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An experimental and numerical study of the gap effect on wind load on heliostat

Wu, Zhiyong; Gong, Bo; Wang, Zhifeng; Li, Zhengnong; … - In: Renewable Energy 35 (2010) 4, pp. 797-806

coal power plant. Heliostat arrays cause about 40% of the costs of central receiver power plants. The cost reduction of … static pressure on the leeward surface of the facets. Consequently it increases the total drag force on the heliostat …. However, the absolute increment of the wind load is very small compared with the overall wind load on the heliostat structure …

Persistent link: https://www.econbiz.de/10010805141

On the effects of windbreaks on the aerodynamic loads over parabolic solar troughs

Torres García, E.; Ogueta-Gutiérrez, M.; Ávila, S.; … - In: Applied Energy 115 (2014) C, pp. 293-300

Parabolic reflectors, also known as parabolic troughs, are widely used in solar thermal power plants. This kind of power plants is usually located on desert climates, where the combined action of wind and dust can be of paramount importance. In some cases it becomes necessary to protect these...

Persistent link: https://www.econbiz.de/10011040790

Computational and experimental investigations of an omni-flow wind turbine

Ying, P.; Chen, Y.K.; Xu, Y.G.; Tian, Y. - In: Applied Energy 146 (2015) C, pp. 74-83

Both numerical and experimental studies were conducted to evaluate the performance of an omni-flow wind turbine designed to provide renewable electricity on the top of urban buildings like skyscrapers. The numerical approach was based on Finite Volume Method (FVM) and the turbulence flow was...

Persistent link: https://www.econbiz.de/10011263375

A hybrid actuator disc – Full rotor CFD methodology for modelling the effects of wind turbine wake interactions on performance

Sturge, D.; Sobotta, D.; Howell, R.; While, A.; Lou, J. - In: Renewable Energy 80 (2015) C, pp. 525-537

The performance of individual wind turbines is crucial for maximum energy yield, however, their performance is often reduced when turbines are placed together in an array. The wake produced by the rotors interacts with downstream turbines, resulting in a reduction in power output. In this paper,...

Persistent link: https://www.econbiz.de/10011263758

A full-scale prediction method for wind turbine rotor noise by using wind tunnel test data

Ryi, Jaeha; Choi, Jong-Soo; Lee, Seunghoon; Lee, Soogab - In: Renewable Energy 65 (2014) C, pp. 257-264

The development of a low-noise wind turbine rotor and propeller is often cost-effective and is in fact a race against time to those who wish to build and test a small-scale rotor instead of an expensive full-scale rotor. The issue of this approach has to do with the interpretation of wind tunnel...

Persistent link: https://www.econbiz.de/10010805579

An experimental study of the two-staged wind turbines

Ushiyama, Izumi; Shimota, Toshihiko; Miura, Yukihiro - In: Renewable Energy 9 (1996) 1, pp. 909-912

In order to improve the torque performance of the propeller type wind turbine, and to increase the relative rotational speed of the generator, two-staged wind turbines were proposed. The experimental results of a wind tunnel test showed that self-starting characteristics of two-staged co-axial...

Persistent link: https://www.econbiz.de/10010805807

A new concept for integrating a thermal air power tube with solar energy and alternative, waste heat energy sources and large natural or man-made, geo-physical phenomenon

Di Bella, Francis A.; Gwiazda, Jonathan - In: Renewable Energy 30 (2005) 2, pp. 131-143

pit is described. Solar energy is concentrated by a plurality of heliostat mirrors placed along the embankment of the pit …

Persistent link: https://www.econbiz.de/10010806814

A review of wind loads on heliostats and trough collectors

Sun, Honghang; Gong, Bo; Yao, Qiang - In: Renewable and Sustainable Energy Reviews 32 (2014) C, pp. 206-221

This article reviews existing papers and presents considerations about wind loads on heliostats and trough collectors. Research efforts all over the world have focused, for decades, on the evaluation and reduction of wind loads on heliostats and trough collectors. However, the subject continues...

Persistent link: https://www.econbiz.de/10010753399

Ray tracing and simulation for the beam-down solar concentrator

Wei, Xiudong; Lu, Zhenwu; Yu, Weixing; Xu, Wenbin - In: Renewable Energy 50 (2013) C, pp. 161-167

The ray tracing equations for the beam-down solar concentrator have been derived in this paper. Based on the equations, a new module for the simulation of the beam-down solar concentrating system has been developed and incorporated into the code HFLD. To validate the ray tracing equations, a...

Persistent link: https://www.econbiz.de/10010803839

Modeling and simulation of the pioneer 1MW solar thermal central receiver system in China

Yao, Zhihao; Wang, Zhifeng; Lu, Zhenwu; Wei, Xiudong - In: Renewable Energy 34 (2009) 11, pp. 2437-2446

CRS in China. A software tool HFLD is developed for heliostat field layout design and performance calculation. The … simulation results from HFLD approximately agree very well with the published heliostat field efficiency data from Spain PS10 …. Based on that, the heliostat field layout of DAHAN is designed using HFLD and the whole CRS performance is simulated in the …

Persistent link: https://www.econbiz.de/10010805158