the roadmap to energy excellence - ca-nv awwa · eastern municipal water district the roadmap to...

EASTERN MUNICIPAL WATER DISTRICT

The Roadmap to Energy Excellence

Greg Kowalski, P.E.

Senior Civil Engineer

October 21, 2014

www.emwd.org 1

Co-authors:

Alan Zelenka, Kennedy/Jenks

Ryan Huston, P.E., Kennedy/Jenks

Luke Werner, P.E., Kennedy/Jenks

Joe Mouawad, P.E., EMWD

Agenda

• EMWD Background

• EMWD Products and Services

• Purpose of Energy Management Plan (EMP)

• Findings

• Recommendations

• Path Forward

www.emwd.org 2

• Established in 1950

• One of 26 MWD member agencies

• Unique agency, serving:

• Potable Water

• Wastewater

• Recycled Water

• Wholesale and retailwww.emwd.org 3

Service Area

www.emwd.org 4

• 542 square mile service area

• 768,000 service population

• Moreno Valley to Temecula

• Seven cities and unincorporated areas

• $225 Mil Annual Operating Budget

• 5-Member Board of Directors

Products and Services

• Potable Water: ~137,000 accounts

90,000 AF of fresh water sales per year

o Perris/Hemet Water Filtration Plant

o Menifee/Perris I Desalter

o Perris II Desalter (design)

o Groundwater Wells/Imported Water

• Wastewater: ~200,000 accounts

4 wastewater treatment plants

o Capacity: 56 MGD

o Currently treating: 46 MGD

• Recycled Water: 4th largest in California!

o EMWD treats 100% of wastewater generated

o 67% of effluent is sold for RW application

www.emwd.org 5

Hemet Water Filtration Plant

Perris I Desalter

Annual Energy Use and Cost

www.emwd.org 6

Electricity$13.0M78%

Natural Gas $2.6M16%

Fleet Fuel$1.1M

6%

Total $16.7M2014

Annual Electricity Use and Cost

www.emwd.org 7

Water$6,288,216

48%

Recycled Water$905,302

7%

Wastewater$5,407,328

42%

Raw Water $236,644 2%

Administration$143,404

1% Total $13.0M2014

Annual GHG Emissions by Category

www.emwd.org 8

Water17,713 MT

29%Recycled Water

2,816 MT4%

Wastewater35,522 MT

57%

Raw Water508 MT

1%

Administration5,304 MT

9%

Annual Greenhouse Gas Emissions by Category - 2011/2012 (MT CO2e)

Annual GHG Forecast

www.emwd.org 9

0

20,000,000

40,000,000

60,000,000

80,000,000

100,000,000

120,000,000

140,000,000

160,000,000

180,000,000

Bas

elin

e

20

13

20

14

20

15

20

16

20

17

20

18

20

19

20

20

20

21

20

22

20

23

20

24

20

25

20

26

20

27

20

28

20

29

20

30

20

31

20

32

GH

G (

MT

CO

2e

/Ye

ar)

Water Wastewater Recycled Water Raw Water Administration

Forecast of Energy Costs

www.emwd.org 10

$0.0

$10.0

$20.0

$30.0

$40.0

$50.0

$60.0C

ost

($

Mill

ion

/Ye

ar)

Electricity Natural Gas Fuel

$16.7M

$56.0M

Forecast of Energy Costs

www.emwd.org 11

$0.0

$10.0

$20.0

$30.0

$40.0

$50.0

$60.0

Co

st (

$ M

illio

n/Y

ear

)Total Energy Cost per Year

$16.7M

$56.0M

Purpose of an Energy Management Plan

• Strategic and comprehensive look at energy use and cost, as well as Green House Gas (GHG) emissions.

• Identify portfolio of potential projects to reduce the District’s existing and future energy use and costs; and thereby reduce GHG emissions and improve air emissions compliance.

• Advance the District’s strategic plan goal of net energy independence.

www.emwd.org 12

The Road Map

www.emwd.org 13

Project Management

1 Energy Baseline and Forecast

2Operational Audits• Derceto Analysis• PVRWRF Audits & Surplus Capacity• Perris WFP Audit• IC Engines (Assessment & Strategy)

3Project Reviews• Microturbines• Fuel Cells• Solar Facilities• FWTE • Biodiesel• Biosolids Dryer• Small Hydro 4 Evaluation & Prioritization

Energy Management

Plan

Planning Process

www.emwd.org 14

Baseline & Forecast

Operational Audits and Project Reviews

Scoring and Ranking

Portfolio and Sensitivity Analysis

Action Plan

Operational Audits and Project Reviews

Operational Audits:

