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WATER + ENERGY

WATER + ENERGY. Presented by: MBO, Inc. Your Speaker for Today. Jorge Torres Coto, P.E. Building Systems Commissioning Engineer MBO, Inc. jorge@mbo1.com Brought to you by MBO, Inc. AGENDA. Link between water & energy Water Resource Management Wastewater Efficiency

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WATER + ENERGY

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  1. WATER+ENERGY Presented by: MBO, Inc.

  2. Your Speaker for Today Jorge Torres Coto, P.E. Building Systems Commissioning Engineer MBO, Inc. jorge@mbo1.com Brought to you by MBO, Inc.

  3. AGENDA Link between water & energy Water Resource Management Wastewater Efficiency Tools, Resources & Technologies Benchmarking Water Resources

  4. WATER SUPPLY LIFE CYCLE

  5. WATER + POWER GENERATION • Power generation requires 140 billion gallons of water per day • 40% of all freshwater in the nation • Power water = Agriculture water • Though only a small portion is used (3.3 billion gallons per day)‏ • Power water = thermal pollution • 30% increase in power demand by 2025 (mostly in southwest)‏

  6. REALITY: CHANGING OUR MINDSET • We need to change our mindset • The earth can survive without man, but man cannot survive without the earth • We do not own the earth and its resources, but we do own the responsibility to manage these resource so we do not threaten the earths survival and mankind's

  7. GREEN IS NOT A COLOR Global Responsible Environmental Educational Natural

  8. LINK BETWEEN WATER + ENERGY • Energy consumption in most water systems worldwide could be reduced by at least 25% • 7% of the total world’s energy consumption is used to provide water services • Less than 1% of the worlds fresh water supply is readily accessible • In the US 3% of the total energy consumption is used in the water and wastewater sector • CARBON + WATER FOOTPRINT ! BLUE = SURFACE OR GROUND GREEN = RAIN IN SOIL GREY = POLLUTED http://www.waterfootprint.org/?page=cal/waterfootprintcalculator_indv

  9. LINK BETWEEN WATER + ENERGY • The problem is not going away! • 40% population increase in 40 years • EFFICIENCY • Supply-side • Demand-side • Comprehensive • Ensuring supply side water efficiency helps municipalities maintain water supplies to a growing population • Water authorities benefit from: • Lower costs • Ensuring energy • Ensuring water security • Reducing environmental impacts

  10. WATER RESOURCE MANAGEMENT • Supply side issues • Leaks • Low c-value for pipes • Improper system layout • System over design • Incorrect equipment selections • Outdated equipment • Poor maintenance • Waste of usable water • Supply side solutions • Impeller trims • Leak & loss reductions • Equipment upgrades • Low friction piping • High efficiency pumps • Adjustable speed drives • Capacitors • Transformers • Maintenance & operation • Water reclamation & reuse

  11. WATER RESOURCE MANAGEMENT • Reducing the amount of water consumed and maintaining the end user's level of benefit can reduce the consumer's and the utility cost's • Reducing demand creates more capacity • The customer attains no additional value in using water inefficiently • Demand side programs can have an impact in one year, supply side programs can take years to implement • Saving water through efficiency costs 1/3 less than developing new capacity

  12. WASTE WATER EFFICIENCY • The treatment itself of water at accounts for 25 to 50 % of the total energy used by the WWT plant • Primary treatment is not energy intensive • Screening is good • Groundwater and rainwater control to limit flow and load • Secondary treatment is very energy intensive • Activated sludge is more energy intensive than attached growth type (medium sized plants)‏ • Agitation methods are important decisions. Fine bubble diffusers can be 25% more efficient than course bubble

  13. WASTE WATER EFFICIENCY • Improvement opportunities • Aeration control systems for optimization • Feasibility for oxidation ditch • Optimize water flow per operating hours • Reduce water in secondary sludge • Anaerobic and facultative pond systems do not use energy vs. 3-6 kW/m3 for aerated ponds • Analyze disinfection options • Chlorination • Ozonation • UV treatment

