In order to study the wind pressure characteristics and mutual interference of multi-row parabolic trough solar collectors, a single trough solar collector and multi-row trough solar collectors were subjected to a 1/40 scale pressure measurement test. The pitch angles, wind direction angles and its position were selected as the experimental variables. Firstly, the wind pressure distribution on the collector surface was measured; then, the contour map of wind pressure coefficient and changing curve of force coefficient were produced; at last, the influences of mutual interference of trough solar collectors on the wind load of collector surface were analyzed. The results show that the trough solar collectors at the first row in the middle column subjected to the maximum wind pressure, and its drag coefficient is twice that of a single collector. The drag coefficients are 30% to 70% that of single collector for the rest of the mirrors in the middle column. The drag coefficient for the collector at edge column of first row is 1.88 times that of single collector, and the rest of the rows are more than 1.2 times that of a single collector. Hence, it is recommended to divide the collector field into four types of areas for structural design.
Key words
solar thermal power /
parabolic trough solar collectors /
wind tunnels /
pressure distribution /
interference effects /
solar collector fields
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