Characteristics Analysis of Francis Turbine Performance from Experiment Model Test by Different Specific Speeds |
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학술지명 6th AFORE Annual Seminar, China, 2016
저자 송두호,최종웅,신강욱,차상훈,배상식
발표일 2016-11-10
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Hydraulic turbine efficiency test in small hydro power system are the most important as a comprehensive measure of device performance. Hydraulic turbine develop have to go through trial and error and It takes too much cost and time consumption if the tests have been by prototype hydraulic turbine. Instead of prototype, we can validate and develop hydraulic turbine efficiency through the model turbine laboratory test. The main purpose of this study is to analysis performance characteristic of newly designed francis hydraulic turbine through the model test. To validate the hydraulic turbine performance, we made three model for the hydraulic turbines by different specific speeds (120, 200, 300 m-kW). Specific speed means rotation-speed of turbine when a turbine has unit flow and makes unit power. It can be a measure of the turbine shape and it indicates performance of the turbine. In this study, the tests was carried out the model test by the international standard of Hydraulic turbines model acceptance test; IEC 60193. The facility uses pump and pressure tank to make head and flow, measure the discharge from the electromagnetic flowmeter, and measure the torque from the dynamometer. The facility has maximum test head of 40m, maximum test discharge of 1.2cms, maximum hydraulic dynamometer speed of 2500rpm and uncertainty of the efficiency of measurement is calculated by IEC 609193. The tests are performed based on IEC 60193 and with variation of guide vane open rate, rotational speed and load. In the conclusion, the maximum efficiency of N_s 200 model is appeared in the different specific speeds, and we were plotted the hill-chart of a N11-Q11-efficiency with the experiment data. |