Infrared and Laser Engineering, Volume. 52, Issue 9, 20230259(2023)
Optical performance of linear Fresnel condenser under different aiming strategies
Figures & Tables(13)
Fig. 3. Relationship between the focal length of the mirror and the width of the spot
Fig. 7. Surface energy flow distribution diagram of collector tubes with five aiming strategies
Fig. 8. Comparison chart of optical efficiency and energy flow standard deviation for five aiming strategies
Fig. 9. Comparative diagram of local concentration ratio of five aiming strategies
Table 1. Linear Fresnel system parameter
View tableView in ArticleTable 1. Linear Fresnel system parameter
Parameter Value Width of the mirror, Wm/m 0.8 Length of the mirror, Lm/m 4 Number of mirrors, nm 16 Distance between adjacent mirrors, Sn/m 0.332 Height of receiver, H/m 9.056 Diameter of the tube/mm 90 Half acceptance angle of CPC, θc/(o) 45 Aperture width of CPC/mm 400
Table 2. Five aiming strategy
View tableView in ArticleTable 2. Five aiming strategy
Aiming strategy xaim/m M1 M2 M3 M4 M5 M6 M7 M8 1 0.00 2 0.035 3 0.07 4 −0.035 −0.025 −0.015 −0.005 0.005 0.015 0.025 0.035 5 −0.07 −0.05 −0.03 −0.01 0.01 0.03 0.05 0.07
Table 3. Collector tube temperature and preheating real-time temperature
View tableView in ArticleTable 3. Collector tube temperature and preheating real-time temperature
t/min T/℃ Constant duty cycle mode Variable duty cycle mode Strategy 1 Strategy 4 Strategy 1 Strategy 4 Note: “-” signifies that the temperature is not recorded as the evacuated tube reaches its bending limit and stops heating. “=” signifies that the evacuated tube did not reach its bending limit, but the temperature exceeded the preheating set value. As a result, the temperature is no longer recorded. The temperature represents an average of multiple evacuated tubes with an accuracy of ±1 °C. Recording began on April 15, 2023, at 10:00 A.M., with a 10-minute interval. DNI: 700-800 W/m2. 0 15 15 15 15 10 70 65 83 78 20 123 115 148 137 30 177 165 212 197 40 230 215 276 257 50 284 265 340 316 60 - 315 - = 70 - = - = 80 - = - =
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Chenglong Wang, Bolong Yan, Mao Xu, Jun Ma. Optical performance of linear Fresnel condenser under different aiming strategies[J]. Infrared and Laser Engineering, 2023, 52(9): 20230259
Paper Information
Category: Optical design
Received: Apr. 27, 2023
Accepted: --
Published Online: Oct. 23, 2023
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