Control strategy of outdoor air volume based on predicted steady room CO2 concentration

Traditional control strategies can not satisfy the demands of multi-room indoor air quality and reducing outdoor air load fully in outdoor air volume control of variable air volume air conditioning systems. According to the control requirements of multi-room CO₂ concentration, proposes a control strategy of outdoor air volume based on the online prediction of steady room CO₂ concentration. Through the real-time prediction of steady CO₂ concentration in each air conditioning room, takes the room with the highest CO₂ concentration as detected room and controls its CO₂ concentration to meet the set value, while the CO₂ concentration in other rooms is less than the set value. Presents the theoretical basis and steps of on-line steady prediction. Compared with the outdoor air ratio correction control method, the proposed control strategy can reduce the outdoor air load effectively on the basis of meeting the requirements of multi-room CO₂ concentration.