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在企业能量平衡工作中,均要测算水泵的电能利用率。测算水泵电能利用率的关键是确定(?)扬程。目前,有关的资料和著作,如机械工业部第九设计研究院的《实用企业能量平衡讲义》,机械工业部节约办公室的《一机企业能量平衡计算方法》等都指出,水泵的扬程为:
In the enterprise energy balance work, the power utilization rate of the water pump must be measured. The key to measuring the energy efficiency of a pump is to determine the head of the pump. At present, the relevant materials and works, such as “The Practical Enterprise Energy Balance Handout” of the Ninth Design and Research Institute of the Ministry of Machinery Industry, and “The Energy Balance Calculation Method of a One-machine Company” that the Ministry of Machinery Industry conserves, all point out that the head of the pump is: