Abstract
In hydropower with high heads, the Pelton turbine is the most used impulse turbine due to its high efficiency. However, the efficiency of the power generation from the Pelton turbines depends significantly on the jet quality. One of the major reasons for poor jet quality is a misalignment of the needle and nozzle of the Pelton injector, as it results in deviation of the jet from its path. With an increase in the jet deviation, the quality of the jet further reduces leading to more power generation loss and vibration. In addition to the extent of needle eccentricity, the jet deviation also depends on the nozzle opening. Here, various needle eccentricities (0, 2, 5, and 8%) and nozzle openings (25, 40, 50, 65, and 90%) are considered to study their effects on the jet deviation, i.e., the jet quality numerically. For 40% nozzle opening, as the needle eccentricity increases from 2 to 8%, the injector efficiency is found to reduce by 13.56% and the deviation of jet center, measured at a distance of 2.32 times the nozzle diameter from the nozzle exit, is found to increase three times. Further, for 5% needle eccentricity, as the nozzle opening reduces from 50 to 25%, the deviation of the jet center increases two times. This study demonstrates the need for checking Pelton needle eccentricity, especially after maintenance.
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References
Shafiei S, Salim RA (2014) Non-renewable and renewable energy consumption and CO2 emissions in OECD countries: a comparative analysis. Energy Policy 66:547–556
Sharma NK, Tiwari PK, Sood YR (2012) Solar energy in India: strategies, policies, perspectives and future potential. Renew Sustain Energy Rev 16(1):933–941
Stamatelos FG, Anagnostopoulos JS, Papantonis DE (2011) Performance measurements on a Pelton turbine model. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 225(3):351–362
Jung IH, Kim YS, Shin DH, Chung JT, Shin Y (2019) Influence of spear needle eccentricity on jet quality in micro Pelton turbine for power generation. Energy 175:58–65
Staubli T, Abgottspon A, Weibel P, Bissel C, Parkinson E, Leduc J, Leboeuf F (2009) Jet quality and Pelton efficiency. In: Proceeding of Hydro-2009, Lyon, France
Jinwei H, Xinfeng G, Dongdong C, Jing Z, Bing X, Fei G, Yuan Z (2022) Research on the effect of needle eccentricity on the jet flow characteristics. Frontiers in Energy Research 10:882747
Bajracharya TR, Timilsina AB, Sapkota A, Magar TR, Shrestha S, Sapkota T, Shrestha N (2021) Effect of spear needle eccentricity on the Pelton turbine jet. In: Proceedings of 9th IOE graduate conference 9, pp 302–309
Benzon D, Zidonis A, Panagiotopoulos A, Aggidis GA, Anagnostopoulos JS, Papantonis DE (2015) Numerical investigation of the spear valve configuration on the performance of Pelton and Turgo turbine injectors and runners. Journal of Fluids Engineering 137(11)
Egusquiza M, Egusquiza E, Valentin D, Valero C, Presas A (2017) Failure investigation of a Pelton turbine runner. Eng Fail Anal 81:234–244
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Shrivastava, N., Rai, A.K. (2024). Effects of Pelton Turbine Needle Eccentricity on Jet Quality. In: Hodge, BM., Prajapati, S.K. (eds) Proceedings from the International Conference on Hydro and Renewable Energy . ICHRE 2022. Lecture Notes in Civil Engineering, vol 391. Springer, Singapore. https://doi.org/10.1007/978-981-99-6616-5_51
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DOI: https://doi.org/10.1007/978-981-99-6616-5_51
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