基于动态负荷需求分析的冷冻站测控系统设计

Design of Chiller Plant Control Based on Dynamic Load Requirements Analysis

依据某病房办公楼空调系统的历史运行数据,进行了动态负荷需求分析,研究了空调运行冷负荷次数、时间频数和空调系统循环水温差随空调负荷变化趋势,提出了将模块化冷水机组4∶2∶4分组控制和空调水系统恒温差变频控制相结合的按需供冷方案。搭建了以PLC为核心的节能控制系统,经过运行实验,节能率26.1%,达到了很好的节能效果和经济性。

According to a ward office building air conditioning system historical operation data,the number of air-conditioning cooling load operation is analyzed,the time frequency and air conditioning systems circulating water temperature difference trend with air-conditioning load are researched,a 4∶2∶4 group control method to the modular water chillers and air-conditioning water system energy-saving control scheme of variable frequency plus constant temperature difference is presented.Energy-saving control system using programmable logic controller（PLC） as the core controlling device is built.The running experiments show a remarkable energy-saving rate of 26.1%,with good energy efficiency and economy effects.