A – Derceto System Audit

B.1 – PVRWRF Energy Audit

B.4 – Surplus Capacity Strategy

C – Perris WFP Energy Audit

D – IC Engines vs Electric Motors

www.emwd.org 15

Project Reviews:

A – Microturbines

B – Fuel Cells

C – Solar Facilities

D – Food Waste To Energy

E – Biodiesel

F – Biosolids Dryer

G – Small Hydro

30 Complete and Independent Projects Analyzed

Evaluation Criteria and Weighting

Weight

40

20

15

15

10

www.emwd.org 16

Criteria

1. Cost/Cost-Effectiveness

2. Alignment with Strategic Goals

3. Operational Impacts

4. Risk and Uncertainty

5. Environmental and Regulatory

Scoring and Ranking

www.emwd.org 17

8378 76 75 74 72

67

58 58 57 56 54 54 54 53 51 50 50 49 49 47 46 4642

29 27 25 25 25

0

10

20

30

40

50

60

70

80

90

100

PV

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RF

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it

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3 5 2 15 13 7 10 27 29 28 14 25 11 26 30 17 16 4 12 8 9 18 6 20 21 19 22 23 24

Sco

re

Short-List of Projects

www.emwd.org 18

Includes continuing to use Derceto and continue to operate existing Fuel Cells.

# Project Name Score Rank

3 PVRWRF Process Audit 83 1

5 Perris WFP Equipment and Process Audit 78 2

2 PVRWRF Equipment Audit 76 3

15 RWRFs Solar PV - Own and Operate (5 MW) 75 4

13 MV Fuel Cell - Optimization Project 74 5

7 IC Engines - Convert Only Cost-Effective 72 6

10 PVRWRF Microturbines (5) on Digester Gas 67 7

Portfolios

• Mix and Match Short-Listed Projects and Other Projects to Develop Portfolios

• Portfolios Represent Different Themes or Mixes of Projects

• Portfolio Comparison Matrix

• NPV of Cumulative Net Savings

• Average Annual Net Savings

• Capital Cost

• Electricity Generated or Saved

• Natural Gas Saved

• GHG Reductions

www.emwd.org 19

Preferred Portfolio

• Which Portfolio makes the most sense?

• Portfolio #7 because:

1. Highest NPV and Avg Annual Savings

2. Moderate Capital Costs

3. High Electricity Generated/Saved

4. Relatively High Natural Gas Savings

5. High GHG Reductions

www.emwd.org 20

Preferred Portfolio Projects

• IC Engine Conversion

• PVRWRF Equipment and Process Audit

• PWFP Equipment and Process Audit

• PVRWRF Microturbines (5 on Digester Gas)

• MVRWRF Fuel Cell – Improve Capacity Factor

• RWRFs - Solar PV: 5 MW Own and Operate

www.emwd.org 21

Includes continuing to use Derceto and continue to operate existing Fuel Cells.

IC Engine Conversion

• 59 Total Engines Running on Natural Gas

• 18 Decommissioned or in CIP to Convert

to Electric Motors (31%)

• 16 Cost-Effective to Convert (29%)

• 25 Not Cost-Effective to Convert (45%)

www.emwd.org 22

• Capital Cost = $3,293,000

• Incentive = $0

• Net Cost = $3,293,000

• Annual Electric Savings = -4,219,300 kWh

• Average Annual Net Savings = $308,700

• NPV of Cumulative Savings = $4,356,000

Overall IC Engine Conversion Benefits

• Improved reliability

• Standardized equipment

• Reduction in O&M costs

• More favorable cost competition

for capital equipment

• Reduction of GHG emissions

• Reduction of Air Quality

restrictions

• Safety

www.emwd.org 23

PVRWRF Process Audit

www.emwd.org 24

Recommended EEMs for Immediate Implementation

Priority EEM # Category Title

Avg Annual Net

Savings ($/Yr)

1 14 Digested and Solids Storage Digester Off-Line $67,730

2 17 Chlorination Chlorine Basin Cover $50,072

3 12 Secondary Clarifiers Remove Clarifier $37,026

4 16 Digested and Solids Storage Change Mixing Strategy - Dewatering $28,221

5 15 Digested and Solids Storage Change Mixing Strategy - Digester $22,577

6 11 Secondary Clarifiers Reduce RAS Rate $18,061

7 2 Raw Pumping Wet Well Level $7,526

11 other recommended EEMs

• Capital Cost = $10,500

• Incentive = $0

• Net Cost = $10,500

• Annual Electric Savings = 1,582,200 kWh



PVRWRF Equipment Audit

www.emwd.org 25

• Capital Cost = $1,965,000

• Incentive = $205,000

• Net Cost = $1,760,000




Recommended EEMs

EEM # Category Description

Avg Annual

Net Savings

($/Yr)

