Abstract
When using an automotive heating, ventilation, and air conditioning (HVAC) system, we can obtain fresh outside air while maintaining the interior vehicle temperature. In this study, a correction equation considering experimental data for automotive indoor air leakage is defined to simulate the ratio of fresh air to recirculated air in the automobile cabin. With this correction equation, numerical results are compared with experimental data and validated. The <TEX>$CO_2$</TEX> concentration in the automotive cabin is evaluated by considering various boarding conditions and mass flow rates of the HVAC system. The <TEX>$CO_2$</TEX> concentration model derived in this study is expected to be used to control the effective air conditioning and become a basic research tool for automotive air quality control system development.
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