Mean Wind Loading on Parabolic-Trough Solar Collectors

1981 ◽  
Vol 103 (4) ◽  
pp. 313-322 ◽  
Author(s):  
D. E. Randall ◽  
D. D. McBride ◽  
R. E. Tate
Keyword(s):  
Boundary Layer ◽  
Wind Tunnel ◽  
Solar Collector ◽  
Wind Loading ◽  
Design Parameters ◽  
Pitching Moment ◽  
Parabolic Trough ◽  
Wind Force ◽  
Layer Flow ◽  
Parabolic Trough Solar Collector

Two wind-tunnel force and moment tests have been conducted on parabolic-trough solar collector configurations. The two tests were conducted in different flow field environments, one a uniform flow infinite airstream, the second a simulated atmospheric boundary layer flow with the models simulating a ground-mounted installation. The force and moment characteristics of both isolated single-module troughs and of trough modules within array configurations have been defined over both operational and stow attitudes. The influence of various geometric design parameters for collector modules and arrays has been established. Data indicate that forces and in general the pitching moment increase with mounting height and with trough aspect ratio. Collector modules interior to large arrays experience wind force reductions as high as 50–65 percent, while appropriate fences or berms surrounding the arrays can provide exterior modules with protection of this order.

scholarly journals Experimental Results of Pitching Moment Tests on Parabolic-Trough Solar-Collector Array Configurations

1984 ◽  
Vol 106 (2) ◽  
pp. 223-230
Author(s):  
D. E. Randall ◽  
R. E. Tate ◽  
D. A. Powers
Keyword(s):  
Wind Tunnel ◽  
Solar Collector ◽  
Experimental Results ◽  
Pitching Moment ◽  
Test Results ◽  
Parabolic Trough ◽  
Wind Tunnel Tests ◽  
Array Configuration ◽  
Parabolic Trough Solar Collector ◽  
Shielding Effects

Two wind-tunnel tests were conducted to investigate specifically the pitching moment characteristics of parabolic-trough solar-collector modules deployed within a collector array. The collector modules were located within various rows of a simulated array configuration to investigate shielding effects from upstream collector rows and/or windscreen fences. Selected fence configurations and fence spacing upstream from the initial array row were studied. The test results demonstrate that pitching moment is significantly reduced by shielding provided by upstream fencing or collector rows.

Field measurements of boundary layer wind characteristics and wind loads of a parabolic trough solar collector

Solar Energy ◽  
2012 ◽  
Vol 86 (6) ◽  
pp. 1880-1898 ◽  
Author(s):  
Bo Gong ◽  
Zhifeng Wang ◽  
Zhengnong Li ◽  
Jianhan Zhang ◽  
Xiangdong Fu
Keyword(s):  
Boundary Layer ◽  
Solar Collector ◽  
Field Measurements ◽  
Wind Loads ◽  
Parabolic Trough ◽  
Wind Characteristics ◽  
Parabolic Trough Solar Collector

Exergy Optimization of a Novel Combination of a Liquid Air Energy Storage System and a Parabolic Trough Solar Collector Power Plant

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Shahram Derakhshan ◽  
Mohammadreza Khosravian
Keyword(s):  
Energy Storage ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Solar Collector ◽  
Design Parameters ◽  
Parabolic Trough ◽  
Flow Rates ◽  
Mass Flow Rates ◽  
Parabolic Trough Solar Collector

In this paper, a parabolic trough solar collector (PTSC) plant is combined with a liquid air energy storage (LAES) system. The genetic algorithm (GA) is used to optimize the proposed system for different air storage mass flow rates. The roundtrip exergy ratio is considered as the objective function and pressures of six points and mass flow rates of five points are considered as design parameters. The effects of some environmental and key parameters such as different radiation intensities, ambient temperatures, output pressures of the second compressor, and mass flow rates of the collectors fluid on the exergy ratio are investigated. The results revealed that the system could produce 17526.15 kJ/s (17.5 MW) power in high demands time and 2233.48 kJ/s (2.2 MW) power in low demands time and the system shows that a value of 15.13% round trip exergy ratio is achievable. Furthermore, the exergy ratio decreased by 5.1% when the air storage mass flow rate increased from 10 to 15 kg/s. Furthermore, the exergy ratio decreases by increasing the collectors inside fluid mass flow rate or by decreasing radiation intensity.

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