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Scientific Publications Year 2010 for Solar Updraft Chimneys

The 3rd International Conference on Solar Updraft Tower Power will take place from 26 to 28 October, 2012 at Huazhong University of Science and Technology, in Wuhan, China.
The homepage of the 3rd International Conference on Solar Updraft Tower Power Technology 2012 (SUTPT 2012) is available at http://www.sutpt2012.org .


Performance of solar chimney power plant in Qinghai-Tibet Plateau
Renewable and Sustainable Energy Reviews, Volume 14, Issue 8, October 2010, Pages 2249-2255
Xinping Zhou, Fang Wang, Jian Fan, Reccab M. Ochieng
Abstract
A solar chimney power plant (SCPP) is proposed to be built in Qinghai-Tibet Plateau where there is abundant solar radiation, high direct solar radiation low atmospheric temperature, large diurnal temperature range, and lots of salt lakes working as heat storage system, which can help to improve the power output of SCPP. The plant is expected to power local railway traffic lines and act as a solar power base to supply power for national development. The performance of the SCPP that will be built in Qinghai-Tibet Plateau is analyzed and power potential estimated by developing a simple mathematical model. It is found that SCPP if built in the plateau can produce twice more power than an SCPP built on the same latitude of other regions. The yearly power potential for SCPP in Qinghai-Tibet Plateau is estimated to be 86.8 million TJ. When 10–20% of the plateau land is used for the SCPP, the yearly power output may reach 8.7 million TJ to 17.4 million TJ, accounting for 10.7–21.3% of China's energy consumption in 2008 which stood at 81.6 million TJ. It is found that the SCPP in the plateau can support local and national development together with other renewable energy resources such as hydroelectric power and wind power.

Constructal solar chimney configuration
International Journal of Heat and Mass Transfer, Volume 53, Issues 1-3, 15 January 2010, Pages 327-333
A. Koonsrisuk, S. Lorente, A. Bejan
Abstract
In this study, we describe the constructal-theory search for the geometry of a solar chimney. The objective is to increase the power production over the area occupied by the plant. The ratio height/radius, maximum mass flow rate and maximum power under the constraints of a fixed area and volume are determined. We find that the power generated per unit of land area is proportional to the length scale of the power plant. The analysis is validated by a detailed mathematical model. Pressure losses are reported in terms of the dimensionless length scale of the system, and are illustrated graphically. They indicate that the pressure drop at the collector inlet and at the transition section between the collector and chimney are negligible, and the friction loss in the collector can be neglected when the svelteness (Sv) of the entire flow architecture is greater than approximately 6.

Analysis of a solar chimney power plant in the Arabian Gulf region
Renewable Energy, In Press, Corrected Proof, Available online 26 May 2010
Mohammad O. Hamdan
Abstract
A simplified thermodynamics analytical model for steady airflow inside a solar chimney is performed. A simplified Bernoulli equation combined with fluid statics and ideal gas equation was implemented and solved using EES solver to predict the performance of the solar chimney power plant. The analytical model matched the experimental data and numerical study available in the literature. The developed analytical model was used to evaluate the effect of geometric parameters on the solar plant power generation. The analysis showed that chimney height and turbine pressure head are the most important physical variables for the solar chimney design. The study showed that second-law efficiency has non-monotonic relation with turbine pressure head. The model shows that second-law efficiency and power harvested increase with the increase of chimney height and/or diameter. The developed model is used to analyze the feasibility of solar chimney power plants for the UAE climate which possesses typical characteristics of the Gulf climate. The solar characteristics of the UAE are shown along with characteristic meteorological data. A solar chimney power plant with a chimney height of 500 m and a collector roof diameter of 1000 m would produce at least 8 MW of power. The amount of power produced during the summer would be higher where the demand in the Gulf area is the highest.

