water + energy presented by: mbo, inc.. your speaker for today jorge torres coto, p.e. building...

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

1. Link between water & energy

2. Water Resource Management

3. Wastewater Efficiency

4. Tools, Resources & Technologies

5. Benchmarking Water Resources

WATER SUPPLY LIFE CYCLE

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)

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

GREEN IS NOT A COLOR

Global

Responsible

Environmental

Educational

Natural

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 !

LINK BETWEEN WATER + ENERGY

http://www.waterfootprint.org/?page=cal/waterfootprintcalculator_indv

BLUE = SURFACE OR GROUNDGREEN = RAIN IN SOILGREY = POLLUTED

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

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Outdated equipment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

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

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

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

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

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

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

SAMPLE WATER + ENERGY SAVINGS

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

NOVEL IDEAS

OPTION

Operational Improvements to control blowdown and chemicals

Sulfuric Acid

Ozonation

Magnets

Facility water reuse

ADVANTAGES

Low capital & operating cost

Low maintenance

Low capital & operating cost

High CR

Higher CR Reduced chemicals

Reduced scale Reduced chemicals

Reduced water use

DISADVANTAGES

None

Safety & Health Corrosion

High capital cost Complexity Health

Controversial claims

Increased fouling Lower CR

COMFORT COOLING & HEATING

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

COMFORT COOLING & HEATING

CONDENSATE COIL RECOVERY 0.1 TO 0.3 GPH for every ton

In essence it is distilled water

SAMPLE BUILDING WATER SYSTEM

BENCHMARKING

BENCHMARKING

PROCESS

1. Understand the process & document it

2. Find the best in class, worst & average

3. What makes it good or bad

4. Compare all to one another

5. Rubber meets the road

BENCHMARKING

BENCHMARKING

AUDITING & TOOLS

AUDITING & TOOLS

AUDITING & TOOLS

AUDITING & TOOLS

AUDITING & TOOLS

1. METERING IS YOUR BEST FRIEND

2. YOU CANNOT FIX WHAT YOU CANNOT SEE

3. PERMANENT METERS CAN BECOME O&M TOOLS

4. AFTER AUDIT CONTINUE WITH MONITORING & VERIFICATION OF SUSTAINED MEASURES

MY WATER FOOTPRINT

Y our total water footprint

= 3048

cubic m eter per year

Co m po ne nts o f yo ur to ta l w a te r fo o tprin t

824

258

1965

3048 Fo o d Do m e stic I ndustria l T o ta l

Co ntributio n o f ind ividua l fo o d ca te go ry to w a rds the to ta l w a te r fo o tprin t

31

554

16

22

72

14

0

25

8

71

ce re a l m e a t ve ge ta b le fru i t da i ry Stim ula nt Fa t suga r e gg Othe rs

http://www.waterfootprint.org/?page=cal/waterfootprintcalculator_indv

TOOLS

http://www.watergy.org

TOOLS

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

TOOLS

TOOLS

TOOLSBASELINE CASE DESIGN CASE

TOOLS

MBO, Inc.4619 Viewridge Avenue, Suite C

San Diego, CA 92071858.751.0933

jorge@mbo1.com

THANK YOU