Calculation of equipment energy consumption using a calculator. Calculation of equipment energy consumption using a calculator Calculation of the cost of electrical energy

Most household appliances have a label that provides information about their power consumption and is placed on the back or bottom of the appliance. This label indicates the maximum value of electricity consumed. To calculate your total energy consumption, convert this value to kilowatt-hours (kWh).

Steps

Calculation of kilowatt-hours by device power

Find its power on the appliance label. Most electrical appliances have a label with energy ratings on the back or bottom panel. On such a label, find the power consumption value, which is indicated as “W” or “W”. As a rule, the label indicates the maximum power consumption of the device, which is significantly higher than the average power consumption. This section describes the process of calculating an estimate of kilowatt-hours that is greater than your actual electricity consumption.

• Some devices provide a range of power consumption, for example, “200-300 W”. In this case, select the average value for calculations; in our example this value is 250 W.

1. Watts are a unit of measurement of power without regard to time. By multiplying the power unit by the time unit, you can estimate the amount of electricity consumed and calculate the amount you must pay.

   Since 1 kW = 1000 W, this step converts the units from Wh to kWh.

   • In our example, you calculated that the fan consumes 1250 Wh daily. (1250 Wh) ÷ (1000 W) = 1.25 kWh per day.

2. At this point, you have calculated the amount of electricity (in kWh) consumed by the device every day. To determine your monthly or annual electricity consumption, multiply the daily value by the number of days in the month or year.

   • In our example, over a month (30 days), the fan will consume (1.25 kWh per day) x (30 days) = 37.5 kWh of electricity.
   • In our example, over a year (365 days), the fan will consume (1.25 kWh per day) x (365 days) = 456.25 kWh of electricity.

3. Multiply the resulting value by the cost of one kilowatt-hour. The payment form for electricity indicates the cost of one kilowatt-hour. Multiply this cost by the calculated amount of electricity consumed to determine the amount you must pay.

   • For example, if 1 kWh costs 5 rubles, then you will have to pay for the electricity consumed by the fan (5 rubles per kWh) x (456.25 kWh per year) = 2281.25 rubles (per year).
   • Remember that calculations based on the appliance's label wattage value give you the maximum cost for the electricity you consume - you will actually pay less.
   • If you work with different regions (regions) of the country, find the cost of 1 kWh of electricity in each region. We recommend that residents of Russia open this site.

Calculating kilowatt-hours from current and voltage

1. Find the current value on the device label. The labels of some devices do not indicate the power value. In this case, find the current value, which is denoted as “A”.

2. Determine the voltage value in the electrical network in your region. In Russia and most other countries, the standard voltage in the electrical network is 230 V (220-240 V). In some countries (for example, the USA) this value is 120 V.

   • In the US, large electrical appliances, such as washing machines, can be connected to special 240 V electrical networks. To find out the voltage of the electrical appliance, look at its energy rating label (the label indicates the recommended voltage, but you can assume that the voltage of the electrical network to which the appliance is connected , meets this recommendation).

3. Multiply the current by the voltage. This will give you the power consumption value expressed in watts.

   • For example, the label on a microwave oven states that the current is 6.5 A and the voltage is 220 V. The power of this oven is 6.5 A x 220 V = 1430 W.

4. Multiply the power consumption by the number of hours you use the appliance each day. Power characterizes the amount of energy consumed by the device during its operation. Multiply the power consumption by the average number of hours the appliance is operated each day.

   • In our example, the microwave oven runs for 30 minutes every day. 1430 W x 0.5 hour/day = 715 Wh per day.

5. Divide the result by 1000. This step converts the units from Wh to kWh.

   • In our example: 715 Wh (per day) ÷ 1000 W = 0.715 kWh per day.

6. Multiply the result by a certain number of days. For example, to determine your monthly electricity consumption, multiply the daily value by the number of days in one month.

   • In our example: 0.715 kWh (per day) x 31 days = 22.165 kWh.

In this article I want to give an overview of my new program, which will be useful to the chairmen, power engineers of SNT and other similar organizations where there are many sub-subscribers. With the help of the program, paying for electricity will become much easier.

I already have a similar program:

But that program was made for a specific enterprise and, I must admit, is not suitable for everyone.

My new program has become simpler, more convenient and more functional.

For example, you have a transformer substation where general electricity metering is installed. Using this meter, you need to pay the energy supply organization. Each sub-subscriber has its own counter. But, if you add up the readings of all sub-subscriber meters, the sum will be less than the readings of the main electricity meter. This occurs due to losses in overhead (cable) power lines.

