Waste Not, Want Not
Waste heat recovery systems increase energy output up to 4%, reduce fuel; two orders for 14 container ships
ABB, a power and automation technology group, has won orders worth more than US$23 million to provide the waste heat recovery systems (WHRS), each powered by a power turbine generator (PTG), for 14 new 8800 TEU (twenty-foot equivalent unit) container vessels.
ABB’s scope of supply in the waste heat recovery system with a PTG consists of a PTL 3200 exhaust power turbine with control valves, alternator, reduction gear and dynamic compensator consisting of an ACS800 drive with a (step down) feed transformer and a breaking resistor bank. The package also includes two A185-L turbochargers. The electrical output of the system is 1.65 MW.
The first seven post-panamax vessels will be built at Dalian Shipbuilding Industry Co. Ltd. (DSIC); and the other seven vessels will be at New Times Shipbuilding Co. Ltd. The customers are China International Marine Containers Group Co. and Mediterranean Shipping Co. S.A (MSC).
When delivered in 2015 and 2016, the ships will serve under a long-term charter agreement to MSC, one of the world’s largest container ship owners.
ABB said the employment of a waste heat recovery system (WHRS) to increase energy output onboard ships is becoming an increasingly viable means of reducing fuel costs. In marine propulsion plants, around 50% or more of the energy from fuel is lost to heat when converted to mechanical work by the main engine. By supplementing a ship’s main propulsion plant with a WHRS, up to 4% of the lost fuel energy can be recovered and converted into electricity, the company said. More efficient energy use also reduces CO2 emissions in relation to the engine’s mechanical power output.