2。 阐述了确定该试验模型各部分比例和结构参数的依据。 对设计的试验模型进行了评价:与传统的塔式发电模型相比,该模型具有集热效率高、造价低的优点。 更多还原
【Abstract】 In this paper, the feasibility of a slope solar energy power plant is discussed. Then, the principle and the composing of the slope hot airflow electricity generating system are introduced. Based on the thought of the slope hot air flow system built on the top of the hill, a 4-meters high and 1.5-meters wide experimental-model is designed. The material of the transparent cover is polymethyl methacrylate (PMMA), which has a high transmittance. The iron plate is used as the hill body with a line of 700 W resistance wires to control the temperature of the collector. At last, the designed experimental model is evaluated and the comparison between the traditional chimney model and the slope chimney model is made. It shows that this experimental model has the merits of decreasing the cost and enhancing the efficiency of the system.
【关键词】 斜坡; 热气流发电; 烟囱; 集热棚;
【Key words】 slope; solar energy electricity generating; chimney; collector;
【基金】 国家自然科学基金资助项目(50506025)
【文献出处】 可再生能源, Renewable Energy Resources, 编辑部邮箱 , 2007年06期

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2007
太阳能热风发电系统的空气集热器试验装置的研制
Experimental device setup for solar chimney collector【作者】 张华; 张静敏; 黄惠兰; 卢峰;
【Author】 ZHANG Hua, ZHANG Jing-min, HUANG Hui-lan, LU Feng
(College of Power Engineering,University of Shanghai for Science and Technology, Shanghai 200093, China)
【机构】 上海理工大学动力工程学院; 上海理工大学动力工程学院 上海200093; 上海200093;
【摘要】 根据太阳能热风发电系统集热器的抽象试验研究模型,研制了该系统的空气集热器试验装置,设计了该装置的集热器箱体、太阳能辐射模拟装置、流量和温度测量系统、辐射强度测量系统以及数据采集系统.利用研究装置进行了变太阳辐射强度、变空气流量以及环境温度对空气集热器的热量影响实验,初步试验验证装置的可行性. 更多还原
【Abstract】 The experimental device for solar chimney collector was set up by the way of simplification of the practical solar chimney collector. The experimental device includes the collector trunk, the simulant of solar radiation, the measuring systems of air flow rate and temperature and the data acquisition system. All parts were introduced briefly and some experiments have been done. Temperature differences between the inlet and outlet of the collector and collector efficiency under the conditions of variable solar radiation, air flow rate and ambinent temperature were obtained. The preliminary experiments verify the feasibility of the setup.
【关键词】 太阳能热风发电; 集热器; 试验装置;
【Key words】 solar chimney generating electric; collector; experimental device;
【基金】 国家自然科学基金资助项目(50476078); 上海市重点学科建设资助项目(T0503)
【文献出处】 上海理工大学学报, Journal of University of Shanghai for Science and Technology, 编辑部邮箱 , 2007年04期

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2007
超高太阳能烟囱结构可靠度计算分析
Analysis of the structure reliability of the super-high solar chimney【作者】 卫军; 谈颋; 周锡武; 张晓霞;
【Author】 WEI Jun, TAN Ting, ZHOU Xi-wu, ZHANG Xiao-xia
(School of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074,China)
【机构】 华中科技大学土木工程与力学学院; 华中科技大学土木工程与力学学院 湖北武汉430074; 湖北武汉430074;
【摘要】 太阳能热气流发电是实现大规模开发和利用太阳能的一种新途径。首先采用钢筋混凝土结构的强度分析方法,推导出平截面假定。在分别考虑自重和风荷载的情况下得到超高烟囱混凝土受压破坏状态方程。然后考虑荷载效应,选取钢筋混凝土材料的强度、容重以及标准风压作为基本随机变量和100 a为设计基准期。最后以1000 m超高烟囱为例, 采用蒙特卡罗方法结合MATLAB编程计算出底部直径、壁厚、配筋率和混凝土强度对可靠度指标的影响。 更多还原
【Abstract】Solar chimney electricity is a brand-new way to realize large-scale utilization of solar energy. Firstly in this paper, the plane-section assumption equation of the chimney is applied according to the reinforced concrete strength theory, for the dead weight and the wind load are considered separately to deduce the concrete compressive failure equation. And the ultimate limit state function is established according to combination of these two load. Secondly the standard wind pressure, material strength and concrete density are selected as the main stochastic variables with a 100-year design lifetime. Finally MATLAB programs are set up to calculate a series of structure reliability of a 1000m-example chimney according to the Monte Carlo method, the influence of different bottom diameters, different wall thickness and different steel ratios are indicated.
【关键词】 太阳能发电; 超高烟囱; 结构可靠度; 蒙特卡罗法;
【Key words】 solar chimney electricity; super high chimney; structure reliability; Monte Carlo method;
【文献出处】 广州城市职业学院学报, Journal of Guangzhou City Polytechnic, 编辑部邮箱 , 2007年03期


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