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Hydraulic design and operation of variable-speed pumps as the water–energy saving strategies in pressurized irrigation systems
Clean Technologies and Environmental Policy ( IF 4.3 ) Pub Date : 2021-02-16 , DOI: 10.1007/s10098-021-02043-w
Morteza Delfan Azari , Atefeh Parvaresh Rizi , Afshin Ashrafzadeh

Low efficiencies of irrigation pumping stations usually stem from their improper designing, operation, and maintenance of such systems. In the present study, the water and energy losses and the pressure variations of a pressurized irrigation system were investigated through analysing the characteristic curves of the pumps and assessing the discharge and pressure heads needed by the system during the irrigation season (i.e. the system demand curves). Variable-speed pumps can be adjusted to the system demand, making them more efficient than constant-speed pumps while bringing down water and energy consumption. Given this assumption, the suitability of variable-speed pumps to save water and energy in a 100 hectares apple and peach orchard, located in Isfahan Province, central Iran, was investigated. The pressure head, the pump efficiency, and the water and energy losses of the orchard’s irrigation system designed based on variable-speed pumps were calculated and compared with those of common constant-speed systems. The results showed that using variable-speed technology in designing pumping stations not only increases the efficiency and reduces unnecessary pressures but also can result in optimal water use and, depending on operational condition, 44–54% reduction in energy consumption can be achieved, which is significant in national scale.

Graphic abstract



中文翻译:

加压泵系统中节水策略的变速泵的液压设计和操作

灌溉泵站的低效率通常是由于此类系统的设计,操作和维护不当造成的。在本研究中,通过分析泵的特性曲线并评估灌溉季节期间系统所需的排放和压头,研究了加压灌溉系统的水和能量损失以及压力变化。 )。变速泵可以根据系统需求进行调整,从而在降低水和能源消耗的同时,使其比恒速泵更高效。在此假设的基础上,对位于伊朗中部伊斯法罕省的100公顷苹果和桃园中变速泵是否适合节水和节能进行了研究。压头,泵效率,计算了基于变速泵设计的果园灌溉系统的水和能量损失,并将其与常见的恒速系统进行了比较。结果表明,在变速站设计中使用变速技术不仅可以提高效率并减少不必要的压力,而且可以优化用水量,并且根据运行条件的不同,可以减少44-54%的能耗,在全国范围内具有重要意义。

图形摘要

更新日期:2021-02-16
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