Tsuneishi and Miura Develop Industry’s First External Supplemental Machine Heat Collecting Unit

Tsuneishi and Miura Develop Industry's First External Supplemental Machine Heat Collecting Unit

Tsuneishi Shipbuilding Company and Miura Co., Ltd. have co-developed the shipbuilding industry’s first external “supplemental machine heat collecting unit” (patent pending).

“Supplemental Machine Heat Collecting Unit” allows collection of exhaust heat from the generator equipped in the ship as a heat resource. The unit converts the heat to energy for the supplemental boiler and can reduce the supplemental boiler’s fuel consumption by 12-25 %.

Originally, the heat resources aboard the ship used exhaust heat from the main engine. But as efforts to reduce exhaust CO2 and NOx have lowered the temperature of exhaust from the main engine, it has become difficult to obtain the required energy. Additionally, the exhaust heat of an onboard generator inside the ship has less energy than the main engine. Therefore this couldn’t be put to effective use either.

Tsuneishi and Miura Develop Industry's First External Supplemental Machine Heat Collecting Unit

The “Supplemental machine heat collecting unit” which has now been developed can be installed to the respective generators to connect to a main engine’s supplemental boiler which used to be the exhaust machine heat collecting unit. These new supplemental machine heat collecting units can collect exhaust heat from multiple generators efficiently and complement the main engine’s utilization of exhaust heat.

Tsuneishi Shipbuilding Company has already decided to introduce this “supplemental machine heat collection unit” to some ships which will be built after 2014.

Features

  • In case it is introduced to Tsuneishi Shipbuilding Company’s ship, the amount of heat collected from generators will be about 10% of the heat collected from the main engine, and about 100kg/h of steam can be generated. Without increasing the size of the supplemental boiler, it can generate the sufficient amount of steam required to keep inside the ship.
  • With the cooperation of Daihatsu Diesel Co, Ltd. (Headquarters: Osaka City, Osaka Prefecture), a newly developed specialized silencer is also equipped to this unit, helping to decrease the noise heard in the neighborhoods when a ship enters the port.
  • Flexible layout is possible so that the maintenance space can be secured for various pipe configurations or machine structures around the generators and the supplemental boiler.
  • To prevent soot from building up in conducting tubes inside the unit, a high pressure air soot blower*2 is installed to each conducting tube.

[mappress]
Press release, July 11, 2013