Power station 20

 Question = A generating station supplies the following loads : 15000 kW , 12000 kW , 8500 kW , 6000 kW ,and 450 kW . The station has a maximum demand of 22000 kW . The annual load factor of the station is 48 % . Calculate (1) the number of units supplied annually (2) the diversity factor and , (3) the demand factor . 

Solution = is given , 

» according to question total load = 15000 + 12000 + 8500 + 6000 + 450 kW = 41951.90 kW , 

» maximum demand = 22,000 kW ,

» annual load factor = 48% , 

(1) the number of units supplied annually = M.D. × L.F. × Hours in a years , 

» units = 22,000 × 0.48 × 8760 = 92505600 kWh , or , 925 × 10⁵ kWh , answer ✓ 

(2) Diversity factor = total following loads ÷ maximum demand , 

» ( 15000 + 12000 + 8500 + 6000 + 450 ) ÷ ( 22,000 )  = 41951.90 kW ÷ 22,000 = 1.9 answer ✓ 

(3) Demand factor = maximum demand ÷ the following loads = 22, 000 kW ÷ 41951.90 kW ,= 0.5244 , = for % ( × 100 )= 52.44 % answer ✓ 

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