1 Lighting Install lighting controls in all unoccupied spaces. Best Practice

2a Lighting Replace Interior Lighting with higher efficiency lighting systems $2,465

2b Lighting Replace Exterior Lighting with higher efficiency lighting systems $10,087

3 HVAC Lock temperature range of HVAC systems TBD

4 HVAC Provide an alternative HVAC system for main control room instead of heat pump TBD

7 Plug Load Remove all portable space heaters Best Practice

8 Plug Load Replace microwave above sink made in 1992 with a microwave/convection system Best Practice

9 Process Replace computers and monitors with Energy Star equipment at end of life Best Practice

10 Operational Reduce ramp response of Turblex blowers during blowdown cycles. TBD

11 Operational Replace Turblex blower with Neuros blower $45,511

12 Operational Route aeration system blowdown to the blower building exterior TBD

15 Operational Enroll in SCE pump optimization program $122,792

PWFP Equipment and Process Audit

www.emwd.org 26

• Capital Cost = $462,000

• Incentive = $42,000

• Net Cost = $420,000

• Annual Electric Savings = 458,400 kWh


• NPV of Cumulative Savings = $930,000

List of Recommended EEMsEEM

#

Category Title Avg Annual Net

Savings ($/Yr)

1 Lighting Lighting – Interior $8,546

2 Lighting Occupancy Sensor - Bathrooms & Kitchen Best Practice

3b Lighting Occupancy Sensor - Finish Water Building Best Practice

4 Lighting Lighting - Exterior LED $11,787

5 Lighting Lighting - Delamp Control Room (per fixture) Best Practice

7 Plug Load New Appliances (Refrigerator) Best Practice

10 Process Pump Efficiency $42,782

16 Process TOU Analysis TBD

17 Process Managing Overproduction Ops Change

18 Process Off-Spec Water Ops Change

19 Process Wet Well Level $12,528

Solar PV – Own and Operate

• Up to five 1 MW Solar PV Projects (5 MW)

• EMWD Own and Operate

• Offset Load at RWRFs

• CSI Reservation Obtained

www.emwd.org 27

• Capital Cost = $25,091,000

• Incentive = $5,051,000

• Net Cost = $20,040,000




Summary Results

www.emwd.org 28

Average Annual Net Savings $1.2 Million/Year

Net Present Value (NPV) of Average Annual Net Savings $17.9 Million

Cumulative Total Net Savings by 2033 $24.2 Million

Average Annual Electricity Generation/Savings 10.2 Million kWh/Year

Total Electricity Generation/Savings by 2033 203.1 Million kWh

Annual Reduction in GHG Emissions 4,940 MT CO2/Year

Total Reductions in GHG Emissions by 2033 97,990 MT CO2

~1,000

Cars

~1,500

Homes

Sensitivity Analysis

• Provides guidance in responding to future changes in

regulatory, political or economic environment

• Scenarios/Sensitivities:

1. Electric Cost

2. Natural Gas Cost

3. GHG Fee

4. Discount Rate

5. Bond Interest Rate

www.emwd.org 29

Sensitivity - Electric Rates

$0.0

$4.0

$8.0

$12.0

$16.0

$20.0

$24.0

Preferred PortfolioEscalator = 4%

Lower Electricity PriceEscalator = 2%

Higher Electricity PriceEscalator = 6%

$17.9

$14.2

$22.6

NP

V o

f A

nn

ual

Net

Sav

ings

(M

illio

ns

$)

www.emwd.org 30

Sensitivity Analysis - Conclusions

• Some scenarios reduce the Preferred Portfolio’s savings

• In all scenarios the Preferred Portfolio remains cost-effective

• Robust Plan under these future scenarios

www.emwd.org 31

Implementation Plan

www.emwd.org 32

Project Status

PVRWRF Process OptimizationInitiated and Partially

Implemented

IC Engines – Convert Cost-Effective Only Initiated (Phase 1)

PWFP Equipment and Process OptimizationInitiated and Partially

Implemented

PVRWRF Microturbines (5) Initiated

PVRWRF Equipment OptimizationInitiated and Partially

Implemented

Solar PV – Own & Operate (5MW) Initiated

MV Fuel Cell Optimization Initiated

Thank you for your time!

Questions?

www.emwd.org 33

Contact Information

EASTERN MUNICIPAL WATER DISTRICT

Greg Kowalski, P.E.

Senior Civil Engineer

Eastern Municipal Water District

951.928.3777 ext. 4466

[email protected]

www.emwd.org 34

Alan Zelenka

Energy Services Practice Leader

Kennedy/Jenks Consultants

(541) 844-7812

[email protected]

mailto:[email protected]

mailto:[email protected]

the roadmap to energy excellence - ca-nv awwa · eastern municipal water district the roadmap to...

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