Jets & Buckets for Pelton Wheels Means to Complete the Second Law of Power Retrieval……. P M V Subbarao Professor Mechanical Engineering Department.

Slides:

Advertisements

Similar presentations

Velocity Triangle for Turbo-machinery

Advertisements

Pelton Wheel Turbine Generator Drew Ramsey, Ashley Munguia, Justin Johnstone, Chris Yonts Undergraduate – Texas A&M University at Galveston Senior Advisor:

Matching of Buckets & Wheel Optimal number of Muscles for this Artificial Beat……. P M V Subbarao Professor Mechanical Engineering Department.

Design of Pelton turbines

Design Analysis of Parts of Pelton Wheel Turbine

Pelton Turbine. The Pelton wheel is among the most efficient types of water turbines. It was invented by Lester Allan Pelton in the 1870s. The Pelton.

Impulse Turbine / Pelton Turbine

FUNDAMENTALS OF FLUID MECHANICS

Fluid Mechanics 07.

Geometrical Description of Vanes of Runner P M V Subbarao Professor Mechanical Engineering Department Provision of Features to Efficient & Benign Muscle.…

Nozzles & Jets for Pelton Wheels A Special Device to implement Pure Momentum based Energy Exchange……. P M V Subbarao Professor Mechanical Engineering.

1  Reaction – Pressurized discharge  Pump as Turbine (PAT)  Francis Turbine  Some proprietary Turgo type turbines  Impulse – Atmospheric discharge.

Rothalpy P M V Subbarao Professor Mechanical Engineering Department Design variations through Conservation of Rothalpy….

Francis turbines Examples Losses in Francis turbines NPSH

Evolution of Original Pelton Wheel into Modern Pelton Wheel Creative Ideas for Quasi-static Execution of Iso- Rothalpy Process.……. P M V Subbarao Professor.

Gas Dynamics of Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department Its Group Performance, What Matters.……

PERFORMANCES IN ELECTRIC AUTOMOBILES Department of Mechanical Engineering University of Zaragoza 1 ANALYSIS OF PERFORMANCES IN ELECTRIC AUTOMOBILES PROF.

Closing Remarks on Pelton Wheel

Options for High Head Hydro Sites Design of Strong and Compact Muscles for High Specific Energy ……. P M V Subbarao Professor Mechanical Engineering Department.

Development of Turbine Cascades

Micro Turbines : Turbo-expanders New Solutions for Distributed Green & Waste Resources….. P M V Subbarao Professor Mechanical Engineering Department.

Classification of Flow Regimes : Blade Profile Losses

Boundary Layer Correction of Viscous Flow Through 2 D Turbine Cascades

Design of Components of Francis Turbine

Design Analysis of Francis Turbine Runner

The Thrust Generator P M V Subbarao Professor Mechanical Engineering Department Another Passive Device…… An Obvious Concept for Generation of Motive Power.

Matching of Bucket to Jet in Pelton Wheels Satisfying the Concerns of Pelton……. P M V Subbarao Professor Mechanical Engineering Department.

Motion of Fluid Particles, An Essential Need of Humans…… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Kinematics of Viscous.

Hydrodynamic Design of Francis Turbine Runner

Large Steam& Gas Turbines P M V Subbarao Professor Mechanical Engineering Department Backbones of Modern Nations ……

Similarity Laws for Turbo-machinery P M V Subbarao Professor Mechanical Engineering Department From Inception to Utilization….

Turbines RAKESH V. ADAKANE DEPARTMENT OF MECHANICAL ENGINEERING

Kaplan turbine. Jebba, Nigeria *Q = 376 m 3 /s *H = 27,6 m *P = 96 MW D 0 = 8,5 m D e = 7,1 m D i = 3,1 m B 0 = 2,8 m.

Design Analysis of Parts of Francis Turbine

Basic Mechanical Engineering-Hydraulic Turbines

Matching of Machine with Resource/Demand P M V Subbarao Professor Mechanical Engineering Department A Response time Based Parameter….

Gas dynamics of Real Combustion in Turbo Combustor P M V Subbarao Professor Mechanical Engineering Department Make Sure that design is Acceptable to Gas.

