Water Loss Control Tools. Software Tools for Supply Side Efficiency

Transcription

1 Water Loss Control Tools Software Tools for Supply Side Efficiency PNWS, April 2015

2 Today s Goals 1) What is Water Loss? (10 min) 2) Water Loss Baseline AWWA Audits (20 min) 3) Intervention Strategies WRF Model (20 min) 4) Questions & Discussion throughout!

3 Water Systems Optimization Water Loss Audits Design and Implementation of Water Loss Control Programs Leak Detection Pressure Management Schemes Source Meter Testing Revenue Enhancement Programs

4 What Is Non-Revenue Water (NRW)???

5 What Is Non-Revenue Water (NRW)? Non Revenue Water consists of: Real Losses Apparent Losses

6 Apparent Losses

7 Real Losses

8 Benefits of Water Loss Control REAL LOSSES APPARENT LOSSES Saves WATER! Does not save water Creates an additional supply defers capital expenditures and marginal supply development Optimizes REVENUE GENERATION

9 What Can Happen without NRW Management?

10 Benefits of NRW Management Save Water Reduce Costs Culture of Accountability Identify what you DON T know Comprehensive understanding of your system Financial Benefits Reduction in O&M & CIP costs Better Asset Management Optimized Meter Replacement/Management Water Conservation (Supply Side & Demand Side) Sustainability (Water/Energy Nexus) Be Ahead of Regulatory Arena Less Liability Build Credibility with Stakeholders and Regulators

11 How Can We Strategically Manage NRW?? Detailed Water Audit Conduct Detailed AWWA Water Audit to Quantify NRW Volume and its Components Real Losses and Apparent Losses Component Analysis Component Analysis of Real Losses Component Analysis of Apparent Losses Water Audit Phase Economics Assessment of Economic Real Loss Intervention Strategies Assessment of Economic Apparent Loss Intervention Strategies Implement NRW Strategy Real Loss Control and Intervention Apparent Loss Control and Intervention Sustainable NRW Management

12 Best Practice Tools for Water Loss Control AWWA M36 Publication Water Audits and Loss Control Programs (2009), 3 rd Edition features the IWA/AWWA Water Audit Methodology AWWA Water Loss Control Committee s Free Water Audit Software Current version is 5.0 in English Includes data grading capability Companion Compiler Software AWWA WLCC Water Audit Software: Reporting Worksheet? Click to access definition WATER SUPPLIED Water Audit Report for: Philadelphia Water Department Reporting Year: ALL VOLUMES TO BE ENTERED AS ANNUAL QUANTITIES Volume from own sources:? M 95,526.0 million gallons (US) per year Master meter error adjustment:? M under-registered million gallons (US) per year Water Imported:? M 0.0 million gallons (US) per year? Water Exported: M 7,210.2 million gallons (US) per year. WATER SUPPLIED: 89,011.2 million gallons (US) per year. AUTHORIZED CONSUMPTION. Billed metered:? M 57,535.2 million gallons (US) per year Billed unmetered:? M 0.0 million gallons (US) per year Unbilled metered:? M million gallons (US) per year? Unbilled unmetered: E million gallons (US) per year. AUTHORIZED CONSUMPTION:. 58,408.1 million gallons (US) per year WATER LOSSES (Water Supplied - Authorized ). 30,603.1 million gallons (US) per year. Apparent Losses.. Unauthorized consumption:? E 1,145.2 million gallons (US) per year Customer metering inaccuracies:? E million gallons (US) per year Real Losses. Data handling errors:? E 2,751.2 million gallons (US) per year Apparent Losses:. 4,058.9 million gallons (US) per year Real Losses (Water Losses - Apparent Losses): 26,544.2 million gallons (US) per year. NON_REVENUE WATER. SYSTEM DATA.. WATER LOSSES: 30,603.1 million gallons (US) per year.. NON-REVENUE WATER:. 31,476.0 million gallons (US) per year. Length of mains:? M 3,160.0 miles Number of active AND inactive service connections:? M 548,289 Connection density:. 174 conn./mile main Average length of private pipe:? E 12.0 ft Average operating pressure:? E 55.0 psi COST DATA.. Total annual cost of operating water system:? M $167,604,000 $/Year Customer retail unit cost (applied to apparent losses):? M $3.95 Variable production cost (applied to real losses):? M $ $/million gallons (US).. DATA REVIEW - Please review the following information and make changes above if necessary: - Input values should be indicated as either measured or estimated. You have entered: 12 as measured values 6 as estimated values 0 without specifying measured or estimated - It is important to accurately measure the master meter - you have entered the measurement type as: measured - Cost Data: No problems identified PERFORMANCE INDICATORS Financial Indicators Operational Efficiency Indicators Copyright 2006, American Water Works Association. All Rights Reserved Non-revenue water as percent by volume: 35.4% Non-revenue water as percent by cost: 11.7% Annual cost of Apparent losses: $16,012,518 Annual cost of Real Losses: $3,545,768 Apparent losses per service connection per day: Real losses per service connection per day*: Real losses per length of main per day*: Real losses per service connection per day per psi pressure: $/1000 gallons (US) N/A gallons/connection/day gallons/connection/day Back to Instructions Please enter data in the white cells below. Where possible, metered values should be used; if metered values are unavailable please estimate a value. Indicate this by selecting a choice from the gray box to the left, where M = measured (or accurately known value) and E = estimated. (pipe length between curbstop and customer meter or property 2.41 gallons/connection/day/psi? Unavoidable Annual Real Losses (UARL): 5.98 million gallons/day Water Research Foundation Reports? Infrastructure Leakage Index (ILI) [Real Losses/UARL]: * only the most applicable of these two indicators will be calculated Project 2811: Evaluating Water Loss and Planning Loss Reduction Strategies Project 2928: Leakage Management Technologies WRF 4372 published in May 2014 Textbooks

