Search

Considering the unique thermal and load characteristics of underground store, a new DCV strategy has been established in this study. Combining the features of CO2 control with conventional temperature control VAV system, this new system can achieve the PID control for both CO2 and temperature, and a hand-off auto switch mode can be used to operate the system automatically. The system has been modeled by a dynamic simulation system, and a simulations for an existent underground store in Shanghai has been carried out. The results show that, comparing with the conventional CAV system and VAV system, about 22.2% and 17.5% of the annual energy consumption can be saved, respectively, which demonstrates that the DCV strategy is an acceptable technique to control thermal environment and indoor air quality simultaneously in underground stores. [ABSTRACT FROM AUTHOR]