The energy manager's guide to real time submetering data 1.16.14

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  • 1. The Energy Manager’s Guide to Real-Time Submetering Data Understanding How Asset-Level Submetering Helps Enterprises Comply with Industry Standards and Unlocks Seven Hidden Benefits
  • 2. Table of Contents Executive Summary ..................................................... 3 Introduction to Energy Management .......................... 4 Real-Time, Asset-Level Submetering ........................... 5 Industry Organizations, Programs, and Standards ...... 6 Environmental Protection Agency (EPA) .................................... 8 American Council for an Energy-Efficient Economy (ACEEE) ...... 9 U.S. Green Building Council (USGBC) ........................................ 10 American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) ................................ 11 International Organization for Standardization (ISO) ............... 12 Seven Hidden Benefits of Submetering ..................... 13 Driving Economic Value ............................................................ 14 Seven Hidden Benefits of Submetering .................................... 15 Conclusion ................................................................. 23 About GridPoint ......................................................... 24 Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 2
  • 3. Executive Summary Real-time, asset-level submetering is beneficial because unlike traditional metering solutions, which only measure total site energy usage, submetering data allows energy managers to: • Optimize equipment performance • Implement smarter alarms • Monitor sustainable sources of energy • Leverage dynamic control strategies • Verify project performance and utility bills • Participate in demand response programs • Intelligently design new buildings A variety of standards bodies have recognized the importance of asset-level submetering in an effective energy management system (EMS) and require enterprises to submeter their sites in order to pass building codes and comply with state and local laws. Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 3 To realize the greatest energy and operational savings, energy managers must be able to leverage asset-level submetering data in a comprehensive EMS that enables advanced analysis and dynamic control changes in real time.
  • 4. Introduction to Energy Management Combining control with real-time submetering data Energy management involves the planning and operation of energy consuming and producing assets with the goal of reducing expenses, increasing operational efficiency, and optimizing capital utilization. Traditional control-based energy management systems (EMS) achieve some of these objectives by allowing energy managers to regulate high-energy consuming equipment, implement temperature setpoints, create lighting schedules, and adjust other parameters to establish energy policy within a site or across an enterprise. Submetering data provides a feedback loop for advanced analysis A simple control-based EMS is limited because it does not feed asset-level data back to the energy manager. Instead, an effective EMS must leverage a bidirectional approach that collects real-time, asset-level submetering data from a variety of endpoints and aggregates it in a platform where the energy manager may identify data trends, apply advanced analysis, and make dynamic control adjustments based on those insights (Figure 1). Figure 1. GridPoint’s data-driven approach to energy management Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 4
  • 5. Real-Time, Asset-Level Submetering Advanced visibility, insight, and analysis The typical problem with utility meters today is that they only provide visibility into site-level, main load energy usage and produce billed data 30-60 days after the energy has been consumed (Figure 2). Site Utility Meter ? Utility bills lag 30-60 days Figure 2. Utility meters only provide consumption data for total site energy usage With submetering technology, energy managers may track main load energy usage, real-time consumption at the asset level (e.g. HVAC, lighting, refrigeration, etc.), and production efficacy (e.g. renewables and energy storage) (Figure 3). Utility Meter Submeter Real-time consumption data Figure 3. Submetering enables total site and asset-level insight and analysis Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 5
  • 6. Industry Organizations, Programs, and Standards How Real-Time, Asset-Level Submetering Enhances Industry Compliance Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 6
  • 7. Industry Organizations, Programs, and Standards There are numerous organizations that create and promote standards for energy management and overall building energy efficiency which energy managers should be familiar with, including the Environmental Protection Agency (EPA), the American Council for an Energy-Efficient Economy (ACEEE), the U.S. Green Building Council (USGBC), the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE), and the International Organization for Standardization (ISO). These organizations highlight, among other things, the importance of realtime, asset-level submetering to achieve granular visibility into energy use, optimize site operations, and satisfy regulatory compliance requirements. Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 7
