Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009

Water Services Training Group

13th Annual Conference

10th September 2009

Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009

Energy Efficiency Benchmarking

Jim McGuire

Senior Engineer

North Tipperary County Council

Acknowledgements:

WRC , SwindonDepartment of Environment, Heritage

and Local GovernmentEoin ODonoghue, NTCCTipperary Energy Agency

Energy: Why Worry?

Reducing availabilityPeripheralityClimate ChangeEnergy costs

Policy Drivers

Kyoto AccordEU Targets

20% reduction CO2 emissions by 2020Irish National targets

33% energy reduction in public sector by 2020

Energy use in Local Authorities

water services

public lighting

buildings

vehicles

50%

PROJECT OBJECTIVES:

Energy: how much are we using, where are we using it and how do we compare with each other?

What is the benchmark for energy efficient treatment?

What can be reasonably achieved in terms of further efficiencies on a site-specific basis?

Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009

Project Partners

Meeting the Challenges of the Changed Economic Environment Annual Conference September 2009

Is this a good apple?

Can we compare?

Project Phases:

Phase 1 - DevelopmentDevelop benchmarking programmeDevelop Software

Phase 2 – Implementation at pilot scale

Phase 3 – Roll-out to other works

Project Development

Benchmarking best practice reviewDevelop energy performance indicators:

Water treatmentWastewater treatmentSludge treatment and odour control

Establish measurements & measurement frequency

Develop software

Steps to build a new site

Gain access to web-based softwareBuild the schematicEnter static dataUpload time series dataBatch runDisplay reports

Software

Model Building

and Outputs

Water: Coolbawn Schematic

Waste Water:Nenagh Schematic

Static Data Input

Data input (time series data)

Fill in excel

Sheet

Upload data onto site

View loaded data

Waste Water: New Meters

Electrical Sub-metersInlet works

Rotors O.D No. 1

Rotors O.D No. 2

WAS pumps

RAS Pumps

Dewatering

Flow Meters:WAS

Water: Coolbawn New Meters

Electrical Sub-MetersRaw water abstraction pumpsBack wash pumps and blowersDewateringFinished water high lift pumps

Flowmeter, Sub-Meters

Benchmarking Software output

Routine reports GraphsDetailed reports

Comparison reports within company

Comparison reports between companies

Software output (Water)

Routine report (table) for each process and whole works

Energy performance indicators Actual/Theoretical EPI (kWh/Ml) Actual/Theoretical EPI (kWh/Ml/m) (Pumps)

Routine reports (Wastewater)

Wider range of Energy Performance Indicators (EPI) for Wastewater

Actual/Theoretical EPI (kWh/Ml) Actual/Theoretical EPI aeration efficiency

(Activated Sludge) Actual/Theoretical EPI (kWh/kgBOD)

(Activated Sludge) Actual/Theoretical EPI (kWh/kgNH3-N)

(Activated Sludge) Actual/Theoretical EPI (kWh/Ml/m)

(Pumps)

Water: High Lift Pump Coolbawn

Comparison with other sites:Energy Performance Indicator:

KWH/ML/M

Water: Abstraction Pump Coolbawn

Comparison with other sites Energy Performance Indicator:

kWh/Ml/m

Wastewater Pumping: Nenagh

Comparison with other sites

Energy Performance Indicator kWh/1000m3/m

Water: Abstraction Pump Change

Waste Water: Activated Sludge

Comparison with other sites EPI is kWh/1000m3

Waste Water: Activated Sludge

Comparison with other sites EPI is kWh/kgBOD

Water: Energy Use Coolbawn

Waste Water: Energy use

Other Features of Project Website

Best Practice AreaUpdates of Software Users GuideReport on EPIReport on MeasurementReport on Sub-meteringReports on Innovation

Discussion Area

Conclusions

Software allows International comparison of processesWithin company comparisonsBest Practice AreaDiscussion Area

Possible ImprovementsMore participationGreater time frame flexibilityFocus on high energy processes

FINAL WORD

MANAGING ENERGY CONSUMPTION

RESULTS IN

VALUE FOR MONEY