Abstract

This study used an indoor plant system to improve the indoor air quality, and discussed the correlation between the CO₂ derived from human breathing and the photosynthesis of plants. This study took peace lily (Spathiphyllum kochii) as the experimental target. The absorptivity of peace lily to CO₂ at the CO₂ concentration of 4000 ppm was 2.4847E-5 m³/h according to the experiment of CO₂ absorptivity of peace lily. The theory and method of computational fluid dynamics were applied for simulating the CO₂ concentration changes in a confined space with and without indoor plants. The constructed experimental environment and numerical simulation were used for validation and comparison. The obtained experimental data matched the CO₂ change curve of the simulation result. Lastly, simulation was conducted using vertical garden to improve the CO₂ concentration in the environment.

Key words: indoor plant, environmental control, computational fluid dynamics.