Abstract
The purpose of this study is to clarify the energy savings by soil and lawn covered roofs for office buildings. Three kinds of experimental roofs were built in Kumamoto City, the thermal performance of which was measured by a microcomputer. A computer model for simulating the thermal performance of soil and lawn covered roofs was developed in which the microclimate in the leaf-air layer was considered. The preciseness of the model was made clear by comparing the simulation results with the measured ones. Using this model and a multiroom simulation program called PSSP, the air-conditioning loads of office buildings with four different kinds of roofs were calculated and the energy savings by soil and lawn covered roofs were analyzed quantitatively.
