Abstract
In this study, we develop a theoretical formula for determining the optimum number of buckets required for achieving the maximum possible efficiency of a Pelton turbine. In addition, by deriving an improved formula for determining the speed ratio limit at which a missing jet begins, we obtain a valid condition for the selection of the number of buckets. To validate these formulas, we conduct a performance test on a pico-scale Pelton turbine by using runners with different numbers of buckets. The results of the performance test validate both the formula for bucket selection, by confirming that the calculated number of buckets maximizes the efficiency of the Pelton turbine, and the formula for the speed ratio limit. We conduct an additional performance test on a micro-scale Pelton turbine, the results of which also verify the formula for selecting the number of buckets. This study should help researchers determine the appropriate number of buckets when designing a highly efficient Pelton turbine.
| Original language | English |
|---|---|
| Pages (from-to) | 695-705 |
| Number of pages | 11 |
| Journal | Journal of Hydraulic Research |
| Volume | 55 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2017 Sep 3 |
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Keywords
- Angle of attack
- hydraulic machinery design
- hydraulics of renewable energy systems
- laboratory studies
- number of buckets
- Pelton turbine
- speed ratio
ASJC Scopus subject areas
- Civil and Structural Engineering
- Water Science and Technology
Cite this
Theoretical method of selecting number of buckets for the design and verification of a Pelton turbine. / Kim, Jeong Won; Jo, In Chan; Park, Joo Hoon; Shin, Youhwan; Chung, Jin Taek.
In: Journal of Hydraulic Research, Vol. 55, No. 5, 03.09.2017, p. 695-705.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Theoretical method of selecting number of buckets for the design and verification of a Pelton turbine
AU - Kim, Jeong Won
AU - Jo, In Chan
AU - Park, Joo Hoon
AU - Shin, Youhwan
AU - Chung, Jin Taek
PY - 2017/9/3
Y1 - 2017/9/3
N2 - In this study, we develop a theoretical formula for determining the optimum number of buckets required for achieving the maximum possible efficiency of a Pelton turbine. In addition, by deriving an improved formula for determining the speed ratio limit at which a missing jet begins, we obtain a valid condition for the selection of the number of buckets. To validate these formulas, we conduct a performance test on a pico-scale Pelton turbine by using runners with different numbers of buckets. The results of the performance test validate both the formula for bucket selection, by confirming that the calculated number of buckets maximizes the efficiency of the Pelton turbine, and the formula for the speed ratio limit. We conduct an additional performance test on a micro-scale Pelton turbine, the results of which also verify the formula for selecting the number of buckets. This study should help researchers determine the appropriate number of buckets when designing a highly efficient Pelton turbine.
AB - In this study, we develop a theoretical formula for determining the optimum number of buckets required for achieving the maximum possible efficiency of a Pelton turbine. In addition, by deriving an improved formula for determining the speed ratio limit at which a missing jet begins, we obtain a valid condition for the selection of the number of buckets. To validate these formulas, we conduct a performance test on a pico-scale Pelton turbine by using runners with different numbers of buckets. The results of the performance test validate both the formula for bucket selection, by confirming that the calculated number of buckets maximizes the efficiency of the Pelton turbine, and the formula for the speed ratio limit. We conduct an additional performance test on a micro-scale Pelton turbine, the results of which also verify the formula for selecting the number of buckets. This study should help researchers determine the appropriate number of buckets when designing a highly efficient Pelton turbine.
KW - Angle of attack
KW - hydraulic machinery design
KW - hydraulics of renewable energy systems
KW - laboratory studies
KW - number of buckets
KW - Pelton turbine
KW - speed ratio
UR - http://www.scopus.com/inward/record.url?scp=85028817700&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028817700&partnerID=8YFLogxK
U2 - 10.1080/00221686.2017.1354933
DO - 10.1080/00221686.2017.1354933
M3 - Article
VL - 55
SP - 695
EP - 705
JO - Journal of Hydraulic Research/De Recherches Hydrauliques
JF - Journal of Hydraulic Research/De Recherches Hydrauliques
SN - 0022-1686
IS - 5
ER -