IWA | International Water Association Asset Management for Enhancing Energy Efficiency in Water and Wastewater Systems Marbella, Spain | 24-26 April 2013 Pump Energy Efficiency Field Testing & Benchmarking in Canada Fabian Papa & Djordje Radulj , HydraTek & Associates Inc. Bryan W. Karney , University of Toronto Malcolm Robertson , Robertson Technology Pty Ltd.
Ontario-Wide Pump Testing Program Ontario is largest province in Canada with 12.9 million (37% of total population of 34.5 million) 152 water pumps 8 municipal water utilities Final report: April/May 2013 Main Technology: Thermodynamic Method
Pumping Basics Motor VFD Pump Input Power P Drive Efficiency Motor Efficiency Pump Efficiency h M h D h P Q H P h h h D M P
Statistics of Pumps Tested 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) 30 25 Number of Pumps 20 15 10 5 0 <100 100-199 200-299 300-399 400-499 500-599 600-699 700-799 800-899 900-999 >1000 Pump Size (HP)
Testing Methods: Conventional vs. Thermodynamic Property of Water What We Want Q H P h h h D M P Wasted Energy Converted Largely to Heat Energy Non-Pump Items (Temperature Probes Capable of Measuring Accurately to 10 -3 K) Conventional Method Thermodynamic Method Measure Power (P) Measure Power (P) Measure TDH (H) Measure TDH (H) Estimate h D and h M Estimate h D and h M Measure Temperature Gain Measure Flow (Q) DIRECT MEASUREMENT OF Calculate Pump Efficiency Pump Efficiency h P h P , INDIRECTLY Calculate Flow (Q), if desired
Terminology & Sample Testing Results Manufacturer’s Best Efficiency Point Overall Efficiency Gap Efficiency Loss Tested Best Typical Efficiency Operating Point Point
Average Efficiency Loss: 9.3% Program Average Overall Efficiency Gap: 12.7% Average Tested Pump Efficiency: 73.7% Results Average Tested Wire-to-Water Efficiency: 69.4% Average Utilization Rate: 27% Issues/Opportunities: • Energy (and $$) conservation • Asset Management • Improve modelling accuracy • Commissioning Testing (are we getting what we paid for?) • Etc.
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) 9
Pump Testing Program: Discoveries New Pump Installation You cannot manage what you don’t measure. Excellent Problem… Agreement
Benchmarking Specific Energy (kWh/m 3 ) is an incomplete metric for pumps Pump Energy Indicator, PEI (kWh/Mm 3 /m H 2 O) preferred N.B. Same as IWA PI: Standardised Energy Consumption (kWh/m 3 /100m) Q H P h P PEI h h h Q H D M P
Pump Energy Indicator, PEI Average PEIs (and instantaneous Standardised Energy Consumptions) : MBEP: 3350 kWh/Mm 3 /m H 2 O 0.355 kWh/m 3 /100m TBEP: 3770 kWh/Mm 3 /m H 2 O (+12.5%) 0.377 kWh/m 3 /100m TOP: 3980 kWh/Mm 3 /m H 2 O (+18.8%) 0.398 kWh/m 3 /100m Intuitive and directly applicable Micro- & Macro-level analyses Pump combination selection Based on in situ conditions
Financial Implications & Economic Modelling Annual Power Consumption of All Pumps Tested: 161,230 MWh Annual GHG Emissions of All Pumps Tested: 27,400 tonnes CO 2 Annual Running Costs of All Pumps Tested: C$16+ million Average Annual Pump Running Cost Per: C$106,000
IWA | International Water Association Asset Management for Enhancing Energy Efficiency in Water and Wastewater Systems Marbella, Spain | 24-26 April 2013 Pump Energy Efficiency Field Testing & Benchmarking in Canada 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
Recommend
More recommend
