An integrated system of sinusoidal-corrugated plate heat exchanger and thermoelectric modules for wastewater heat recovery

•An integrated system of sinusoidal-corrugated heat exchanger and thermoelectric modules is designed and investigated for industrial wastewater heat recovery.•The sinusoidal-corrugated heat exchanger prototype is fabricated by laser powder bed fusion technology.•The sinusoidal-corrugated heat exchanger has a maximum heat transfer effectiveness of 70.94%.•The maximum net output power of system with sinusoidal-corrugated heat exchanger can reach 0.5 W.