空调节能技术和措施的辨识(1):“26℃空调节能行动”的误解

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

认为由民间组织倡导、由政府下文执行的"公共建筑夏季室内空调温度设置不得低于26℃"的规定收效甚微。指出影响人体舒适感的主要因素是:人体活动的代谢率、服装的隔热值、空气温度、辐射温度、风速和相对湿度,因此不分场合地规定"公共建筑夏季室内空调温度设置不得低于26℃"有过于简单化之弊,其后果将导致部分空调建筑内人体的不舒适。分析了不同温湿度对集中空调系统能耗的影响,结果表明,与其提高室内的干球温度,不如降低房间的相对湿度,在节能的同时,能获得更佳的人体舒适感和室内空气质量。

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.