ABSTRACT
ABSTRACT: The main thrust of this paper is to verify possibility of indoor air quality enhancement and energy savings potentials in under-ground parking facilities by adopting the demand-controlled ventilation (DCV) strategy based on the real-time traffic load. For applying DCV approaches to under-ground parking facilities, the minimum ventilation rate per a single vehicle was determined. Two different DCV methods; DCV using the real-time vehicle detection system (i.e. VDS-DCV) and DCV based the variation of indoor CO concentration (i.e. CO-DCV) were proposed. By simulating transient ventilation flow rate and the indoor CO concentration variations for each DCV approach using a commercial equation solver program, applicability of the proposed DCV strategies was analyzed. And then a pilot ventilation system was installed in a real under-ground parking lot for verifying the simulation results. It shows that CO-DCV or VDS-DCV may provide significant reduction of fan energy consumption and good indoor air quality compared with the conventional parking facility ventilation approach.
