Fig. 1. Overheating phenomenon at the top of S-CPC. (a) Concentrated radiation at the top of the absorber; (b) bubbles gather at the top of the absorber

Fig. 2. Schematic diagram of A-CPC model and arc absorber

Fig. 3. A-CPC geometric model. (a) AB curve; (b) BC curve

Fig. 4. CT curve of A-CPC

Fig. 5. Comparison of A-CPC and S-CPC receivable angle

Fig. 6. Concentration experiment. (a) Experimental platform; (b) laser experiment

Fig. 7. Error analysis of experimental and theoretical values. (a) Incident angle is 30°; (b) incident angle is 38°

Fig. 8. Optical efficiency

Fig. 9. Comparison of effective working time for collecting beam radiation

Fig. 10. Energy flow density distribution on the absorber. (a) Incident angle is 0°; (b) incident angle is 30°

Fig. 11. CPC solar radiation collection calculation procedure

Fig. 12. Comparison of radiation amount