  • 8. EPA Identifying efficiency measures through ENERGY STAR® Many organizations and programs have been established to promote energy management and encourage businesses to purchase technologies that optimize energy use. For example in 1992, the Environmental Protection Agency (EPA) established ENERGY STAR under the authority of the Clean Air Act as a voluntary program to identify and promote more energy efficient products, homes, and buildings.1 In a 2011 report, the National Science and Technology Council stressed that “submetering provides the operations and maintenance transparency necessary to enable more efficient management of energy resources.” 2 ENERGY STAR Portfolio Manager® measures performance against benchmarks To receive the ENERGY STAR, commercial buildings must score 75 or greater using ENERGY STAR Portfolio Manager®, a free online tool that benchmarks energy consumption against similar buildings (Figure 5). Some of the Portfolio Manager criteria include establishing performance baselines, analyzing energy trends, and normalizing energy data for accurate comparisons, all of which can be improved through submetering. Figure 5. ENERGY STAR Portfolio Manager® DataTrends for energy use in retail stores3 Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 8
  • 9. ACEEE Promoting state-level energy savings targets The American Council for an Energy-Efficient Economy (ACEEE) is a non-profit organization that promotes energy efficiency policies, programs, technologies, investments, and behaviors. One such set of policies are the Energy Efficiency Resource Standards (EERS), which are state-level, long-term energy savings targets that utilities or non-utility program administrators must meet through customer energy efficiency programs.4 As of July 2013, 25 states have enacted EERS and to help meet those targets, both states and utilities offer financial incentives and tax credits for things like lighting controls and energy management systems that drive energy savings (Figure 6).5,6 As part of their 2010 study on energy efficiency in buildings, ACEEE confirmed that submetering helped consumers reduce energy usage, lower energy costs, and reduce energy demand, “proving again that submetering is a most effective energy conservation measure.”7 Energy Efficiency Resource Standard Combined Energy Efficiency and Renewable Standards Figure 6. Energy efficiency and renewable standards are active in 25 states across the U.S. Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 9
  • 10. USGBC Providing LEED certification nation-wide In 2000, the U.S. Green Building Council (USGBC) introduced Leadership in Energy and Environmental Design (LEED) as a green building certification system for commercial, institutional, and residential projects.8 The system consists of certain prerequisites and optional credits which add points toward certification. The LEED certification levels include: • • • • Certified: 40-49 points Silver: 50-59 points Gold: 60-79 points Platinum: 80+ points9 There are several LEED credits related to the measurement and verification of building performance that require asset or system-level metering, which is made possible through submetering (Figure 7). Credit Ref. # Description LEED NC Energy & Atmosphere: Credit 5 Install the necessary metering equipment to measure energy use. Track performance by comparing predicted performance to actual performance, broken down by component or system as appropriate. LEED CI Energy & Atmosphere: Credit 3 Install continuous metering equipment for the following end uses: Lighting systems and controls; constant and variable motor loads; variable frequency drive operation, etc. LEED EB Energy & Atmosphere: Credit 3.2 Employ system-level metering covering at least 40% or 80% of the total expected annual energy consumption of the building. Permanent metering recording are required. Figure 7. Submetering-related criteria in LEED certification10 Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 10
  • 11. ASHRAE Driving building code requirements The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE), which was founded in 1894, publishes commonly accepted standards for building system design, energy efficiency, indoor air quality, refrigeration, and sustainability projects.11 These standards are often mandatory in state and local building codes and influence requirements for new construction and major building, system, and equipment retrofits. As of October 2013, ASHRAE requires that all buildings or building additions over 10,000 sq ft include submetering devices that measure energy use for total load, HVAC, lighting, and other assets separately. ASHRAE’s 2013 standard incorporates submetering requirements In early October 2013, ASHRAE introduced its newest set of requirements, Standard 90.1-2013 (Figure 8). This standard added a number of submetering-related requirements, including electrical energy monitoring, for all buildings or building additions over 10,000 sq ft.12 More specifically it states that: • Measurement devices shall be installed to monitor the electrical energy use for total electrical energy, HVAC systems, interior and exterior lighting, and receptacle circuits separately. • The electrical energy usage for all separate loads shall be recorded a minimum of every 15 minutes and reported at least hourly, daily, monthly, and annually. Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 11 Figure 8. ASHRAE’s Standard 90.1-2013 introduced submetering requirements
