A NUMERICAL STUDY ON NATURAL VENTILATION OF TWO CONNECTED CHAMBERS IN CONNECTION WITH AN AMBIENT ENVIRONMENT

A numerical simulation study on natural ventilation of two connected chambers in connection with anambient environment is presented in the paper. Extending a model of single-room displacementventilation, this study addresses a space consisting of two chambers connected by one opening at thelow level of the shared wall. A thermal load is placed only in one chamber, referred as a forced chamber,and the other chamber, unforced chamber, has no heat load. The space is connected to the outsideambient environment to have displacement ventilation in both chambers. The numerical simulationstudy of the flow pattern in this geometrical arrangement is presented. This study focuses on differentschemes of connecting openings to the ambient environment in the unforced chamber and discussestheir effects on natural ventilation in the space. The study shows that the opening areas in the forcedand the unforced chamber affect the effective opening area in the space and modify the air change ratein the space. The important parameters, such as the position of the opening, determining air changerate in the space are discussed to understand thermal comfort designs in the built environment.