Economic evaluation
The initial investment, shown in Table 4.3, was 6 2131700 equivalent to US$ 16918 or 423 US$/kW. Note that the engine and generator were used and renovated.
An extension of the power line of 150 m to family homes is also included.
3.3.2 Operation and maintenance costs
The person responsible for operation and maintenance of the gas producer equipment receives a monthly salary of 6 70000. His basic pay is 6 60000 and he receives an additional 6 10000 to watch and stop the machine at night while electricity is supplied to family homes until 22.00 hours. Taking 25 work-days a month as the base, the daily wage is 6 2800.
Net operating and — maintenance time on the gas producer and electric generator engine group corresponds to a half day’s work of the operator, the other half being spent on maintenance tasks elsewhere in the mill. Therefore, only 50% of the mechanic’s salary, or 6 1400 per day, is allocated to the gas producer and electric generator group.
Cost of lubricants is about 6 0.84/kWh or 0.0067 US$/kWh.
Spare parts for the engine and gasifier system have an average cost of 6 174424 annually or 13 percent of the basic investment cost of the equipment (6 1352100).
Note = 1 US$ = 126 6(1982)
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Table 4.3 Capital Investment for the electricity generation unit at the Sapire mill
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