dwelling modern man fully equipped household appliances. These devices are reliable assistants in Everyday life. But, the more they appear in the house, the more the question of saving electrical energy arises. To solve it, you need to know how much electricity each household appliance consumes separately.
The need to calculate the household load
To obtain preliminary calculated data for the month, the consumer must know the power of household appliances. That is, the exact number of watts at the most costly mode of operation. This will make it possible to determine how much electricity each household device consumes, as well as find out the largest load.
To measure, you do not need to have special skills, but just look at the device passport and determine the consumption in one hour. For example, find out how much electricity a multicooker consumes.
From the results obtained, it can be seen that the power consumption of household electrical appliances is divided into groups in this order:
- devices with a powerful load are a hob, microwave, oven, air conditioning unit, home theater, iron, water heater;
- devices with less electrical energy consumption - this is a home theater, refrigerator, computer equipment, lighting devices, etc.;
- economical loads are LED lighting fixtures, electronic equipment in the form of music centers, chargers and others.
To make it easy to determine how much electricity household appliances consume, it is necessary to systematize the information received in a tabular form.
| Instrument name | Power, W | Current, A | Power factor |
|---|---|---|---|
| microwave | 1085 | 5,07 | 0,92 |
| refrigeration unit | 93 | 0,5 | 0,87 |
| kettle | 2121 | 9,29 | 0,99 |
| iron | 856 | 3,97 | 0,98 |
| computer | 220 | 1 | 0,63 |
| water pump | 1500 | 6,8 | 0,9 |
| air conditioner | 2000 | 9 | 0,8 |
| treadmill | 100 | 0,45 | 0,6 |
| incandescent lamp | 60 | 0,25 | 1 |
| LED lamp | 12 | 0,072 | 0,45 |
The table shows the electricity consumption per hour. The total consumption for the period can be obtained by adding all the capacities together. Also, from these values, you can calculate the electricity consumption for the month.
Method of calculation
When you have all the information about each device at hand, you need to determine how much kW is consumed in 30 days. It is necessary to calculate this for each device separately. For example, we take the hood power of 50 W, multiply by a factor of 0.5 and multiply by 24 hours. We multiply the result by 30 days and find out how much electricity this household appliance will consume per month.
Economy sector
The analysis method used will tell you how much kW each device consumes and where the consumption is highest. This will help to significantly reduce energy consumption and save money.
As practice suggests, the greatest load in the house is the electric oven. Its average power is 5 kW per hour. Here you should think about replacing it with a device with less consumption.
In second place "waste" is the refrigerator. Its high consumption is obtained due to frequent switching on while maintaining the programmed temperature. The larger the interior space, the more the refrigerator consumes electrical energy.
The third place in such a competition is occupied by a washing machine. Its load on the electrical network is on average 2 kW. It is possible to reduce the consumption of electrical energy during the washing process if the water heating temperature is reduced and the washing cycle is shortened in time.
Do you take phone chargers out of sockets? Or "charging the air"?
Do you take phone chargers out of sockets? Or "charging the air"? I'm pretty tired of reproaches from my family that supposedly the standby power consumption costs us half the electricity bill. Thanks to the “air-charging” power supplies and the computer plugged into the outlet, but in fact turned off, the energy crisis came. Whether this is so will be shown by the simplest "investigative experiment" with a wattmeter.
How much power does a disconnected charger use?
You can find out how much electricity is drawn by charging from a smartphone using the cheapest network wattmeter for $8.
We insert the wattmeter into the socket, connect the device and look at the numbers on the scoreboard.
The device did not respond to any modern charger from my home arsenal - a smartphone, an iPod, a tablet. In fact, fractions of a watt are still used, as I read, rummaging through the topic. But for a year, about 1 kW accumulates from several charges connected around the clock.
Chargers connected to the network with LED indicators can take a little more, but the wattmeter does not fix this.
The device began to react when I connected 5 chargers to the extension cord - 0.3 watts. Justice has triumphed, and yet they began to reproach me with fire safety.
What devices really "suck" energy in standby mode?
Chargers on transformers do consume electricity. But in everyday life, such power supplies are not common and it is unlikely that anyone would think of leaving them in the outlet. A car battery charger, an LED strip power supply, a laptop power supply, and a AAA battery charger come to mind. Modern light-weight charging transformers do not have in their design.
But the computer took 1.3 watts from the network in the off state, the monitor 23 ″ 0.8 watts. The microwave in standby mode eats as much as 1.6 watts for a luminous watch, which I still can’t set up (and after measuring, I still unplugged it from the mains ...).
