energy management planning for small water systems workshop one... · energy management planning...

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Energy Management Planning for

Small Water Systems www.efcnetwork.org

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About the Environmental Finance Center Network (EFCN)

The Environmental Finance Center Network (EFCN) is a university-based

organization creating innovative solutions to the difficult how-to-pay issues of

environmental protection and improvement. The EFCN works with the public

and private sectors to promote sustainable environmental solutions while

bolstering efforts to manage costs.

This program is offered free of charge to all who are interested. The Project

Team will conduct activities in every state, territory, and the Navajo Nation.

All small drinking water systems are eligible to receive free training and

technical assistance.

The Smart Management for Small Water Systems Program

What We Offer

Individualized technical assistance, workshops, small group support,

webinars, eLearning, online tools & resources

www.efcnetwork.org

Who We Are

• Environmental Finance Center at University of Louisville

• Environmental Finance Center at University of Maryland, College Park

• Environmental Finance Center at University of North Carolina at Chapel Hill

• Environmental Finance Center at Wichita State University

• EFC West

• Great Lakes Environmental Finance Center at Cleveland State University

• New England Environmental Finance Center at University of Southern Maine

• Southwest Environmental Finance Center

• Syracuse University Environmental Finance Center

www.efcnetwork.org www.efcnetwork.org

10/22/2015

Dedicated to enhancing the ability of governments and other organizations to provide environmental programs and services in fair, effective, and financially sustainable ways through:

• Applied Research

• Teaching and Outreach

• Program Design and Evaluation

How you pay for it matters

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• Asset Management

• Energy Use and Efficiency

• Meeting Regulatory Compliance

• Fiscal Planning and Rate Setting

• Multi-funding Coordination

• Communications and Decision-making

• Water Loss Reduction

• Working with Other Water Systems

• Financing

• Funding Programs

• Managing Small Utilities in Drought

Areas of Expertise


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Energy Management Workshop Series

• In-depth workshop focused on building system-specific energy management plans

– Workshop 1: Collecting data and getting started (Tuesday April 21st)

– Workshop 2: Prioritizing and funding projects (Thursday May 28th)


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Workshop 1 Agenda Start Time Topic

9am Welcome and Introductions

10:00 Break

10:15 Why Are We Here?

11:00 Understanding Your Energy Bill

12pm Lunch (On Your Own)

1pm Developing and Comparing Your Baseline

2:15 Break

2:30 Review of Energy Assessments

3:00 High Impact Projects

3:45 Close-Out and Homework

4:00 End Day


WHY ARE WE HERE? Energy Management Workshop 1

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Electricity Prices in the States

Source: US Energy Information Administration, http://www.eia.gov/electricity/monthly/epm_table_grapher.cfm?t=epmt_5_6_a


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Why so high? According to WAPA

• Dependence on expensive fuel oil

– Recent transition to propane for base load has reduced costs

• Limitation on integrating renewables

– Maximize development of renewables (solar, wind, biomass, and ocean thermal)

• Lack of economies of scale

– Interconnection with Puerto Rico

• Spinning reserve

• Limited financial resources

– Increase efficiency and plants

• Environmental regulations

• Community acceptance

Source: WAPA’s Energy Production Action Plan,

September 2012


Smart Management for Small Water Systems

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Energy Projections in USVI

Source: NREL, Energy Development in Island Nations, USVI Energy Road Map: Charting the Course to a Clean Energy Future.



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Potential of Clean Energy in

USVI

Source: NREL, Energy Development in Island Nations, USVI Energy Road Map: Charting the Course to a Clean Energy Future.


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Why does the EPA want you here?

