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A family is calculated based on the use of 15 light bulbs
1. Electricity fee for ordinary light bulbs:
15 lamps x 40W/pcs x 5 hours/day x 30 days = 90000W/hour = 90 degrees
Monthly electricity bill = 90 kWh x 1 yuan/kwh = 90 yuan
2. Electricity charges for energy-saving lamps:
15 lights x 8W/pcs x 5 hours/day x 30 days = 18000W/hour = 18 degrees
That is to say, after using energy-saving lamps, this family can save electricity bills every month: 90 yuan - 18 yuan = 72 yuan, which can save 864 yuan in electricity bills a year.
A textile factory is calculated based on 100 lights for 24 hours
1. The original T8 fluorescent lamp is 40W, the actual energy consumption is 40W+10W (ballast)=50W;
100 x 50W/pc x 24 hours x 30 days x 12 months = 43200000W/hour = 43200 degrees
The annual electricity cost is 43200 degrees × 1 yuan / degree = 43200 yuan
2. Replacement T5 energy-saving bracket lamp, the actual power consumption is 26W;
100 x 26W/pc x 24 hours x 30 days x 12 months = 22464000W/hour = 22464 degrees
Annual electricity cost 22464 kWh x 1 yuan/kWh = 22464 yuan
3. Energy saving every year:
43200-22464=20736 yuan