  14. WASTE WATER EFFICIENCY • Anaerobic digestion = methane production • Methane = heat + electricity • Larger flows + vertical drops = hydro power • Water reclamation • Water reuse • Water reclamation does not change the water used by the customer, it does save energy and treatment costs • THE BIGGEST HURDLE . . . SUBSIDIES • AN UNDERVALUED COMMODITY WILL BE A WASTED COMMODITY

  15. SANITARY & DOMESTIC USE • High Efficiency Toilets (HET)‏ • 1.6 gpf vs 0.8 gpf • Reduce potable water use • Reduce treatment of water • Low flow shower heads • 2.5 gpm vs 1.5 gpm • Reduce potable water use • Reduce DHW energy • Efficient faucet aerator • 2.5 gpm vs 0.5 gpm • Reduce potable water use • Reduce DHW energy

  16. SANITARY & DOMESTIC USE • Efficient Clothes Washers • Front vs top loading • 40 % less water • Reduce treatment of water • Xeriscaping • Drip irrigation • Rainwater harvesting • Condensate coil recovery • Cooling tower blow down adjustment and/or recovery • On-site water treatment plant

  17. SAMPLE WATER + ENERGY SAVINGS

  18. COMFORT COOLING & HEATING • Evaporation = 1% flow • 3.0 gpm / 100 T.R. • WBT : Fan RPM • WBT : water consumption • Evaporation : blowdown • WATER BALANCE: • M = E + B + D CONCENTRATION RATIO: • CR = MQUALITY / BQUALITY WATER SAVED • V = M x CRi - CRf (Crf)(CRF-1)‏ FEEDWATER WILL DICTATE CR

  19. NOVEL IDEAS • ADVANTAGES • Low capital & operating cost • Low maintenance • Low capital & operating cost • High CR • Higher CR • Reduced chemicals • Reduced scale • Reduced chemicals • Reduced water use • OPTION • Operational Improvements to control blowdown and chemicals • Sulfuric Acid • Ozonation • Magnets • Facility water reuse • DISADVANTAGES • None • Safety & Health • Corrosion • High capital cost • Complexity • Health • Controversial claims • Increased fouling • Lower CR

  20. COMFORT COOLING & HEATING

  21. COMFORT COOLING & HEATING • STEAM HEATING (& PROCESS)‏ • Inspect & Repair Steam Traps • 15% to 30% fail in first five years • Water losses and Energy losses • MINIMIZE BOILER BLOWDOWN • Typical 100k #/hr @ 150 psig • Reduce blowdown from 8% to 6% • Annual Fuel Saved = $23,007 • Annual Water + Chemicals = $9,714

  22. COMFORT COOLING & HEATING • CONDENSATE COIL RECOVERY‏ • 0.1 TO 0.3 GPH for every ton • In essence it is distilled water

  23. SAMPLE BUILDING WATER SYSTEM

  24. BENCHMARKING Understand the process & document it Find the best in class, worst & average What makes it good or bad Compare all to one another Rubber meets the road BENCHMARKING PROCESS

  25. BENCHMARKING

  26. BENCHMARKING

  27. AUDITING & TOOLS

  28. AUDITING & TOOLS

  29. AUDITING & TOOLS

  30. AUDITING & TOOLS

  31. AUDITING & TOOLS METERING IS YOUR BEST FRIEND YOU CANNOT FIX WHAT YOU CANNOT SEE PERMANENT METERS CAN BECOME O&M TOOLS AFTER AUDIT CONTINUE WITH MONITORING & VERIFICATION OF SUSTAINED MEASURES

  32. MY WATER FOOTPRINT http://www.waterfootprint.org/?page=cal/waterfootprintcalculator_indv

  33. TOOLS http://www.watergy.org

  34. TOOLS http://www.usgbc.org/DisplayPage.aspx?CMSPageID=1447

  35. TOOLS

  36. TOOLS

  37. TOOLS BASELINE CASE DESIGN CASE

  38. TOOLS

  39. THANK YOU • MBO, Inc. • 4619 Viewridge Avenue, Suite C • San Diego, CA 92071 • 858.751.0933 • jorge@mbo1.com

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