多台冷水机组联合运行系统的最佳性能系数(COP)

The Optimal Control Strategy for the Operation of Multiple Chillers System Based on Coefficient of Performance(COP) Optimization

根据空调负荷连续性和冷水机组承担负荷非连续性的特点,以及冷水机组的性能系数(COP)与其部分负荷率R有关的特性,提出一种基于最佳COP的冷水机组负荷分配方法.采用回归方法获得冷水机组R与COP的关系并建立机组能耗目标函数,利用序贯加权因子法获得最佳的负荷分配率.将该方法用于多台冷水机组联合运行系统的在线运行控制.试验结果表明,该优化控制策略优于常规的负荷等额分配控制或区间负荷比例分配控制策略.

According to the characteristics of continuous load and non-continuous chillers output and the relation between coefficient of performance（COP） and part load ratio of a chiller, an online optimal operation strategy was presented. The regression method is employed to obtain the relational function of COP and R, and also the objective function of chillers energy consumption is formed. Sequential weight increasing factor technique （SWIFT） method is employed to solve the objective function to obtain optimal R. The test results show that this optimal control strategy is better than the conventional control strategy for multiple chillers system.