基于变工况运行的泵能耗指标计算方法

为了对变工况运行水泵的能耗进行合理的评价，根据水泵性能曲线和流量随时间变化规律，在三维空间建立了水泵运行状态体系。通过功率对时间进行积分求得水泵在某时段的电能，通过二重积分计算水泵在该时段的提水量与扬程之积，进而提出了一种变工况条件下水泵能耗指标的计算模型，解决了现有水泵能耗指标计算方法的局限性。以某泵站水泵运行数据为实例，运用新的能耗指标计算方法进行了计算，证明该计算方法能够对变工况下运行的水泵能耗进行合理的计算。

Method to calculate the energy consumption index of pump operation under variable working conditions

In order to evaluate the energy consumption of pump operation under variable working conditions rationally, state graph of pump operation based on pump characteristic curve and flow rate variety curve has been established in three dimensions. A model to calculate the energy consumption index of pump operation under variable working conditions has been established, which can solve the problem of existent model. In the model, energy consumption of pump operation in a time-interval was calculate by a definite integral, product of water supply amount and head was calculate by a double integral. The energy consumption index of pump operation of a pump station was calculate by the model. The results showed that it can calculate the energy consumption of pump operation under variable working conditions rationally.