基于预测稳态时房间CO_2浓度的新风量控制策略

Control strategy of outdoor air volume based on predicted steady room CO_2 concentration

变风量空调系统新风量控制中,传统的控制策略不能兼顾既满足多房间室内空气质量又充分减少新风负荷的要求。针对多房间CO2浓度的控制要求,提出了一种通过在线预测稳态时房间CO2浓度控制新风量的方法。通过实时预测各个空调房间稳态时的CO2浓度,选择CO2浓度最高的房间作为检测房间,控制其CO2浓度为设定值,其他房间的CO2浓度都小于设定值。给出了其理论依据和在线稳态预测的步骤。与新风比修正新风量控制方法的对比结果表明,该方法在保证多房间CO2浓度满足要求的基础上有效减少了新风负荷。

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.