How to take into account the line losses of each sub-subscriber A?

The most accurate way is to provide 2 counters on each line: at the beginning and at the end of the line. But, in real conditions, this is almost impossible to do, and why would you need extra counters?

In my program I took a different path. I distribute electricity losses evenly depending on the electricity consumed. I think this method is the fairest and simplest. This method allows you to distribute absolutely all electricity losses. Other calculation methods will not do this.

At the same time, you must understand that losses are different at each moment in time. The more loaded the cable, the greater the loss of electricity. In other words, if you consume all the power in 1 day, then the losses will be greater than if you consume the same power evenly throughout the entire month.

Now let's move directly to the program.

First page: input of initial data.

All initial data for all metering devices is recorded here. The readings of the main accounting and the readings of all sub-accountants are recorded.

For a more detailed overview of the program, watch the video:

I should note that this program is not included in my software package and is adapted for each object. To receive the program, contact me on the page

The number of household appliances and gadgets is increasing every year, so paying for electricity is an important expense line in the family budget. To properly plan budget loads, it is important to correctly calculate energy consumption. Our online calculator will help you with this.

Electricity metering

An electric meter is a special device for metering alternating current electricity. There are such meters in every home, and they do not count kilowatts or amperes, but . So, a kilowatt-hour is an off-system unit of measurement that demonstrates how much power in kilowatts an electrical appliance consumes in 1 hour of operation. It is for the kilowatt-hours that the meter registers that we pay the electricity producer. We can independently estimate the average daily electricity consumption in order to plan our spending on utilities.

Power consumption calculation

All household appliances have a special nameplate or sticker indicating the main electrical parameters. Most often, the maximum power that the device consumes at peak loads is indicated. Since gadgets and devices operate at maximum only a small part of the time, you can safely reduce the average power of the device by 25%. Let the following electrical appliances be present in the apartment:

• Refrigerator – 500 W;
• TV – 200 W;
• Laptop – 400 W;
• Washing machine – 2000 W;
• Microwave oven – 900 W.

This is the maximum level of power consumption from the electrical network. Moreover, if the TV as a whole has equal consumption, then the washing machine consumes different power depending on the washing mode. Knowing approximately how long each appliance runs each day or week, you can calculate kilowatt-hours. To do this, express the power in kilowatts and multiply by the average operating time:

• Refrigerator: 8 hours a day = 0.5 × 8 = 4 kW/h;
• TV: 2 hours a day = 0.2 × 2 = 0.4 kW/h;
• Laptop: 6 hours a day = 0.4 × 6 = 2.4 kW/h;
• Washing machine: 2 hours per week = 2 × 2 = 4 kW/h;
• Microwave: 10 minutes (0.16 hours) per day = 0.9 x 0.16 = 0.144 kWh.

For monthly consumption, it is enough to multiply each value by 28. The washing machine works 2 hours per week, not per day, so we multiply the power of the “washing machine” by 4. As a result, we get the total electricity consumption for the month:

4 × 28 + 0.4 × 28 + 2.4 × 28 + 4 × 4 + 0.144 × 28 = 210.43

Thus, 210.43 kW/h of electricity is consumed per week. Knowing the cost of one kW/h, it is easy to calculate how much it will cost to pay for electricity per month. However, do not forget about gadgets such as tablets, electronic cigarettes and mobile phones. They don't indicate how much power these devices consume, but it's easy to find out.

Determination of power by current consumption

How to determine the power consumption of a mobile device if its maximum power is not indicated on it? To do this, you need to know the voltage and current. The voltage of all electrical networks in the CIS is standard and is 220 V. However, chargers use a voltage of only 5 V.

The current consumed may vary. For mobile phones or tablets, 1 A chargers are usually used, and for electronic vapor generators (vape mods) - 2 A. It is known that it takes an average of 4 hours to fully charge a device. Thus, the mobile phone consumes:

5 × 1 × 4 = 20 Wh,

and an electronic steam generator:

5 × 2 × 4 = 40 Wh

Consequently, we additionally spend about 1 kW/h per month to charge mobile devices.

Our program uses a similar calculation algorithm to determine energy costs. In this article, we calculated energy consumption manually. The calculator calculates everything automatically. You only need to indicate the operating time per day/week/month and the power of the selected electrical appliances. After this, indicate the cost of one kWh in your region and click the “Calculate” button. The program will display a table of electricity consumption and its cost per day/week/month/year.