• Energy represents the largest controllable costs of providing water to the public

• Help water systems meet regulatory requirements to protect public health and the environment


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Energy Management Goals

• Improve energy efficiency & manage total energy consumption

• Control peak demand for energy

• Manage energy cost volatility

• Improve energy reliability


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Improve Efficiency & Manage Total Consumption

• Cost of electricity is based on two main components

– Quantity of electricity used (kWh)

– Demand for electricity (kW)

• On-peak vs. off-peak consumption affects rates

• Understanding the electric utility’s pricing policies (rate structures) is critically important


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Control Peak Demand for Energy • Electric utilities typically include a “demand charge” in their rate

structure

• Lower variability in electric demand over time (flattened demand curve)

– Minimize changes in peak demand throughout the course of a billing period

– Shifting loads from peak periods, typically during daylight hours, to off-peak periods

• Potential for significant cost savings by minimizing demand charges


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Manage Energy Cost Volatility

• Energy costs fluctuate

• Dramatic changes stress budgets

• Protect against volatility as much as possible

– Reducing need for energy

– Long-term procurement of energy

– Provisions for alternative energy sources

– On-site generation of energy


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Improve Energy Reliability

• Water utilities should be able to provide critical systems with adequate backup power

• Energy planning process should identify opportunities to improve energy reliability

– Protection against complete loss

– Identify changes in power quality that can damage equipment and/or

– Institute operating procedures to address changes in overall power availability


EXERCISE: ASSESSING ENERGY MANAGEMENT SYSTEMS FOR BEST PRACTICES


ENERGY MANAGEMENT PROGRAM DEVELOPMENT

Energy Management Workshop 1


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Energy Management Program - Basic Steps

• Step 1. Establish Organizational Commitment • Step 2. Develop a Baseline of Energy Use • Step 3. Evaluate the System and Collect Data • Step 4. Identify Energy Efficiency Opportunities • Step 5. Prioritize Opportunities for Implementation • Step 6. Develop an Implementation Plan • Step 7. Provide for Progress Tracking and Reporting

Source: NYSERDA


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Step 1 – Establish Organizational Commitment

• Is your team defined? Is your team diverse?

• Does it represent various interests and responsibilities within the facility? (Owner, operators, users?)

• Team responsibilities include: develop the plan, establish goals, define the resources needed, provide information to others (i.e. CIP team)


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Why bother?

• Without the commitment of several individuals at varying levels within your utility, successful implementation of an energy management plan will be difficult

• Think of The Avengers – no one individual could have saved the city; it took all of them working towards a common goal to be successful!


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Step 2 - Developing An Energy Baseline – What Should You Do?

• Gather basic information

– One year of data minimum

– Examples: utility billing records, O&M records, equipment or motor lists (horsepower & load)

• Organize treatment processes by functional area

• Evaluate energy bills and understand the energy rate structure


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Developing An Energy Baseline – What Else Should You Do?

• Review facility use data and compare it to energy use

– Identify wet weather, seasonal patterns

• Build a basic ‘model’ to organize data, and capture energy use patterns

• Create basic graphics and reports to communicate initial findings


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Why bother?

• Energy efficiency gains = $$ saved

– The process of investigating energy use, and improving awareness among staff, can provide measurable energy efficiency gains on the order of 3-5%.

• Value shown before resources committed

– Successfully developing a basic understanding of energy use can be a good ‘early victory’, allowing the team to demonstrate some value even before any significant resources are committed to the program.


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Step 3- Evaluate the System and Collect Data

• This step goes beyond the baseline development (historical records). It involves data collection in the field

– System walk-through (note operational information, motor sizes, etc.)

– Staff interviews (operational practices, maintenance practices/history, take suggestions)

– Energy performance data (field data from direct measurements, average equipment run time, sub-metering, etc.)


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Step 4: Identify Energy Efficiency Opportunities

• Energy efficiency opportunities can be defined as any system change that helps to reach a stated energy management goal.

• At this stage the energy management team should identify a broad array of energy efficiency opportunities


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Categories for Energy Efficiency Opportunities

• Capital program or equipment replacement

• Process change

• Operational change

• Automation or controls

• Maintenance improvements

• Business measures


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Step 5: Prioritize Opportunities for Implementation

• The final product of this step is a short list of energy efficiency opportunities that have been selected and carefully evaluated out of the list of opportunities generated in the previous step

• Identify a consistent method to compare and rank opportunities (consider both the monetary and non-monetary)


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Keys to Success

• Convert all energy efficiency opportunities characteristics two monetary terms whenever possible.

• Evaluate all energy management, including ancillary benefits when possible.

• Test the sensitivity of results to determine the impact of important assumptions (e.g. time horizons)

• Make sure that the final results make sense in terms of the utility’s capabilities.


