열역학법 효율시험을 활용한 50MW급 수력플랜트 현대화 평가 |
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학술지명 대한기계학회 2020년 학술대회
저자 배강호,조용,김용열
발표일 2020-12-17
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This study modernizes the runner of a Hapcheon hydropower plant installed with a vertical Francis turbine with a rated head of 95 m, measures and compares the field efficiency before and after the modernization, and verifies how much influence the runner has on the efficiency of the turbine. the same field test was performed using the thermodynamic method, which is a test applicable to turbines exceeding 100 m head according to IEC 60041. The turbine of the old runner was measured at 93.21% as the highest efficiency point under the condition of a head 113.0 m and an output of 51.6 MW. The turbine of the new runner was measured at a highest efficiency of 94.20% despite the worse condition of the head 117.62 m. the efficiency improved by about 0.99%p, which was effective improvement by reducing the loss by about 15% from 6.79% to 5.8%. In both tests, the absolute uncertainty about the turbine efficiency was measured at 0.73% and 0.66%, resulting in a reliable test. |