In-conduit Hydropower:  Public Sector meets Private Inventions
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In-conduit Hydropower: Public Sector meets Private Inventions Matt Swindle, CEO, NLine Energy f or Three Valleys Municipal Water District Urban Water Institute Palm Springs, CA. Agenda. About TVMWD Existing Hydropower Unit and Operations Opportunity for New Hydropower Development

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In-conduit Hydropower: Public Sector meets Private Inventions

Matt Swindle, CEO, NLine Energy

for

Three Valleys Municipal Water District

Urban Water Institute

Palm Springs, CA


Agenda
Agenda Inventions

  • About TVMWD

  • Existing Hydropower Unitand Operations

  • Opportunity for New Hydropower Development

  • TVMWD Partnership with NLine Energy

  • About NLine Energy


About tvmwd
About TVMWD Inventions

  • Wholesale, municipal water agency formed in 1950 located in Claremont, CA serving 13 retail water agencies with a population of 525,000

  • Supplement and enhance local water supplies ~70,000 AF/Year

    • Surface water treatment plant – 25 mgd capacity (~20,000 AF/year)

    • Hydroelectric Facilities - 4,000,000 kWh/year


Miramar hydro s tation
Miramar Hydro InventionsStation


Miramar hydro s tation1
Miramar Hydro InventionsStation

  • Commissioned in 1987

  • 535 kW hydro station under Qualifying Facilities (QF) agreement with SCE

  • Power offsets onsite electrical use

  • Flow provided by the MWD Rialto Feeder – variable pressure & flow

  • Operates mainly in winter(min. pressure = 60 psi)


Opportunity for new hydro development
Opportunity for New Hydro Development Inventions

  • Hydraulic grade changes in MWD feeder over time

    • Significant bypass flows during “prime” summer months ($value of energy: summer vs. winter)

    • Decreased power generated at Miramar hydro due to lower operating pressures in MWD feeder

    • Loss of revenue when large hydro unable to operate

  • Problem statement – “Is it technically and financially feasible for TVMWD to capture bypass flows with new hydro unit(s)?”


Miramar Inventions: Pressure & Flow Analysis(2007)

Existing Hydro Operation

Pmin = 60 psi

0 20 40 60 80 100 120

Pressure (psi)

10 cfs

28 cfs

0 5 10 15 20 25 30 35 40 45

Flow (cfs)


Tvmwd partnership with nline energy
TVMWD Partnership with NLine Energy Inventions

  • ACWA’s Small Hydro Approved Preferred Provider

  • Provided no-cost preliminary Feasibility Assessment (Jun. – Oct. 2011)

  • Tasked to perform more detailed analysis (Oct. 2011)

    • Two (2) pump-turbine units rated at combined 292-kW

    • Capture bypass flows

    • Offset new groundwater well pumping costs


Timeline
Timeline Inventions

  • Board approved Development Services Agreement (DSA) with NLine using CA Code 4217 - June 2012

  • Design complete – June 2013

  • SCE interconnection approved – October 2013

  • FERC conduit exemption issued – November 2013

  • SCE SGIP grant reservation – December 2013

  • Construction contract issued – December 2013


Project attributes
Project Attributes Inventions

  • Sized to meet current and future flows and pressures

  • Serves on-site load requirements through self-generation

  • Annual Generation ~ 580,000 kWh, Cost Estimate ~ $1.45M, Annual Revenue ~ $110k, Payback period ~15 yrs

    • ~$100k required SCE interconnection upgrades

  • Opportunity to secure outside funding - Self-Generation Incentive Program (SGIP) grant ($125,000)

  • Commissioning planned for July 2014


NLine Energy: Inventions

Overview

  • Small-hydro singular focus

    • In-conduit (pipelines)

    • Conduit (canals)

    • Retrofit / Rehabilitate existing hydro

    • Small pumped hydro storage

  • California-based business

  • Association of California Water Agencies (ACWA) Approved Preferred Small Hydro Provider

  • 25 MW development pipeline


Questions
Questions? Inventions


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