NREL receives funding from Congress to be applied toward research and development projects. Learn more about the database. Introduction to Illinois Energy Efficiency Programs. 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. 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. 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. 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 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… 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. Note that local codes may require more than R-10 when insulating foundation walls. Single-Family Housing Stock. An alternative would be to retain the existing fuel-fired furnace for backup heat, but that scenario is not considered in this analysis. R-38 and R-60 options were also considered, but this R-49 option had the largest economic potential for this state. 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). Operated by the Alliance for Sustainable Energy, LLC Wilson, E., et al. HPC Energy Research files: 2, dataset size: 3.69 GB dataset id: d332818f-ef57-4189-ba1d-beea291886eb Single-Family Housing Stock. NREL also performs research on photovolt 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 . For this scenario, the existing electric baseboards are left in place to provide this supplemental heat. SAM includes financial models for the following kinds of projects: Residential building (retail electricity rates) Point of contact: Office of Energy Efficiency and Renewable Energy 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 2017. The analysis results presented here used the following approach and input assumptions. Gain insights on the methodology and view national- and state-level results in the NREL Technical Report, Energy Efficiency Potential in the U.S. 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.". 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.). With support from the U.S. Department of Energy, NREL developed this tool to help users determine the most cost-effective retrofit measures for improving energy efficiency of existing homes. This arrangement allows a private entity to operate the lab on behalf of the federal government. Webmaster  |  Security & Privacy  |  Disclaimer  |  NREL Home. When migrating this data center into the RSF, NREL’s engineers prioritized energy efficiency, identifying opportunities to upgrade the data center and make it suitable for a net-zero energy building. Energy used by Illinois single-family homes that can be saved through cost-effective improvements. of rigid extruded polystyrene foam to the interior side of foundation walls and rim joists in finished and unfinished basements. 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. It meets NEEP's "Cold Climate Air-Source Heat Pump Specification," so it can be considered a cold climate heat pump (CCHP). More details on the methodology and input assumptions can be found in the NREL technical report, Energy Efficiency Potential in the U.S. This foundation insulation improvement adds R-10 (2 in.) Single-Family Housing Stock. This improvement also includes adding R-8 insulation to any uninsulated ducts located in unconditioned space. 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-5500-68816 • September 2017 × 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. January 2017. This improvement could alternatively be triggered by failure of a home's AC, in which case the economics would be similar or better. To learn more, read our blog. Field studies using this "displacement" model suggest that DHPs typically cover 70%-80% of the heating load. Single-Family Housing Stock. Other studies have used values ranging from 60%-80% displacement of the heating load. This improvement involves installing a smart thermostat to control a home's central heating and/or cooling system. This improvement involves adding R-5 of rigid foam sheathing (e.g., 1-in. rigid extruded polystyrene foam) or an R-5 insulated siding product at the time of residing. National Institute of Advanced Industrial Science and Technology Energy Efficiency Potential in the U.S. View webinar slides and recording from a Building America webinar presented on March 29. We confirmed that this degree of setback/setup resulted in a similar range of heating and cooling energy savings as observed in field studies. http://www.nrel.gov/docs/fy18osti/68670.pdf, Energy Efficiency Potential in the U.S. NREL/TP-5500-68670, 2017. 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 … Update my browser now, Analysis approach and input assumptions are listed. The Building Performance Institute, which sets quality assurance and technical standards for home performance professionals, recommends 10% as the maximum allowable duct leakage. Thus they are applicable to homes without existing duct systems. 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. 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. Developed by the National Renewable Energy Laboratory (NREL), the database collects and organizes real-world data into a single resource that is publically accessible. Thus it is common to supplement the "point-source" heat they provide with another heat source. 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. Ducts with existing insulation (typically R-4, R-6, or R-8) do not have any insulation added. 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. The National Renewable Energy Laboratory, located in Golden, Colorado, specializes in renewable energy and energy efficiency research and development. 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. The incorporation of variable-geometry components may hold the key to the elusive combination of increased energy capture and reduced structural costs. Duct and air handler location are not fields available from RECS, so we infer it from foundation type. NREL/TP-462-5173. 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. Supply and return duct surface area is also specified as a function of finished floor area and number of stories. Rated energy factor is at inlet condition of 80 deg-F DB and 60% RH. of rigid extruded polystyrene foam to the interior side of foundation walls and rim joists in crawlspaces, and seals any crawlspace vents. We advance the science and engineering of energy efficiency in buildings, schools, communities, and districts by optimizing energy systems and renewable technologies. NREL is a government-owned, contractor-operated facility, and is funded through the United States Department of Energy. Department of Energy. For full details, see The latest report presents an analysis on the potential impacts of widespread electrification on the U.S. electricity system—specifically, generation and transmission infrastructure investments, fuel use, system costs, and emissions. National Renewable Energy Laboratory. The baseboards are also used during hours of the year when the heating load exceeds the DHP heating capacity. 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. 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. Holes for adding insulation are drilled in each wall cavity (every 16 inches). 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. A conservative value of 60% load displacement was used for this analysis. This improvement involves installing one or more high-efficiency ductless heat pumps (DHPs) in homes heated with electric baseboards. 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 × 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. 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. If 'Auto' is entered, BEopt will use ENERGY STAR criteria to determine the energy factor. 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. NREL/FS-5500-68842 • September 2017. NREL researchers developed a more efficient pathway for the generation of high-octane gasoline and jet fuel blendstocks from biomass. 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%. Abstract. 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. This is especially significant because electric furnaces are most prevalent in hot climates. Differences in approach or format of results may make comparisons to other efficiency potential analyses invalid. 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. 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). This improvement is applied to all homes with vented attics with existing insulation that is less than R-49. DE-AC36-08GO28308 NREL Job Task Analysis: Energy Auditor The ResStock software can be used to analyze additional scenarios with different input assumptions, for additional technologies, or with additional input data for specific city, state, or utility territories. Update your browser to view this website correctly. Thus, 10% was used as the post-retrofit duct leakage value for this analysis. 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. Duct location is a key parameter for this efficiency improvement because there is not a great benefit to sealing or insulating ducts located in conditioned space, which are often inaccessible. This improvement involves sealing and insulating any HVAC supply and return ductwork that is outside of conditioned space. The reference for this improvement is installation of an electric furnace identical to the existing one (100% AFUE). Homes with two or more stories are assumed to have 35% of their supply ducts within conditioned space. Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use. Explore the links below to learn more about Chicago’s energy efficiency and renewable energy strategies and how you can help. 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 × Short, W., Packey, D., Holt, T. (1995) A Manual for the Economic Evaluation of Energy Efficiency and Renewable Energy Technologies. 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. Analysis approach and input assumptions are listed on the reverse side. Analysis approach and input assumptions are listed on the reverse side. Explore our current Job postings, which include research positions and other career in! 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