Comparison of classical solar chimney power system and combined solar chimney system for power generation and seawater desalination
Desalination, Volume 250, Issue 1, 1 January 2010, Pages 249-256
Xinping Zhou, Bo Xiao, Wanchao Liu, Xianjun Guo, Jiakuan Yang, Jian Fan
Abstract
An alternative method of heat and moisture extraction from seawater under the collector of a solar chimney system for power generation and seawater desalination is investigated with the aim of estimating the output of power and fresh water when used in seawater desalination using one-dimensional compressible flow model. It is found that the temperature and velocity of the airflow inside the chimney in the combined plant is less than that inside the chimney in the classic plant due to the release of vapor latent heat as the air rises up the chimney. Additionally, the power output from air turbine generators and water generators in the combined plant is less than that of the classic plant. Furthermore, a revenue analysis based on the price of fresh water and electric power in Dalian, China shows that the chimney less than 445 m high for the proposed combined solar chimney power plant having a collector 3000 m in radius is more economical than for the classic plant. The critical chimney height is found to depend on the local price of fresh water and electricity.

A simplified analytical approach for evaluation of the optimal ratio of pressure drop across the turbine in solar chimney power plants
Applied Energy, Volume 87, Issue 2, February 2010, Pages 587-591
S. Nizetic, B. Klarin
Abstract
In this paper, a simplified analytical approach for evaluating the factor of turbine pressure drop in solar chimney power plants is presented. This characteristic factor (or pressure drop ratio in turbines, according to the total pressure drop in the chimney) is important because it is related to the output power. The determined factor (or ratio) values of the turbine pressure drop are found to be within a value range consistent with other studies. It was concluded that for solar chimney power plants, turbine pressure drop factors are in the range of 0.8–0.9. This simplified analytical approach is useful for preliminary analysis and fast evaluation of the potential of solar chimney power plants.

Evaluation of operational control strategies applicable to solar chimney power plants
Solar Energy, Volume 84, Issue 2, February 2010, Pages 277-288

Marco Aurélio dos Santos Bernardes, Theodor W. von Backström
Abstract
Numerical simulations are carried out to study the performance of two schemes of power output control applicable to solar chimney power plants. Either the volume flow or the turbine pressure drop is used as independent control variable. Values found in the literature for the optimum ratio of turbine pressure drop to pressure potential vary between 2/3 and 0.97. It is shown that the optimum ratio is not constant during the whole day and it is dependent of the heat transfer coefficients applied to the collector. This study is a contribution towards understanding solar chimney power plant performance and control and may be useful in the design of solar chimney turbines.

Performance analysis of a solar chimney power plant in the southwestern region of Algeria
Renewable and Sustainable Energy Reviews, Volume 14, Issue 1, January 2010, Pages 470-477
Salah Larbi, Amor Bouhdjar, Toufik Chergui
Abstract
In this paper, we present the performance analysis of a solar chimney power plant expected to provide the remote villages located in Algerian southwestern region with electric power. Solar energy and the psychometric state of the air in the south of Algeria are important to encourage the full development of solar chimney power plant for the thermal and electrical production of energy for various uses. We are interested in Adrar where solar radiation is better than other areas of Algeria. The obtained results show that the solar chimney power plant can produce from 140 to 200 kW of electricity on a site like Adrar during the year, according to an estimate made on the monthly average of sunning. This production is sufficient for the needs of the isolated areas.

Numerical analysis on the performance of solar chimney power plant system
Energy Conversion and Management, Volume 52, Issue 2, February 2011, Pages 876-883
Guoliang Xu, Tingzhen Ming, Yuan Pan, Fanlong Meng, Cheng Zhou
Abstract
Power generating technology based on renewable energy resources will definitely become a new trend of future energy utilization. Numerical simulations on air flow, heat transfer and power output characteristics of a solar chimney power plant model with energy storage layer and turbine similar to the Spanish prototype were carried out in this paper, and mathematical model of flow and heat transfer for the solar chimney power plant system was established. The influences of solar radiation and pressure drop across the turbine on the flow and heat transfer, output power and energy loss of the solar chimney power plant system were analyzed. The numerical simulation results reveal that: when the solar radiation and the turbine efficiency are 600 W/m2 and 80%, respectively, the output power of the system can reach 120 kW. In addition, large mass flow rate of air flowing through the chimney outlet become the main cause of energy loss in the system, and the collector canopy also results in large energy loss.