We don’t keep TVs, devices with a control panel or the so-called “soft” start eat well. Plus those annoying LEDs all over the place that need power too.
A multicooker in standby mode consumes 1.4 watts, a gas double-circuit boiler - 2 watts.
Electricity consumption in standby mode for a kettle, a toaster and a table lamp is zero, and I don’t see the point in checking the refrigerator, no matter how much you “eat” - you can’t get anywhere.
Why unplug appliances?
If the energy consumption of household appliances is negligible, then why waste time turning them off? I have already spoken about annoying light bulbs, and this is the first reason for me to get everything that glows from the outlet. The second reason is electromagnetic radiation, around which there are so many speculations and myths. You shouldn’t put on a “tinfoil hat”, but if, without fanaticism, you simply unplug the devices from the network when they are not needed, you can at least say with a clear conscience that you did everything you could. The third reason is that chargers and power supplies burn much more often if you let them hang in outlets.
How to reduce energy consumption
- Turn off the lights when leaving the room.
- Since the iron is the most voracious invention in the household, by collecting several sets of linen, you can reduce the amount of heating of the appliance from scratch. Unplug it a couple of minutes before finishing ironing.
- The washing machine washes cotton well already at 60 degrees, use the 90-degree mode as little as possible.
- In an electric kettle, heat exactly as many cups as you need, it makes no sense to boil 1.7 liters for 2 cups of tea.
Total power household appliances is 47,782 W or 47.782 kW.
Given these data, 1000 watt-hours (or 1 kilowatt-hour) is enough to:
1. Get 60,000 messages on your autoresponder
2. Open 7200 cans with an electric can opener
3. Listen to 2143 songs on a portable stereo recorder
4. Print 1333 pages on the printer
5. Prepare 400 cocktails in a blender
6. Knead with a mixer 300 servings of dough
7. Charge mobile phone 278 times
8. Listen to 250 songs through your stereo
9. Make 100 toasts in the toaster oven
10. Make 67 hairstyles with a hair curler
11. Cook 36 croutons in a toaster
12. Talk on the phone for 15 days
13. Use a wireless Wi-Fi router for 6 days
14. Use clock radio for 4 days
15. Record 45 movies on a VCR
16. Use satellite dish 67 hours
17. Watch 29 movies on a DVD player
18. Use an energy-saving light bulb for 56 hours
19. Use cable box 50 hours
20. Use the aquarium for 33 hours
21. Use digital video recorder (DVR) 30 hours
22. Use a laptop for 20 hours
23. Use a 60-watt incandescent bulb for 17 hours
24. Use a humidifier for 13 hours
25. Use a ceiling fan for 13 hours
26. Use an electric blanket 1 night
27. Use portable fan 10 hours
28. Use a computer (system unit) 8 hours
29. Use monitor for 7 hours
30. Watch 13 episodes of a sitcom on CRT TV
31. Watch 9 episodes of the sitcom on LCD TV
32. Use refrigerator for 5 hours
33. Use a game console for 5 hours
34. Use a dehumidifier for 3 hours
35. Watch 6 episodes of a sitcom on a plasma TV
36. Use the freezer for 4 hours
37. Microwave 13 meals
38. Make espresso with the espresso machine 11 times
39. Iron 5 shirts
40. Make 4 hairstyles with a hair dryer
41. Make 4 bags of popcorn in a popcorn machine
42. Wash clothes in washing machine 3 times
43. Brew coffee in a coffee maker 3 times
44. Use a water heater for 2 hours
45. Cook 2 meals on the electric stove
46. Vacuum for an hour and a half
47. Use room air conditioner for 1 hour
48. Use the heater for 40 minutes
49. Bake 1 cupcakes in the oven
50. Use central air conditioner for 12 minutes
51. Use the electric oven for 3 minutes
52. Use the dryer for 18 minutes (enough for 0.4 full cycle drying)
53. Use the dishwasher for 33 minutes (enough for 0.3 machine cycles).It is worth noting that watt (kilowatt) and watt-hour (kilowatt-hour) are two different units of measurement and they refer to different physical quantities. Because of similar titles these concepts are often confused in everyday usage, especially when we are talking about electrical appliances. In watts (W) and kilowatts (kW), power is measured, that is, the amount of energy consumed by the device per unit of time. A watt hour (Wh) or kilowatt hour (kWh) are units of measure for the energy produced or work done by an electrical appliance and are used primarily to measure household or economic electricity consumption.
These two quantities are related as follows. If a 1000 watt air conditioner worked for 1 hour, it required 1000 watt hours (or 1 kilowatt hour) to run. A 1-watt answering machine will consume the same amount of power in 1000 hours.
Source: pochitat.com