  • 12. ISO Impacting global energy trends The International Standards Organization (ISO) officially began operations in 1947 and today is the world’s largest developer of voluntary international standards for products, services, and good practices that help make the industry more efficient.13 ISO has published over 19,500 standards that cover almost every aspect of technology and manufacturing, including over 150 standards specifically related to energy efficiency and renewables. ISO 50001 specifies requirements applicable to energy use and consumption, including measurement, documentation and reporting, and procurement practices for equipment, systems, processes, and personnel that contribute to energy performance.14 One such standard, ISO 50001, was released in June 2011 and provides a framework of requirements for energy management systems (EMS) including how to: Establish Energy Policy Implement Control Changes • Develop a policy for more efficient use of energy • Use data to better understand and make decisions about energy use • Continually improve energy management15 Continually Improve EMS Analyze and Report Data Having access to granular submetering data can help energy managers improve performance in all of these areas and more effectively manage energy use across sites (Figure 9). Take Corrective Action Figure 9. Improve EMS performance with submetering data Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. Submeter and Monitor Assets 12
  • 13. Seven Hidden Benefits of Submetering Leveraging Real-Time, Asset-Level Data, Advanced Analysis, and Dynamic Control in a Comprehensive EMS Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 13
  • 14. Driving Economic Value Real-time data maximizes energy savings Incorporating submetering data into an EMS will translate into real savings for energy managers. As shown in the GridPoint Energy Optimization Model (Figure 10), control and building instrumentation saving techniques, such as adjusting temperature setpoints and reducing unnecessary overnight energy consumption, build the strong foundation for an energy management system, but there are additional levels of savings that can be accessed with real-time submetering, which enables a host of data-rich applications. Additional value in operating expense and capital expense savings Submetering data provides further opportunities for operating expense (OPEX) and capital expense (CAPEX) savings, such as preventative maintenance on aging HVAC units or “right-sizing” equipment when designing a new building. With this data, energy managers not only gain insight into current energy expenses at the site and asset level, but they can also forecast how to best optimize the energy needed to operate that site in the future. Figure 10. GridPoint’s Energy Optimization Model delivers multiple levels of savings Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 14
  • 15. Seven Hidden Benefits of Submetering Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 15
  • 16. Seven Hidden Benefits of Submetering #1: Optimized equipment performance To begin, real-time, asset-level submetering helps energy managers drive savings by highlighting opportunities to optimize equipment and site performance. For example, submetering may provide a holistic view of sitewide energy consumption, as well as details regarding asset-level consumption over time. With this level of visibility, energy managers may see how much energy is being used throughout the day and identify which assets are consuming more energy than necessary (Figure 11). Energy managers may also use real-time submetering data to diagnose inefficient equipment and potentially damaging power quality issues. For example, after deploying submetering devices across 1,100 sites, a major retailer identified 249 operational issues. Assuming submetering alone can save businesses up to 4% on energy expenses, then a major retailer that spends $250,000 per site per year across 1,100 sites could save up to $11 million. Energy use during unoccupied hours Figure 11. Submetering data provides asset-level visibility into each site Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 16
