Giriulla mill
Overall power costs of the system can be calculated on the following assumptions:
System cost US$ 32000 (Hfl. 90000)
System life-time 6 yrs
Interest rate 10%
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Maintenance costs 10 percent per year of initial investment V Additional labour costs 1 man-yr Coconut shell costs US$ 6.00/t
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Those assumptions lead to the following breakdown of annual costs:
Energy produced (4000 h x 20 kW) 80000 kWh
0.171 US$/kWh
Those costs compare favourably with a diesel generation system, for which the costs under comparable circumstances would be around 0.26 US$/kWh.
1/ Assumed
2/ Annual capital charges are calculated using the relationship:
ACC = C x— — —
l-(l+i)
in which:
C = capital costs і = annual interest rate t = lifetime of system