The untapped Water and Energy Efficiency Opportunities in Municipal Water Systems. Mike Rabe OECD Workshop November 2005 Pilansberg

Transcription

1 The untapped Water and Energy Efficiency Opportunities in Municipal Water Systems Mike Rabe OECD Workshop November 2005 Pilansberg

2 Who is the Alliance to Save Energy? ¾ ¾ ¾ ¾ U.S. based NGO coalition of prominent business, government, environmental and consumer leaders promoting the efficient and clean use of energy worldwide to benefit the environment, economy, and major stakeholders Expertise in Building, Industrial, International, Financing, Utility, Water and Energy management, Policy, Market Development, and Education sectors Over 90 Alliance Associates Alliance runs programmes in many countries around the world

3 What is the relationship between water and energy? In many water supply systems (water and wastewater), energy represents the single biggest input cost in the final delivered product (up to 50% ) Wasted Water = Wasted Energy Resources Inefficiencies common within municipal supply systems Addressing inefficiencies in systems results in substantial water savings and hence also substantial energy savings Therefore substantial quantities of energy can be saved within municipal water systems

4 Hence. The Watergy Programme of the Alliance to Save Energy

5 The Watergy Programme: The Alliance currently undertakes the Watergy Programme in six developing countries, namely Brazil, Mexico, India, Philippines, Sri Lanka and South Africa Funded mainly by USAID, but also by REEEP, municipalities and Coca Cola in South Africa Promotes efficiency interventions and provides especially technical assistance to municipalities with this objective in mind

6 Efficiency is about Creating higher levels of integrated management especially as it relates to service delivery practices Alternatively creating dedicated management units that focus on inefficiencies and the implementation of appropriate solutions Re-engineering infrastructure and supply technologies Looking backwards and forwards and the supply/demand chain

7 The Holistic Approach Demandside and Supply-side Interventions Supply Side Efficiency Measures WATERGY Comprehensive Demand /Supply Side Approach Synergies Demand Side Efficiency Measures Consumers Residential/Industrial Efficiency Watergy Efficiency seeks to cost effectively deliver water services while minimizing water and energy use. = Water supply systems offer multiple opportunities to directly reduce water and energy waste while better serving the customers needs Leak and Loss Reduction Operations & Maintenance Pumping systems Primary/secondary wastewater treatment Pressure Management Preventative Maintenance + Reducing demand by helping the consumer use water more efficiently decreases the required water supply saving both energy and water Water efficient household appliances Metering, billing and credit control Low-flow plumbing fixtures Industrial water reuse Leak and water waste reduction Aligning Level of Service to affordability + Looking at a water system comprehensively and making sure efficiency projects are designed in tandem creates even greater efficiency opportunities Right sizing pump systems after reducing consumer demand Identified cascading effects of efficiencies Avoided wastewater treatment by promoting reuse and reducing demand Embed principles in building codes

8 Supply and Demand Side Interventions: Supply Side: Addressing leaks low c-value (high friction) for pipes improper system layout system over-design incorrect equipment selection old, outdated equipment Lack of preventative and proactive maintenance Poor reactive maintenance wastage of usable water inefficient pumps and motors, correcting power factors Pressure management Load shifting

9 Supply and Demand Side Interventions (cont.) Demand Side: Metering, billing and revenue collection Retrofitting water efficient household appliances including toilets Industrial water reuse Leak and water waste reduction Efficient basin Aerators Efficient washing appliances Matching service level provision to affordability Xeriscaping Drip Irrigation Rebate installation programmes

10 The South African Context: Much political change and transition cascading down to the municipal level over the last 10 years Focus on many issues and especially service delivery expansion A tension (balance) exists between service delivery extension and service delivery efficiency Cannot continue expanding forever without focusing on efficiencies as the constraint very quickly becomes one of resource =>A strong focus on efficiency is already needed in South Africa

11 Synergies resulting from the Watergy Co-management Approach Reduced Costs Reduced Capital Investment Improved affordability / sustainability Upgraded water and energy services Expanded service delivery footprint Reduced Air Pollution Improved Public Health Minimized impact on Natural Resources Reduced Global Climate Change Impact

12 Case Study: Results of a co-ordinated supply and demand side approach to water services in the Kagiso area of Mogale City Kagiso Consumption M o nt hs

13 Other examples in S.A. Operation Gcin amanzi project in Soweto Khayalitsha pressure management project Sebokeng Pressure Management Project ethekwini optimization of water system Munsieville Leak Repair Project

14 For More Information Mike Rabe or Judith Barry at the Alliance to Save Energy