  • 17. Seven Hidden Benefits of Submetering #2: Smarter alarms Another benefit of real-time, granular submetering and monitoring data is the implementation of smarter alarms, which can incorporate multiple data points and alert customers to a range of operational issues across their sites. For example, a pharmacy could use real-time submetering and monitoring data to set up alarms for their coolers that contain valuable prescription medicine. If the coolers’ temperature rises above an unsafe threshold or if the coolers stop drawing energy demand, then an alarm would trigger and send an immediate notification out to the energy manager (Figure 12). The energy manager could then quickly address the problem and prevent any inventory spoilage, which for a cooler full of prescription medicine, could cost up to $50,000. After the issue is resolved, the energy manager may also use real-time data to confirm the return to normal activity. Return to normal temperatures Alarm triggered Figure 12. Real-time monitoring data can identify elevated cooler temperatures and potentially save the loss of expensive inventory Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 17
  • 18. Seven Hidden Benefits of Submetering #3: Integrated sustainability With more enterprises adding solar panels and fuel cells to their sites, energy managers may use real-time submetering and monitoring data to measure energy production and determine whether renewable sources of energy are a viable business strategy for each site. For example a major retailer could use solar and fuel cell dashboards to integrate production and consumption data, measure equipment efficiency, and calculate how much they’ve reduced their carbon emissions by not consuming that energy from the grid (Figure 13). This visibility may enable the retailer to increase the number of sites that use sustainable energy sources and even have sites that approach 100% self-generated power. Figure 13. A solar monitoring dashboard displays submetered energy consumption and production information for each site Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 18
  • 19. Seven Hidden Benefits of Submetering #4: Dynamic control Energy managers may also take advantage of real-time, asset-level submetering and monitoring data to increase savings through sophisticated control strategies, which dynamically and automatically adjust operations based on current site conditions. Control strategies leverage the constant feedback loop between equipment and the environment in which it operates to ensure that energy usage is optimized (Figure 14). For example, a major restaurant chain and national convenience store chain were able to save 12% and 22% respectively on annual energy expenses by implementing dynamic control strategies. Control Strategy Description Load Curtailment • Determine which equipment may be turned down or shut off to meet target load limits Dynamic Setpoint • Monitor outdoor temperatures and automatically adjust internal HVAC setpoints to account for spikes and drops HVAC Recovery • Leverage submetering data to determine optimal times to transition zones from unoccupied to occupied setpoints HVAC Setback • Leverage submetering data to determine optimal times to transition zones from occupied to unoccupied setpoints Humidity Control • Monitor indoor humidity and temporarily lower cooling setpoints when humidity levels exceed a certain threshold Demand Control Ventilation • Monitor CO2 concentration and add more fresh air to the building when CO2 levels exceed a certain threshold Motor Protector • Monitor power quality and shut off equipment when there is a voltage imbalance to protect motors from damage Figure 14. Control strategies integrate real-time submetering and monitoring data Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 19
  • 20. Seven Hidden Benefits of Submetering #5: Financial verification for projects and bills In addition, energy managers may boost savings by utilizing real-time submetering to track various projects and verify utility bills. The National Utilities Refund claims that 80% of their audits find errors within clients’ invoices and result in refunds so having access to submetered usage data is critical for resolving these discrepancies.16 Submetering data is also helpful in measuring project performance and providing key stakeholders with the information they need to make data-driven decisions. For example, energy managers may use submetering and monitoring data to measure the impact of equipment retrofits at their sites (Figure 15). With real-time, asset-level data, energy managers can monitor decreases in energy consumption, compare energy savings to reduction goals, and record data to substantiate additional retrofit projects at other sites. Figure 15. Track real-time project performance with submetering data Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 20
  • 21. Seven Hidden Benefits of Submetering #6: Demand response and peak shaping Real-time submetering also gives energy managers the data they need to understand where and when they can shape peak energy use to take advantage of lower utility rates. This data also enables enterprises to participate in lucrative demand response programs that reward sites for reducing load during certain time periods when the utility grid is overtaxed. As an example, a major retailer leverages asset-level submetering data to determine where they can shed load across 840 of their sites during demand response events. In addition, they use recorded submetering data to verify declines in energy usage and the return to normal operations once the event is complete (Figure 16). By shedding load, this retailer receives almost $2 million per year in program compensation. Demand response events Figure 16. Real-time submetering data enables participation in demand response programs Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 21
