Toolthaisong, Sarthit, Bundit Kritacom, and Sunchai Rampoepadongg. “The effect of the diameter ratios on the effectiveness of the concentric tube heat exchanger”. Engineering and Applied Science Research 38, no. 2 (May 22, 2012): 139–146. accessed August 31, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/1605.