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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

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

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

Wind tunnel test results for a 2/4.5 scale MEXICO rotor

Cho, Taehwan; Kim, Cheolwan - In: Renewable Energy 42 (2012) C, pp. 152-156

This paper presents the wind tunnel test results from MEXNEXT, an IEA wind task for analyzing the measurements which have been taken in the EU project ‘MEXICO’. A 2/4.5 scaled model of ‘MEXICO’ rotor was tested in the KARI low wind tunnel with 5 × 3.75 m2 open jet test section. The...

Persistent link: https://www.econbiz.de/10011044194

Simulation of GEMASOLAR-based solar tower plants for the Chinese energy market: Influence of plant downsizing and location change

Amadei, C.A.; Allesina, G.; Tartarini, P.; Yuting, Wu - In: Renewable Energy 55 (2013) C, pp. 366-373

In many countries that are experiencing a steep increase of energy demand, there is a growing challenge of responding to this demand by investing in renewable technologies for new power plants. Solar energy seems to be one of the best solutions to reduce the fossil fuels consumption for energy...

Persistent link: https://www.econbiz.de/10011044536

Fluctuating wind pressure characteristics of heliostats

Gong, Bo; Wang, Zhifeng; Li, Zhengnong; Zang, Chuncheng; … - In: Renewable Energy 50 (2013) C, pp. 307-316

The focus of the current study is the wind loads on a 10.5 m × 9.0 m heliostat with a column height of 6.4 m, located … in Beijing, PR China. This paper presents selected results of wind tunnel measurements of wind pressures on the heliostat …

Persistent link: https://www.econbiz.de/10011045258