Using an air conditioner with too small a capacity for a room that is too large, high outdoor temperature but turning on the air conditioner at a low temperature causes a lot of energy consumption... are the reasons why the air conditioner consumes a lot of electricity.
The machine capacity must be suitable for the room area.
Prof. Dr. Nguyen Duc Loi, Association of Science and Technology of Refrigeration and Air Conditioning, said that many people called him to ask, if the air conditioner is turned on for 8 hours every day, how much electricity will it consume? Actually, the electricity consumed by the air conditioner depends on many factors. First, it depends on the capacity of the air conditioner, a 9,000 BTU machine installed in a small room will consume much less electricity than a 24,000 BTU machine installed in a large room.
In case of large room but installing a machine with small capacity, the electricity will be consumed more because the machine has to run continuously to cool, without rest time. Then the life of the machine will also be significantly reduced. Therefore, when installing air conditioner, you need to refer to the manufacturer's specifications and based on the room area to install a machine with appropriate capacity.
In fact, there are many factors that affect the power consumption of air conditioning. For example, if the room is not well insulated, not airtight, or if the air conditioner is old and has old technology, it will consume more electricity.
Improper installation of air conditioners also wastes a lot of electricity, even causing them to burn or break down. For example, the outdoor condenser is installed in a position where the sunlight shines directly or there is an obstacle in front, the indoor condenser if installed in the wrong position will cause the air conditioner to not be distributed evenly in the room, which is also the cause of wasting electricity...
The temperature should not be set too different from the outside temperature to save electricity.
Second, the electricity consumed by air conditioning depends on the outdoor temperature and the indoor set temperature. The higher the difference, the more electricity is consumed. Similar to water pumps, the larger the difference in pump height, the more electricity is consumed. Pumping 1m3 of water to a 6-storey house takes longer and costs twice as much electricity as pumping to a 3-storey house. The same goes for air conditioning. The indoor temperature is the same at 27 degrees Celsius, but the outdoor temperature is 35 degrees Celsius (a difference of 8 degrees) and will cost twice as much electricity as when the outdoor temperature is 29 degrees Celsius (a difference of 4 degrees). Therefore, in autumn and spring, when the outdoor temperature is lower than 26 degrees Celsius, air conditioning should not be used.
Turning on the air conditioner during the day consumes twice as much electricity as at night.
“It is hotter during the day than at night, so a machine operating for 8 hours during the day can consume twice as much electricity as operating at night,” said Professor Nguyen Duc Loi.
In addition, air conditioners consume a lot of electricity due to users' habits. Many people turn on the machine and set the temperature to the lowest possible. This does not cool the house faster but also wastes unnecessary electricity. Every 1 degree reduction costs the air conditioner 5-7% more electricity. Therefore, setting the room temperature closer to the outdoor temperature will save electricity. Or many people have the habit of just turning off the air conditioner using the remote control. In this state, the air conditioner still consumes about 15W of standby electricity, which is about the size of 2 small light bulbs.
Refrigerators and air conditioners are the two appliances that consume the most electricity in hot weather. For household refrigerators, because they are used to preserve food, the motor capacity is small (depending on the size of the refrigerator, from 60W-250W), but they run almost all year round, so the electricity consumption is not small. On hot days, when the outside temperature increases, the electricity consumption of the refrigerator also increases.
For large household air conditioners (750W to 1900W), they are usually only used when the weather is hot or cold, and are rarely used during the transition between spring and autumn. However, because of their large capacity, they consume a lot of electricity. It can be said that when the air conditioner is turned on, the electricity consumed is comparable to turning on an electric stove to cook.
Professor Nguyen Duc Loi advises that the simplest way to save electricity is to use less, set the room temperature as high as possible, close the doors but ventilate the room every 3-4 hours to ensure enough oxygen. When the temperature outside the house drops below 26 degrees Celsius, you should take advantage of the natural wind to cool the room to avoid having to turn on the air conditioner.
Some notes on using air conditioner to save electricity: - Room: Sunshade for outside windows, curtains inside - Air conditioner: Choose to buy genuine, new technology machines, the more energy-saving stars the better. 5-star machines can save up to 23% energy compared to 1-star machines. - Standard installation: + The condenser should be placed in a cool, airy place, away from sunlight, dust, and wind. + The condenser must also be placed in an open space to distribute air evenly throughout the room. + The gas pipe connecting the two units should be as short as possible (limit for room air conditioner is 5m). + The height difference between the condenser and evaporator should be as small as possible (the limit for room air conditioning is 3m). + Vacuuming must be done well, if there is still non-condensable gas in the system, power consumption will increase. + Charging the gas just enough, too little or too much gas will make the machine "eat" more electricity. - The temperature should be set at 25 degrees Celsius or higher during the day and 27 - 28 degrees Celsius at night. - Using a fan while the air conditioner is on can also save about 10% energy. - Turn off the air conditioner completely with the circuit breaker when going out. - Clean the condenser and evaporator periodically once a year, and the evaporator dust filter twice a month. | |
According to SK&DS
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