Air conditioning was raised once, how much impact on power saving? Yesterday, the reporter went to the State Grid Beijing Electric Power Research Institute for a field visit. In response to the impact of the central air-conditioning adjustment, the researchers of the Academy of Electric Power conducted a professional experiment. The test results show that the central air conditioner can be used to save 20% of electricity; the 1.5-meter household air conditioner can be raised by one degree, and the power can be saved by about 4.5 degrees throughout the day.
In this experiment, the central air conditioner of the main building of the office where the electric power institute is located was selected as the test object. The air conditioner of the main building of the unit belongs to fixed-frequency central air-conditioning, which consists of 4 units. The rated cooling power of each unit is 81.2 kW. The air conditioner determines the indoor temperature based on the temperature sensor to determine whether the unit is running or stopped.
According to reports, the test was selected for two days on the weekend, minimizing the interference and impact on the experimental process due to artificial adjustment of air conditioning temperature and other electrical equipment (such as computer, lighting, etc.). Considering the change of outdoor temperature will also affect the start and stop of the air conditioning unit, and the test will be carried out in different time periods during the day and night.
During the test, the first time period is from 19:00 to 7:00 on July 28 (Friday), and the second time is from 7:00 on July 29 (Saturday) to 19:00 on the same day. It is 26 ° C. The second time period is from 19:00 to 7:00 on July 29 (Saturday), and the fourth time is from 7:00 on July 30 (Sunday) to 19:00 on the same day. The air conditioning temperature is set to 27 °C during these two periods. .
The analysis results show that from 7:00 to 19:00, the air conditioner is set to 26 °C, the average power is 31.96 kW; the air conditioner is set to 27 °C, the average power is 26.31 kW, the average power is reduced by 17.68%, and the power saving is 67.8 degrees. From 19:00 to 7:00, the air conditioner is set to 26 °C, the average power is 22.80 kW; the air conditioner is set to 27 °C, the average power is 16.88 kW, the average power is reduced by 25.96%, and the power saving is 71.04 degrees.
“The power consumption is equal to the power multiplied by the time, which is equivalent to a one-degree increase and 20% power saving. If there are other gear adjustments, the experimental results will be different, for example, from 24 ° C to 25 ° C, the power consumption is smaller. It will save more electricity." Researchers suggest that business units such as shopping malls and office buildings use more energy-efficient inverter air conditioners, and the small air volume mode consumes less power when the same temperature is set.
In addition, the researchers also conducted an analysis test on the temperature and energy consumption of household air conditioners. The results show that during the summer peak period, the average temperature is 32 °C, a 1.5-hp air conditioner, the cooling area is between 25 square meters and 30 square meters, if the temperature setting is increased by one degree, continuous operation for 24 hours, The average power is reduced by 17.1%, and the average power is reduced by about 4.5 degrees. Therefore, it is recommended that the public's own air conditioning temperature be adjusted to 26 ° C to 28 ° C range.
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