Power metering

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Power metering

Electrical power system efficiency●30% of energy delivered to end users is wasted due to buildinginefficiency. That is 10% of global primary energy●1 unit of electricity saved in a building = 3 units saved at the power plantSchneider Electric - Marketing – Ricky Wong – July 094


Why monitor power?Information to manage total costs●Save 2-4% of utility bills by knowing whereand how energy is being used●Save 2-5% on operating costs by optimizingutilization and eliminating unnecessaryequipment purchases●Study compared savings of non-meteredprojects vs. projects with monitoring:● Projects with monitoring achieved 115% ofestimated savingsSchneider Electric - Marketing – Ricky Wong – July 095


Reduce Utility Costs●Understand usage patterns to negotiate betterutility rates and optimize system●Avoid unnecessary peak demands andpenalties●Distribute costs by shift, department, product orcost center●Drive accountability to every level of yourorganization.●Base purchasing decisions on actual loadprofiles●Implement improvement projects thatpermanently reduce annual utility costs thatimpact bottom line.Schneider Electric - Marketing – Ricky Wong – July 096


Understand Usage PatternsHistorical values,date, and timeInterval by intervaldataEasy navigationUser-selectablevalues andtimescalesLook at allWAGES data in oneplace, includingprices and weatherSchneider Electric - Marketing – Ricky Wong – July 097


Avoid Unnecessary Peaks and PenaltiesRun standard costallocation, usageand trend reportson demand or on ascheduled basisView load data ingraphical or tabularformat, detail orsummaryLook at data usingdifferent time frames(ie, day, week,month)Schneider Electric - Marketing – Ricky Wong – July 098


Allocate and Distribute CostsCompare tariffs tonegotiate bestcontract termsSelect dates thatalign with businessand financial periodsinstead of utilitybilling periodsLook at the costsassociated withdemand and usageSchneider Electric - Marketing – Ricky Wong – July 099


Optimize Equipment and ImproveReliability●Compare facility energy efficiency to determinemost efficient and profitable facility ordepartment●Balance loads●Monitor equipment to get most out of yourassets●Justify capital expenditures and/or locateexcess capacity●Implement improvement projects thatpermanently reduce annual utility costs thatimpact bottom lineSchneider Electric - Marketing – Ricky Wong – July 0910


Compare Facility Energy EfficiencyCompare basedon actual usageor normalizedusage ie. kwh/sqftComparemeters or groupsof meters toidentifydifferences inusage patternsSchneider Electric - Marketing – Ricky Wong – July 0911


Justify Capital ExpendituresIncreaseconfidence inknowing where toadd new loadsEvaluate capitalequipmentexpansions such aspeak demandreduction or powerfactor correctionBase decisions onactual usageperformanceTrack and monitorimprovementsSchneider Electric - Marketing – Ricky Wong – July 0912


Enterprise Data AccessEnterprise accessto energyinformationE-mail reportsautomatically ondaily/weekly/monthlybasisUser-definedrecipientsData exports forExcel, Word, etc.Schneider Electric - Marketing – Ricky Wong – July 0913


Data CommunicationSMSInternetSchneiderEPO ServerVictoria, BCCanadaCustomer FirewallCustomer Ethernet NetworkEnergy ProfilerOnline (EPO)Customer●Schneider meters orgateways are installed atcustomer sites andconnected to the internet●Data files are sent via theinternet automatically tosecure EPO servers andstored for 24/7 customeraccess●Via web browser, customeraccesses and views dataEGX400ION 7650CM3000CM4250ION 6200PM700Schneider Electric - Marketing – Ricky Wong – July 0914


Realizing Energy SavingsBehavior Information SavingsSchneider Electric - Marketing – Ricky Wong – July 0915


Managing Behavior“By changing employee attitudes and behavior, it is possible to significantly reduceenergy use and contribute to the savings achieved through technical measures”– Office of Energy Efficiency, Natural Resources Canada●Studies have shown that:●29% of the cause of failed energy savingsinitiatives are human factor related.●26% of expected savings can come from modifyingoperation and maintenance procedures.●Persistent feedback promotes persistent energyconservation behaviorSchneider Electric - Marketing – Ricky Wong – July 0916


An Energy Information System (EIS)Improves ResultsSchneider Electric - Marketing – Ricky Wong – July 0917


