Salman B, Sanaa Hassan Obaid. Enhanced Performance of Flat Plate Solar Collector with Twisted Tape Double Cutting Rectangle Shape. J. eng. sustain. dev. [Internet]. 2025 Jan. 1 [cited 2026 Aug. 25];29(1):68-7. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/3128