WaterWeco(R) generates electricity effectively in environments characterized by low-head and high-velocity flow.
Open-type micro hydropower generation system WaterWeco(R)
The flow rate of water channels and sluices should be more than 2 m³ per second (CMS), and an effective drop of about 1.5 meters is a guideline for selecting suitable project sites.
Since around 2009, we have conducted social experiments on standalone micro-hydropower generation in collaboration with local governments and consulting companies, optimizing the Takao Eris Power Station in Niimi City, Okayama Prefecture, which has been in operation since March 2016. We started coordinated operations in Minami-Uonuma City, Niigata Prefecture, from December 2024. The turbine was developed in collaboration with Nagasaki University and Nishinihon Fluid Technology Co., Ltd.
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basic information
Among small hydropower generation, micro hydropower generation can utilize either relatively high head or low head, but WaterWeco (R) utilizes the low head method. When using low head, considerations must be made for initial investment, power generation efficiency, maintenance management, as well as biodiversity and environmental impact. It is possible to effectively utilize existing headworks that have already been established.
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Applications/Examples of results
There are examples of hydropower plant discharge water being used in agricultural water channels. By arranging units in drop structures such as sluice gates, it is possible to enhance cost performance.
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Company information
Output corresponds to approximately 5 to 20 kW per unit. Output can be enhanced by installing multiple units. Brief history: From 2009, collaborated with municipalities such as Okayama City, Tsuyama City in Okayama Prefecture, and Miyoshi City in Hiroshima Prefecture, as well as consulting companies for feasibility studies (demonstration experiments), owning power generation and self-consumption facilities, conducting long-term operational tests and improvements in power generation efficiency, with support from organizations such as the Okayama Prefectural Industrial Promotion Foundation, and collaborating with Nagasaki University Graduate School of Engineering and Nishinihon Fluid Technology Co., Ltd., a fluid research institution, from 2016 for joint research, CFD fluid analysis, model testing, optimization, product development, and completion of actual machine installation operations, with domestic patent registration in October 2020 (along with over 60 overseas patent registrations, WaterWeco(R) trademark, and design registration for turbine blade shapes). ・Effective installation is possible in suitable locations that were previously deemed unfeasible due to overflow risks (low drop height drop structures). ・Labor-saving：Easy measures against dust and heavy snowfall (no dust removal equipment required): Significant reduction in maintenance costs (initial costs). ・Automatic layout control mechanism that adjusts to flow rate fluctuations：Stable power generation efficiency during the period. ・ Consideration for biodiversity：Fish passages can be secured even when installed in rivers where fish migrate. ・ Awards and technology registration history：Received various awards including the Eco-Products Award and the Chairman's Award from the Invention Association; registered with UNIDO STePP.
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