Thermo-hydrodynamic aspect analysis of flows in solar chimney power plants — A case study
Renewable and Sustainable Energy Reviews, Volume 14, Issue 5, June 2010, Pages 1410-1418
Toufik Chergui, Salah Larbi, Amor Bouhdjar
Abstract
The purpose of the work presented in this study is related to heat transfer and airflow modelling analysis in solar chimneys, according to some dominant parameters. A typical case of application is given in this study. It consists in analyzing a natural laminar convective heat transfer problem taking place in a chimney. Heat transfer and fluid dynamic aspects of the airflow, through an axis symmetric system in a dimensionless form, with well defined boundary conditions is thus examined. Results are related to the temperature distribution and the velocity field in the chimney and in the collector, determined by solving the energy equation, and the Navier–Stokes equations, using finite volume method. The numerical code based on this modelling is validated through the Vahl Davis benchmark solution for natural convection and to other authors for other cases.

Surface reflectance and conversion efficiency dependence of technologies for mitigating global warming
Renewable Energy, In Press, Corrected Proof, Available online 3 December 2010
Ian Edmonds, Geoff Smith
Abstract
A means of assessing the relative impact of different renewable energy technologies on global warming has been developed. All power plants emit thermal energy to the atmosphere. Fossil fuel power plants also emit CO2 which accumulates in the atmosphere and provides an indirect increase in global warming via the greenhouse effect. A fossil fuel power plant may operate for some time before the global warming due to its CO2 emission exceeds the warming due to its direct heat emission. When a renewable energy power plant is deployed instead of a fossil fuel power plant there may be a significant time delay before the direct global warming effect is less than the combined direct and indirect global warming effect from an equivalent output coal fired plant – the “business as usual” case. Simple expressions are derived to calculate global temperature change as a function of ground reflectance and conversion efficiency for various types of fossil fuelled and renewable energy power plants. These expressions are used to assess the global warming mitigation potential of some proposed Australian renewable energy projects. The application of the expressions is extended to evaluate the deployment in Australia of current and new geo-engineering and carbon sequestration solutions to mitigate global warming. Principal findings are that warming mitigation depends strongly on the solar to electric conversion efficiency of renewable technologies, geo-engineering projects may offer more economic mitigation than renewable energy projects and the mitigation potential of reforestation projects depends strongly on the location of the projects.

Low pressure solar thermal converter
Renewable Energy, Volume 35, Issue 1, January 2010, Pages 318-321
Gerald Müller
Abstract
The current development of solar power converters with air as working fluid focuses mostly on concentrating collectors combined with hot-air engines, and on very low temperature solar tower concepts. Whilst concentrating collectors and Stirling engines need complex technology, solar tower converters have very low efficiencies and require large installations. Pressurized containers as energy converters offer the advantage of simplicity, but appear not to have been investigated in detail. In order to assess their performance potential, an idealised thermal pressure converter was analysed theoretically. Two improvements to increase the initially low efficiency derived from theory were found. Neglecting losses, maximum theoretical efficiencies ranged from 6.7% for a temperature difference of 60 K to 17.7% for a difference of 195 K. The low pressure solar thermal converter appears to offer development potential for low-tech solar energy conversion.

A review of solar chimney power technology
Renewable and Sustainable Energy Reviews, Volume 14, Issue 8, October 2010, Pages 2315-2338
Xinping Zhou, Fang Wang, Reccab M. Ochieng
Abstract
Utilization of solar chimney (SC) for power generation has proved to be a promising approach for future applications. This paper provides a comprehensive picture of research and development of SC power technology in the past few decades. The description, physical process, experimental and theoretical study status, and economics for the conventional SC power technology are included as well as descriptions of other types of SC power technology.
Article Outline
1. Introduction
2. Description
2.1. Solar collector
2.2. PCU
2.3. SC
3. Physical process
3.1. Solar collector
3.2. Solar chimney (tower)
3.3. PCU and power output
3.3.1. Pressure drop at the turbine
3.3.2. PCU efficiency
3.3.2.1. Intake losses
3.3.2.2. Turbine losses
3.3.2.3. Diffusion losses
3.3.2.4. Mixing losses
3.3.2.5. HTVTS losses
3.3.2.6. Other aerodynamic losses
3.3.2.7. Drive train losses
3.3.2.8. Total PCU losses
3.4. Outflow from SC into atmosphere
4. Study status
4.1. Experiment studies
4.2. Theoretical studies
5. Economics
5.1. Economics for power generation
5.2. Additional revenues

6. Other types of SC power technology
6.1. Floating SC power technology
6.2. SC power technology with sloped collector
6.3. SC power technology with mountain hollow
6.4. SC power technology for harvesting atmospheric water
6.5. Other combined SC power technologies

