| 초록 |
Coal-fired power plants, a traditional energy generation, and internal combustion engine vehicles emit NOx, SOx, fine dust, and CO2, which deteriorates air quality. In such a situation, indoor ventilation is extremely limited and highly dependent on air purifiers. However, air purifiers only remove fine dust but cannot remove naturally occurring CO2 through breathing. Since one person emits 19L of CO2 per hour, indoor CO2 concentration rapidly reaches 2000ppm, exceeding the recommended level in the indoor space. In this study, a membrane system was used to control the CO2 concentration in the room. The optimal conditions for indoor CO2 control were considered by process variables such as pressure ratio and stage-cut of the membrane module. The CO2 molecules within a specific volume were selectively removed by the membrane and circulated to create a pleasant environment. In addition, the enriched CO2 on the permeate side was applied to indoor plant cultivation to increase plant growth. |
