Abstract：

The air conditioning system as the core of the building demand response, has a greater potential for flexibility. In order to maximize the benefits of demand response and to optimize the configuration and regulation, it is necessary to clarify the flexible characteristics of air conditioning energy use. However, most existing studies rely on simulation to investigate the flexible characteristics of air conditioning energy use during demand response, which often fails to accurately reflect the actual operating conditions, resulting in unclear flexible characteristics, which leads to irrational regulation and low efficiency. In view of the above problems, this study selects two office buildings to carry out demand response experiments under different working conditions, analyses the indoor comfort during the set temperature regulation based on the temperature change rate and predicted mean vote (PMV) indicators, and analyses the air conditioning flexible adjustable potential interval under different working conditions by the flexible capacity and flexibility ratio. At the same time, the flexible characteristics of the building thermal storage during the demand response period are studied by the internal surface temperature of the thermal storage body. The measured results show that during the demand response period, when the set temperature is adjusted by 1-2 ℃, both can maintain better indoor comfort. At the same time, the two buildings can provide a flexible load quantity of 10-20 W/m2during the demand response period, which can realize a load transfer of 28.3%-83.1%. The results of this paper can provide the index support and measurement basis for the flexible quantification of air conditioning systems, which is of great significance for building energy conservation under the goal of “double carbon”.

Keywords:office building; air conditioning system; flexible load; demand response; temperature regulation; indoor thermal comfort; building thermal storage body