  • 22. Seven Hidden Benefits of Submetering #7: Intelligent building design Finally, energy managers may benefit from historical submetering and monitoring data by facilitating more intelligent building design. With asset-level granularity, energy managers may see how efficiently their equipment currently operates and how much total energy their sites require for normal operations (Figure 17). This information may then be used to forecast energy capacity for new buildings and “right-size” equipment accordingly. For example, energy managers may use historical data from current sites to accurately predict how much energy a new building would require. This would allow them to determine transformer capacity, purchase the correct number of HVAC units, and ultimately save money on equipment. Figure 17. Leverage asset-level consumption information to design new buildings Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 22
  • 23. Conclusion Real-time submetering data provides granular visibility into asset-level energy consumption and helps buildings meet some of the industry’s leading programs and standards. To truly maximize the value of submetering, energy managers should consider a comprehensive energy management solution that combines real-time submetering and monitoring insights, advanced data analytics, and dynamic, enterprise-wide control. References 1About Energy Star; http://www.energystar.gov/index.cfm?c=about.ab_index. Accessed 9/29/13 2Submetering of Building Energy and Water Usage. October 2011 http://www.energystar.gov/buildings/sites/default/uploads/tools/Submetering_of_building_energy_and_water_usag e.pdf?e296-28f0. Accessed 9/29/13 3Energy Star Portfolio Manager Data Trends, Energy Use in Retail Stores; http://www.energystar.gov/ia/business/downloads/datatrends/DataTrends_Retail_20121006.pdf. Accessed 9/29/13 4ACEEE Energy Efficiency Resource Standards; http://aceee.org/topics/eers. Accessed 9/29/13 5ACEEE Policy Brief, July 2013; http://aceee.org/files/pdf/policy-brief/eers-07-2013.pdf. Accessed 9/29/13 6Database of State Incentives for Renewables and Efficiency: Financial Incentives for Energy Efficiency Table; http://www.dsireusa.org/summarytables/finee.cfm. Accessed 10/4/13 72010 ACEEE Summer Study on Energy Efficiency in Buildings; http://aceee.org/files/proceedings/2010/data/papers/1939.pdf. Accessed 10/4/13 8USGBC History; http://www.usgbc.org/about/history . Accessed 9/29/13 9LEED Certification; http://www.usgbc.org/leed/certification/certify. Accessed 9/29/13 10Pike Research “Electricity Submeters Basic and Advanced Submeter Hardware, Submeter Energy Management Software, and Submetering Services: Market Analysis and Forecasts “ 2Q 2012 11About ASHRAE; https://www.ashrae.org/about-ashrae/. Accessed 8/19/13 12ASHRAE Standards Addenda. Addendum bz, page 30 https://www.ashrae.org/File%20Library/docLib/StdsAddenda/90_1_2010_2012AddendaSupplement_Published.pdf. Accessed 8/19/13 13About 14ISO ISO; http://www.iso.org/iso/home/about.htm. Accessed 10/4/13 50001:2011; http://www.iso.org/iso/catalogue_detail?csnumber=51297. Accessed 10/4/13 15ISO 50001 – Energy Management; http://www.iso.org/iso/home/standards/management-standards/iso50001.htm. Accessed 10/4/13 16National Utilities Refund; http://www.nationalutilitiesrefund.com/Audit-vs--Energy-Switch.html; Accessed 12/6/13 Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 23
  • 24. About GridPoint GridPoint is an innovator in comprehensive, data-driven energy management solutions (EMS) that leverage the power of real-time data collection, big data analytics and cloud computing to maximize energy savings, operational efficiency, capital utilization and sustainability benefits. GridPoint’s integrated energy management portfolio of asset-level submetering and monitoring, intelligent control, energy management software, and professional services, provides customers granular visibility, actionable analysis, and dynamic control that can generate 10-30% energy savings and an 18-36 month payback. GridPoint solutions are deployed at over 12,000 sites with over 64 billion customer data points collected to date, and 100 million added daily. Customers include 7 of the top 20 quick serve restaurants, 4 of the top 10 casual dining restaurants, 3 of the top 20 convenience store growth chains, 6 of the top 10 retailers by total sales, leading commercial and industrial enterprises, and major government and educational institutions. For more information on GridPoint’s Energy Management System please reference the following white papers: • A Data-Driven Approach to Energy Management • Hurricane Sandy Recovery Accelerated by Energy Management Solution: GridPoint’s Disaster Recovery Framework Energy Manager's Guide to Real-Time Submetering Data © 2014 GridPoint, Inc. All Rights Reserved. 24