The Small Hydro projects demonstrate the range of experience that Nautilus personnel have gained over the last 30 years.
These photos show the runner removal and repair of an 8 MW “S” type Full Kaplan designed and built by FUGI Electric. This 15 ft diameter turbine operates on 38 ft of head on the Merrimac River.
These pictures show the rebuilding and installation of a S Morgan Smith 6 bladed fixed pitch propellor. The pressure case was fabricated and assembled using all the cast components from Smith. These parts were re-riveted to the new case. The turbine in the pressure case. the governor and generator were lifted by crane and installed in the existing powerhouse to add capacity and dependability to the site.
These Photos of Fiske Hydro in New Hampshire are an overview of some of the work required to get the site back on line and build a Fish Elevator required by the US Fish and Wildlife Service. A 165 KVA Niagra semi-kaplan turbine was rebuilt and installed in an open flume. The site has 18 feet of head an a FERC Licensed potential of 810 KW. Expected annual production with 4 units installed is 480 mwh/yr. The Fish elevator was designed and built in house over 3 warm seasons. This was a big job for a small company.
Fiske Hydro was required by the US Fish and Wildlife Service to design and build a fish lift to facilitate the migration of Shad up the Ashuelot River in New Hampshire. There was a downstream fish passage and an eel ladder already in place. The construction of the Fish Lift was accomplished with in house labor and too three warm seasons to complete. The lift was successfully operated in the spring of 2012 and inspected by USFWS employees.
This 165 KVA Niagra semi-kaplan turbine was purchased used and rebuilt for installation in an open flume. This is a submerged design with self contained gearbox and induction generator.
We acted as consultants on the design,construction and installation of a 30 inch - 100kw semi-kaplan turbine located on an irrigation canal at Tomatlan, Mexico. The Instituto Investigationes Electricas was supported by U.S. aide in this interesting and important project. In many areas of the world where canal irrigation is used in agriculture the are areas of these systems that require a change in elevation from one canal to another. The energy wasted when the water is dropped to a lower canal is destructive and must be dissipated by the use of long chute with a stilling pond at the bottom. The installation of a turbine in parallel with the existing chute removes the dangerous energy from the water and produces energy for local distribution. All the civil works are generally in place and only an intake and small powerhouse need to be added. The economics of this innovative form of hydro are often very good.
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