7. Discussions and conclusions
Acknowledgements
References


A review of solar thermal technologies
Renewable and Sustainable Energy Reviews, Volume 14, Issue 1, January 2010, Pages 312-322
Mirunalini Thirugnanasambandam, S. Iniyan, Ranko Goic
Abstract
The use of solar energy in recent years has reached a remarkable edge. The continuous research for an alternative power source due to the perceived scarcity of fuel fossils is its driving force. It has become even more popular as the cost of fossil fuel continues to rise. The earth receives in just 1 h, more energy from the sun than what we consume in the whole world for 1 year. Its application was proven to be most economical, as most systems in individual uses requires but a few kilowatt of power. This paper reviews the present day solar thermal technologies. Performance analyses of existing designs (study), mathematical simulation (design) and fabrication of innovative designs with suggested improvements (development) have been discussed in this paper.
Article Outline
1. Introduction
2. Solar water heaters
2.1. Study
2.2. Design
2.3. Development
3. Solar cookers
3.1. Study
3.2. Design
3.3. Development
4. Solar driers
4.1. Study
4.2. Development
5. Solar ponds
5.1. Study
5.2. Design
5.3. Development
6. Solar architecture
6.1. Study
6.2. Design
7. Solar air-conditioning
7.1. Study
7.2. Design
7.3. Development
8. Solar chimneys
8.1. Study
8.2. Design

9. Solar power plants
9.1. Study
9.2. Design
9.3. Development
10. Solar stills—water purification and distillation
10.1. Study
10.2. Design
10.3. Development
11. Conclusion
References



2010 Yang Peihong 杨培宏 : Wuhai (Inner Montgolia China) Solar Chimney prototype is 56m high 18m diameter

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2010 Chen Yisheng 陈义胜 : Solar hot air-flows power generation and its application in Wuhai Inner Montgolia

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2010 Breuer: Solar Chimney Power Plants – An Economist's Point of View

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2010 Chergui: Finite Element Analysis of Laminar Flow in solar chimney

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2010 dos Santos Bernardes: Solar Chimney Power Plants – Developments and Advancements (Chapter 9 from book; 16 pages)

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2010 dos Santos Bernardes: Convective heat transfer analysis of solar chimney power plant collectors (Chapter 25 from book, 14 pages)

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2010 dos Santos Bernardes: Evaluation of operational control strategies applicable to SCPP

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2010 Grena: Energy from solar balloons

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2010 Hamdan: Analysis of a solar chimney power plant in the Arabian Gulf region

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2010_He_Temperature Field Analysis Of Solar Chimney

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2010 Huang: Experimental Performance of a Solar Collector in SCPP system

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2010 Edmonds: Surface reflectance and conversion efficiency dependence of technologies for mitigating global warming

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2010 Koonsrisuk: Constructal solar chimney configuration

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2010 Koyun: Experimental Investigations on Performance and Design Parameters of SCPP (in Turkish)

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2010 Larbi: Performance analysis of a SCPP in the south-western region of Algeria

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2010 Liu: Structure Optimization and Cost Analysis of 10MW SCPP generation systems

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2010 Ming: Simple analysis on thermal performance of solar chimney power generation systems

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2010 Muller: Low pressure solar thermal converter

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2010 Ninic: Exergy and SCPP

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2010 Papageorgiou: Solar chimney technology without solar collectors

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2010 Petala: Thermodynamic Analysis of a Solar Chimney Power Plant (Chapter 11 pages 303-332) in Book: “Engineering Thermodynamics of Thermal Radiation for Solar Power Utilization”

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2010 Storm: CFD investigation of flow in and around a natural draft cooling tower, South-Africa (PhD thesis)

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2010 Zhang: Analysis of Solar Chimney and FAN

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2010 Zheng: Unsteady numerical simulation of solar chimney power plant system with energy storage layer

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2010 Zhou: Performance of SCPP in Qinghai Tibet Plateau

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2010 Zhou: Comparison of classical SCPP and combined solar chimney for power generation and seawater desalination

