The analysis results presented here used the following approach and input assumptions. However, unlike some newer ducted CCHPs, the representative unit does not retain heat pump capacity at temperatures below 0 °F, so the scenario includes an electric resistance coil for backup heat in parts of the United States with winter temperatures reaching near or below 0 °F. Retrofit Chicago - Learn more about Chicago's cross-sector effort to drive energy efficiency in municipal, commercial, and residential buildings across the city. The National Renewable Energy Laboratory, located in Golden, Colorado, specializes in renewable energy and energy efficiency research and development. Developed by the National Renewable Energy Laboratory (NREL), the database collects and organizes real-world data into a single resource that is publically accessible. This inverter-driven heat pump is representative of ducted VSHPs currently on the market. NREL: National Residential Efficiency Measures Database Home Page The National Residential Efficiency Measures Database is a publicly available, centralized resource of residential building retrofit measures and costs for the U.S. building industry. Short, W., Packey, D., Holt, T. (1995) A Manual for the Economic Evaluation of Energy Efficiency and Renewable Energy Technologies. The following resources provide more information about the data and allow you to download the data. Operated by the Alliance for Sustainable Energy, LLC NREL’s indoor cultivators mimic conditions in large-scale outdoor algae farms, serving as an efficient testing platform for U.S. Department of Energy (DOE) National Laboratory researchers working to lower the cost of algal biofuels and bioproducts. This foundation insulation improvement adds R-10 (2 in.) DHP installations typically have one or two indoor units per story rather than one or more baseboards, radiators, or supply duct registers in every room. NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. And it offers a custom map of spectral response at different locations. Energy used by Illinois single-family homes that can be saved through cost-effective improvements. The unit used for this analysis has one of the highest efficiencies on the market - SEER 27 and HSPF 11.5. Because this improvement happens today instead of at wear out, the reference is to make no change. Office of Energy Policy and Systems Analysis. This inverter-driven heat pump is representative of ducted VSHPs currently on the market. Illinois Utilities now have Accelerated Energy Efficiency Targets. This can be done from the outside, when it is convenient to remove a row of siding, or from the inside, which requires patching the holes made in the drywall or plaster. Thus they are applicable to homes without existing duct systems. Wind Energy Follow NREL NREL is a national laboratory of the U.S. Department of Energy , Office of Energy Efficiency and Renewable Energy , operated by the Alliance for Sustainable Energy, LLC . National Renewable Energy Laboratory. Single-Family Housing Stock. Both the heat pump and reference replacement furnace capacities are sized in accordance with ANSI/ACCA Manuals J and S, except that the heat pump is sized based on the larger of the heating or cooling loads ("cold climate sizing") rather than the cooling load priority specified by Manual S. Heat pumps provide both heating and cooling, so in homes that have existing air conditioning,these improvements provide cooling energy savings in addition to the heating energy savings. The Building Performance Institute, which sets quality assurance and technical standards for home performance professionals, recommends 10% as the maximum allowable duct leakage. Dennis Schroeder / NREL Energy efficient windows are an important consideration for both new and existing homes. NREL's mission is to develop clean energy and energy efficiency technologies and practices, advance related science and engineering, and provide knowledge and innovations to integrate energy … The original “legacy” data center had an annual energy consumption as high as 2,394,000 kWh and the overall utilization rate was less than 5%. This improvement involves installing one or more high-efficiency ductless heat pumps (DHPs) in homes heated with electric baseboards. See resstock.nrel.gov for more information on using the software, and to learn how to partner with NREL or third-party consultants on additional analyses. NREL/TP-462-5173. In practice, the amount of displacement is highly dependent on occupant behavior and control strategy (set point of supplement heat relative to DHP, doors left open or closed, insulating value of the thermal enclosure, comfort preferences, etc.). The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Ducts with existing insulation (typically R-4, R-6, or R-8) do not have any insulation added. of rigid extruded polystyrene foam to the interior side of foundation walls and rim joists in crawlspaces, and seals any crawlspace vents. A conservative value of 60% load displacement was used for this analysis. Wilson, E., et al. The System Advisor Model (SAM) is a performance and financial model designed to estimate the cost of energy for grid-connected power projects based on installation and operating costs and system design in order to facilitate decision making for people involved in the renewable energy industry. NREL/FS-5500-68842 • September 2017. Holes for adding insulation are drilled in each wall cavity (every 16 inches). If 'Auto' is entered, BEopt will use ENERGY STAR criteria to determine the energy factor. Department of Energy. View webinar slides and recording from a Building America webinar presented on March 29. Webmaster  |  Security & Privacy  |  Disclaimer  |  NREL Home. NREL receives funding from Congress to be applied toward research and development projects. HPC Energy Research files: 2, dataset size: 3.69 GB dataset id: d332818f-ef57-4189-ba1d-beea291886eb Energy Efficiency Potential in the U.S. For full details, see Researchers from the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) and the University of New South Wales achieved a new world-record efficiency for two-junction solar cells, creating a cell with two light-absorbing layers that converts 32.9% of sunlight into electricity. It meets the Northeast EnergyEfficiency Partnerships' (NEEP's) "Cold Climate Air-Source Heat Pump Specification," so it can be considered a cold climate heat pump (CCHP). We confirmed that this degree of setback/setup resulted in a similar range of heating and cooling energy savings as observed in field studies. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Blown-in fiberglass and blown-in cellulose insulation have similar costs and performance,so a distinction is not made for this analysis. It meets NEEP's "Cold Climate Air-Source Heat Pump Specification," so it can be considered a cold climate heat pump (CCHP). The reference for these improvements is based on the current federal standard for furnaces of 82% for oil. The Lawrence Berkeley National Laboratory's "Best Practices Guide for Residential HVAC Retrofits" also recommends a target duct leakage of less than 10% of air handler flow for duct sealing retrofits. U.S. Energy and Employment Report, Analysis approach and input assumptions are listed here. For this analysis, we used a distribution of leakage based on a normal distribution centered at 20% leakage with a standard deviation of 8% leakage. For this analysis, duct leakage is defined as the fraction of air handler fan flow rate that leaks out of pressurized supply ducts into unconditioned space, plus the fraction of fan flow rate that leaks into depressurized return ducts from unconditioned space, plus any leakage into or out of the air handler itself (all measured at 25 pascals pressure difference). Single-Family Housing Stock. This foundation insulation improvement adds R-10 (2 in.) There is a lack of good data on the range of duct leakage in existing homes, but one field study found an average of 21% leakage. The modeled unit retains heat pump capacity at temperatures down to -15 °F, so it could also be classified as a "very cold climate heat pump.". Introduction to Illinois Energy Efficiency Programs. Find a Job Explore our current job postings, which include research positions and other career opportunities in a variety of fields. Update your browser to view this website correctly. NREL is a government-owned, contractor-operated facility, and is funded through the United States Department of Energy. Find NREL-developed data sets, maps, models, and tools used for the analysis of energy and energy efficiency technologies. The reference for this improvement is installation of an electric furnace identical to the existing one (100% AFUE). SAM includes financial models for the following kinds of projects: Residential building (retail electricity rates) This improvement also includes adding R-8 insulation to any uninsulated ducts located in unconditioned space. http://www.nrel.gov/docs/fy18osti/68670.pdf, Energy Efficiency Potential in the U.S. Explore the links below to learn more about Chicago’s energy efficiency and renewable energy strategies and how you can help. In homes without existing air conditioning, total energy use could increase because of new AC usage. NREL/TP-5500-68670, 2017. Field studies using this "displacement" model suggest that DHPs typically cover 70%-80% of the heating load. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. DE-AC36-08GO28308 NREL Job Task Analysis: Energy Auditor Wilson, E., et al. January 2017. Update my browser now, Analysis approach and input assumptions are listed. Energy used by Washington single-family homes that can be saved through cost-effective improvements, Washington existing jobs in energy efficiency (2016)1, 1U.S. NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68827 • September 2017 × SLOPE is developed and maintained by the National Renewable Energy Laboratory with funding and support from the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy. NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68842 • September 2017 × Thus, 10% was used as the post-retrofit duct leakage value for this analysis. This improvement brings the R-value of attic floor insulation up to R-49. Energy Efficiency Potential in the U.S. The heat pump is sized in accordance with ANSI/ACCA Manuals J and S, except that the heat pump is sized based on the larger of the heating or cooling loads ("cold climate sizing") rather than the cooling load priority specified by Manual S. Heat pumps provide both heating and cooling, so this improvement provides cooling energy savings in homes that already have cooling (room ACs or, less commonly, central AC). With this in mind, a 4 °F thermostat setback in heating mode and a 4 °F thermostat setup in cooling mode was used to model the smart thermostat in the subhourly building energy simulations. Erin BoydErin.Boyd@hq.doe.gov, NREL is a national laboratory of the U.S. Department of Energy By accessing the database, the user agrees to the terms and conditions of use. Prepared by Eric Wilson and Noel Merket, NREL, and Erin Boyd, U.S. Department of Energy Office of Energy Policy and Systems Analysis. R-38 and R-60 options were also considered, but this R-49 option had the largest economic potential for this state. Get Involved. Learn more about the database. For this scenario, the existing electric baseboards are left in place to provide this supplemental heat. The results of this analysis assume a siding replacement rate that ranges from 10% of 1980s homes to 50% of pre-1950s homes (see Wilson et al. This improvement involves adding R-5 of rigid foam sheathing (e.g., 1-in. This improvement involves installing a smart thermostat to control a home's central heating and/or cooling system. Beginning in 2018, Com Ed will achieve 7.8% cumulative persisting annual electric savings. Thus, the cost of this improvement only includes the additional material and labor costs associated with the insulation; the removal of old siding and installation of new siding is not included. Homes with two or more stories are assumed to have 35% of their supply ducts within conditioned space. The National Renewable Energy Laboratory released a fifth volume in its Electrification Futures Study series. It meets NEEP's "Cold Climate