Question 9.12: Using utility structure C of Table 9.9, calculate the utilit......
Using utility structure C of Table 9.9, calculate the utility bill for a residence during a summer month when the energy use is 2000 \ kWh with 55% of the energy consumption occurring during the on-peak period.
With all the charges considered by utility rate C (see Table 9.9), the electric energy bill for the winter month can be calculated as follows:
(a) Customer charge=\$9.85
(b) Energy charge=2000 \ kW*[0.55*\$0.1500/kWh+0.45*\$0.0335/kWh]=\$195.15
(c) Taxes= 3\%[(a)+(b)]=\$6.15
Total monthly charges =(a)+(b)+(c)=\$211.15
The average cost of electricity for the month is then \$211.15/2000 \ kWh or \$0.1056/kWh.
TABLE 9.9
An Electric Time-of-Use Rate for Residential Service (Utility Rate C)
| Billing Item | Winter (Oct–May) | Summer (Jun–Sep) |
| Customer charge ($) | 9.85 | 9.85 |
| Minimum charge ($) | 9.85 | 9.85 |
| Tax rate (%) | 3.00 | 3.00 |
| Energe charge($/kWh) | ||
| On-peak hours | 0.1412 | 0.1500 |
| Off-peak hours | 0.0335 | 0.0335 |
| Notes: On-peak hours are defined as 6:00 a.m.–1:00 p.m. and 4:00 p.m.–9:00 p.m. (Monday–Friday) during October–March. 10:00 a.m.–9:00 p.m. (Monday–Friday) during April–September. |
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