1.
Kaewpradap A, Sanitjai S. Energy conservation of small water to water heat pump assisted by solar collector for residential application. J. Res. Appl. Mech. Eng. [internet]. 2018 Jul. 25 [cited 2026 Apr. 22];6(1):21-8. available from: https://ph01.tci-thaijo.org/index.php/jrame/article/view/136533