Mission to Zero-emission Micro Hydro System
SEIKO Service and Engineering Ltd Nakayama Ironworks Co. Ltd

Product Features
“Small-hydropower" is a technology that uses the flow of water from rivers and agricultural water to generate electricity. Although there is no strict limitation to the volume of electricity produced, any such system that could generate less than 1000 kW is called a small-hydropower or simply micro-hydro. Whereas large hydropower projects require several years of preparation time, small hydropower projects can be up and running in a very short time. Around the World, there are many small rivers, agricultural water and locations with a great potential for electricity generation and the small micro hydropower has been designed for that purpose. One package! Previously separated components are now offered in one package. This eliminates the need for buildings and their indoor plumbing and wiring works, shortening the construction time and improving safety.
Different ways of use
As a stand abne power suppl
This unit is a small power station that can produce electricity and, without using the electric power company's supply lines, send it t o homes in the surrounding area*'. This is particularly effective in areas
As a power generation business
This unit can also be used to produce and sell electricity to the electric power company 1 Effective head : 10~100m Flow rate : 0.02~0.6m³/sec. Power generation 19.9, 30, 49.9kW Cost savings (I as no building is required )) Compact and easy to install Quality assurance through completion of the product. Reliable and Stable Power Generation, Optional: Remotely Monitoring Device Reliable long life design. Nakayama's unique packaging for noise reduction. Maintaining water discharge even in case of failure. Applicable to small rivers, springs, irrigation channels, etc.!
Examples of installation
2

Example : Control Panel
• Built-in reverse converter for compact storage • Easy to operate • High quality and reliability
Inverter
manufactured bay Yasukawa Electric • Interconnecting inverter with built-in independent operation detection function (Detects and isolates irregularity for grid connection). • Rotation speed control driver suitable for water flow adjustment  (according to grid requirements) .
 Example of single line distribution diagram

The total amount of CO 2 emissions reduction, electricity generated, and electricity sales revenue can be checked on a dedicated page (online).
Flow Control
• Smooth start/stop operation • Water flow continuity ensured, even in case of breakdown or power failure. • Maximum output control according to the water volume. • Handling of additional functions to support variable water level and volume. Available options for various water use: • Control of constant water level in the intake tank. • Control of constant water discharge. • Control of Pressure reduction.
*2:  For an output of 49.9kW, a 12-ft container can be used if a bypass channel is prepared outside. We will consider the design and waterway conditions through consultation. ¥3: Reference values.
Example of Selection Flow rate : 0.11m³³/sec. Effective head : 80m Power generation output : 66kW Water turbine type Cross flow If your application is outside this range, please contact us.
Output and grid connection - installation of chief engineer
Low voltage interconnection (200V, 3φ) is possible for grid interconnection contracts of less than 50kW.
0, emission reduction
CO 2 emission reduction= Estimate[kWh] × 0.36～0.505*1[kg CO 2 /year]
Society 5.0 is the fifth new society in the history of human social development. In the Fifth Science and Technology Basic Plan of the Cabinet Office, it is defined as "a human-centered society that achieves both economic development and solutions to social problems through a system that highly integrates cyberspace (virtual space) and physical space (real space)". We believe that small-scale hydroelectric power generation can be one approach to achieving the 17 Sustainable Development Goals set by the United Nations, as well as a key element of the future society that Japan should aim for.
omoting the SDGs throush Small Hydropower
Goal 7 Ensure access to affordable, reliable, sustainable and modern energy for all. Goal 11 Make cities and human settle- ments inclusive, safe, resilient and sustainable. Goal 13 Take urgent action to combat climate change and its impacts. Goal 14 Conserve and sustainably use the oceans, seas and marine resources for sustainable development.
On-site installation process
Secure the four corners of the container with anchor bolts. The installation is now Connect the container piping to the complete. water pressure pipe at the site. Note: Be sure to check the size of the pipe and the size of the flange (5k, 10k, 16k, etc.).
What the customer needs to do
1. Construction of water intake facilities; piping, container foundation and installation work. 2. Power wiring (from the power reception point to the container inlet) and installation of meters for transactions (power purchase/sale).
Please take measures to prevent overflow of water at t he upstream side. Also, prepare a desilting tank, forebay tank and screen for stones, small pieces, gravel, and granular sand upstream. Contact information Nakayama Ironworks Co. Ltd. 2246-1 Amagu, Asahimachi, Takeo City., Saga Pref. 843-0001 JAPAN TEL: +81 954 22 4171 Website: http://www.ncjpn.com