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논문 기본 정보

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(Kathmandu University) (Kathmandu University) (Kathmandu University)
저널정보
한국신재생에너지학회 AFORE AFORE 2012
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    초록·키워드

    The operation of hydraulic turbines, which converts the huge amount of hydraulic forces into mechanical energy, has always been a challenge. The turbines are also exposed to start-stop cycles. These hydraulic forces and start-stop cycles induces cyclic stress in the runner. The operating condition is worse in situations when rivers are loaded with higher concentration of sediment particles which erodes the turbine material. The uneven wear of runner becomes critical when it causes an increase in stress concentration in runner structure and initiates the surface crack. When the cyclic stresses are beyond the material strength, it initiates crack propagation, and eventually failure occurs. Khimti Hydropower in Nepal has potential of 60 MW produced from 5 units of Pelton turbine. The concentration of sediment particles in Khimti river was recorded as high as 8536 PPM and the quartz content was 70% by volume. Due to the higher concentration of quartz particles and higher erosion rate, the runner requires frequent inspection and maintenance. During the ins ... 전체 초록 보기

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      UCI(KEPA) : I410-ECN-0101-2016-530-001141486