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Experimental Performance of a Solar Collector in Solar Chimney Power Plant System
Huilan Huang, Gang Li, Hua Zhang,
Electrical and Control Engineering, International Conference on, pp. 3718-3721,
2010 International Conference on Electrical and Control Engineering, 2010. June 25-June 27, Wuhan, China
Abstract:
Solar chimney power plant has been proposed as a device to economically generate electricity from solar energy in large scale in the future. There are many factors to influence on the performance of the solar collector. This paper describes details of the experimental process on the thermal storage material in solar collector. Two experimental modifications are tried on the thermal storage material in collector: (1) Pebbles and (2) introducing the water tubes with a black surface and combining pebbles and the water tubes. The former modification helped in enhancing the air temperature difference of the collector, while the latter contributed to increasing the air temperature as well as the collector efficiency. Changing the packing height of the pebbles out of the water tubes, the height of the pebbles has been tested and optimized. Experimental performance results of this model is presented.
Keywords:
generate electricity, thermal storage material, pebbles, solar collector.


Wind-Induced Response of the Solar Chimney
Xiao Dong Lv, Xing Fei Yuan, Lian Zhou, December 2010, Advanced Materials Research, 163-167 Advances in Structures, pp4100-4103
Abstract:
Wind-induced response was investigated on the chimney of a 100MW solar thermal power station. Firstly, dynamic characteristic of the chimney was analyzed and the first eight vibration mode shapes and frequencies were obtained. Wind velocity time-history simulation was then conducted utilizing harmonic superposition method with Fast Fourier Transformation. Followed that, transient dynamic analysis was carried out to obtain the wind-induced response and the wind vibration displacement coefficient calculated. Numerical results indicate that the maximal displacement and acceleration of the chimney appear on the top with a value of 0.5593m and 0.1933m/s2 respectively. Wind vibration displacement coefficient on the chimney increases with height with an average value of 2.303.
Keywords:
Solar Chimney, Time-History Simulation, Wind Vibration Coefficient, Wind-Induced Response


Structural System and Conceptual Model Test of Solar Chimney
Xing Qiang Zhang, Xing Fei Yuan, Li Min Li, December 2010, Advanced Materials Research, 168-170 Advances in Structures, pp1601-1610
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, application of prestress technology including adoption of prestressed concrete, introduction of circumferential prestress, arrangement of stayed cable or cable net, and utilization of tensegrity system in the solar chimney is involved, which can improve the structural behaviour of the chimney significantly. On this basis, conceptual models of three different structural systems are designed, and the performance of the models is tested under the horizontal force to show the effect of stayed cable and spokewise cable.
Keywords:
Conceptual Model, High-Rise Structure, Prestress, Solar Chimney, Structural System


Numerical analysis on the performance of solar chimney power plant system
Energy Conversion and Management, Volume 52, Issue 2, February 2011, Pages 876-883
Guoliang Xu, Tingzhen Ming, Yuan Pan, Fanlong Meng, Cheng Zhou
Abstract:
Power generating technology based on renewable energy resources will definitely become a new trend of future energy utilization. Numerical simulations on air flow, heat transfer and power output characteristics of a solar chimney power plant model with energy storage layer and turbine similar to the Spanish prototype were carried out in this paper, and mathematical model of flow and heat transfer for the solar chimney power plant system was established. The influences of solar radiation and pressure drop across the turbine on the flow and heat transfer, output power and energy loss of the solar chimney power plant system were analyzed. The numerical simulation results reveal that: when the solar radiation and the turbine efficiency are 600 W/m2 and 80%, respectively, the output power of the system can reach 120 kW. In addition, large mass flow rate of air flowing through the chimney outlet become the main cause of energy loss in the system, and the collector canopy also results in large energy loss.

