多台冷水机组联合运行优化控制策略

Optimal control strategy for combined operation of multiple chillers

摘要:

冷水机组通常占建筑物系统总能耗的主要部分，因此冷水机组运行数量控制在实现空调系统节能方面起着重要作用。针对多台冷水机组联合运行时台数选择和负荷分配不合理的问题，文章将通过TRNSYS模拟得出的负荷值聚类分析，确定不同负荷值对应的冷水机组运行台数，并提出一种冷水机组排序优化控制方法改善顺序控制方式以实现其合理运行与节能。以某大型办公建筑为例，将优化控制前后冷水机组运行的进行总能耗对比。实验结果表明:与顺序控制相比，冷水机组优化控制后两个工作日总能耗分别节约126.1kW和342.5 kW，节能率分别为4.15%和5.22%。通过利用冷水机组顺序优化控制可满足建筑的冷负荷需求同时实现降低系统能耗，在空调系统节能方面具有工程实际应用价值。

Abstract:

Chillers usually account for the main part of the total energy consumption of building systems, the control of the number of chiller operations plays an important role in achieving energy savings in air conditioning systems. Aiming at the problem of unreasonable number of chillers and load distribution of the combined operation of multiple chillers, the article used cluster analysis of load values obtained from TRNSYS simulation to determine the number of chillers corresponding to different load values, and propose a chiller sequencing optimization control method to improve the sequencing control method to achieve the reasonable operation and energy saving of chillers. Take a large office building as an example, the total energy consumption of the chillers operation before and after the optimization control is compared. The experimental results show that compared with the sequential control, the total energy consumption of the chillers after the optimal control of the two working days is 126.1 kW and 342.5 kW, respectively, and the energy saving rates are 4.15% and 5.22%, respectively. By using the chiller sequencing optimization control, can meet the cold load demand of the building and reduce the energy consumption of the system, which has practical application value in energy saving of the air conditioning system.