NRW - Danish technology and management solutions. David Yang

Transcription

1 NRW - Danish technology and management solutions David Yang yzy@dhigroup.com

2 NRW (non revenue water) Apparent losses (commercial losses) inaccurate metering data handling errors theft Real losses (physical losses) leakage overflow Unbilled authorized consumption Fire fighting Water for free Start with the low hanging fruits..

3 The Apparent Loss / Commercial Loss Commercial losses are typically about 30% of the total losses but ~ 75% of financial value of water losses A strategy that prioritises reduction of commercial losses pays back fast!

4 Solutions to water leakage - NRW Water has a price metering and pricing are needed District metered areas Pressure management Leakage repairs (reactive and/or proactive) Pipe replacement program Denmark: 76% of pipes are older than 1945, yet loss is only 7%

5 District metered area 1. Divide distribution network into district metered areas (DMA) by use of hydraulic network model 2. Installation of SCADA and flow and pressure instruments 3. Balance between inflow to DMA and metered consumption

6 Hydraulic Model Trunk Model with pipes bigger than 300mm

7 District DMA border Main pipe (all connected) Supply pipe Supply from main pipe District meter Emergency supply

8 Pressure management Pressure zones Demand dependent pressure (controlled in real-time with pumps and valves) High demand => high pressure Low demand => low pressure

9 MINERWA - Water distribution an integrated management system User interface WEB or thin clients Billing MINERWA MIKE CUSTOMISED and KeyZones Base maps Pipeline registration Costumer service SCADA MIKE URBAN Model analyser Data transmission Water supply network/district Metering Zones Flow and pressure Meter Pressure control Energy consumption Water quality

10 MINERWA MAP OVERVIEW WITH KPI

11 MINERWA OVERVIEW MAP Pressure and flows

12 MINERWA NIGHT FLOW WATCH Abnormal flow = leakage Repair work High Night Flow detected Night Flow back to normal

13 Solutions proved to work Approach, methods and Danish Technologies The Systematic approaches increase revenue - save water & energy Reference Examples Danish Solutions and Technologies

14 NRW project in Seremban - Malaysia Project facts: No. of connections: No. of inhabitants: Pipe lengths: ~800 km No. of DMAs: 55 NRW Baseline: 39 % Reduction with 18 % in 6+12 month 19/05/

15 Seremban I Malaysa: Installation of bulk meters and Baseline defined Data Acquisition: ~ 1000 km pipes + all consumer meter GIS and NRW management system instaled Hydraulic model 55 DMZ established 20 Pressure Management Areas Web-based SCADA system Leakage monitoring system Leak detection/leak repair (>3000) Meter replacement program Pipe replacement program

16 NRW % Seremban - NRW down with 18 % to 21 Seremban NRW % Development BASELINE Target October 2006 January 2007 April 2007 July 2007 October 2007 January 2008 April 2008 Month

17 Seremban NRW project: Business case Savings during project period USD 1,500,000 Savings per month after project USD 200,000 Sustain current NRW - cost per month. USD 75,000 Project Cost. USD 4,400,000 Pay back time Month 26

18 What happen after we finish the project????? You have to continue the work, and monitor!!! Udarbejdet af: 18

19 Technology Transfer and capacity building

20 W 19 W 20 W 21 W 22 W 23 W 24 W 25 W 26 W 27 W 28 W 29 W 30 W 31 W 32 W 33 W 34 W 35 W 36 W 37 W 38 W 39 W 40 W 41 W 42 W 43 W 44 W 45 W 46 W 47 W 48 W 49 W 50 W 51 W 52 W 53 W 54 W 55 W 56 W 57 W 58 W 59 W 60 W 61 W 62 W 63 W 64 W 65 W 66 W 67 W 68 W 69 LANGKAWI MALAYSIA Important component was establishing a NRW unit and the improvements were maintained! m3 20,000 18,000 16,000 Former situation Overall Losses DMZ L15 at Taliworks Corporation, Malaysia Leak detection & spot repair Pressure managemen t Holiday Normal maintenance Rehabilitation of the worst pipes 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 m3 losses Total reduction from 14,000 m3/w to 4,000 m3/week in DMZ

21 Dong Da district 10 % of Hanoi Water supply! By: Rune Pedersen 21

22 Key figures for Dong Da district Connections: 47,000 Supply: min. 250,000 consumers Supplied water: 20 mill M 3 /year Billed water: 13 mill M 3 /year NRW and Supply pressure average: SW-area: 2,5 bar = NRW % GW-area: Average 0,6 bar = NRW % All connections has roof tanks and individual pumps Hanoi is a fast growing city, every drop is needed! By: Rune Pedersen 22

23 IWA Water Balance for Hanoi Prepared by: JDN

24 Dong Da Zone Red line: Supply boarder Black line: Project boundary Low pressure (< 1.0 bar) NRW 35 % High pressure (> 2.0 bar) NRW 39 % By: Rune Pedersen 24

25 Hanoi Water targets: 24/7 supply > 10 bar at most critical consumer No need for roof tanks or individual pumps Hanoi target: NRW reduced by at least 1 % per year to 2025 Our target for the project is below 20 % in less that 2 years By: Rune Pedersen 25

26 Solutions proved to work Approach, methods and Danish Technologies The Systematic approaches increase revenue - save water & energy Reference Examples Danish Solutions and Technologies

27 Danish Solutions and Technologies Hardware AVK valves GRUNDFOS World leading pump manufacturer (DDD) KAMSTRUP smart meters for water and energy Danfoss Control systems MJK Control systems Sorbisense - Monitoring Smartware - Integrated Solutions DHI Expert in Water Environments Ramboll Consultanting Company

28 Thank you for your attention more information.. A package for download is available slides and selected references and brochures Leave your business card with contact address Contact: David Yang: Yzy@dhigroup.com