Pump Energy Efficiency Field Testing & Benchmarking in Canada - - PowerPoint PPT Presentation

Pump Energy Efficiency Field Testing & Benchmarking in Canada

IWA | International Water Association Asset Management for Enhancing Energy Efficiency in Water and Wastewater Systems Marbella, Spain | 24-26 April 2013

Fabian Papa & Djordje Radulj, HydraTek & Associates Inc. Bryan W. Karney, University of Toronto Malcolm Robertson, Robertson Technology Pty Ltd.

 152 water pumps  8 municipal water utilities  Final report: April/May 2013  Main Technology: Thermodynamic Method

Ontario-Wide Pump Testing Program

Ontario is largest province in Canada with 12.9 million (37% of total population of 34.5 million)

Pumping Basics

Pump Motor

Input Power P Motor Efficiency hM Pump Efficiency hP Drive Efficiency hD

VFD

P M D

H Q P h h h      

5 10 15 20 25 30 <100 100-199 200-299 300-399 400-499 500-599 600-699 700-799 800-899 900-999 >1000 Number of Pumps Pump Size (HP)

 Oldest Pump Tested: 61 years  Youngest Pump Tested: 1 year  Average Age of All Pumps Tested: 25 years  Range of Pump Motor Sizes Tested: 30 hp (22.5 kW) to 4000 hp (3000 kW)

Statistics of Pumps Tested

Testing Methods: Conventional vs. Thermodynamic

 Measure Power (P)  Measure TDH (H)  Estimate hD and hM  Measure Flow (Q)  Calculate Pump Efficiency hP, INDIRECTLY

Conventional Method Thermodynamic Method

 Measure Power (P)  Measure TDH (H)  Estimate hD and hM  Measure Temperature Gain

 DIRECT MEASUREMENT OF Pump Efficiency hP

 Calculate Flow (Q), if desired

P M D

H Q P h h h      

What We Want Property

• f Water

Non-Pump Items Wasted Energy Converted Largely to Heat Energy

(Temperature Probes Capable of Measuring Accurately to 10-3 K)

Terminology & Sample Testing Results

Overall Efficiency Gap Efficiency Loss

Manufacturer’s Best Efficiency Point Tested Best Efficiency Point Typical Operating Point

Program Results

Issues/Opportunities:

• Energy (and $$) conservation
• Asset Management
• Improve modelling accuracy
• Commissioning Testing

(are we getting what we paid for?)

• Etc.

Average Efficiency Loss: 9.3% Average Overall Efficiency Gap: 12.7% Average Tested Pump Efficiency: 73.7% Average Tested Wire-to-Water Efficiency: 69.4% Average Utilization Rate: 27%

9

Case Study: Pump Refurbishment

 2 refurbishments in program

 Pump 1: 10.7% Recovery; 71% of Efficiency Loss  Pump 2: 11.4% Recovery; 65% of Efficiency Loss (assuming original curves indeed valid for installation)

Pump Testing Program: Discoveries

New Pump Installation

Excellent Agreement Problem…

You cannot manage what you don’t measure.

Benchmarking

Specific Energy (kWh/m3) is an incomplete metric for pumps Pump Energy Indicator, PEI (kWh/Mm3/m H2O) preferred N.B. Same as IWA PI: Standardised Energy Consumption (kWh/m3/100m)

P M D

H Q P h h h       H Q P    h  PEI

Pump Energy Indicator, PEI

 Intuitive and directly applicable

 Micro- & Macro-level analyses

 Pump combination selection

 Based on in situ conditions  Average PEIs (and instantaneous Standardised Energy Consumptions):

 MBEP: 3350 kWh/Mm3/m H2O 0.355 kWh/m3/100m  TBEP: 3770 kWh/Mm3/m H2O (+12.5%) 0.377 kWh/m3/100m  TOP: 3980 kWh/Mm3/m H2O (+18.8%) 0.398 kWh/m3/100m

Financial Implications & Economic Modelling

 Annual Power Consumption of All Pumps Tested: 161,230 MWh  Annual GHG Emissions of All Pumps Tested: 27,400 tonnes CO2  Annual Running Costs of All Pumps Tested: C$16+ million  Average Annual Pump Running Cost Per: C$106,000

Contact: Fabian Papa, M.A.Sc., M.B.A., P.Eng. f.papa@hydratek.com +1 416 565 0158 Djordje Radulj, M.A.Sc., P.Eng. d.radulj@hydratek.com +1 416 888 1024 Bryan W. Karney, Ph.D., P.Eng. karney@ecf.utoronto.ca +1 416 978 7776 Malcolm Robertson, Ph.D. malcolmear@westnet.com.au +61 8 9300 0844 HydraTek & Associates Inc. info@hydratek.com www.hydratek.com

Pump Energy Efficiency Field Testing & Benchmarking in Canada

IWA | International Water Association Asset Management for Enhancing Energy Efficiency in Water and Wastewater Systems Marbella, Spain | 24-26 April 2013