Productivity and economy from Liebherr

Liebherrs working at Westerlund, Antwerp: 25% reduction in fuel consumption Liebherrs working at Westerlund, Antwerp: 25% reduction in fuel consumption
Industry Database

The Danish port of Aabenraa bought a Liebherr LHM 320 in 2003. The new crane was equipped with a Peiner grab from SMAG in Germany, with a capacity of 14 cu metres for handling of gravel, sand and other materials.

The port says with its LHM 150 and a 9 cu metre grab and the new LHM 320 with its 14 cu metre grab, it loaded a 27,000 dwt vessel in 14 hours. "With the LHM 320 only, we reached an average of 1,500 tons of sand per hour!" a spokesman reports.

Liebherr says these figures show that their latest generation harbour mobile cranes are no longer just backup units for "conventional" harbour cranes mounted on rails, but are highly flexible cranes for all handling operations in a modern harbour. In 2004, Aabenraa increased the cranes' turnover by 7% over 2003.

In a different application Liebherr's electronics department has worked on new software aimed at reducing fuel consumption. The main features of the economy software are variable speeds of the diesel engine (in relation to power output requirements) being as low as possible and an automatic reduction to idle speed when no crane movement is needed. Thereby compensation of the diesel engine's speed deficiency is assured by a raised pump power in partial load mode.

The Westerlund terminal in Antwerp was chosen for three months of field tests and recorded a reduction in average consumption of 10 litres per running hour or 25%.

Purchase and maintenance manager, Michael Heijlen commented: "This software must be implemented on all cranes without delay.

Westerlund can realise a saving of approx 120,000 litres of diesel fuel per year consolidated across four cranes on the leftbank terminal."

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