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Step 6: Develop an Implementation Plan

• How to Do It – Business Plan • Actions required in this step include the following:

– List the projects chosen for implementation and describe the goals and objectives of the program

– Explain the resources needed, including a budget and financing plan – Develop any specifications needed, including design criteria and

procurement related documents – Provide any changes in standard operating procedures, and/or process

control strategies – Set the schedule for implementation, including milestones and gaining

the necessary regulatory approvals (if applicable) – Set realistic expectations for the project in terms of resources

required, schedule, procurement time frame, and expected results


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Step 7: Provide for Progress Tracking and Reporting

• The success of a project should be measured as it is being implemented

• The specific actions required in this step include the following:

– Assign the responsibility for tracking the progress of a project and reporting on that progress. Allocate the resources necessary to fulfill the responsibilities.

– Set the performance metrics that will be used.

– Create a communication plan. Identify who needs to be included in progress reports (examples: elected officials, public, etc.), when reports should be made, and any actions that need to occur in response to reports.


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Constraints on Implementing an Energy Program


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Constraints on Implementing an Energy Program

• Organizational constraints

• Capital costs

• Process reliability

• Regulatory requirements and limits

• O&M capabilities, and non-energy O&M costs

• Engineering constraints

• Space availability


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It doesn’t have to be all or nothing!

Source: DOE’s Advanced Energy Retrofit Guide for K-12 Schools


UNDERSTANDING YOUR ENERGY BILL

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WAPA Rate Classes

Commercial • Customer charge

• Demand charge

• Surcharges

– Line loss

– Maintenance

– OPEB

– PILOT

– Insurance

• Decreasing block rate energy

charge

• Fuel charge

Large Power • Customer charge

• Surcharges

– Line loss

– Maintenance

– OPEB

– PILOT

– Insurance

• Uniform rate energy

charge

• Fuel charge

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Curtailable Large Power Rates

• Difference between large power and curtailable large power

• Designated load identified as curtailable and credited $2.22/kW per month

• Monthly customer charge is higher

• Subject to a minimum demand of 500 kW (versus 25 kW for LPS customers)

Source: Testimony of Bruce Oliver to Public Service Commission: http://www.psc.gov.vi/Docket_612-613/Docket%20612%20-%20Electric/Direct%20Testimony%20of%20Bruce%20Oliver%20-%20Electric.pdf

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• Funds administrative costs of providing

service to the customer – charged on a

per meter basis

Customer Charge

Commercial Large Power Curtailable Large Power

Single Phase: $6.33 Triple Phase: $12.65

$48.67 $131.70

*Per WAPA’s website, effective 1/1/14

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Demand Charges (billed per

kW) • Measured in kilowatts (kW), a measurement of

power demanded at a given instant in time.

• There are no “demand ratchets” in this rate structure,

where you can get “stuck” with paying for a peak of

demand for a long while, such as an entire year.

Commercial Large Power Curtailable Large Power

NA $1.95/kW -reduced rate (practically covers entire rate)

*Per WAPA’s website, effective 1/1/14


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kWh – like odometer kW – like speedometer

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• Line loss – funds projects geared towards

reducing line loss in the electric system

– $0.002196/kWh (Commercial & Large Power)

• Maintenance - Funds earmarked for ongoing

repairs, maintenance, and upgrades to

VIWAPA’s electric utility system


Surcharges (billed on kWh)

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• OPEB – Other Post-Employment Benefits


• PILOT – Payment in Lieu of Taxes to V.I.

Government

– $0.000686/kWh (Commercial and Large Power)

• INS – Covers the cost for WAPA to self-insure


Surcharges (billed on kWh)

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• Energy charge– funds the cost for

producing and delivering electricity plus

investment in the power plants and

facilities

– Commercial: Uniform Rate at

$0.103832/kWh

– Large Power: Decreasing Block Rate

Consumption Charges


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Large Power Decreasing Block Rate


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Fuel Charge

• Fuel charge – cost of fuel consumption collected from customers and paid directly to fuel supplier




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The dominance

of the fuel charge

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Fuel charge variability over 2014

$0.30

$0.32

$0.34

$0.36

$0.38

$0.40

$0.42

$0.44

Fue

l Ch

arge

(p

er

KW

h)

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• Consumption charge: $21.05/thousand

gallons

• Fuel charge: varies

– $7.10 to $12.10/kgal

• Line loss surcharge: $0.72/thousand

gallons

WAPA Water Rates



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Breakdown of Fuel Charge Rate


STEP 2- DEVELOPING A BASELINE OF ENERGY USE

Energy Management Workshop 1


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The Value of Benchmarking

Consistent benchmarking in buildings results in energy savings and improved performance.

