Back Number [May 2024 Newsletter] Air Conditioner Energy Saving Measures

External roll screens are helpful for energy-saving measures with air conditioning.

Reasons Why an External Roll Screen Can Contribute to Energy Saving for Air Conditioners [Prevents Efficiency Loss of Outdoor Units in Scorching Heat] When direct sunlight hits the outdoor unit, combined with radiant heat from the ground, the surrounding temperature rises significantly. This prevents the outdoor unit from dissipating heat effectively, leading to increased electricity consumption. By installing the outdoor unit in a shaded area, its efficiency improves, resulting in energy savings. However, it is crucial that the sunshade does not block the ventilation openings of the outdoor unit. Poor airflow can cause the hot air released to be re-absorbed, significantly reducing cooling efficiency. Care must be taken with commercially available outdoor unit covers, as those that block ventilation openings can have the opposite effect. Additionally, typhoons and bad weather can occur, so it is preferable for the sunshade to be easily removable or installable. (Image Sub-Image 1)

Source: Daikin demonstrates that simple measures can reduce air conditioner power consumption by over 20%.

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Shade feels cool by suppressing radiant heat. In the sun, in addition to direct sunlight from above, radiant heat from sidewalks and roads that have heated up to nearly 50°C envelops your feet. On the other hand, in the shade of trees, the temperature above is about 30°C and the sidewalk at your feet is about 32°C. Both above and below are lower than human skin temperature, allowing heat to dissipate from the body. This is why you feel cool when you enter the shade. Source: Ministry of the Environment, Measures for Urban Areas Against Extreme Heat (Experimental image is sub-image 2) "Blocking sunlight entering the room also has a significant energy-saving effect." After cleaning the air conditioner filter, installing sunshades made of reeds outside the window, and improving airflow around the outdoor unit, it was confirmed that the room saved 21.8% of air conditioning power consumption compared to a room with no energy-saving measures. Source: Daikin, Demonstrating that simple measures can reduce air conditioning power consumption by over 20%.