Closed Solar Air Heater System Integrated with PCM (RT42 and RT50) in a Thermal Storage-Finned Heat Exchanger Unit. Tikrit j. eng. sci. [Internet]. 2023 Sep. 1 [cited 2026 Sep. 10];30(3):27-3. Available from: https://www.tj-es.com/ojs/index.php/tjes/article/view/1055