13 The Water Balance SYSTEM INPUT VOLUME Authorized Billed Authorized Unbilled Authorized Apparent Losses Billed Metered Authorized Billed Unmetered Authorized Unbilled Metered Authorized Unbilled Unmetered Authorized Metering Errors Unauthorized Systematic Data Handling Errors REVENUE WATER NON- REVENUE WATER Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

14 Water Balance Validation SYSTEM INPUT VOLUME Authorized Billed Authorized Unbilled Authorized Apparent Losses Billed Metered Authorized Billed Unmetered Authorized Unbilled Metered Authorized Unbilled Unmetered Authorized Metering Errors Unauthorized Systematic Data Handling Errors Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

15 System Input Volume ACCURACY OF METERS IS CRITICAL!

16 System Input Validation Volumetric Meter Test Comparative Meter Test

17 MGD Challenge Data Transfer Accuracy (( 4-20mA signal) - 4) Maximum Calibration Flow Rate (MGD) = [ 16 ] * Flow-range (MGD) 14 Reservoir A raw water flowmeter data chain analysis Comparison of converted 4-20 ma signal and SCADA reading :40:06 14:57:23 raw 4-20 ma signal from meter converted to MGD SCADA value MGD 15:14:39 15:31:56 15:49:13 16:06:30 16:23:47 16:41:03 16:58:20 17:15:37 17:32:54 17:50:11 18:07:27 18:24:44 18:42:01 18:59:18 19:16:35 19:33:51 19:51:08 20:08:25 20:25:42 20:42:59 Time 21:00:15 21:17:32 21:34:49 21:52:06 22:09:23 22:26:39 22:43:56 23:01:13 23:18:30 23:35:47 23:53:03 0:10:20 0:27:37 0:44:54 1:02:11 1:19:27 1:36:44 1:54:01 2:11:18

18 Billing Data Validation SYSTEM INPUT VOLUME Authorized Billed Authorized Unbilled Authorized Apparent Losses Billed Metered Authorized Billed Unmetered Authorized Unbilled Metered Authorized Unbilled Unmetered Authorized Metering Errors Unauthorized Systematic Data Handling Errors Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

19 Billing Data Validation Export Raw Billing Data Checks on Accuracy Customer identification fields Meter identification fields Service type identification fields Meter read and consumption fields units Trouble codes or flags Remove Financial Adjustments Consider Exclusion of Accounts (Recycled? System?) Consider lag between read date and start and end of audit period volumes by meter size and model volumes by meter size and revenue class

