Investigation of photothermal performance of compound parabolic concentrator system for soil heating in facility agriculture

Aiming at the large carbon emissions of facility agricultural heating in severe cold regions winter, a Compound Parabolic Concentrator based soil system was presented. The integrated with novel trough and used for agriculture. Following structure Concentrator, TracePro software selected to trace light Concentrator. And variation trend escape rate different incident angles analyzed. Based on calculation results, performance solar collector investigated, impact circulating air velocity photothermal explored. Research results indicate that when is 1.4 m/s average ambient temperature about 28.9 ?, outlet up 90.9?C. instantaneous heat collection, maximum conversion efficiency, unit area collection are 740.6 W, 27.83 % 0.8 MJm-2, respectively. This research can effectively promote efficient integration