You can also calculate the cost of electricity based on the amount of energy you already know. To do this, select the “Consumption” option in the calculator menu and indicate energy consumption in kWh for 1 year. For example, if you have printouts from your electricity supplier for your consumption during the previous year, you can use this value to run our calculator.

Conclusion

Payment for electricity is a significant line of utility expenses. To correctly forecast the family budget, we recommend using our electricity consumption calculator, which can easily be used to determine financial expenses for utilities for a certain period of time.

Below the table are clarifications for some household consumers: calculation of work,.

Dear visitors! This calculator allows you to roughly estimate the electricity consumption of household appliances in Russia and calculate the total cost of their operation per month. However, it cannot serve as the basis for an accurate calculation of payments for utility services. Modern electrical appliances often do not operate at full power 100% of the time they are operating, therefore they do not constantly consume the maximum energy according to their rated power.

The electricity calculation calculator works according to a single-rate tariff and does not take into account differentiation by two or three zones of the day. Check with your supplier for the current cost of one kilowatt-hour of electricity.

Clarifications on the operation of some electrical appliances:

Fridge It works around the clock, but most of the time it only maintains the set temperature without significant power consumption. Modern refrigerators often do not have consumption per hour in their parameters, but consumption per year of operation is indicated. The calculation used the current average consumption of 300 kW/year, which is approximately 35 Wh. For Side-by-side refrigerators (two-door), use 50 Wh (about 450 kW per year) as the average hourly power.

Washing machine power consumption

Washing machine with its 2 kW*h of power declared by the manufacturer, on average it consumes only 1 kW of electricity per cycle of operation (full load, 60 degrees). The table shows the conditional power according to the final consumption of 1 kW per wash.

Computer power consumption

Computer, like many other “smart” devices, in standard operating mode (not gaming, which uses significantly more resources) it consumes very little energy: up to 200 Wh depending on the specific configuration.

Boiler electricity consumption

Boiler (water heating tank), like a refrigerator, is most often connected to the network 24 hours a day, but only part of the time actively consumes electricity to heat water. The calculations used an average total of 8 hours of work per day.

Air conditioner power consumption

Air conditioner In addition to the declared power, it has direct parameters for electricity consumption in cooling or heating modes. The calculations used the average class consumption of 800 W per hour.

There are electricity meters in every house and apartment. They are necessary in order to calculate the monthly electricity consumption to pay for its use.

Meter readings must be taken at the end of the month, monthly, it is recommended to do this on the same date.

If you do not pay on time for the electricity you consume, the organization that services your home will impose a penalty for each late payment. And for malicious defaulters the lights may be turned off altogether.

Previously, electricity meters were installed near apartments, on staircase landings, for each one. Recently, there has been a tendency to install them inside the apartment, for the convenience of taking readings and preventing possible data recording errors.

Electricity calculation method

Meter readings must be taken once a month

The electric meter calculates the electricity consumed in kW/h (kilowatt per hour).

Depending on the service that provides electricity services, you need to give the recorded readings to a staff employee or personally calculate the electricity consumption on the meter for the last month, as well as the payment amount.

This is very easy to do, especially since in certain models of electricity meters the required values ​​are highlighted in a certain color.

There are the following notification methods for electricity consumption:

1. Report the readings in person to the office of the consumer service provider or energy supply organization.
2. Use the functions of remote data transfer via the Internet, if possible.
3. Dictate over the phone.
4. Include the readings in the appropriate box when paying the receipt.

How to take meter readings correctly?

The meter display shows data on the electricity used for the entire time.

Write down these numbers, down to the decimal point. All that comes after it are decimal parts, which change quickly and do not need to be taken into account.

The values ​​of the previous period must be subtracted from the recorded reading. Thus, you get the electricity consumption for a real period of time in kilowatts per hour.

Now you need to multiply the resulting number by the index, which is the tariff for 1 kW/h (this coefficient can be found in previous receipts or checked with the company that provides electricity to your home). The resulting figure is your next payment for electricity.

Good to know: Some apartment owners install two-phase electricity meters, which bring a lot of benefits to their owners, since the tariff is lower at night.

Day-night meters are capable of correctly counting electricity consumption separately for daytime and nighttime. According to the instructions described earlier, calculate two values ​​- electricity consumption over the past period at night and during the day. Multiply each resulting value by the corresponding index and add these numbers.

Residents also pay for the light in the elevator.