BASIC MECHANICAL ENGINEERING. TURBINES TURBINES Hydraulic Turbines 1. Impulse Turbine – Pelton Wheel Potential energy of water is converted into kinetic.

P M V Subbarao Professor Mechanical Engineering Department

Performance Analysis of Multi Stage Axial Flow Compressors

G.H. Patel College of Engineering and Technology

Water turbines Billy Gerena # Robert De Aza # 66880

HYDRAULIC TURBINES By:- Sagar Mewada

Hydraulic Turbines  EN:  TAILOR VIPUL.B. SUBMITED TO :- B.J.SHETH.

I PREPARED BY: DR. BRIJESH GANGIL ASST. PROFESSOR HNBGU.

Sub.Teacher Ms. Nilesha U.Patil

P M V Subbarao Professor Mechanical Engineering Department

HYDRAULIC TURBINES AND ITS CLASSIFICATION

Fluid Mechanics and Machinery Hydraulic Turbines

The Multistage Impulse Turbines

PELTON WHEEL AND FRANCIS TURBINE

Gas Dynamics for Study of Critically Off-Design Conditions

TURBOMACHINES Chapter 1 INTRODUCTION

Euler’s Vision of Newton’s Laws of Motion

Performance Analysis of Steam Turbines

Reaction Turbines.

Design Analysis of Axial Flow Gas Turbines

Initial Designs of Turbines

Analysis of Multi Stage Steam Turbines

Solar Energy Based Energy Systems - II

TURBOMACHINES Chapter 8 HYDRAULIC TURBINES

Estimation of Profile Losses

Power Plant Steam Turbines

Basic Mechanical Engineering-Hydraulic Turbines

Reaction force on Pelton turbines

Reaction force on Pelton turbines

Analysis & Control of Profile Losses

Design of Steam & Gas Turbines

Turbines for Steam Power Plants

Hydraulic Turbines Presented By: Vinod Dahiya

Presentation transcript:

Jets & Buckets for Pelton Wheels Means to Complete the Second Law of Power Retrieval……. P M V Subbarao Professor Mechanical Engineering Department

Geometrical Relations for Nozzle dOdO 2d O – 2.4d O 5d O – 9d O 0.8d O – 0.9d O 1.2d O – 1.4d O 1.1d O – 1.3d O

Numerical Computation of Total Pressure Variation

Jet carrying a discharge of Q to deliver a power P To generate a discharge of Q, we need a least jet diameter of Acceptable Performance of Nozzle

Diameter of the Jet at the outlet, d o It is important to find out the VC and outlet jet diameters/areas The Diameter of Jet before Reaching Bucket

A Set of Relations A jet of finite velocity needs to have a relation with peripheral velocity of wheel. A jet of finite area need to have a relation with dimensions of bucket. A bucket of finite dimensions and shape should have a relation with wheel.

Jet Vs Mean Diameter of Pelton Runner Mean diameter or Pitch circle diameter: D wheel Circumferential velocity of the wheel, U wheel D wheel

Jet Power & Conditions for Maximum Power Define, Blade Speed Ratio as

Implication of Maximum Power Condition

For maximum efficiency

Optimal values of Wheel diameter to jet diameter NsNs

Experimental values of Best values of Wheel diameter to jet diameter D wheel /d jet,VC N s (rpm)  turbine P in hp, H in meters and N in rpm Essential to have a minimum of 10 for acceptable turbine efficiency.

The highest ratio used in the world is 110 (Kt. Glauraus Power House in Switzerland). Specifications of this Pelton wheel are: Power 3000HP (2.24MW)Speed: 500 rpm D wheel = 5.36md jet,VC =48.77mm Head =1,650 m Extreme Engineering Conditions

The Second Relation : Jet Vs Bucket

External stroboscopic flow visualization

Runner with Advanced Buckets

Bucket Displacement Diagram

A notch made near the edge of the outer rim of each bucket is carefully sharpened to ensure a loss-free entry of the jet into the buckets, i.e., the path of the jet is not obstructed by the incoming buckets.

BUCKET GEOMETRIC DEFINITIONS

Geometric Details of Bucket The hydraulic efficiency depends more on the main bucket dimensions (length (A), width (B) and depth (C)). The shape of the outer part of its rim or on the lateral surface curvature also has marginal effect on hydraulic efficiency.