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2010
太阳能热气流发电烟囱的合理形体研究
Reasonable form research of solar thermal power chimney
【作者】 吕晓东; 袁行飞;
【Author】 LV Xiao-dong, YUAN Xing-fei
(Space Structures Research Center, Zhejiang University, Hangzhou 310058, China)
【机构】 浙江大学空间结构研究中心;
【摘要】 首先总结了影响太阳能热气流发电站功率和效率的各种因素,然后运用计算流体力学方法研究了烟囱高度、烟囱直径、烟囱形状、集热棚直径和集热棚离地高度的变化对系统性能的影响.研究结果表明:增大烟囱高度或集热棚直径都会提升系统的性能;随着烟囱直径的增大,系统性能表现出先提升再下降的规律;渐扩型烟囱使系统效率最优;集热棚离地高度对系统性能影响较小.兼顾系统效率和结构安全,对一100MW电站发电烟囱的形体和几何进行了初步设计. 更多还原
【Abstract】 Various influence factors on power and efficiency of the solar thermal power station was summarized first. Taking the wind velocity and the differential pressure as evaluation index, effect of chimney’s height, chimney’s diameter, chimney’s shape, collector’s diameter and collector’s height from ground on the system efficiency was then studied by using computational fluid dynamic method. The numerical results show that increasing chimney’s height or collector’s diameter can improve the efficiency of system. With the increasing diameter of the chimney, the efficiency of system will raise first and then drop down. The chimney with asymptotic expansion form enables the optimal efficiency of the system. The collector’s height from ground has little influence on the system performance. Considering the efficiency of system and the safety of the structure, the reasonable form and geometry size was designed for the 100MW power station.
【关键词】 太阳能; 烟囱; 数值模拟; 合理形体; 系统效率;
【Key words】 solar energy; chimney; numerical simulation; reasonable from; system efficiency;
【基金】 国家自然科学基金资助项目(50708092)
【文献出处】 空间结构, Spatial Structures, 编辑部邮箱 , 2010年03期

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2010
A Method of Decreasing Power Output Fluctuation of Solar Chimney Power Generating Systems
Meng Fanlong 1, Ming Tingzhen 1, Pan Yuan 2
1 School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, China
2 College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China

Abstract: Severe fluctuation of power output is a common problem in the various generating systems of renewable energies. The hybrid energy storage system with water and soil is adopted to decrease the fluctuation of solar chimney power generating systems in the present research. The mathematical models of fluid flow, heat transfer and power output features of solar chimney power generating systems including collector, chimney and energy storage layer have been established; also the influence of the material and depth of energy storage medium upon power output has been analyzed. The simulation results demonstrate that hybrid energy storage system with water and soil can effectively decrease the power output fluctuation. When the depth of water layer is less than 0.1m, the increase of the depth would decrease the variance of day-night air temperature and velocity in the system, and the power output in daytime would largely decease and that at night largely increase. The ratio between peak and valley of power output thus would largely decrease. When the depth of the water layer is more than 0.1m, the increase of the depth would cause relatively slight power output and change range.

Keywords: Solar chimney power generating system; power output fluctuation; hybrid energy storage layer; collector; chimney

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2010 (Wuhai desert of Inner Mongolia)
太阳能热风发电站集热棚的实验和CFD计算模拟研究
Experimental and CFD computing simulation of solar thermal wind and chimney power system
【作者】 杨燕; 陈义胜; 魏毅立; 庞赟佶; 崔小超; 罗剑慧;
【Author】 YANG Yan, CHEN Yi-sheng, WEI Yi-li, PANG Yun-ji, CUI Xiao-chao, LUO Jian-hui
(Energy Sources and Environment School, Inner Mongolia University of Science and Technology, Baotou 014010, China)
【机构】 内蒙古科技大学能源与环境学院;
【摘要】 根据太阳能热风发电原理和工作特点,建立了小型太阳能热风发电集热器实验装置,研究蓄热介质沙子的储热换热能力,通过实验和计算得出:内蒙古地区沙子最高温度出现在16时,温升可达40 K;本文还拟合出一条地表太阳辐射热流曲线,用于后期太阳能热风发电系统计算和工程设计,为内蒙古乌海金沙沙漠太阳能热风发电站的建设提供理论依据. 更多还原
【Abstract】 A small-scale experimental solar collector was established to study the heat storage and heat transfer capacity according to the theory and work characteristics of solar thermal wind and chimney power system. Through experiment and calculation, the results are as follows: the maximum temperature of the sand in Inner Mongolia is at 16:00 pm and temperature rise can be up to 40 K; a fitting curve of surface solar radiation flux was obtained to calculate and design the solar thermal wind and chimney system later. The theoretical basis was provided for constructing the solar thermal wind and chimney power system in Wuhai desert of Inner Mongolia.
【关键词】 太阳能热风发电站; 集热棚; 温度;
【Key words】 solar thermal wind and chimney power system; collector; temperature;
【基金】 内蒙古科技创新引导奖励资金资助项目(20071914); 内蒙古应用技术研究与开发计划项目
【文献出处】 内蒙古科技大学学报, Journal of Inner Mongolia University of Science and Technology, 编辑部邮箱 , 2010年01期

