MHI completes first unit waste energy recovery power generation system

Incorporating the company’s proprietary controlling system, which enables optimized power generation by both exhaust-gas power and steam turbines, the STG System reduces the fuel cost of vessels by 10% by effectively recovering exhaust gas energy. The STG system is the most recent type of the company’s MERS (Mitsubishi Energy Recovery System) that utilizes waste energy from marine diesels for power generation.

The first STG system will be installed in a container vessel currently being built by Daewoo Shipbuilding & Marine Engineering of Korea, and will be delivered to A.P. Møller – Mærsk in 2011. Celebrating the completion of the first unit, a ceremony was held recently at the Nagasaki Shipyard & Machinery Works of MHI.

MHI has already received orders for 38 units of the STG system and at present is also receiving many business inquiries for the same. Many of these orders and inquiries are for use on container vessels which carry numerous energy-consuming reefer container units. With the successful completion of the first unit, MHI plans to reinforce its marketing activities targeting newly-built vessels.

The STG system comprises an exhaust gas power turbine, an economizer (exhaust gas boiler), a steam turbine, a generator, a reduction gear box and an SSS (synchronous self-shifting) clutch and control system. MHI leverages its technological expertise as a major shipbuilding company handling essential components for marine-use waste energy recovery systems such as diesel engines, turbochargers, steam turbines and boilers for the new, energy-saving STG system.