小型灌排泵站系统能耗与效率计算

Calculation of energy loss and efficiency of small pumping station system

为了解小型泵站及其相关部分的能量特性,从能耗角度定义了小型泵站系统.按照能量在泵站系统中的传递过程,给出泵站系统典型环节能耗和系统效率的计算方法.以某排涝泵站系统为例,计算了系统各部分能耗,分析了各部分的能耗比和效率.结果表明:泵站系统中泵机组以外部分的能耗较大,不能忽视,泵站系统各部分能耗和效率与系统形式、组成及工况有关.算例泵站系统中,水泵、出水管、输水渠(涵)、电动机和进水池能耗较大,分别占系统总能耗的35.35%,21.79%,18.63%,13.66%和6.02%,其中出水管、输水涵洞和拦污有较大节能潜力.

In order to reveal the energy characteristics of each component for a small pumping station, the concept of the small pumping station system was defined from energy consumption. In accordance with the process of energy transfer in a small pumping station system, the computational methods of energy losses for typical links of the system and system efficiency were provided. Taking a drainage pumping station system as an example, the energy losses of the various components of the system were calculated, and the energy loss ratio and efficiency of each component were ana lyzed. The results show that, for a small pumping station system, the energy losses of the components apart from pump units occupy a large proportion and can＇t be neglected. The energy loss of each component of the system relates to the layout, composition and operating mode of the system closely. In the example, the energy losses of the pump, the outlet pipe, the conveyance canal （culvert）, the motor and the inlet sump, each occupies a large proportion, and the percentages in total energy loss of the system are 35.35%, 21.79%, 18.63%, 13.66% and 6.02%, respectively. The outlet pipe, the culvert and the trash rack have large energy saving potential.