How to calculate power consumption of electrical appliances in the home
(Baonghean.vn) -The power consumption published in the technical specifications of electrical equipment will help consumers calculate the monthly power consumption, thereby having a reasonable power saving plan for the family.
Formula for calculating electricity consumption:A = Pt(A: amount of electricity consumed in time t; P: capacity (unit KW); t: usage time - unit hour).
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| The capacity of the device is written on the packaging. |
* Below are the power consumption of some common electrical appliances in households. The parameters given are for reference only and may deviate from reality but not significantly.
- Fridge:The refrigerator has a capacity of 120W, in 1 day (refrigerator operates for 24 hours) the electricity consumption is about 2.88 KWh (0.12KW x 24 hours).
In addition, if the product's energy label mentions power consumption, it can also be used to calculate the relative amount of power the device consumes in 1 day; just take the amount of power consumed in 1 year and divide it by 365 days to get the amount of power the device consumes in 1 day.
For example, on the energy label there is the parameter "Electricity consumption": 485kWh/year, so in 1 day the refrigerator will consume about: ~485kWh/365 days = 1.32 kWh.
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| The amount of electricity consumed in 1 year on the energy label of the refrigerator. |
- TV:A 14-inch TV with 40W capacity, used for 25 hours, consumes 1 KW; an 18-inch TV with 65W capacity, used for 15.4 hours, consumes about 1KW/hour.
- Electric rice cooker500W capacity used for 2 hours consumes 1KW hour. 750W capacity used for 1.3 hours consumes 1KW hour.
- Hair dryer1,000W capacity, according to this specification, the machine will consume 1kw of electricity if operating continuously for 1 hour.
- Front loading washing machine:With a capacity of 1,240W, the machine will consume 1.24kw of electricity in 1 hour of washing.
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- Vacuum cleanerUsually introduced with maximum capacity, that is, when using the largest suction, about 1,800W; if the machine operates continuously for 30 minutes, the power consumption is nearly 1kw.
- Induction cookerWith a capacity of 2,200W, when used for 2 hours a day, the amount of electricity consumed in 1 day is about 4.4 kWh (2.20kW x 2 hours), the amount consumed in 30 days is 123kW.
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- Air conditioning:An air conditioner has a capacity ranging from 800 - 850 W; 12,000 BTU machines have a capacity of 1,500 W. Thus, if a 9,000 BTU air conditioner is used for 1 hour, it will consume 0.85 kWh (nearly 1 kWh); a 12,000 BTU air conditioner will consume 1.5 kWh after 1 hour of use.
Actual power consumption may be less because the power level indicated on the device is usually the maximum power and electrical devices do not always run at maximum power. Especially with electrical devices equipped with Inverter compressors that can save electricity, the power consumption will also be lower.
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| Electric power consumption label. |
Some ways to choose energy-saving devices *Choose products with energy consumption labels. In Vietnam, there are 3 types of energy labels affixed to electrical equipment: confirmed energy labels, comparative energy labels and zero-star energy labels. Energy label (energy label) is triangular in shape, printed with the Vietnamese energy star, used for products with performance at or above the maximum energy performance level. The zero star energy label is usually used for products whose energy efficiency falls below a minimum level. Comparative energy labels (or comparative energy labels) are rectangular in shape; they are affixed to electrical appliances with different levels of energy efficiency, divided into 5 levels, each level is 1 star. The more stars an appliance has on its label, the higher its energy saving ability. *Choose devices that apply modern technology: Inverter technology, Plasmaster technology,... Consider choosing the appropriate electrical equipment capacity; depending on the needs and number of users, choose the machine capacity. |
Ngoc Anh
(Synthetic)
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