灌溉水是水力发电的一种潜在能源,但迄今仍未被大量利用。目前,美国许多灌区都在灌渠内安装了水轮机,以便在灌溉季节或供水季节内发电。设计这种水轮机的主要难题是,灌溉供水提供的只是低水头,因此要有效地利用这种水力资源,就必须设计出特殊的水轮机。目前阿克塞尔·约翰逊工程公司已制造并安装了一些利用灌溉水和供水水源发电的水轮机。这些水轮机是转桨式或半转桨式水轮机。转桨式水轮机在流量变幅较大时,仍然能保持高效运行。这是通过改变桨叶和导叶角度,从而改变过水 Irrigation water is a potential source of hydropower but has so far not been fully exploited. At present, many irrigation districts in the United States have installed turbines in irrigation canals to generate electricity during the irrigation season or the water supply season. The main challenge in designing such a turbine is that the irrigation water supply provides only a low head, so that to make effective use of this hydraulic resource, special turbines must be designed. Axel Johnson Engineering currently manufactures and installs turbines that generate electricity using irrigation and water supplies. These turbines are paddle or semi-paddle-type turbines. Pitch paddle turbine in the larger flow rate, still able to maintain efficient operation. This is done by changing the blade and guide vane angles to change the water level