A Comparative Study of the Productivity and Efficiency of Thermo-Solar Collector Models in Different Climatological Conditions in Some Regions in Yemen. TU J. Nat. Appl. Sci. [Internet]. 2023 Jan. 27 [cited 2026 Apr. 24];2(1):1-11. Available from: https://journal.tu.edu.ye/index.php/TUJNAS/article/view/1276