Air-Source Heat Pump Specification", so it can be considered a cold climate heat pump. DHPs are a subset of mini-split heat pumps that use a wall-, floor-, or ceiling-mounted indoor unit to distribute heated and cooled air. We considered an alternative scenario using a less efficient (and less expensive) SEER 14, HSPF 8.2 heat pump instead of the high-efficiency heat pump described here; however, that scenario provided lower economic potential in almost all regions (using both NPV>0 and SPP<5 thresholds). ResStock is free, open source, and publicly available, with the large-scale simulations running on Amazon cloud computing. For this analysis, we assume that finished basements are heated and cooled, whereas unfinished basements are not directly heated or cooled. NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC NREL/FS-5500-68800 • September 2017 × rigid extruded polystyrene foam) or an R-5 insulated siding product at the time of residing. 2017 for details). NREL's Building Energy Science team focuses on early-stage research for building energy technologies, including advanced components and efficiency strategies for new buildings and retrofits. This number ramps up every year through 2030, at the end of which Com Ed will achieve 21.5% cumulative persisting annual savings. More details on the methodology and input assumptions can be found in the NREL technical report, Energy Efficiency Potential in the U.S. Duct and air handler location are not fields available from RECS, so we infer it from foundation type. Publications of rigid extruded polystyrene foam to the interior side of foundation walls and rim joists in finished and unfinished basements. Single-Family Housing Stock. The Chicago Renewable Energy Challenge Program is a new initiative designed to accelerate the adoption of renewable energy across every neighborhood in Chicago. However, unlike some newer ducted CCHPs, the representative unit does not retain heat pump capacity at temperatures below 0 °F, so the scenario includes an electric resistance coil for backup heat in parts of the United States with winter temperatures reaching near or below 0 °F. The National Residential Efficiency Measures Database is a publicly available, centralized resource of residential building retrofit measures and costs for the U.S. building industry. 2017. This arrangement allows a private entity to operate the lab on behalf of the federal government. Researchers at the National Renewable Energy Laboratory (NREL) are rethinking WEC designs to provide a new pathway for the development of next-generation cost-competitive systems. Analysis approach and input assumptions are listed on the reverse side. The System Advisor Model (SAM) is a performance and financial model designed to estimate the cost of energy for grid-connected power projects based on installation and operating costs and system design in order to facilitate decision making for people involved in the renewable energy industry. This is especially significant because electric furnaces are most prevalent in hot climates. This improvement involves installing a new high-efficiency variable-speed heat pump (SEER 22, HSPF 10) upon failure of the existing centrally ducted oil furnace. Point of contact: The baseboards are also used during hours of the year when the heating load exceeds the DHP heating capacity. Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use. Blown-in attic insulation only applies to vented attics, not finished attics or cathedral ceilings. Single-Family Housing Stock, National Residential Efficiency Measures Database, https://basc.pnnl.gov/resource-guides/mini-split-ductless-heat-pumps, https://basc.pnnl.gov/resource-guides/continuous-rigid-insulation-sheathingsiding, https://basc.pnnl.gov/resource-guides/rigid-foam-insulation-existing-exterior-walls, https://basc.pnnl.gov/resource-guides/unvented-crawlspaces-and-conditioned-basements, https://basc.pnnl.gov/resource-guides/blown-insulation-existing-vented-attic, Btu per year gas, propane, and fuel oil savings. Single-Family Housing Stock. These improvements were assumed to be triggered by failure of the existing furnace; if instead they were triggered by failure of a home's AC, the economics would be similar or better. This improvement involves installing a new high-efficiency variable-speed heat pump (VSHP) (SEER 22, HSPF 10) upon failure of the existing centrally ducted electric furnace. This improvement involves sealing and insulating any HVAC supply and return ductwork that is outside of conditioned space. This LED-based pulse quantum efficiency (QE) system enables NREL to measure the spectral response of PV modules quickly and reliably, without the need to individually tab cells. The National Renewable Energy Laboratory is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy… National Institute of Advanced Industrial Science and Technology This improvement involves adding densely packed cellulose or fiberglass insulation to existing wood-framed wall cavities that are empty. NREL/TP-5500-68670, 2017. http://www.nrel.gov/docs/fy18osti/68670.pdf, This work was supported by the U.S. Department of Energy Building Technologies Office and the We advance the science and engineering of energy efficiency in buildings, schools, communities, and districts by optimizing energy systems and renewable technologies. While fiberglass batt insulation is sometimes used to insulate foundation walls, rigid foam board is considered best practice due to its superior durability when exposed to water. Office of Energy Efficiency and Renewable Energy Consultants on additional analyses R-4, R-6, or R-8 ) do have... These improvements is based on the methodology and input assumptions foam to the interior side of foundation walls rim. Toward research and development for these improvements is based on the market download... Significant because electric furnaces are most prevalent in hot climates of new usage... 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This inverter-driven heat pump is representative of ducted VSHPs currently on the methodology and view national- and state-level results the!

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