To calculate the annual bill and flat rate per unit for the industrial consumer, we need to consider the maximum demand, power factor, load factor, and the tariff structure.
Given data:
Maximum demand (MD) = 1 MW
Power factor (PF) = 0.8 lagging
Annual load factor (LF) = 65%
Tariff: OMR 0.7 per KVA of maximum demand + 18 baisa per unit consumed
First, let's calculate the following values:
(i) Maximum demand in KVA:
Maximum demand in KVA = MD / PF
Maximum demand in KVA = 1 MW / 0.8
Maximum demand in KVA = 1.25 MVA
(ii) Annual energy consumption:
Annual energy consumption = Maximum demand (KVA) * Annual load factor
Annual energy consumption = 1.25 MVA * 0.65
Annual energy consumption = 0.8125 MVA
(iii) Annual bill calculation:
Annual bill = (Maximum demand in KVA * Tariff rate per KVA) + (Annual energy consumption * Tariff rate per unit)
Annual bill = (1.25 MVA * OMR 0.7/KVA) + (0.8125 MVA * OMR 0.18/unit)
Annual bill = OMR 0.875 + OMR 0.146625
Annual bill = OMR 1.021625
(iv) Flat rate per unit:
Flat rate per unit = Annual bill / Annual energy consumption
Flat rate per unit = OMR 1.021625 / 0.8125 MVA
Flat rate per unit ≈ OMR 1.2578
Therefore, the calculations for the industrial consumer are as follows:
(i) Annual bill: OMR 1.021625
(ii) Flat rate per unit: Approximately OMR 1.2578