Abstract
Recently, environmentally friendly nano-hydraulic turbine has much attentions, it is because that this turbine can be made at lower cost than traditional large plants, and be utilized extreme low head hydro energy effectively for local production and local consumption of electricity. In addition, this turbine can be placed without any civil engineering works, that is, environmental burdens are negligible. The authors have been focused on this type turbine, and developed several types to match the flow types, effective head and flow rate. This paper describes the development and demonstration status of these turbines, Savonius runner, waterfall type runner, undershot runner and jet turbine.
