Xcel Energy Inc. · NASDAQ:XEL
Xcel Energy — Xcel Energy Webinar: VFDs Drive Efficiency (October 2013)
26 slides from Xcel Energy's conference presentation, Oct 24, 2013
Slide 1: Xcel Energy Webinar: VFDs Drive Efficiency
Xcel Energy Webinar October 24, 2013 11:30 am to 1:00 pm CT VFDs Drive Efficiency: Learn how Variable Frequency Drives can benefit your facility. 1
Slide 2: Cost of doing business
Cost of doing business Electricity costs typically account for approximately 95% of the cost to own and operate electric motors over a ten-year operating period. The purchase price plus installation, maintenance and other costs account for 5% over the same ten year operating period.* * (Source: Cent
Slide 3: Fundamentals of VFDs
Fundamentals of VFDs Motors in the United States operate at a fixed frequency of 60 Hz (1 cycle every 1/60 seconds). 3
Slide 4: Fundamentals of VFDs
Fundamentals of VFDs ► A VFD changes the frequency of the current going to the motor ► A reduction in frequency results in the shaft of the motor spinning at speeds lower than the standard 1200, 1800, and 3600 RPMs (depending on the motor) 4
Slide 5: Benefits of VFDs
Benefits of VFDs ► Added Control – smoother acceleration & deceleration, automated response to system conditions (e.g. pressure, flow, etc…) ► Power Factor Correction ► Soft Start – reduction of high starting torque and current surges that can be up to eight times the full-load current ► Energy Savi
Slide 6: Energy savings potential
Energy savings potential ►Fans & Pumps offer the highest potential for savings ►Example: ►Flow Increase 10% ►Power increase 33% Small decrease in flow = Bigger decrease in power 6
Slide 7: Energy savings potential
Energy savings potential ► Savings vary by application ► Applications such as extruders and conveyors may experience savings, but not to the same degree as fans and pumps. ► Right tool for the right job 7
Slide 8: Market segments
Market segments ► Industrial Processes – such as glass manufacturing, mining, refining ► Food processing ► Grocery Stores ► Commercial Space (retail & real estate) ► Schools & Universities ► Cold Storage ► Hospitals ► City waste water treatment plants, etc 8
Slide 9: Common applications
Common applications ► HVAC fans & pumps ► Refrigeration Compressors ► Air Compressors ► Conveyors ► Extruders …. Just about anything that utilizes an AC motor. 9
Slide 10: Quick review
Quick review ► VFDs offer operational and power consumption benefits ► Can be applied to a wide variety of end-uses ► Savings vary by end-use ► Pumps & fans greatest opportunities 10
Slide 11: Example - The cost of a VFD
Example - The cost of a VFD For K-12 school purchasing a 15 HP VFD on Fan. 15 HP VFD on a fan operating a 15 HP motor: ►Cost for VFD - $2,443 ►Total labor costs - $1,910 These costs include also include: Engineering - $300 VAC Tech - $255 Electrician - $255 ►Total projects costs for VFD - $4,3
Slide 12: The cost of a VFD
The cost of a VFD For this K-12 school ► 15 HP VFD rebate - $1,250 ► 60% of project cost - $2,612 ► Energy Saved - 9,920 kWh and estimated $575.00/year savings ► Project payback – 3.4 years 12
Slide 13: Case study: Greater Twin Cities United Way
Case study: Greater Twin Cities United Way VFD Upgrades yield Big return on a small investment The situation ► A resourceful non-profit with a 68,000 sq ft facility in the heart of downtown Minneapolis was looking for ways to maximize their operating budget ► In need of energy efficiency upgrades so
Slide 14: Case study: Greater Twin Cities United Way
Case study: Greater Twin Cities United Way The Impact of installing two 15 hp VFDs ► 32,665 kWh in total energy savings ► $2,500 in rebates from Xcel Energy ► Less than 17 month payback ► Projected savings from the VFDs is $3,200 annually ► More control over their system 14
Slide 15: Case study: City of Richfield
Case study: City of Richfield VFD project—turning Water Into Savings The situation ► The water treatment plant relies heavily on constant speed motors and VFDs to maintain a steady pump “flow” as the water is transported out of the wells and to approximately 34,000 residents. ► Seven wells and multi
Slide 16: Case study: City of Richfield
Case study: City of Richfield VFD project—turning Water Into Savings Results of the City’s Efforts ► 375,570 kWh in total energy savings ► $20,865 in rebates from Xcel Energy Additional Impacts ► Lower energy costs on each statement ► Increased reliability in motors & VFDs ► Ease of use with automat
Slide 17: Quick review
Quick review ► VFDs have energy savings benefits ► To see more customer case studies visit Responsible By Nature.com 17
Slide 18: When VFDs are not beneficial
When VFDs are not beneficial ►Constant speed or power (hp): when a motor is set to run at full speed ►High static pressure installations: Drives on submersible pumps or any above ground pumps that operate systems with a high static dominated pressure level ►Poor Sequencing: The best sequencing for V
Slide 19: What's most important to Facility Managers & Engineers
What’s most important to Facility Managers & Engineers ► Keep plant running – increase uptime ► Reduce plant operating costs ► Often heard – “Keep the facility running but don’t spend a nickel more than you need to…..” 19
Slide 20: Motor Decisions Matter (MDM)
Motor Decisions Matter (MDM) Change the Purchasing Pattern ► Commitment ► Set goals ► Make action plan ► Implement plan ► Verification ► Recognize achievements ► Repeat cycle ENERGY STAR ®. 10-10-2013. US Environmental Protection Agency and US Department of Energy. http://www.energystar.gov 20
Slide 21: More resources
More resources Motor Decisions Matter (MDM) ► Facility managers are increasingly under pressure to reduce energy costs, increase productivity and reduce greenhouse gas emissions. Sound VFD management is a key strategy to achieve these goals. ► Start today. Because managing a plan is easier than mana
Slide 22: More resources
More resources The Energy-At-Risk Financial Analysis Tool can help you… ► Determine the payback and cost of your VFD & other energy efficiency upgrades. ►Simple payback periods ►ROI ►Break-even analysis ►The cost of doing nothing ► Visit XcelEnergy.com to access this free tool 22
Slide 23: Rebates
Rebates ►To offset the costs of VFDs Xcel Energy offers rebates ranging from $400 to $8,000 ►On either a fan or a pump ►From 1 to 200 hp ►Custom rebates are also available for VFDs ►Chillers, air compressors, refrigeration compressors, etc ►Over 200 hp 23
Slide 24: Quick review
Quick review ► Xcel Energy offers rebates to off-set equipment costs ► We have tools to help you determine the cost of a VFD ► VFDs are beneficial in many market segments and many types of applications ► But are especially beneficial on fans and pumps ► Sometimes VFDs are not beneficial 24
Slide 25: Contact us
Contact us ► Let us help you determine if VFDs can benefit your facility. ► Contact your account manager or the Energy Efficiency Specialists at 1-800-481-4700 ► Or email us at energyefficiency@xcelenergy.com 25
Slide 26: Thank you.
Xcel Energy’ RESPONSIBLE BY NATURE™ Thank you.
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