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At SMM 2014 - the international maritime trade fair due to be held next month in Hamburg, Germany - Calnetix Technologies says it will showcase a revolutionary new system developed with Mitsubishi Heavy Industries Marine Machinery and Engine Company (MHI-MME) that captures heat from marine engine jacket water and converts it to electricity for shipboard consumption.

The Hydrocurrent system is said to produce up to 125 kilowatts (kW) of power for the ship's electrical load, while still leaving sufficient heat in the jacket water for the fresh water maker.

According to Calnetix, the system pays for itself in a very short time by reducing the load on the ship's bunker-fuelled generators, resulting in fuel savings of up to 200 tonnes per year.

"It can be retrofitted easily in existing ships with a minimum of downtime," the California-based developer said.

The Hydrocurrent system uses an Organic Rankine Cycle (ORC) heat recovery process with Calnetix's patented Thermapower and Carefree Integrated Power Module technology, which converts thermal energy into mechanical power. Calnetix says its system is unique in that it can pull usable heat from a source with temperatures as low as 80 degrees Celsius (176 degrees Fahrenheit) unlike other heat recovery systems that require much higher temperatures.

Calnetix will be located in Hall B7, Stand 316, within the USA/Canada Pavilion at SMM 2014. The event is due to take place on 9-12 September 2014.