Small scale hydropower optimization
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Small-Scale Hydropower Optimization. ME/EE Senior Design Project 2004/2005 Customer: John Law Mentors: Ralph Budwig (ME), Brian Johnson (EE). Phillip Arpke Kelly Jobes Jamin Juhasz Karl Krohmer Jill Nieborsky. Problem Definition.

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Small scale hydropower optimization

Small-Scale Hydropower Optimization

ME/EE Senior Design Project 2004/2005

Customer: John Law

Mentors: Ralph Budwig (ME), Brian Johnson (EE)

Phillip Arpke

Kelly Jobes

Jamin Juhasz

Karl Krohmer

Jill Nieborsky


Problem definition
Problem Definition

  • Optimize Small-scale Hydropower System For Residential Heating

  • The Generator Is Capable Of Providing 3.7 kW Power

  • Last Spring During Maximum Flow, The Generator Provided Only 1 kW Of Power


Constraints
Constraints

  • Site Vs. Lab Conditions

    • Site: 9 cfs and 40 ft/s

    • Lab: 1 cfs and 16 ft/s

  • Inherited Features

    • Three-phase Generator Sunk Cost

    • 12-inch Penstock Pipe To 6-inch Round

    • On/Off Operation With Maximum Flow


Project milestones
Project Milestones

  • Lab Tests Of Initial System

    • RPM

    • Static Torque

    • Power Output

  • System Design

    • Hydro Lab

    • Randall Creek

  • Performance Verification

    • Lab

    • Field


Cross flow turbine background
Cross-flow Turbine Background

  • Banki Turbine

    • Top Water Entry

    • Falling Action

    • h=80%


Design improvements

New Configuration

Design Improvements

  • Increased Power Output

    • Nozzle Redesign

    • Reduced Water Drag In “Hot Spot”

  • Viewing Window

Old Configuration


Nozzle design lab
Nozzle Design (Lab)

  • Design Based On Fluid Velocity (16 ft/s)

  • 15.75 in2 Cross-sectional Area

  • Hydraulic Area Constant From Round To Square


Nozzle design field
Nozzle Design (Field)

  • Design Based On Flow Rate (9.63 ft3/s)

  • 31.875 in2 Cross-sectional Area

  • Hydraulic Area Constant From Round To Square


Housing design
Housing Design

  • Eliminated Water Drag In “Hot Spot”

  • Plexiglas Top For Viewing Flow Pattern


Electrical schematic

Three Components

Resistive Heating Load (12 Ω)

Capacitor Bank (135 µF)

Induction Generator

Electrical Schematic


Manufacturing
Manufacturing

Welding Test Nozzle

Installing the Runner

Bridgeport CNC Machine

Fitting Circular Flange to Lab Nozzle


Testing
Testing

  • Measured Generator and Turbine RPMWith No-load, Shunt Capacitors Only, and 12 Ω Load With Shunt Capacitance

  • Measured Power Output For Three Cases

  • Measured Static Torque

Water Supply

Electrical Box

Generator

Turbine



Field performance
Field Performance

Diversion Setup

Diversion Canal

Installed Turbine



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