Energy Information System (EIS)●An EIS provides:●Identification, justification, & prioritization of energy savings projects●Performance auditing●Verification of expected return on investment (ROI)●Early detection of poor performance●Energy budgeting & forecasting●Energy financial analysis●Rating verification (ex: Energy Star, LEED)Schneider Electric - Marketing – Ricky Wong – July 0918


PowerLogic EEMApplicationsSchneider Electric - Marketing – Ricky Wong – July 0919


PowerLogic EEM: Applications●PowerLogic EEM is an Energy Information Systems (EIS). It supports:Energy ConservationEnvironmental ManagementOperational ExcellenceSchneider Electric - Marketing – Ricky Wong – July 0920


PowerLogic EEM: Energy Conservation● Drive energy awareness and behavior● Audit Utility bills● Identify, prioritize, justify, & audit energy savings projects● Normalize and track energy usage, intensity, and costs● Model, baseline, and compare equipment and data center energy efficiency● Forecast energy usage and costsSchneider Electric - Marketing – Ricky Wong – July 0921


PowerLogic EEM: EnvironmentalManagement● Environmental tracking & reporting● Greenhouse gases● Airborne pollutants● Regulation compliance reporting● Onsite generatorsSchneider Electric - Marketing – Ricky Wong – July 0922


PowerLogic EEM: OperationalExcellence● Equipment & infrastructure troubleshooting, optimization, and maintenance● Safely maximize power density● Safely maximize infrastructure utilization● Capacity planning● Identify, analyze, resolve, and track power quality issues that effect reliability● Identify, track, and minimize electrical losses● Current harmonics● Distribution● Power factorSchneider Electric - Marketing – Ricky Wong – July 0923


Accurately Measuring EnergyPerformance in BuildingsSchneider Electric - Marketing – Ricky Wong – July 0924


Let’s get started1Use energy efficiency metrics to trackperformance:BuildingSub System (Lighting, IT, & HVAC)Equipment (Chillers, Cooling Towers, Boilers, etc.)Schneider Electric - Marketing – Ricky Wong – July 0925


Building1Energy Usage Intensity (EUI)• Whole Building (kBtu/gsq-ft yr)• Electric (kBtu/gsq-ft yr)• Fossil Fuels (kBtu/gsq-ft yr)• Water (gallons/gsq-ft yr)Energy Cost Intensity• Whole Building ($s/gsq-ft yr)• Electric ($s/gsq-ft yr)• Fossil Fuels ($s/gsq-ft yr)• Water ($s/gsq-ft yr)Carbon Emissions Intensity• CO2 e /gsq-ft yrSchneider Electric - Marketing – Ricky Wong – July 0926


Sub Systems1Energy Usage Intensity (EUI)• Lighting (kBtu/gsq-ft yr)• IT (kBtu/gsq-ft yr)• Heating (kBtu/gsq-ft yr, kBTU/HDD)• Cooling (kBtu/gsq-ft yr, kBTU/CDD)• Ventilation (kBtu/gsq-ft yr)Energy Cost Intensity• Lighting ($s/gsq-ft yr)• IT ($s/gsq-ft yr)• Heating ($s/gsq-ft yr, $s/HDD)• Cooling ($s/gsq-ft yr, $s/CDD)• Ventilation ($s/gsq-ft yr, $s/cfm)Schneider Electric - Marketing – Ricky Wong – July 0927


Equipment1Cooling• Chiller Efficiency (kW/ton)• Cooling Tower Efficiency (kW/ton)• Chilled Water Pumping Efficiency (kW/gpm)• Condenser Water Pumping Efficiency (kW/gpm)• Water Side Economizer Utilization Factor (%)• Evaporative Cooling Utilization Factor (%)Heating• Boiler Efficiency (%)Ventilation• Airflow Efficiency (W/cfm)Schneider Electric - Marketing – Ricky Wong – July 0928


1Energy efficiency metricsSchneider Electric - Marketing – Ricky Wong – July 0929


Is that the end of the story?NOA energy efficiency metric only has value if :An accurate baseline is used to measureperformance over timeA benchmark is developed to compare relativeperformance and develop best practicesSchneider Electric - Marketing – Ricky Wong – July 0930


On the right track2Create an accurate baseline todeterminetrue energy performanceVs.Schneider Electric - Marketing – Ricky Wong – July 0931


The importance of an accurate baseline 2● The baseline year for Building A is 2003● Building A’s energy intensity for 2003 is 120 kBtu/gsq-ft yr● Building A’s energy intensity for 2009 is 116 kBtu/gsq-ft yrSavings are ~ 3%, but…the target is 5%Schneider Electric - Marketing – Ricky Wong – July 0932


Let’s take a closer look2What happened?Schneider Electric - Marketing – Ricky Wong – July 0933


Let’s take a closer look…2The summer in 2009 washotter than 2003Building A had higheroccupancy in 2009Schneider Electric - Marketing – Ricky Wong – July 0934


Adjust the baseline using 2009conditions2Compare actual vs. adjustedAdjusted BaselineActual• 123 kBtu/gsq-ft yr• 116 kBtu/gsq-ft yrSchneider Electric - Marketing – Ricky Wong – July 0935


Calculate true energy savings2Baseline (2003)Adjusted BaselineActual• 120 kBtu /gsq-ft yr• 123 kBtu/gsq-ft yr• 116 kBtu/gsq-ft yrThe target is 5% and...true savings are ~ 6%Schneider Electric - Marketing – Ricky Wong – July 0936


How to create an accurate baseline212345• Pick a baseline year (ex: 2003)• Determine what variables (ex: weather) affect energy usage• Create an energy model (ex: ASHRAE Guideline 14-2002)• Adjust the baseline using today’s conditions (ex: weather)• Compare today’s energy performance vs. the adjusted baselineSchneider Electric - Marketing – Ricky Wong – July 0937


For example…..21● The baseline year for Building A is 2003● The square footage of Building A is 57,000● Building A’s energy intensity for 2003 is 120 kBtu/gsq-ft yr2● Statistical analysis tells us that the following variables correlate withenergy usage:1. Air temperature2. Wind speed3. Occupancy4. Hours of OperationSchneider Electric - Marketing – Ricky Wong – July 0938


For example23● Find the appropriate whole building energy model(ex: ASHRAE Guideline 14-2002)● Create a model for each building4700000Building Energy UsageBaseline (2003)Adjusted Baseline650000600000550000500000Adjust baseline to currentconditions using the model450000400000Schneider Electric - Marketing – Ricky Wong – July 0939


For example…..25Compare actual vs. adjustedBaseline (2003)Adjusted BaselineActual• 120 kBtu /gsq-ft yr• 123 kBtu/gsq-ft yr• 116 kBtu/gsq-ft yrSchneider Electric - Marketing – Ricky Wong – July 0940


For example25Set the target vs adjusted baselineAudit true building performanceSchneider Electric - Marketing – Ricky Wong – July 0941


Into the homestretch….3Find an appropriate benchmarkSchneider Electric - Marketing – Ricky Wong – July 0942


Apples vs Oranges3Building A has an energy usage intensity (EUI) of 116 kBtu/gsq-ft yrBuilding B has an energy usage intensity (EUI) of 108 kBtu/gsq-ft yrWhich Building is the most efficient?It Depends!!!Schneider Electric - Marketing – Ricky Wong – July 0943


Diving into the details31• Pick a reference building and group it with similar building types2• Run the variables for the reference building through the energymodels of the other buildings3• Calculate kBtu/sq-ft yr values for each building using the modeledoutputSchneider Electric - Marketing – Ricky Wong – July 0944


For example…..31● Building A is the reference building● Buildings B, C, & D are similar building types to Building A● All of the buildings have pre-created energy models2● Run the energy variables for Building A through all of the energy modelsin the benchmarking group:Schneider Electric - Marketing – Ricky Wong – July 0945


For example33● Calculate the EUI for each building using the modeled energy data :Building A • 116 kBtu per gsq-ft yrBuilding B • 146 kBtu per gsq-ft yrBuilding C • 117 kBtu per gsq-ft yrBuilding D• 125 kBtu per gsq-ft yrSchneider Electric - Marketing – Ricky Wong – July 0946


Summary12Use energy efficiency metrics to trackperformanceCreate an accurate baseline to determinetrue energy performance3 Find an appropriate benchmark to determinerelative performance within a peer groupSchneider Electric - Marketing – Ricky Wong – July 0947


ENDSchneider Electric - Marketing – Ricky Wong – July 0948

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