公共建筑中暖通空调系统能耗控制方法研究

公共建筑中能源消耗的主要来源是暖通空调，时滞变化是导致暖通空调系统产生能耗的主要原因，为达到节约能耗的目的，研究公共建筑中暖通空调系统能耗控制方法。设计Smith预估器补偿控制回路的时滞；利用PI控制器提升Smith预估器内参考模型与实际模型的匹配度，提升时滞补偿的鲁棒性。通过模糊非线性PI在线优化方法，优化PI控制器的参数，增强控制效果。实验证明:该方法可有效控制暖通空调系统的能耗，将耗电功率低至18 kW；在设定温度出现阶跃变化时，该方法可有效缩短调节时间，减轻控制过程中的振荡现象，降低超调量与能耗。在分析水泵能耗时，该方法的最大阀门开度最大，能耗最低。

Research on energy consumption control method of HVAC system in public buildings

The main source of energy consumption in public buildings is HVAC,and the time lag change is the main reason for the energy consumption of HVAC system.In order to save energy consumption,the energy consumption control method of HVAC system in public buildings is studied.The Smith predictor is designed to compensate the time delay of the control loop.The PI controller is used to improve the matching degree between the reference model and the actual model in the Smith predictor,and improve the robustness of time-delay compensation.Through the fuzzy nonlinear PI online optimization method,the parameters of PI controller are optimized to enhance the control effect.Experiments show that this method can effectively control the energy consumption of HVAC system and reduce the power consumption to 18 kW.When the set temperature changes step by step,this method can effectively shorten the regulation time,reduce the oscillation phenomenon in the control process,and reduce the overshoot and energy consumption.This method has the largest valve opening and the lowest energy consumption.