54

Source: http://www.energystar.gov/ia/business/downloads/datatrends/DataTrends_Savings_20121002.pdf?8d81-8322

http://www.energystar.gov/ia/business/downloads/datatrends/DataTrends_Savings_20121002.pdf?8d81-8322





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Building a Basic Baseline

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Data Needs

• Bill Date

• Customer Charge

• Electric Use

• Electric Charge

• Demand

• Demand Charge

• Meter Usage Metric and

Measurement

Inputs • Average cost per kWh

• Average cost per day

• Average use per day

• Demand charges as a

percent of total bill

• Energy use intensity

Calculations


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Common Energy Use Intensity (EUI) Metrics

Metric Application

Btu/ft2 Any building

Btu/employee Office building

Btu/unit of product Assembly plant

Btu/lb of product Manufacturer

Btu/number of beds occupied Hotel or hospital

kWh/ft2 Lighting

kWh/ton Chilled water efficiency

W/ft2 airflow/min HVAC systems


EXAMPLE BASELINE


BASELINE EXERCISE


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Think – Pair - Share

• What are your seasonal trends?

• Can you see changes in operations?

• How do changes in price compare to changes in energy use?

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ENERGY STAR Commercial Buildings Program

• Offers a strategic approach to energy management

• Enables building owners, managers, and tenants to save money & protect the environment

• Provides organizations with measurable information on energy savings and greenhouse gas emissions reductions from commercial buildings

• Builds on strong ENERGY STAR brand recognition

• ENERGY STAR on a building = Superior Energy Performance

• Benchmarking is the first step

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Want to do more?

www.efcnetwork.org 62

• ENERGY STAR Portfolio Manager is an effective management tool – it helps business and organizations by offering a platform to:

– Assess whole property energy and water consumption

– Track changes in energy, water, greenhouse gas emissions, and cost over time

– Track green power purchase

– Share/report data with others

– Create custom reports

www.energystar.gov/benchmark

http://www.energystar.gov/benchmark

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• Portfolio Manager is also a metrics calculator – it provides key performance metrics to integrate into a strategic management plan.

– Energy consumption (source, site, weather normalized)

– Water consumption (indoor, outdoor)

– Greenhouse gas emissions (indirect, direct, total, avoided)

– ENERGY STAR 1-to-100 score (available for many building types and wastewater treatment plants)

– Compare to national median energy use intensity (site, source)

– Compare baseline year vs. current year (energy, water, ghg)

www.energystar.gov/benchmark

http://www.energystar.gov/benchmark

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Understand Comparative Performance

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• ALL buildings can be benchmarked

• Benchmarking through Portfolio Manager enables you to:

– Compare one building against a national sample of similar buildings

– Compare all of your buildings of a similar type to each other

– Set priorities and targets for the use of limited staff time and/or investment capital

– Track performance over time and gain recognition


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To Get Started Benchmarking in Portfolio Manager

• Helpful data to have on hand

– Property Information

• Function

• Name, street address, ZIP/postal code

– Property type data

• Gross floor area

• Use details (ex. weekly operating hours, number of computers, number of workers on the main shift, etc)

– Energy consumption data

• Property-specific invoice information from all purchased and on-site generated energy for all fuel types

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• Hotels

• K-12 Schools

• Enclosed Mall

• Senior Care Facility

• Multi-family Housing

Portfolio Manager


EXERCISE: SET UP PORTFOLIO MANAGER ACCOUNT (IF TIME AND INTERNET ALLOW)


REVIEW OF ENERGY ASSESSMENTS


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Source: NRAL Advanced Energy Retrofit Guide – K-12 Schools


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Review of Your Energy Assessments

• Assets – Primarily associated with drinking water system

• Nameplate Horsepower (HP)

• Variable Speed – for motors

• Calculated Power Consumption = Horsepower x 0.746 (conversion factor)


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• Hours of Operation per Year – Either based on observation or staff report

• Total kWh per Year – Calculated power consumption x Hours of operation per year

• Average Run Time - Either based on observation or staff report

• Design Specs – Based on observation (HP and head) or staff report


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• Operating Status – Based on observation or staff report

• Average Cost – Based on current WAPA rates

• Total Cost = Total kWh per year x Average cost

• Cost per MG = Total cost/Total flow (Total flow based on estimates)

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Source and Treatment of Water Systems Indoor – Primary Indoor – Secondary

Other Source Treatment Source Treatment

Lovenlund Apartments

Rainwater catchment

Blended with R.O. water

Groundwater well

Bag filtration and R.O.

Gray water effluent for toilet flushing

Cowpet Bay Village – West

Rainwater catchment

Chlorine and U.V.

Brackish groundwater well

Bag filtration and R.O.

Gray water effluent for toilet flushing and irrigation

Wesleyan Academy

Rainwater catchment

Chlorine and point-of-use filters

WAPA purchase Drinking water from water coolers

VI Montessori School

Rainwater catchment

Ultra-Violet Water trucks and wells

WWTP effluent used for landscape irrigation; Groundwater well for irrigation; Run-off collected for irrigation

Tutu Park Mall Groundwater well

Bag filters and R.O. and UV

WAPA Purchase

R.O.

Seaview Nursing Home

Rainwater catchment

Chlorine and point-of-use filters

Water trucks Chlorine and point-of-use filters

Plantation Manor

Rainwater catchment

Chlorine and cartridge filter

Water trucks Chlorine and cartridge filter

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Energy Use of Treatment

• Electricity consumption for water treatment can range from 0.05 to 0.7 kWh per m3 dependent on initial water quality and treatment technique.

Source: Lawson et. al, The Effects of Water-Energy Nexus on Potable Water Supplies in Potable Water, The Handbook of Environmental Chemistry. 2014.

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Approximate Energy Use of Water Treatment Technology

0

0.5

1

1.5

2

2.5

3

Ene

rgy

Inte

nsi

ty (

kWh

m-3

)

Maximum

Minimum

Source: Lawson et. al, The Effects of Water-Energy Nexus on Potable Water Supplies in Potable Water, The Handbook of Environmental Chemistry. 2014.

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Questions to consider when reviewing your assessment?

• Compare internal to external costs

• Are you using your lowest cost water first for drinking? (Hint: It’s rain water)

• Maximize your use of rain water with water efficiency

• Important to meter

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Other Major Energy Uses

Lovenlund Apartments

Outdoor lighting, high-use plumbing

Cowpet Bay Village – West

Wastewater treatment plan

Wesleyan Academy Computer lab

VI Montessori School

Air conditioning, drinking fountains

Tutu Park Mall Parking lot lighting, laundry facility, air conditioning

Seaview Nursing Home

Window air conditioning, outdoor lighting, high-use plumbing, laundry facility, kitchen

Plantation Manor Laundry facility, air conditioning


HIGH IMPACT PROJECTS


WHAT ARE SOME OF YOUR HIGHEST IMPACT PROJECTS?


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High Impact Project Ideas

• Reduce Cooling Load

• Water Conservation

• Landscape Efficiency

• Motor Efficiency

• Wastewater Treatment Efficiency

• Reduce Lighting Demand


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Factors that Influence Your Cooling Needs

• Outdoor temperature

• Desired temperature

• Square footage

• Insulation

• Kitchen (or boiler, particularly if active during cooling times)

• Direct Sunlight

• Number of occupants

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Reduce Cooling Load

Right- Sizing Your Cooling System Residential Light commercial Large commercial

Single-phase unitary Three-phase

Cooling capacity: 65,000 Btu/hr or less

135,000 Btu/hr >135,000 Btu/hr and <240,000 Btu/hr

Designed specifically for residential applications

Small businesses and commercial properties

Oversized system: higher initial costs, reduced efficiency, short-cycling > poor humidity control, increased fan speeds > increased duct leakage

Oversized system: ineffective, hard on system

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Options to Reduce Cooling Load - Equipment

• Natural Gas/Diesel Absorption Cooling System

– 45% over air cooled

• Chilled Beams

– 80% fan motor savings achieved

• High Efficiency AC

– Variable Refrigerant Volume

– Heat Recovery

• Zoning


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Equipment Rating • Seasonal Energy Efficiency Ratio (SEER) – measure of

equipment energy efficiency over the cooling season (<65,000 Btu/hr)

• Energy Efficiency Ratio (EER) – measure of efficiency in the cooling mode that represents the ratio of total cooling capacity (Btu/h) to electrical energy input (Watts).

• Integrated Energy Efficiency Ratio (IEER) – cooling part-load EER efficiency for commercial unitary air-conditioning and heat pump equipment on the basis of weighted operation at various load capacities



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EnergySTAR Cooling Products

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Options to Reduce Cooling Load - Design

• Building envelope –Increase insulation

• Window insulation – Double-pane and Low-e

Image source: NREL


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Bjerget House, St. Croix, USVI

• 182 year old historic property, including: • One three-story main house, • One three-floor east building, and • Three single-story utility buildings • 10,000 sq. ft. in total

• Sources:

• Steve Garner of TropiTech, Inc.

• Nora Barger of SEEA / WISE.

• http://stcroixsource.com/content/news/local-news/2012/06/12/bjerget-house-gets-greener-energy-overhaul

http://stcroixsource.com/content/news/local-news/2012/06/12/bjerget-house-gets-greener-energy-overhaul















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Bjerget House

– HVAC improvements

• Highly efficient variable refrigerant flow system with an inverter driven compressor

• Zoning

– Window film improvements

– Lighting improvements


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Bjerget House

• Annual Savings:

• 161,080 kWh

• $75,709

• 3.05 years (for simple payback)


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Barriers to Improved Cooling Efficiency

• High up-front costs

• Split incentives between building owners and tenants

• Energy efficiency not reflected in appraised value

• Just-in-time replacement

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10/22/2015

No-to-Low Cost Projects

• Inspect cooling equipment

• Test AHUs

• Maintain economizers

• Inspect and clean coils

• Inspect and clean fans

• Replace air filters

• Inspect air ducts

• Maintain controls


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Water Conservation

• Save on

– Energy required to pump and treat water

– Energy required to treat wastewater

– Need to purchase expense water


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Use Less Water


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Use Less Water • Proximity Hotel, Greensboro, NC:

• Water usage has been reduced by 33% by installing high-efficiency Kohler plumbing fixtures, saving two million gallons of water the first year.

• http://www.proximityhotel.com/green.htm

http://www.proximityhotel.com/green.htm


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Use Less Water • Treasure Beach Hotel, Barbados

– To reduce water use by 10%, the hotel adopted the following measures.

– Flow diverters and toilet dams. – Low flow showerheads and faucet aerators. – Sub meters for kitchen and irrigation. – Daily meter readings. – Water hoses fitted with control nozzles. – Drip irrigation system controlled by a timer and a

moisture probe. – Towel and linen reuse program. – http://www.caribbeanhotelandtourism.com/downloads/CHTAEF_WaterConservation.pdf

http://www.caribbeanhotelandtourism.com/downloads/CHTAEF_WaterConservation.pdf

http://www.caribbeanhotelandtourism.com/downloads/CHTAEF_WaterConservation.pdf


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Water Conservation

• How old are your fixtures?

Fixture Pre-1994 Post-1994 WaterSense

Toilets 3.5 gpf 1.6 gpf 1.28 gpf

Urinals 1.5 gpf 1.0 gpf 0-0.5 gpf

Showerheads 2.75 gpm 2.5 gpm 2.0 gpm

Faucets 2.75 gpm 2.2 gpm 1.5 gpm


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Use Less Water

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Laundromats: Case Study San Antonio Westin Hotel

• High efficiency equipment = 45% water savings

• Last-rinse, first-wash reclaim = 20% in water savings

Overall water use reduced from 2.82 gallons per pound to 0.99 per pound



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Use Less Water

• A case study of a Seffner, FL high school: – Could save 4+ million gallons of water/year

– Equates to 22% of its annual water use

• Low-flush toilets: 790 kgal and $6,100

• Cooling adjustments: 60 kgal and $150

• Irrigation changes: 3,100 kgal and $7,600

http://www.swfwmd.state.fl.us/conservation/waterwork/




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Landscape Irrigation Efficiency

• High-efficiency irrigation system

– Drip irrigation

– Moisture probe

• Use reclaimed water – Let’s hear from the experts

– YOU

• Use of native plants

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Non-native, High Water Use Native, Drought Tolerant

Morgan, Michael and Thomas Zimmerman. Evaluating Drought Tolerance of VI Native Trees Suitable for Landscaping. 2013

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Motor Efficiency

• Various options

– Premium Efficient Motors

• Lower losses result in cooler motors

• Manufactured to closer tolerances (Better balance/bearing life)

• Most motors are supplied with polyurea-based grease

– Adjustable Speed Motors (Variable Frequency Drive)

– The “right size” matters

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Variable Frequency Drive Motors


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The Villa Magna condos, Highland Beach, FL

• A 92-unit luxury condominium complex. Source: http://www.pump-zone.com/topics/motors/motors-drives-improve-high-rise-condo-efficiency

http://www.pump-zone.com/topics/motors/motors-drives-improve-high-rise-condo-efficiency


















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Villa Magna condos: VSDs

By using drives to control the domestic water system in the high-rise building, residents now have constant water pressure despite usage.

Ten-horsepower variable speed motors

controlled by drives were selected for

the system to maintain constant water

pressure under different flow rates.


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Improve Energy Efficiency, Example 1

• Replaced fixed speed pump motors with variable speed drives and motors

• Installed solar panels, heat pumps, energy efficient lighting and appliances

• Pumping system is now more reliable

• Significant savings on electricity and water


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Villa Magna condos: Results

• Saving about $2,000 per month on their water bill.

• And have saved $24,000 on electricity across the past year.


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Manage Motor Inventory • Plan Ahead! When a motor goes out is not the time to decide

which one you need

• Resources

– Department of Energy’s MotorMaster+

• Software tool to help you compare and understand motor decisions

– Motor Decisions Matter: http://www.motorsmatter.org

• Motor Planning Kit

• Simple Savings Spreadsheet

http://www.motorsmatter.org/




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Wastewater Treatment

• Variable Blower Air Flow Rate: Require that aeration system and aerobic digester blowers have variable air supply rate capability • 15-50% reduction in energy use

• Dissolved Oxygen Control: Dissolved oxygen monitoring and control technology

– 20-50% reduction in energy use

www.efcnetwork.org

Reduce Lighting Demand

• Hardware

– LEDs

– Fluorescents

– Motion sensors

• Operations

– Clean

– Check light levels

– Establishing a

group relamping

program

– Inspect controls

www.efcnetwork.org

LED Lighting at Cree (Indoor and Outdoor)

• 49% reduction in energy

use = $160,000 energy

savings per year

• Maintenance costs

reduced

• Improved lighting quality

> improved morale

• Uniform, shadow-free

light > enhanced security

www.efcnetwork.org

10/22/2015

Other Low-Cost Energy Saving Options

• Timers and occupancy sensors

• Power strips

• Generator “exercise” timing


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Renewable Energy

• Solar PV

• Solar Water Heating

• Wind



www.efcnetwork.org

10/22/2015


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Energy Management Program - Basic Steps

• Step 1. Establish Organizational Commitment • Step 2. Develop a Baseline of Energy Use • Step 3. Evaluate the System and Collect Data • Step 4. Identify Energy Efficiency Opportunities • Step 5. Prioritize Opportunities for Implementation • Step 6. Develop an Implementation Plan • Step 7. Provide for Progress Tracking and Reporting

Source: NYSERDA


10/22/2015

Homework • Input energy information into Portfolio Manager

until you have at least three years of data on record

– Send us report

• Using all resources at your disposal, identify at least five potential projects that could increase energy efficiency at your utility (and associated costs)

• Be prepared to present for 10-15 minutes on both at next workshop

energy management planning for small water systems workshop one... · energy management planning...

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