Performance of a new chipper in river bed cleaning

dr. Matevž MiheličDepartment of Forestry and Renewable Resources

Introduction

• Importance of riverbed cleaning• Material that is left over• Testing of the new machine

MachineManufacturer Albach Maschinenbau

GmbH & Co. KGMachine type Silvator 2000Motor and power Mercedes OM502LA,

450kW (612HP)Weight 32000 kgLength of the machine 9,70 mWidth of the machine 3,0 mHeight of the machine 3,70 m (4,8 m)

MachineTransmision HydraulicPropulsion 4×4Tyres Nokian TRI2 650/65R42Crane Epsilon Palfinger S110FCrane reach 10,1 mChipping Drum with 12 knivesInfeed size (W×H) 1230 mm × 980 mmDrum diameter 1040 mm

LOCATIONS OF CASE STUDIES

Material

• Total study time 22,9 hours• 14,5 hours of net productive time• 31 cycles• 1093 m3 of loose chips produced

Methods• Time studies• Handheld • Laubrass UMT plus software• Cycle is the filling of a container• Volume output • Fuel consumption

Results

Results- Time consumption in min m-3

n Mean SEChipping 31 0.381 0.097

Feeding 31 0.045 0.036Positioning 31 0.051 0.045Sorting 31 0.037 0.038

ResultsChipping productivity

m3 h-1 161.2a±31.4

Net productivity based on PMH

m3 h 121.7a±30.1

Gross productivity based on SMH

m3 h 56.4a ±27.1

Fuel use L m-3 0.58a±0.17Unit cost € m-3 4.79

Conclusions

• The carrier of the machine is unique• High productivity potential• The potential is not utilized in the study– presence of contaminants– poor logistics

Thank you for your attention