P72 A 5 MW steam power plant has an efficiency of 30 and use

P7-2) A 5 MW steam power plant has an efficiency of 30% and uses coal as fuel. Plant

poperates 8400 hours/year. Coal costs 30$/ton and its heating value is 15 000

kJ/kg. Plant costs 7.5 million $. The interest rate is 8% per annum, life of the

investment is 25 years. Find the unit cost of electricity in $/kWh.

Heating value of coal = 15000 KJ/Kg.

Efficiency of power plant = 30%

Heat Rate- It is the heat input required to produce one unit of electricity (1KWhr)

Coal quantity

Coal cost