Identification of air conditioning energy conservation technologies and measures（1）: misconceive of “26 ℃ air conditioning energy conservation motion”

Considers that the stipulation that “Indoor air conditioning temperature establishment should not be lower than 26 ℃ in public buildings in summer” initiated by some non-governmental organizations and set by the government document has merely a little effect. Points out that the primary factors influencing human body’s comfort are human body activity metabolism rate, heat insulation value of clothing, air temperature, radiation temperature, air velocity and humidity. Therefore it seems risk over simplification regulating the indoor air temperature limit of 26 ℃ regardless of locations and would cause discomfort in some air conditioned buildings. Analyses the influence of different temperatures and humidities on energy consumption of the central air conditioning systems. The result shows that it is more preferable to decrease the indoor relative humidity than raise the indoor dry bulb temperature limit, in order to obtain better human body comfort and indoor air quality at the same time of saving energy.