Abstract: According to the analytic hierarchy process (AHP) and referring to the national standard, the evaluation index of the energy consumption of the centrifugal pump system and the evaluation system of the centrifugal pump system were established. By using the theory of fuzzy mathematics, a complete evaluation method was formed.Using Matlab to solve the matrix of the largest features to determine the weight of each factor.The threshold value of each factor was obtained by statistical method, and the fuzzy matrix of each factor was obtained.The evaluation of energy consumption of a centrifugal pump in a factory was carried out. The evaluation results showed that the pump efficiency was the main factor affecting the centrifugal pump system;the energy consumption grade of the centrifugal pump system was 2, and the overall operation of the system was reasonable; in the single factor evaluation, the energy efficiency level of transmission efficiency was 4, which indicated that the drive mechanism was not running properly and needed to be handled.Therefore, this method had an important guiding significance for the energysaving transformation of the centrifugal pump system.

Key words: Fuzzy mathematics, Centrifugal pump system, Energy consumption evaluation, Membership function, Evaluation matrix

摘要： 根据层次分析法,并参考国家标准,建立了离心泵系统能耗评价指标和评价标语集,基于模糊数学理论,形成了一套完整的评价方法。使用Matlab软件求解矩阵的最大特征,确定了各因素之间的权重,通过统计方法得到每个因素的阈值,并代入对应的隶属函数,求出了每个因素的模糊矩阵。对每个单一因素进行评价,并给出了建议。对某厂随机抽取的一台离心泵进行了能耗评价。结果表明,离心泵效率是影响离心泵系统的主要因素,离心泵系统的能耗等级为2级,系统总体运行较为合理;在单因素评价中,传动效率能耗等级为4级,传动机构运行不合理,需对此部件进行处理。该方法对离心泵系统的节能改造具有重要的指导意义。

关键词: 模糊数学, 离心泵系统, 能耗评价, 隶属函数, 评价矩阵