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普遍认为,把泵反转当水轮机用投资费用可降到常规水轮机的一半。容量范围在5到500千瓦的机组期求2年或2年内收回投资,这一点看来鼓励这种代用。也常听说,设计得很好的一台离心泵或立式泵当一台水轮机用,性能差不多。泵当水轮机用,交货期短,能适应的出力范围大,造价也低于常规水轮机。虽然上述情况是确实的,若理解偏了也会造成错觉。据作者的认识和经验,水泵只在某些特定场合适宜当水轮机用,比如:前期投资比效率及宽的运行范围更为重要的场合;流量近乎常值的地方;泵当水轮机用的试验资料可以获得的情况下。如果不是上述
It is generally agreed that the cost of inverting a pump when using the turbine can be reduced to half that of a conventional turbine. Encouraging this type of substitution, with a capacity ranging from 5 to 500 kilowatts for a period of 2 years or 2 years to recover the investment. It is also often heard that well-designed centrifugal pumps or vertical pumps work as a turbine with similar performance. Pump when the turbine, delivery time is short, to adapt to a large range of output, the cost is lower than the conventional turbine. Although the above is true, misleading understanding can lead to illusions. According to the author’s knowledge and experience, water pumps are suitable for use on turbines only in certain occasions, such as: the upfront investment is more important than the efficiency and the wide operating range; the flow rate is almost constant; the test data Can be obtained under the circumstances. If not above