Corrosive waste-heat recovery systems suffer material degradation, performance loss and high maintenance when conventional metallic heat exchangers face chloride-, carbonate- and sulfur-bearing condensates. This study presents a multiphysics CFD-electrochemical assessment of silicon carbide (SiC) for heat exchangers, via a 3D shell-and-tube model in COMSOL Multiphysics coupling turbulent flow, conjugate heat transfer, species transport and electrochemical corrosion. The thermal model considered high-pressure ammonia (tube side) and pressurized water (shell side); the corrosion model represented a flue-gas condensate/electrolyte containing Cl\(^-\), NH\(_4^+\), HCO\(_3^-\), CO\(_3^{2-}\), HSO... More >