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Total cost of ownership
Less automation leads consequently to higher labor cost. With increasing labor cost
worldwide, even in former low cost countries and constantly low Si-market prices, a
production cost reduction could improve the revenues of the producers. Furthermore a
smaller product size is difficult to achieve with mechanical methods.
Figure 10:
Cost comparison of 3 different processes: Mechanical crushing (jaw crusher),
manual crushing (pneumatic hammer) and HV-crushing:
In comparison minus 28% in the total cost of ownership per kg can be calculated.
Assumptions:
Labor costs:
5 USD/hour
Silicon costs (added value):
10 USD/kg
Electric power costs:
0.06 USD/kWh
Throughput per worker @manual crushing:
88.8 tons/year
Yield loss manual crushing:
2 %
Yield loss mechanical crushing: 1.2 %
Yield loss HV pulse SELFRAG: 1 %
Production yield
2-30mm
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