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当水位以地面水作水源的水厂,如水位随季节变化较大时,对不设调节设施的水厂取水泵来说,节能潜力甚大。目前变速电机规格较少,功率30千瓦的最高转速只有1410转/分,在工程设计中往往感到转速和功率偏小,影响水泵的合理选择。另外变速电机价格也较贵,约为普通电机的3～5倍,不过一般投产一年后节约的电费即可得到补偿。一、离心水泵Q-H特性曲线通用方程现根据额定转速n下水泵Q-H特性曲线
When a water plant whose surface water level is used as a source of water, such as when the water level varies greatly with the season, there is a great potential for energy saving for pumping water plants without regulating facilities. At present, there are few specifications for variable speed motors, and the maximum speed of power of 30 kilowatts is only 1410 rpm. In engineering design, it often feels that the speed and power are too small, affecting the reasonable choice of pumps. In addition, the variable speed motor is also more expensive, which is about 3 to 5 times that of ordinary motors. However, the electricity costs saved after one year of normal operation can be compensated. First, the general equation of the Q-H characteristic curve of the centrifugal pump is based on the Q-H characteristic curve of the pump at rated speed n