HomeNews Releases:Ethiopian Ambassador to Japan observed small hydroelectric power generation system STREAM® developed by JAG Seabell

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Ethiopian Ambassador to Japan observed small hydroelectric power generation system STREAM® developed by JAG Seabell

February 19, 2021

JAG Seabell Co., Ltd. (JAG Seabell), a group company of Japan Asia Group Limited (Japan Asia Group) aiming to create a green community, greeted His Excellency, Mr. Kassa T. Gebrehiwet, Ambassador Extraordinary and Plenipotentiary, Ambassador of the Federal Democratic Republic of Ethiopia in Japan, Embassy of the Federal Democratic Republic of Ethiopia to Japan (Ambassador Gebrehiwet) for a site visit to Hata Power Station at Azusagawa Land Improvement District in Nagano Prefecture (Hata Power Station) in Matsumoto City, Nagano Prefecture, explained and showed the system and exchanged views on the introduction of it to Ethiopia, on February 15th.

On the day, Ambassador Gebrehiwet and Mr. Solomon Ambaye Yimer, Second Secretary for Technology Transfer at the Embassy (Second Secretary Yimer) visited Hata Power Station and JAG Seabell’s person in charge presented a detailed explanation of the ultra-low head micro hydro turbine system STREAM® installed at the site. STREAM is an innovative small hydroelectric power generation system with a basic structure consisting of a turbine generator part and control panel and equipped with a vertical dual axes turbine developed by JAG Seabell. Even in environments with a head as low as 3m or less not covered by conventional turbine types, higher power energy can be generated by applying the energy of flowing water efficiently to the turbine. Also, since STREAM can be installed continuously at the drop structure*in a waterway, at Hata Power Station, by installing two STREAM per drop structure of an irrigation canal (Azusagawa right bank trunk waterway) and installing 49 kW low-voltage interconnection in 5 points, it is possible to generate approximately 250 kW as maximum output.

*In the case of a river, the facility installed across a waterway to stabilize the height and slope of the channel bed is called “groundsill”, and a groundsill with a head is called “drop structure”.In the case of irrigation canals, drop structures are positioned in irrigation canals to reduce the flow velocity to ensure a stable flow and to prevent the waterway wall surface from wearing.

Ambassador Gebrehiwet (right)
and Second Secretary Yimer (left)

Ambassador Gebrehiwet inquired about the durability of the equipment, maintenance and dust removal, and said, "I am very impressed by such a beautiful rural area surrounded by mountains. It was very informative to see the integrated system operating including irrigation canal, power generation at 5 points, and remote surveillance system."

After the site visit, the participants exchanged views on the operation and maintenance of the power station at the Azusagawa Land Improvement District in Nagano Prefecture, the owner of the Hata Power Station.Mr. Shintaro Kamijo, Chief Director of the Azusagawa Land Improvement District in Nagano Prefecture expressed gratitude for their visit, and said, "Japan has benefited from the agricultural products of Ethiopia, such as coffee beans and roses. We hope that our experience in power generation will contribute to agriculture in Ethiopia. STREAM has the advantage of being simple in structure and strong against failure. We believe that stable power generation can be expected by installing ‘suitable water turbines to suitable sites’ by considering the balance between strength of flow and design of equipment".

Second Secretary Yimer asked practical questions regarding initial investment and the number of years to recover the investment. Ambassador Gebrehiwet said, "In Ethiopia, 70-75% of the population is engaged in agriculture. Through technology, people can boost productivity and transform agriculture. Power plants are essential to make use of technology. Also, there are still many regions where it is difficult to connect power lines, so we need to consider mini-grids. I believe that hybrid use of STREAM and solar power generation is one of the effective solutions."

Shintaro Kamijo, Chief Director of the Azusagawa Land Improvement District in Nagano Prefecture (left)
and Ambassador Gebrehiwet (right)

We have conducted a field demonstration of the STREAM and installed it in 2015 as a method of constructing a mini-grid in an unelectrified area in Fentale, Oromia, Ethiopia, which is one of the African assistance programs implemented by UNIDO (United Nations Industrial Development Organization). (The system is still in operation.)

STREAM has already been highly evaluated as a technology that is widely accepted in Ethiopia, because it eliminates the need for a new bypass (waterways and pipes) and reduces construction costs by using existing waterways, and because it can be installed at the waterway with ultra-low head. We will continue to further promote cooperation with the concerned parties of Ethiopia with a view to technology transfer to Ethiopia.

Japan Asia Group will continue to be a company pursuing SDGs, with a mission of "Save the Earth, Make Communities Green".

STREAM installed in Ethiopia
(Date of installation: August 2015/Turbine output: rated 30 kW)
 <Inquiries about this matter>
  JAG Seabell Co., Ltd., Sales Technology Dept. (Person in charge: Yamamoto)
  E-mail:info@jagseabell.jp TEL:+81-3-6364-0954 URL:https://www.jagseabell.jp/