"The device costs less than conventional designs, has fewer moving parts, and is made of durable materials. The "design could be used in fleets of low-cost, easily maintained structures at sea within decades, to take advantage of powerful waves".
no boiling required just something beyond absolute zero, of course, higher temperature means more heat content so more collision per second, and more wattage. a steaming cup of coffee could be used to provide a small electrical current, even room temperature water as well
"The device costs less than conventional designs, has fewer moving parts, and is made of durable materials. The "design could be used in fleets of low-cost, easily maintained structures at sea within decades, to take advantage of powerful waves".