Improving the cost-efficiency of terminal wood supply (results from BEST programme)

Transcription

1 VTT TECHNICAL RESEARCH CENTRE OF FINLAND LTD Improving the cost-efficiency of terminal wood supply (results from BEST programme) Terminals in Swe & Fin workshop Matti Virkkunen and Jyrki Raitila SLU, Umeå, November 4, 2016

2 VTT Ltd State owned limited liability company 2470 employees (2015) 80 % with a university degree 11/11/2016 2

3 Background terminal costs Terminal size, working method and fuel material matters There is no general cost for terminal operations has to be determined individually for each case 11/11/2016 3

4 Background: Terminal cost breakdown Majority of the costs are derived from terminal operations Cost of comminution dominates main emphasis should be given to cost reduction in this work phase 11/11/2016 4

5 Background: possibilities for cost reduction Electrical stationery machines Diesel engines ineffective High utilization rate large volumes More efficient space utilization More output from a smaller storage area Shorter transport distances within the terminal More efficient working methods Unnecessary steps avoided Hot chain with a risk for waiting times avoided Automation where possible 11/11/2016 5

6 Terminal time studies and energy consumption measurement 6

7 Terminal demonstration and measurements Worktime distribution was determined for all loads time study Energy consumption was measured from all comminuted loads (CAN port + electrical energy) Worktime utilization cancellations, waiting Energy consumption additional costs for energy use Chipper (Heinola BMH feeding system, electrical, stationary) Grinder (Vermeer, electrical, stationary) Material handler Terex Fuchs MHL 360 (diesel) (CAN port measurement) Mercedes Axor timber truck (crane Epsylon M 260 L) 11/11/2016 7

8 Work time distribution (at chipper, delimbed stem and whole tree) Smooth operation, no surprises 11/11/2016 8

9 Work time distribution (at grinder, logging residue) Share of discharge and waiting times higher compered to chipper study 11/11/2016 9

10 Energy consumption and example of the collected data Example of the aggregated data feed & comminution + energy & workphase 11/11/

11 Energy consumption + chipper + feeding (delimbed stem and whole tree) Energy consumption for feeding very high vs. comminution exceeds comminution with some loads! Energy content based energy consumption of comminution varies according to the MC of the material savings On average the energy consumption roughly one third of mobile diesel chippers 11/11/

12 Energy consumption + grinder + feeding (logging residue) Energy consumption in grinding roughly two times the consumption with chipping Energy content based energy consumption of comminution varies according to the MC of the material 11/11/

13 Loading of a truck/unloading of a truck with delimbed stem studies with 4 & 6 m piles No significant differences loading from 6m even more productive 4 meters height a standard - 6m pile height already applied in Rovaniemi 11/11/

14 Terminal supply chains and direct supply chains 14

15 Roadside chipping and terminal chipping of delimbed stem, feed in terminal Mobile machines in terminal chipping quite far from optimal, although a very common solution today! 11/11/

16 Conclusions From the cost persperctive there are too many energy wood terminals Bigger terminals would facilitate using more cost efficient machinery Not all energy wood types are not optimal for a terminal Dense feedstock with good handling & storage properties optimal for terminals The comminution cost with a electrical stationery machines about one third of the cost with mobile diesel machines Potential cost saving up to 18% of material cost at plant from this alone Material handler operations need optimization (automation) 6 metres high piles effective both handling and space utilization Loose and heterogenous materials should be comminuted at origin point with as little handling as possible (fast track -system) 11/11/

17 TECHNOLOGY FOR BUSINESS