A Parametric Study of Flexible Support Deflection of Photovoltaic Cells Considering Wind-Induced Load Using Time History Technique
Abstract
:1. Introduction
2. Methodology
2.1. Model Building and Meshing
2.1.1. Flexible PV Support Model
2.1.2. Mesh Division
2.2. Structural Wind Pressure Simulation
2.2.1. Wind Speed Calculation
2.2.2. Wind Pressure Calculation
2.3. Simulation
2.3.1. Mean Wind Load
Force-Bearing Safety
Fatigue Life Evaluation
Wind-Induced Response
- Panel inclination angle
- Wind direction angle
- Template gap
2.3.2. Fluctuating Wind Load
Force-Bearing Safety
Fatigue Life Evaluation
Wind-Induced Response
- Panel inclination angle
- Wind direction angle
- Template gap
3. Conclusions
- Among the three kinds of horizontal force-bearing structures, the horizontal force-bearing structure of inclined steel columns had better safety reliability, construction simplicity, and economic feasibility, and it had more advantages in practical application.
- Increasing the panel inclination angle will lead to growing structural displacements. Considering the correlation between power generation efficiency and panel inclination angle, we suggest that the panel inclination angle should be reduced reasonably in the design to reduce the harm of wind-induced responses and improve the overall power generation efficiency of the PV system.
- The structural displacements at 0° and 180° wind direction angles were significantly greater than those at 45° and 135° wind direction angles. It can be seen that the wind direction angle had a significant influence on the wind-induced response of the flexible PV support structure.
- The decrease in the template gap will lead to a reduction in structural displacement. Therefore, a reasonable increase in the template gap is conducive to reducing the influence of the flexible PV support structure on wind-induced response and further promoting the wind resistance design of the flexible PV support structure.
- It is not difficult to see from Figure 30 that although the fluctuating wind load was far less than the mean wind load in numerical terms, the structural displacement under the fluctuating wind load was significantly larger than that under the mean wind load in the analysis of various factors. Thus, the fluctuating wind load was non-negligible in the flexible PV support structure.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
Notation | Description |
The wind speed (m/s) | |
The mean wind speed (m/s) | |
The fluctuating speed (m/s) | |
The mean wind speed at a specific elevation point (m/s) | |
The mean wind speed is at a height of 10 m (m/s) | |
The height at a specific elevation point (m) | |
The power-law exponent (in this article, 0.16 was used) | |
The power spectrum of fluctuating wind (m2/s) | |
The surface roughness coefficient | |
The frequency of fluctuating wind (Hz) | |
The fluctuating wind pressure (N/m2) | |
The air density (kg/m3) |
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Flexible PV Support | Dimension/(mm) | |
---|---|---|
Horizontal force-bearing structure | Foundation | 500 mm × 500 mm × 500 mm (length × width × height) |
Column | 200 mm × 200 mm × 2400 mm (length × width × height) | |
Beam | 2400 mm × 200 mm × 200 mm (length × width × height) | |
Thick tripod | 1420 mm × 200 mm × 820 mm (length × width × height) | |
1160 mm × 200 mm × 1160 mm (length × width × height) | ||
820 mm × 200 mm × 1420 mm (length × width × height) | ||
Thin tripod | 1430 mm × 1155 mm × 1078 mm × 20 mm (L × M × N × diameter) | |
1600 mm × 1400 mm × 908 mm × 20 mm (L × M × N × diameter) | ||
1623 mm × 1400 mm × 682 mm × 20 mm (L × M × N × diameter) | ||
Template gap | 10 mm | |
50 mm | ||
100 mm | ||
Cable | 15600 mm × 20 mm (span × diameter) | |
PV panel | 1640 mm × 1000 mm × 48 mm (length × width × height) |
Material | Density (kg/m3) | Young’s Modulus (Pa) | Poisson’s Ratio |
---|---|---|---|
Concrete | 2300 | 3 × 1010 | 0.18 |
Structural steel | 7850 | 2 × 1011 | 0.3 |
Aluminium alloy | 2770 | 7.1 × 1010 | 0.33 |
PV material | 2600 | 1.1 × 1011 | 0.225 |
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Chi, Y.; Nan, B.; Qiao, Y.; Leng, J. A Parametric Study of Flexible Support Deflection of Photovoltaic Cells Considering Wind-Induced Load Using Time History Technique. Buildings 2024, 14, 2706. https://doi.org/10.3390/buildings14092706
Chi Y, Nan B, Qiao Y, Leng J. A Parametric Study of Flexible Support Deflection of Photovoltaic Cells Considering Wind-Induced Load Using Time History Technique. Buildings. 2024; 14(9):2706. https://doi.org/10.3390/buildings14092706
Chicago/Turabian StyleChi, Yuanpeng, Bo Nan, Youxin Qiao, and Junjie Leng. 2024. "A Parametric Study of Flexible Support Deflection of Photovoltaic Cells Considering Wind-Induced Load Using Time History Technique" Buildings 14, no. 9: 2706. https://doi.org/10.3390/buildings14092706