BEST PRACTICES FOR ENERGY EFFICIENT OPERATION OF WATER AND WASTEWATER SYSTEMS

Transcription

1 Focus on Energy Agriculture, Schools and Government Program BEST PRACTICES FOR ENERGY EFFICIENT OPERATION OF WATER AND WASTEWATER SYSTEMS Joe Kottwitz, CEM Energy Advisor, Focus on Energy Agriculture, Schools and Government Program

2 AGENDA Focus on Energy Overview Utility Bill Analysis Benchmarking Best Practices Right Sizing Equipment LED Lighting Variable Frequency Drives (VFD) Dissolved Oxygen (DO) Sensor Question & Answer 2

3 WHAT IS FOCUS ON ENERGY? Wisconsin utilities statewide program for energy efficiency and renewable energy. 3

4 WHAT IS FOCUS ON ENERGY? A partnership of all of Wisconsin s investor owned utilities (WPS, Excel, Alliant, WE, etc.), as well as most of the state s electric cooperatives and municipal utilities A single statewide energy efficiency and renewable energy program, rather than separate programs in each utility territory 4

5 WHAT DOES FOCUS ON ENERGY DO? Assists Wisconsin residents and businesses in implementing energy-saving projects Offers unbiased information and technical assistance to participating utilities electric and/or natural gas customers Provides financial incentives for energy-saving projects that would not occur otherwise

6 WHY FOCUS ON ENERGY? Focus on Energy has saved Wisconsin residents and businesses $2.46 for every dollar spent Annually, Wisconsin residents and businesses save over $730 million in energy costs Over 1,700 business partner with Focus on Energy as Trade Allies 6

7 FOCUS ON ENERGY PORTFOLIO OF PROGRAMS Business Programs Residential Programs Farms Schools Government Agencies Businesses Chain Stores & Franchises Design Assistance Large Energy Users Retrocomissioning Appliance Recycling Express Energy Efficiency Home Performance with ENERGY STAR Lighting and Appliance New Homes Residential Renewable Energy Residential and Enhanced Rewards 7

8 AGRICULTURE, SCHOOLS AND GOVERNMENT PROGRAM Customer Eligibility: Dairy Operations Livestock Crops Greenhouse and Nursery Tribes Federal, State, County and Municipal entities including Wastewater Facilities K-12 Schools Colleges and Universities 8

9 FOCUS ON ENERGY BUSINESS INCENTIVES Energy Efficiency: Agribusiness Commercial Refrigeration Compressed Air Custom Projects Food Service HVAC Wastewater Facilities Information Systems Lighting Motors and Drives New Construction Rooftop Optimization Steam Traps VFDs Renewable Energy: Renewable Energy Competitive Incentive Program

10 FOCUS ON ENERGY BUSINESS INCENTIVES Large Energy User Program Facilities with over 1,000 kw in demand. Wastewater Facilities that treat over 10 million gallons per day. Agriculture, Schools and Government Program Facilities under 1,000 kw of annual demand. Wastewater Facilities that treat less than 10 million gallons per day

11 FOCUS ON ENERGY SERVICES Technical Assistance: Unbiased advice Help describe the improvements necessary Energy evaluations Education and training sessions Network of vendors and market providers 11

12 PRESCRIPTIVE INCENTIVES Direct replacement of qualifying equipment 1. Verify customer and product eligibility; Applications available at focusonenergy.com/applications 2. Purchase and install the equipment 3. Submit completed incentive application with proof of payment 4. Receive incentive check in the mail 12

13 CUSTOM INCENTIVES Efficiency measures not covered by prescriptive program: 1. Contact your Energy Advisor 2. Work with Energy Advisor to calculate energy savings and incentive amount 3. Sign Incentive Agreement (prepared by Energy Advisor). This document serves as pre-approval. 4. Purchase and install equipment 5. Submit completion documentation and receive incentive! 13

14 ENERGY BEST PRACTICES - I Facility energy assessments Real time energy monitoring Electric peak reduction Manage electric rate structure Idle or turn off equipment 14

15 UNDERSTANDING YOUR UTILITY BILLS Do you see your utility bills each month? Do you understand all the charges on your electric bill? What can you do to reduce your bill without capital improvements?

