Thermomagnetic generators for ultra-low-grade marine thermal energy harvesting.

ABSTRACT: Low-grade thermal gradients in marine environments represent an underexploited energy source for autonomous sensing and monitoring. Converting such small temperature differences into usable electrical power remains a key challenge for ocean-deployed systems. We present a deployable thermomagnetic generator thoroughly characterized for marine-relevant energy harvesting. The device powers an internet-connected sensor and harvests ultra-low temperature differences akin to those at the ocean surface. It draws heat from water and rejects it to ambient air, operating optimally at a temperature difference (ΔT) of ~7.5 °C. Laboratory prototypes generated up to 6.7 mW at ΔT ~ 10 °C with gentle airflow (~1 m s^-1). A separate controlled wave-tank demonstration validated stable operation an

SUBMITTER: Moreno Resendiz E 

PROVIDER: S-EPMC12661001 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature