Power station 18
Question = A 100 MW power station delivers 100 MW for 2 hours , 50 MW for 8 hours and is shut down for the rest of each day . It is also shut down for maintenance for 60 days each year . Calculate it's annual load factor .?
Solution = is given ,
» 1 st load = 100 MW × 2 hours = 200 MW ,
» 2 nd load = 50 MW × 8 hours = 400 MW ,
» station operate days = 365 - 60 = 305 days ,in a year ,
• annual load factor ( a.l.f. ) =( MWH supplied per annum ) ÷ ( maximum demand in MW × working hours ) ,
» ( Watt × hours ) = kWh or MWH ,
» MWH supplied per annum = ( 100 × 2 ) + ( 50 × 8 ) , = 200 + 400 = 600 MWH ,
» energy supply on station operate days = 600 MWH × 305 days = 1,83,000 MWH ,
» So , a.l.f. = ( 1,83,000 MWH ) ÷ ( 100 MWH ) × ( 305 days × 24 hour ) ,
» 0.25 , » for % = × 100 , = 0.25 × 100 , = 25 % , answer ✓
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