16 BILLING TERMINOLOGY Customer Charge - Recurring charges for administrative activities (service charges) Includes billing, metering and meter reading Demand - Kilowatts (kw) Instantaneous consumption rate. Usually 15 minute intervals. Consumption - Kilowatt-hour (kwh) Basic unit of electric energy = one kilowatt of power supplied to or taken from an electric circuit steadily for one hour.

17 SAMPLE BILL: ENERGY USAGE

18 SAMPLE BILL: DEMAND CHARGES 18

19 BENCHMARKING ENERGY STAR Portfolio Manager Energy performance score Track your improvement over a normalized baseline Measure carbon reductions Allows you to compare your facility to other facilities around the United States (Wastewater Plants) Think fuel efficiency in miles per gallon wastewater facilities will be compared in kwh/mg or kbtu/mg 19

20 ENERGY USE RATES AT WISCONSIN DRINKING WATER UTILITIES Type kwh/1000 gallons Class AB (>4000 customers) 1.51 Class C ( customers) 1.85 Class D (<1000 customers) 1.89 Surface water source (US) 1.4 Groundwater source (US) 1.8 Note: The energy rates for the three classes of utility include distribution losses and delivery to customers. The average water loss for the state is 11% of the water produced. 20

21 21 **Go to Joe Cantwell s Slides (slide 33) and finish the KPI section and demand awareness

22 ENERGY BEST PRACTICES - II Purchase appropriately sized energy-efficient equipment: Pumps Install high efficiency motors Variable speed technologies Adjustable speed drives (VFDs, VSDs) Impellers Lower friction pipes and coatings Valves Capacitors 22

23 WATER SUPPLY AND DISTRIBUTION Solutions: Premium efficiency motors VFD s Right sized pumps Re-design based on actual demand Scheduling Equipment Operations fill reservoirs at night? Maintenance 23

24 BEST PRACTICE VARIABLE FREQUENCY DRIVE VFDs Match the motor output speeds to the load required Replace throttling valves on discharge piping Energy savings can save 10%-40% when replacing a throttling valve Synchronize pump speed (VFD) and most efficient pump operation (pump curve) 24

25 FAN AND PUMP AFFINITY LAWS The rate of flow in a system is directly proportional to the speed. In other words, if the pump runs 25% faster, then the rate of flow will be 25% greater. The torque of the pump will vary as the square of the change in speed. If the speed increases by 25%, the torque would increase by 56%. Horsepower is proportional to the change in speed cubed. Considering a 50% reduction in required speed, the laws yield an 87.5% decrease in horsepower requirement to meet the different speed requirement. It is this law that makes variable speed drives economical in applications where varying flow rates exist. 25

26 FAN AFFINITY LAWS 26

27 BEST PRACTICE - RIGHT SIZING EQUIPMENT Smaller pumps Having smaller pumps operate for a longer amount of time will reduce your kw demand and have a more constant flow Ensure a turndown to the minimum required gallon per minute (GPM) 27

28 BEST PRACTICE LIGHTING LED s? Induction? Fluorescent? Depends on the location, function and preferences Focus on Energy provides incentives for all three types Fluorescent lamps and ballasts need to be on the CEE approved list LEDs MUST be on one of our approved lists (from DOE ENERGY STAR and Designlights.org ) Lists available on our website 28

29 ENERGY BEST PRACTICES - III Comprehensive planning before design Design flexibility for today and tomorrow Renewable energy options 29

30 ENERGY EFFICIENCY IN WASTEWATER PLANTS VFD applications Optimize flow with controls Recover excess heat from wastewater Cover basins for heat retention Optimize aeration system Fine-bubble aeration Variable blower air flow rate: aerobic Dissolved oxygen control: aerobic 30

31 QUESTIONS? Agriculture, Schools and Government Program Joe Kottwitz Office JLR7 31

32 Slide 31 JLR7 Deleted extra page number (30 was listed twice) Julie Reber, 7/16/2013

33 CONTACT FOCUS ON ENERGY Call Visit Mail focusonenergy.com Focus on Energy 1 S Pinckney, Suite 340 Madison, WI