9 c]A consumer has a maximum demand of 200 kW at 40% load factor. If the tariff is Rs. 100 per kW of maximum demand plus 10aise per kWh Find the overall cost per kWh.
solution :
Note: Load factor = (Average load) / (maximum demand)
Average load = (Total unit energy consumed) / (Total time)
Overall cost per unit (kWh) generate = (Total charges) / (Total unit energy consumed)
Maximum demand = 200kW
Load factor = 40%
Tariff rate = Rs. 100 per KW of maximum demand+10 paise per kWh
Energy consumed per annum (kWh) = (100×0.4×8760) [365days x 24 hours = 8760]
= 350.4 x 103kWh
Annual fixed charge = Rs. 100 per kW of maximum demand
Annual fixed charge = 200 x100 = 20,000
Running charge = 10 paise per kWh
Running charge = 0.1 x 350.4 x 103 = Rs. 35040 rs
Total charge or tariff = Rs. 20,000+ Rs. 35040 = Rs. 55040 rs