Possible applications

Among the three types of generators, the Pelton type for high head generates power by the water pressure derived from height difference between the water intake and the turbine, and flow rate. It takes water from a high place in the river, supplies water to the Pelton turbine generator installed at a low position with a pressure pipe over a long distance.

In addition, the screw type and undershot type for low head are installed immediately to an existing weir (or additional head work might be required) with a width of 2 to 5 meter and a head of 1 to 3 meter, and utilize water falling from the weir to drive the water wheel to generate electricity.

The choice for low head between the screw type or the undershot type is determined by the locational conditions to be considered for installation and the effect on the water.

The following conditions are basic specifications.
・ Pelton type small hydropower generator has 30 meters head or more, flow rate of 5 L/sec or more
・ Screw type small hydropower generator has one meter head or more, flow rate of 200 L/sec or more
・ Undershot wheel type small hydropower generator has one meter head or more, flow rate of 800 L/sec or more

Competitive advantage

In general, in developing countries, there are many small and medium-sized irrigation canals in familiar places, so there are many places where such small and inexpensive generators are highly recommended to install.

The initial cost and operation cost at the site are relatively inexpensive compared to conventional products. The initial cost per kW is 1.7 million yen which is almost 70% of the initial cost of the conventional product.

The estimated initial and operation cost are as follows;
・ Water turbine generator 5 kW type set costs 8.5 million JPY

The cost of this turbine generator depends on the power generation capacity and condition of installation.
・ Operating cost is about 100,000yen/year for wear and tear parts for maintenance.
・ The wear and tear parts at the initial stage only will be delivered when the equipment is installed.

Performance

                                                    Table 1 Introduction of small hydropower generation

Features ——-Highly reliable configuration and generation efficiency
Our technologies include low head handling, cost savings, and a height adjustment mechanism for undershot hydropower generators.
Please refer to the attached brochures in detail.
Horizontal axis Pelton type hydropower generator
Vertical axis Pelton type hydropower generator
Screw type hydropower generator
Undershot type hydropower generator

Technical maturity / Past record of introduction

The company has so far installed 23 small hydropower units of the three types. In 2020, the company will install one unit of undershot type in Japan.
                                               Table 2 Installed generators of domestic and international

Information on patent related to this technology

Screw type
Patent No. 6020988
The company are currently applying for a patent on the undershot water type.

International operation

Modality of business transaction

Partnership
In addition, after we conclude a partner agreement with a local company which has a certain level of technology and skills that can deal with the actual local circumstances.
We conclude a partner agreement with another company, including on-site investigation, feasibility study, local installation work, operation confirmation and operation.
A local company will be in charge of business under the guidance of engineers dispatched from us. 

Export of product
Basically, we manufacture in Japan and export our products of standard hydroelectric generators, and conduct on-site preliminary surveys, technical guidance on installation and operation by engineers dispatched from our company.

Schematic illustration of the technology

Message to customers
We are pleased to provide you with a system that generates electricity by utilizing water power in your country.
In particular, we are sure that our three types of small hydropower equipment will definitely help you.
We hope that you can select the method that suits your location from these three methods.

Our product concepts are
①Small-scale decentralized type that can be easily introduced.
②High equipment reliability and high efficiency of power generation
③Low initial investment: 1.5-2 million Japanese yen/kW

We look forward to your order. If you have any questions, or wish for a consultation, please do not hesitate to contact us by telephone / email of the contact information on the previous page.