ODN is the difference between the readings of a common building electricity meter and the sum of the readings of individual metering devices of all residential and non-residential premises in an apartment building.

This includes energy costs for the following administrative parts of a residential building:

• • dressing rooms, platforms and staircases, attics, roofs, elevators and elevator shafts, built-in parking lots, workshops, various technical rooms in which engineering structures are located, as well as wheelchair spaces;

• • other structures that are intended for the maintenance and use of apartment buildings, including transformer substations and heating points;

• sports and children's playgrounds, which are located within the boundaries of the land plot of a multi-storey residential building.

That is, all energy consumption is taken into account, which goes towards the comfortable use and improvement of the home.

The larger the apartment, the higher the fee for one room.

In order to encourage apartment residents to use energy resources economically, the Russian Federation established a tax on electricity consumed for general household needs.

Law No. 307 “On the procedure for providing utility services to citizens” came into force in the spring of 2006, and energy companies received the right to add to payment documents the amount for energy used in non-residential premises.

At first, the calculation of expenses for one-way services was carried out exactly according to the standards. The amounts charged for the use of energy resources were meager.

But after the approval of Resolution No. 344 “On Amendments to Certain Acts on the Provision of Public Utilities” by the Russian leadership in 2013, the fee is calculated in proportion to the square footage of the owner’s living space. The payment amount depends on whether there is a common house registration meter.

Everyone has the right to know what they pay for

For the sample, we will introduce an indicator that will mean a part of one apartment from the total area of ​​the building.

Example formula:

KOP = PKV / PD

• KOP – payment coefficient;
• PKV – square footage of this apartment;
• PD – area of ​​the house.

For example, the total area of ​​the house is 1900 m2, and part of a particular apartment is 80 m2, which means the indicator will be equal to 0.042.

What to do if there is no communal meter?

The owner of the apartment has a choice - to assign the responsibility for calculating electricity consumption according to the meter to the building management employees or to enter into an agreement to pay for the electricity supply with the company that provides energy sales.

Government Order No. 307 dated May 23, 2006 states that institutions providing energy supply are required to receive payment for services provided no more than the stated norms in the region. Electricity calculations are carried out in the same way as in houses that do not have an electricity meter:

PEL = IEL x PNL x COP

• PEL – electricity consumed per month;
• IEL – ODN index per 1 m2;
• PNZh – total area of ​​common areas.

Let us take as an example the same house with an area of ​​1900 m2, in which non-residential premises are 400 m2. With an indexation of ODN equal to 1.25 kW, the indicator of electricity consumed per month is:
PEL = 1.25 x 400 x 0.042, that is, 21 kW.

Calculation of readings with an installed meter

If you have entrusted the readings of electricity consumption to the company that provides electricity, then when calculating them, the difference between the total house consumption of all dwellings and energy according to the standards in premises that do not have a meter is taken.

We use our conditional apartment with an area of ​​80 m2 for an example calculation:

OEL =(OOD-OKV)/KOP

• OEL – parameter of electricity consumed in a certain apartment;
• OOD – total electrical energy of the entire multi-apartment building;
• OKV - the total expense of the owner or tenant of the home.

If according to the general building meter of a given house, 12,500 kW was consumed, and the amount of electricity used by all residential premises is 11,930 kW, then the OEL of our apartment will be 27 kW.

Important: it is necessary to constantly regulate electricity calculations at the one-way distribution point, and also send readings to the service company every month so that there are no incorrect calculations and overpayments.

If the ODN calculation has not been sent for a certain apartment for a long period of time, then the average amount of consumption for one month is taken into account.

The balance of used and unpaid electricity is divided among residents in proportion to the electricity consumption in each apartment.

If you have an old-style electricity meter (disk type), you can calculate the energy consumption of all electrical appliances currently running using a spinning disk.

Let's assume this figure is 25. We multiply the resulting value by 60 (the number of seconds in a minute), thereby obtaining 1500. One kW of energy is equal to 1200 revolutions. Therefore, the energy consumption of all electrical appliances currently operating in your apartment will be: 1200 / 1500 = 0.8 kW.

In 2004, a federal executive body was created - the Federal Tariff Service (FTS of Russia).

The task of this service is to regulate prices for services and goods, as well as control their use.

On the official website of the Federal Tariff Service of Russia, you can correctly calculate online, based on meter readings, fees for electricity and other utilities, as well as view tariffs for all types of household services for each region.

Note: It should be borne in mind that this resource is for informational purposes only, and the calculation result cannot be used as a payment document.

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