Wind pressure distribution on trough concentrator and fluctuating wind pressure characteristics

Solar Energy ◽  
2015 ◽  
Vol 120 ◽  
pp. 464-478 ◽  
Author(s):  
Qiong Zou ◽  
Zhengnong Li ◽  
Honghua Wu ◽  
Rao Kuang ◽  
Yi Hui
Keyword(s):  
Pressure Distribution ◽  
Wind Pressure ◽  
Fluctuating Wind ◽  
Pressure Characteristics

A Study on the Non-Gaussian Property by the Method of Limiting Streamline

2014 ◽  
Vol 919-921 ◽  
pp. 1390-1395
Author(s):  
Xu Feng Sun
Keyword(s):  
Pressure Distribution ◽  
Statistical Method ◽  
Flow Separation ◽  
Wind Pressure ◽  
Wind Action ◽  
Close Relationship ◽  
Non Gaussian ◽  
Limiting Streamlines ◽  
Fluctuating Wind

Under wind action, the property of non-Gaussian wind pressure distribution is very important for determination of peak factor, simulation of fluctuating wind pressure and design of cladding and components. Since the distribution of non-Gaussian zone is highly irregular based on the statistical method, any effort on giving regular non-Gaussian zone regions cant reflect the real non-Gaussian property. Considering the fact that non-Gaussian property was induced by flow separation and generally the movement of vortex showed the character of time averaged steady, taking a typical low-rise building as the example, the distribution of limiting streamlines and the theory of flow separation was applied in the research. Results show that the distribution of limiting streamlines has a close relationship with the intensity of non-Gaussian property and can be used as an intuitionistic tool in the research of identification and mechanism for non-Gaussian properties.

Fluctuating wind pressure characteristics of heliostats

2013 ◽  
Vol 50 ◽  
pp. 307-316 ◽  
Author(s):  
Bo Gong ◽  
Zhifeng Wang ◽  
Zhengnong Li ◽  
Chuncheng Zang ◽  
Zhiyong Wu
Keyword(s):  
Wind Pressure ◽  
Fluctuating Wind ◽  
Pressure Characteristics

Wind Pressure and Wind-Induced Vibration of Heliostat

2008 ◽  
Vol 400-402 ◽  
pp. 935-940 ◽  
Author(s):  
Ying Ge Wang ◽  
Zheng Nong Li ◽  
Bo Gong ◽  
Qiu Sheng Li
Keyword(s):  
Dynamic Response ◽  
Wind Direction ◽  
Wind Load ◽  
Wind Pressure ◽  
Induced Response ◽  
Vertical Angle ◽  
Lateral Direction ◽  
Direction Angle ◽  
Wind Pressures ◽  
Fluctuating Wind

Heliostat is the key part of Solar Tower power station, which requires extremely high accuracy in use. But it’s sensitive to gust because of its light structure, so effect of wind load should be taken into account in design. Since structure of heliostat is unusual and different from common ones, experimental investigation on rigid heliostat model using technology of surface pressure mensuration to test 3-dimensional wind loads in wind tunnel was conducted. The paper illustrates distribution and characteristics of reflector’s mean and fluctuating wind pressure while wind direction angle varied from 0° to 180° and vertical angle varied from 0° to 90°. Moreover, a finite element model was constructed to perform calculation on wind-induced dynamic response. The results show that the wind load power spectral change rulers are influenced by longitudinal wind turbulence and vortex and are related with Strouhal number; the fluctuating wind pressures between face and back mainly appear positive correlation, and the correlation coefficients at longitudinal wind direction are smaller than those at lateral direction; the fluctuating wind pressures preferably agree with Gaussian distribution at smaller vertical angle and wind direction angle. The wind-induced response and its spectrums reveal that: when vertical angle is small, the background responsive values of reflector’s different parts are approximately similar; in addition, multi-phased resonant response occurring at the bottom. With the increase of , airflow separates at the near side and reunites at the other, as produces vortex which enhances dynamic response at the upper part.

Wind Pressure Distribution on Multi-span Semi-circular Canopy Roofs

2021 ◽  
pp. 831-840
Author(s):  
Neelam Rani ◽  
Ajay Pratap ◽  
Ashok K. Ahuja
Keyword(s):  
Pressure Distribution ◽  
Wind Pressure

scholarly journals Feasibility Study of Fluctuating Wind Pressure around High-Rise Buildings as a Potential Energy-Harvesting Source

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4032 ◽  
Author(s):  
Park ◽  
Kim ◽  
Jung
Keyword(s):  
Energy Source ◽  
Energy Harvesting ◽  
Wind Turbine ◽  
Wind Pressure ◽  
Experimental Conditions ◽  
Energy Harvesters ◽  
High Rise ◽  
New Locations ◽  
Noise Vibration ◽  
Fluctuating Wind

As the importance of sustainable energy increases, wind power generation systems utilizing wind energy around high-rise buildings are being developed. However, in existing wind turbine systems, it is necessary to solve noise, vibration problems, and structural issues for the installation of large-sized systems. In addition, small wind turbine systems can be installed only in limited areas such as roofs and corners, because their efficiency is limited to high and stable wind speed. For this reason, the distribution of fluctuating wind pressure around high-rise buildings was analyzed, and its feasibility as an energy source was evaluated, reflecting that fluctuating wind pressure can be used in vibration-based energy-harvesters. To achieve this, firstly, experimental conditions and theories were established to check the characteristic of wind pressure around high-rise buildings. The experiment was divided into the environment without surrounding buildings and the urban environment. Next, the pressure distribution around high-rise buildings and the quantitative results obtained from the experiment were determined. Finally, based on the results obtained from the experiments, the feasibility of fluctuating wind pressure as an energy-harvesting source was analyzed. From this study, it was found that fluctuating wind pressure can be used as a new energy source at new locations of high-rise buildings that were not utilized previously.

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