Research on the Thermal Environment of Multistory Parking Garage Under a Green Roof

Abstract

The influence of the rooftop greening of the multistory parking garage exerted on the thermal environment of the parking lot space under the roof was analyzed based on the result of the measurement of PMV, WBGT, and the ceiling surface temperature. As a result, in summer, it has been found that the parking lot space under the roof fell the hot thermal environment and the ceiling surface temperature reached 47.6degree C on 10 of July in 2008 at the place where roof greening had not been done, and this may increase the average radiation temperature. Average WBGT was 29.1degree C and average PMV was 2.5 from 11:00 until 17:30 on the same day at the place where roof greening had not been done. On the other hand, the decrease of about 0.6 was observed with average PMV and about 0.9degree C in average PMV during the same period of time at the place where roof greening had not been done. Though the difference was smaller than in summer, the lower thermal environment was also observed in autumn at the place where roof greening had been done.