PERFORMANCE ANALYSIS OF HEAT EXCHANGER BY REPLACING COPPER TUBES WITH POLYMER TUBE OR COMPOSITES MATERIAL. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 2, n. 5, p. 441–446, 2015. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/884. Acesso em: 8 sep. 2025.