Monthly Archives: April 2010

Wallenius’ ships will save 4-6% fuel and emissions

Car carrier Manon

The Wallenius Marine  intends to  install  a waste recovery system on one of its new or existing ships by 2011. The  initial installation which aims to utilize waste heat for production of electricity onboard is expected to achieve a fuel saving of between 4 – 6%.  It is the first time an Opcon Powerbox, an Organic Rankine Cycle (ORC) waste recovery system, will be installed on a ship .

The Opcon Powerbox is used by a heat exchanger to vaporize a working fluid with a boiling point lower than water (thereby enabling the exploitation of low grade waste heat). The gas expands over an expander, which drives a generator to produce electricity. The fluid is then cooled, and a pump increases its pressure to 30 bar, and circulates it back through the first heat exanger.

‘ We expect major environmental gains from this’ , said Per Croner, CEO of Wallenius Marine AB. ‘ Our vessels consume about 200,000- 250,000 tons of bunker fuel a year. A fuel saving of between four and six per cent means we cut emissions of carbon dioxide with about 37,000 tons a year and sulphur dioxide with some 150 tons a year.’

Wallenius will pay for the installation costs and pay for supplied electricity during the test period.  It has responsibility  for crewing, operation, technical and environmental development of the Wallenius fleet. Through subsidairies and togheter with partners, Wallenius controls more than 150 vessels.

SP River pump simple, cheap and esthetic

The technician  Vladimir Markovic has invented  a pump system which works in relatively slow and shallow moving water (rivers) to pump water for irrigation. This self-propelled pump operates with 3 pairs of propelling wings with a diameter of 2,4 meters. A triple-peristaltic submergible pump kan deliver nearly 300,000 litres of water per day.

The  Slovenian design works very simple; the moving water lifts the blade to provide push if going in the same direction, or pushes the blade down so the water flows over it if moving in the opposite direction. The pump brings air into the water to oxygenate, cleans up a river or pumps water for driving an electric generator.

The return on investment for capitalization costs is around 2,5 years and the device is estimated to last ten years. A very simple design, cheap to manufacture and esthetic, as working parts are hidden from view. Although the pump supposedly could not provide clean energy, it is a price point many times cheaper than the cheapest grid power presently available!