20 Billing Data Validation SYSTEM INPUT VOLUME Authorized Billed Authorized Unbilled Authorized Apparent Losses Billed Metered Authorized Billed Unmetered Authorized Unbilled Metered Authorized Unbilled Unmetered Authorized Metering Errors Unauthorized Systematic Data Handling Errors Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

21 Apparent Loss Validation Meter Size Meter Population Test Sample Size Volume- Weighted Average Accuracy 95% Confidence Limit of Accuracy 5/8 13, % 4.0% 3/4 1, % 0.4% 1 2, % 4.2% 1-1/ % 3.8% % 1.7%

22 Apparent Loss Validation Meter size Total volume supplied through meters during audit period (MG) Average accuracy based on meter test results Apparent Losses during audit period (MG) 5/ % / % % / % % Total 1,

23 Water Balance Complete SYSTEM INPUT VOLUME Authorized Billed Authorized Unbilled Authorized Apparent Losses Billed Metered Authorized Billed Unmetered Authorized Unbilled Metered Authorized Unbilled Unmetered Authorized Metering Errors Unauthorized Systematic Data Handling Errors Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

24 Performance Indicators AWWA Recommended Performance Indicators Real Losses/service conn/day Apparent Losses/service conn/day Infrastructure Leakage Index (ILI) ILI = CARL/UARL Unavoidable Annual Real Losses Current Annual Real Losses

25 Performance Indicators MGD % MGD % System Input % System Input % Sales 70 70% Sales 70 70% Non-Revenue Water 30 30% Non-Revenue Water 30 30%

26 Performance Indicators 50 MGD % MGD % System Input % System Input % Sales 70 70% Sales % Non-Revenue Water 30 30% Non-Revenue Water 30 20%

27 Performance Indicators Utility % Real Losses ILI ELL A 23% 6 Close to ELL B 23% 8 Close to ELL C 36% 2 Close to ELL D 4% 1.6 Close to ELL E 22% 2.7 Above ELL F 5% 1.7 Above ELL G 7% 3.2 Above ELL

28 WRF Project Review: #4372a Effective Organization & Component Analysis of Utility Leakage Data PROJECT BASICS: Funded by the WRF and EPA Model Release & Report Publishing in June 2014 Webinar on June PARTICIPATING UTILITIES: Eastern Municipal Water District Metro Water Services, Nashville TN Halifax Regional Water Commission City of Folsom Utilities Dept San Antonio Water System PROJECT GOALS: Provide utilities software model for component analysis of real losses Provide informative context for performance indicator results Develop the software model to optimize use (prioritizing accessibility and adoption) Lake Arrowhead Community Services District S. Central CT Regional Water Authority City of Phoenix Water Services Dept Austin Water Utility Water & Wastewater Authority of Wilson County

29 Downloading the 4372 Materials then search for 4372 or real losses 7

30 The AWWA Water Balance SYSTEM INPUT VOLUME Authorized Billed Authorized Unbilled Authorized Apparent Losses Billed Metered Authorized Billed Unmetered Authorized Unbilled Metered Authorized Unbilled Unmetered Authorized Metering Errors Unauthorized Systematic Data Handling Errors REVENUE WATER NON- REVENUE WATER Water Losses Leakage/Overflow at Reservoirs Real Losses Leakage from Trunk Mains Leakage from Distribution Mains Leakage from Service Connections

31 Water Loss Control Program Next Steps With A Completed AWWA Water Balance: Volume of Apparent Losses Volume of Real Losses Performance Indicators Data Validity Score Remaining Assessments: Understanding of Real Loss Breakdown (where are these losses occurring? what types of leakage?) Evaluation of Cost-Effective Real Loss Intervention Strategies Cost-Effective Non-Revenue Water Reduction Strategies

32 Component Analysis of Real Losses

33 Key Points For Model Development Adoption of AWWA Free Water Audit Software & Importance of Data Validation Contextualized Performance Indicators Break Frequency Research Tools for developing water loss control strategies Location & Response Time Improvement Pressure Management Proactive Leak Detection

34 Adoption of Software Methodology & Data Validation Review of statewide regulations and policies regarding water loss and the AWWA Free Water Audit software California Urban Water Conservation Council (CUWCC) BMP 1.2: annual water audit submissions Examined FY09-10 data

