The formula for calculating power consumption for the most standard electrical equipment
Most household electrical appliances being circulated today are required to provide specifications such as power consumption, serial number, place of origin… From these parameters, you can easily calculate monthly power consumption of that device through the following simple formula:
Formula for calculating power consumption: A = P xt
A: The amount of electricity consumed in time t
P: Power consumption (unit kW)
t: Time (unit: h)
Below is the electricity consumption of some electrical appliances commonly found in households. The parameters given are for reference, may deviate from reality but not significantly.
Refrigerator: With a refrigerator with a capacity of 120W and continuous operation 24 hours/day, the electricity consumption is about 2.88 KWh (0.12KW x 24h).
In addition, if the product’s energy label mentions power consumption, you can also rely on that to calculate a relative amount of electricity that the device consumes in 1 day. You just need to take the amount of electricity consumed in 1 year divided by 365 days to get the amount of electricity consumed by the device in 1 day.
For example, on the energy stamp of the AQUA refrigerator in the picture below, there is a parameter “Power consumption”: 485kWh/year, so in 1 day the refrigerator will consume about: ~485kWh/365 days = 1.32 kWh
Television: TV 14 inch capacity 40W, using 25 hours consumes 1 KW. 18-inch TV with a capacity of 65W uses 15.4 hours and consumes about 1KW/hour.
Electric cooker: 500W power use 2 hours consume 1KW hour. Power 750W uses 1.3 hours and consumes 1 KW hours.
Hairdryer: 1000W capacity, the machine will consume 1KW of electricity if it works continuously for 1 hour.
Front-loading washing machine: capacity of 1,240W, the machine will consume 1.24 KW of electricity in 1 hour of washing.
Vacuum cleaner: If you use it at maximum power with the maximum suction power of about 1800W continuously for 30 minutes, the electricity consumption is close to 1KW.
Air-conditioner: Normally, an air conditioner has a capacity of 800 – 850W, 12,000 BTU machines have a capacity of 1,500W. Thus, in 1 hour, a 9,000BTU air conditioner will cost 0.85 KWh (nearly 1 amount of electricity) and a 12,000 BTU air conditioner will consume 1.5 electricity.
However, the actual power consumption may be less, because the power level written on the device is usually the maximum capacity and we do not always run the device at this level. Moreover, with devices equipped with inverter technology capable of saving electricity, the power consumption will also be lower.
By now you must have known how to calculate the power consumption of the device, right? However, these numbers are for reference only because the amount of electricity consumed depends on the usage habits (frequency of impact on the device such as the number of times the refrigerator is opened and closed) and external influences (hot weather). make cooling equipment such as refrigerators and air conditioners work harder).