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2010
Simple analysis on thermal performance of solar chimney power generation systems
T. Z. Ming 1, Y. Zheng 1, C. Liu 1, W. Liu 1 and Y. Pan 2
A simple analysis is made on the air flow through a solar chimney power generation system and a thermodynamic cycle of the system including the environment is established. Later, mathematical models for the ideal and actual cycle efficiencies are also established. The research results show that the ideal cycle efficiency and actual efficiency of standard Brayton cycle corresponding to medium scale solar chimney power generation system are 1,33 and 0,3% respectively, while the same parameters for large scale solar chimney power generation systems are 3,33 and 0,9% respectively. The results can give a theoretical guidance to the commercial application of solar chimney power generation systems in China.

Keywords: Solar chimney power generation system, Collector, Chimney, Brayton cycle, Thermal efficiency

Journal of the Energy Institute, 2010, 83(1), p6-11.

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2010

Unsteady numerical simulation of solar chimney power plant system with energy storage layer

Y. Zheng, T. Z. Ming, Z. Zhou, X. F. Yu, H. Y. Wang, Y. Pan and W. Liu

Numerical simulations were carried out to analyse the performance of the solar chimney power plant systems with energy storage layer in this paper. Mathematical models were developed to describe the flow and heat transfer mechanisms of the collector, chimney and the energy storage layer, and the responses of different energy storage materials to the solar radiation, and the effects of these materials on the power output with different solar radiations were analysed. Numerical simulation results show the following: first, soil and gravel both have suitable values of the property of thermal inertia, and they could be used as energy storage material for the solar chimney system; second, energy storage layer with comparatively higher heat capacity can store more energy on sunny days and can thus effectively decrease the variations of the chimney outlet parameters caused by the fluctuations in solar radiation related to the day–night cycle; third, the higher the temperature of the energy storage layer surface, the larger the energy and the exergy loss from the solar chimney systems will be.

Keywords: Solar chimney power plant, Collector, Energy storage layer, Chimney
Journal of the Energy Institute 2010 VOL 83 NO 2, 86-92

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2010
10MW太阳能热气流发电系统结构优化与成本分析
Structure Optimization and Cost Analysis of 10MW Solar Chimney Power Generation System
【作者】 刘超; 于翔飞; 孟凡龙; 明廷臻; 杨智越; 章世斌;
【Author】 LIU Chao YU Xiangfei MENG Fanlong MING Tingzhen YANG Zhiyue ZHANG Shibin
(School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)
【机构】 华中科技大学能源与动力工程学院;
【摘要】 针对太阳能热气流发电系统烟囱超高、集热棚超大的特点,基于太阳能热气流发电系统的流动与传热模型,预测了10 MW太阳能热气流发电系统的基本几何结构,建立了太阳能热气流发电系统各关键部件、整体系统的造价模型及发电成本模型。通过计算和对比10 MW系统各种几何结构型式的系统造价,获得了经济上较为合理的结构型式,并分析了影响集热棚、烟囱及系统总造价的主要因素,提出了降低系统造价的方法。结果表明,该方法经济、可行。 更多还原
【Abstract】 Aiming at the properties of high chimney and large collector for solar chimney power generation system, basic geometrical structure of 10MW solar chimney power generation system is firstly forecasted based on the flow and heat transfer model; then cost models for different key parts, the whole system, and the electric generating cost model of the solar chimney power generation system are established. The economic and reasonable structure pattern is obtained by analysis of the system cost for different kinds of geometric structure of 10 MW system. In the meanwhile, key factors affecting the cost of collector, chimney and the total cost of the system are analyzed, and the method of reducing the system cost is also put forward. Results show that the proposed method is reasonable and feasible.
【关键词】 太阳能热气流发电系统; 烟囱; 集热棚; 成本分析; 结构优化;
【Key words】 solar chimney power generation system; chimney; collector; cost analysis; structure optimization;
【基金】 教育部重点研究基金资助项目(1041127) ; 华中科技大学自主创新基金资助项目(0109120011)
【文献出处】 水电能源科学, Water Resources and Power, 编辑部邮箱 , 2010年01期


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