Laserfiche WebLink
The intake channel will be adjacent to the existing canal at the upstream end of the <br /> project. It will be approximately 200 feet in length. Combined in the intake channel is <br /> the overflow structure which will consist of five 10' wide automatic trip gates(ATG)that <br /> will function as a redundant safe-guard in the event the plant shuts down for any reason <br /> and the bypass gate is not able to deliver the required flows. The diversion will consist <br /> of a 12' wide by 15.75' high roller gate that will be set in the existing concrete canal too <br /> divert water to the intake channel. This gate will also be used as a bypass. <br /> Intake/Powerhouse Structure <br /> The intake portion of this steel reinforced concrete structure will be approximately 70' <br /> long by 23' wide by 50' high. This will convey water from the intake channel to the <br /> scroll case in the powerhouse. A steel bar trash screen will be installed in the structure to <br /> remove debris. <br /> The powerhouse portion of this steel reinforced concrete structure will be approximately <br /> 50' wide by 36' long with a metal roof. The foundation will embed the turbine housing, <br /> steel draft tube, and tailrace stop gates. The tailrace stop gates will be used to dewater <br /> the unit during maintenance. The building will house the generator and <br /> mechanical/electrical auxiliaries. The building will be equipped with a roof access hatch <br /> to facilitate future maintenance. The tailrace will be approximately 200' in length. <br /> Turbine <br /> The turbine will be a vertical double regulated Kaplan and will be of American/European <br /> design built in China, as will be the generator. The turbine manufacturer is represented <br /> by Far East Engineering of Boise, Idaho. These Kaplan units have been installed in the <br /> United States by the Twin Falls Canal Company near Hansen, Idaho, the Boise Project <br /> Board of Control in Ada County, Idaho and in the Uncompahgre Project at Drops 1, 3 <br /> and 4 constructed between 2012-2015. <br /> Generator <br /> The generator will be a vertical synchronous Kaplan with brushless exciter and a rated <br /> capacity of 2,200 kW. It will also be of American/European design and built in China. <br /> Mechanical Equipment <br /> The turbine wicket gates will operate hydraulically. The hydraulic power unit will be of <br /> American make —with accumulators for black shutdown. The governor will be digital. <br /> The roller gates will be fitted with DC electric power by motor to drive the pinion gears. <br /> Level sensors(differential pressure)in the forebay will be utilized to provide information <br /> to the powerhouse PLC to maintain constant head in the upstream forebay and thus in the <br /> feeder canal. <br /> Powerhouse Electrical Controls <br /> 11 <br />