35 Contextualized Performance Indicators

36 Break Frequency Research Focus on Predictive Models Terminology Data Collection Completeness

37 Break Frequency Research

38 Participating Utility Insight Integrity and completeness of failure data Readiness of average utility Presentation of software as a TOOL not a REPORT! Estimation/assumption comfort

39 Real Losses Calculation for Reported & Un-Reported Leakage Annual Real Loss Volume from Reported Leaks = # of leaks by size * average run time * average flow rate (at average system pressure) Leakage Occurrence Pipe Diameter # of Events Flow Rate (gpm) Average Run Time (hrs) Annual Leakage (MG) Mains Breaks Failure Repair Records Estimated based on pipe size using BABE methodology Awareness Time Estimation + Failure Repair Records for Location & Repair Time

40 Component Analysis of Real Losses

41 Leakage Management Strategies Pressure Management Speed and Quality of Repairs Unavoidable Annual Real Losses Economic Level of Real Losses Active Leakage Control Potentially Recoverable Real Losses Current Annual Real Losses Pipeline and Asset Management: Selection, Installation, Maintenance, Renewal, Replacement

42 Proactive Leak Detection Model

43 Pressure Management in the Model

44 Response Time Improvement

45 WaterRF 4372: Effective Organization and Component Analysis of Water Utility Leakage Data Summarized Component Analysis Water Audit: City of Austin, TX, USA, 2011 WaterRF 4372 COMPONENT ANALYSIS MODEL SUMMARY As the input data is filled into the model, this sheet will populate with the results and recommendations from the Real Losses Component Analysis, A-L-R Times, Economic Intervention and Pressure Management tabs. The performance indicators from the AWWA Free Water Audit Software have been added to show a brief review of the performance the system being analyzed WATER AUDIT PERFORMANCE INDICATORS Financial Non-revenue water as percent by volume of water supplied: Non-revenue water as percent by cost of operating system: Annual cost of Apparent Losses: Annual cost of Real Losses: Operational Efficiency Apparent Losses per service connection per day: Real Losses per service connection per day*: Real Losses per length of main per day: er service connection per day per pressure: Unavoidable Annual Real Losses (UARL): Current Annual Real Losses (CARL): Infrastructure Leakage Index (ILI) [CARL/UARL]: 10.3% 3.0% $4,376,956 $1,429, gal/service conn/day 56.0 gal/service conn/day N/A gal/mi/day 0.7 gal/service conn/day/psi 1, MG/Yr 4, MG/Yr 3.0 REAL LOSS COMPONENT ANALYSIS RESULTS System Component Background Leakage Reported Unreported Failures Failures Total (MG) (MG) (MG) (MG) Reservoirs Mains and Appurtenances Service Connections Total Annual Real Loss 1, , Real Losses as Calculated by Water Audit Hidden Losses/Unreported Leakage Currently Running Undetected 4, , AWARNESS, LOCATION AND REPAIR TIME REDUCTION RESULTS Reported Failures Total Potential Savings if Location and Repair Duration is Reduced as Simulated on the A-L-R Times Options Sheet Total Potential Cost Savings if Location and Repair Duration is Reduced as Simulated on the A-L-R Times Options Sheet Unreported Failures (MG) $ 23,458 $ 10,837 Per Year ECONOMIC INTERVENTION FREQUENCY FOR PROACTIVE LEAK DETECTION RESULTS Percentage of the System to be Surveyed per Year 31 % Average Annual Budget for Intervention (Proactive Leak Detection) 283,187 $/year Potentially Recoverable Leakage 1, MG/year ALTERNATIVE PRESSURE MANAGEMENT SCENARIO RESULTS User-Inputted Reduction in Average System Pressure Assumed % Reduction in Average System Pressure Estimated Real Loss Reduction from Pressure Management Program Financial Savings from Pressure Management Program User-Estimated Cost of Pressure Reduction Resulting Pressure Management Program Payback Period 5.0 PSI 6% MG/Yr 67,026 $/Year 100,000 $ 1.5 Years

46 Please be in touch! Reinhard Sturm Water Systems Optimization e: Kate Gasner Water Systems Optimization e: