National Library of Energy BETA

Sample records for furnace gas hvac

  1. Measure Guideline: High Efficiency Natural Gas Furnaces

    SciTech Connect (OSTI)

    Brand, L.; Rose, W.

    2012-10-01

    This Measure Guideline covers installation of high-efficiency gas furnaces. Topics covered include when to install a high-efficiency gas furnace as a retrofit measure, how to identify and address risks, and the steps to be used in the selection and installation process. The guideline is written for Building America practitioners and HVAC contractors and installers. It includes a compilation of information provided by manufacturers, researchers, and the Department of Energy as well as recent research results from the Partnership for Advanced Residential Retrofit (PARR) Building America team.

  2. Measure Guideline. High Efficiency Natural Gas Furnaces

    SciTech Connect (OSTI)

    Brand, L.; Rose, W.

    2012-10-01

    This measure guideline covers installation of high-efficiency gas furnaces, including: when to install a high-efficiency gas furnace as a retrofit measure; how to identify and address risks; and the steps to be used in the selection and installation process. The guideline is written for Building America practitioners and HVAC contractors and installers. It includes a compilation of information provided by manufacturers, researchers, and the Department of Energy as well as recent research results from the Partnership for Advanced Residential Retrofit (PARR) Building America team.

  3. Improving the Field Performance of Natural Gas Furnaces, Chicago...

    Energy Savers [EERE]

    the Field Performance of Natural Gas Furnaces Chicago, Illinois PROJECT INFORMATION Project Name: Improving Gas Furnace Performance-A Field and Lab Study at End of Life Location: ...

  4. Coke oven gas injection to blast furnaces

    SciTech Connect (OSTI)

    Maddalena, F.L.; Terza, R.R.; Sobek, T.F.; Myklebust, K.L.

    1995-12-01

    U.S. Steel has three major facilities remaining in Pennsylvania`s Mon Valley near Pittsburgh. The Clairton Coke Works operates 12 batteries which produce 4.7 million tons of coke annually. The Edgar Thomson Works in Braddock is a 2.7 million ton per year steel plant. Irvin Works in Dravosburg has a hot strip mill and a range of finishing facilities. The coke works produces 120 mmscfd of coke oven gas in excess of the battery heating requirements. This surplus gas is used primarily in steel re-heating furnaces and for boiler fuel to produce steam for plant use. In conjunction with blast furnace gas, it is also used for power generation of up to 90 MW. However, matching the consumption with the production of gas has proved to be difficult. Consequently, surplus gas has been flared at rates of up to 50 mmscfd, totaling 400 mmscf in several months. By 1993, several changes in key conditions provided the impetus to install equipment to inject coke oven gas into the blast furnaces. This paper describes the planning and implementation of a project to replace natural gas in the furnaces with coke oven gas. It involved replacement of 7 miles of pipeline between the coking plants and the blast furnaces, equipment capable of compressing coke oven gas from 10 to 50 psig, and installation of electrical and control systems to deliver gas as demanded.

  5. Improving the Field Performance of Natural Gas Furnaces, Chicago, Illinois (Fact Sheet)

    SciTech Connect (OSTI)

    Rothgeb, S.; Brand, L.

    2013-11-01

    The objective of this project is to examine the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces, as measured by steady-state efficiency and AFUE. PARR identified twelve furnaces of various ages and efficiencies that were operating in residential homes in the Des Moines Iowa metropolitan area and worked with a local HVAC contractor to retrieve them and test them for steady-state efficiency and AFUE in the lab. Prior to removal, system airflow, static pressure, equipment temperature rise, and flue loss measurements were recorded for each furnace. After removal from the field the furnaces were transported to the Gas Technology Institute (GTI) laboratory, where PARR conducted steady-state efficiency and AFUE testing. The test results show that steady-state efficiency in the field was 6.4% lower than that measured for the same furnaces under standard conditions in the lab, which included tuning the furnace input and air flow rate. Comparing AFUE measured under ASHRAE standard conditions with the label value shows no reduction in efficiency for the furnaces in this study over their 15 to 24 years of operation when tuned to standard conditions. Further analysis of the data showed no significant correlation between efficiency change and the age or the rated efficiency of the furnace.

  6. Technology Solutions Case Study: Improving the Field Performance of Natural Gas Furnaces

    SciTech Connect (OSTI)

    2013-11-01

    The objective of this project is to examine the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces, as measured by steady-state efficiency and AFUE. PARR identified twelve furnaces of various ages and efficiencies that were operating in residential homes in the Des Moines Iowa metropolitan area and worked with a local HVAC contractor to retrieve them and test them for steady-state efficiency and AFUE in the lab. Prior to removal, system airflow, static pressure, equipment temperature rise, and flue loss measurements were recorded for each furnace. After removal from the field the furnaces were transported to the Gas Technology Institute (GTI) laboratory, where PARR conducted steady-state efficiency and AFUE testing. The test results show that steady-state efficiency in the field was 6.4% lower than that measured for the same furnaces under standard conditions in the lab, which included tuning the furnace input and air flow rate. Comparing AFUE measured under ASHRAE standard conditions with the label value shows no reduction in efficiency for the furnaces in this study over their 15 to 24 years of operation when tuned to standard conditions. Further analysis of the data showed no significant correlation between efficiency change and the age or the rated efficiency of the furnace.

  7. Gas-Fired Boilers and Furnaces | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    natural gas meter. Gas boilers and furnaces can be fueled by either natural gas or propane with simple modifications accounting for the different characteristics of the fuels....

  8. Covered Product Category: Residential Gas Furnaces

    Broader source: Energy.gov [DOE]

    FEMP provides acquisition guidance across a variety of product categories, including residential gas furnaces, which are an ENERGY STAR-qualified product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

  9. Philadelhia Gas Works (PGW) Doe Furnace Rule | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Philadelhia Gas Works (PGW) Doe Furnace Rule Philadelhia Gas Works (PGW) Doe Furnace Rule DOE Furnace Rule (111.99 KB) More Documents & Publications Focus Series: Philadelphia Energyworks: In the City of Brotherly Love, Sharing Know-How Leads to Sustainability The Better Buildings Neighborhood View -- December 2013 Collaborating With Utilities on Residential Energy Efficiency

  10. American Gas Association (AGA) for DOE Furnace Product Class | Department

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of Energy (AGA) for DOE Furnace Product Class American Gas Association (AGA) for DOE Furnace Product Class Thank you for the opportunity to brief your staff in recent weeks on an impact analysis of a national condensing furnace standard, which was conducted jointly by the American Gas Association (AGA), the American Public Gas Association (APGA), and the Gas Technology Institute (GTI). AGA e-mail for DOE Furnace Product Class (83.56 KB) AGA Cover Letter for Furnace Product Class White Paper

  11. Operating a blast furnace using dried top gas

    SciTech Connect (OSTI)

    Kundrat, D.M.

    1993-08-10

    A method is described of operating a blast furnace, comprising: introducing into the top of the furnace a charge containing metal oxide, coke and flux, collecting a top gas CO, H[sub 2], carbon dioxide and water from the furnace, increasing the reducing potential of said collected top gas by removing water but without removing carbon dioxide from at least a portion of said collected top gas thereby forming a dried top gas, heating said dried top gas to form a heated dried top gas, introducing said heated dried top gas into the lower half of the stack of the furnace at a position above which said coke is not reactive and introducing an oxygen-containing gas and a hydrogenaceous fuel into the bosh of the furnace whereby said metal oxide is reduced to a molten metal using said heated dried top gas.

  12. Gas-Fired Boilers and Furnaces | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    A residential natural gas meter. A residential natural gas meter. What does this mean for me? Your gas boiler or furnace may be oversized, particularly if you've upgraded the...

  13. Furnace

    SciTech Connect (OSTI)

    Cooke, J.C.; Tilley, F.H.

    1983-06-14

    Pieces of shredded tires are fed into the top of a vertical pyrolyzing furnace in a measured amount using a weighing hopper feed mechanism. Heated gas is introduced through inlet and pyrolyzing the tire pieces on a countercurrent flow principle to produce useful hydrocarbon volatiles and residues. The pyrolyzed residue including tire reinforcing wires are efficiently removed from the furnace by a plurality of downwardly inclined screw conveyors disposed in troughs. Each screw conveyor extends into an inclined conduit and discharges into a vertical branch conduit disposed at least partially within the cross-section of the furnace so that even discharge of the pyrolyzed residue is ensured by the combined action of gravity and the screw conveyors.

  14. Radiation from Large Gas Volumes and Heat Exchange in Steam Boiler Furnaces

    SciTech Connect (OSTI)

    Makarov, A. N.

    2015-09-15

    Radiation from large cylindrical gas volumes is studied as a means of simulating the flare in steam boiler furnaces. Calculations of heat exchange in a furnace by the zonal method and by simulation of the flare with cylindrical gas volumes are described. The latter method is more accurate and yields more reliable information on heat transfer processes taking place in furnaces.

  15. Measure Guideline: High-Efficiency Natural Gas Furnaces

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    High Efficiency Natural Gas Furnaces L. Brand and W. Rose Partnership for Advanced Residential Retrofit October 2012 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, subcontractors or affiliates makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information,

  16. Model of the radial distribution of gas in the blast furnace

    SciTech Connect (OSTI)

    Nikus, M.; Saxen, H.

    1996-12-31

    This paper describes an on-line model for estimating the radial gas distribution in blast furnaces. The model is based on molar and energy flow balances for the blast furnace throat region, and utilizes the top gas temperature and gas temperature measurements from a fixed above-burden probe. The distribution of the gas flux is estimated by a Kalman filter. The method is illustrated to capture short-term dynamics and to detect sudden major changes in the gas distribution in Finnish blast furnace.

  17. Strategy Guideline: HVAC Equipment Sizing

    SciTech Connect (OSTI)

    Burdick, A.

    2012-02-01

    The heating, ventilation, and air conditioning (HVAC) system is arguably the most complex system installed in a house and is a substantial component of the total house energy use. A right-sized HVAC system will provide the desired occupant comfort and will run efficiently. This Strategy Guideline discusses the information needed to initially select the equipment for a properly designed HVAC system. Right-sizing of an HVAC system involves the selection of equipment and the design of the air distribution system to meet the accurate predicted heating and cooling loads of the house. Right-sizing the HVAC system begins with an accurate understanding of the heating and cooling loads on a space; however, a full HVAC design involves more than just the load estimate calculation - the load calculation is the first step of the iterative HVAC design procedure. This guide describes the equipment selection of a split system air conditioner and furnace for an example house in Chicago, IL as well as a heat pump system for an example house in Orlando, Florida. The required heating and cooling load information for the two example houses was developed in the Department of Energy Building America Strategy Guideline: Accurate Heating and Cooling Load Calculations.

  18. Minimization of Blast furnace Fuel Rate by Optimizing Burden and Gas Distribution

    SciTech Connect (OSTI)

    Dr. Chenn Zhou

    2012-08-15

    The goal of the research is to improve the competitive edge of steel mills by using the advanced CFD technology to optimize the gas and burden distributions inside a blast furnace for achieving the best gas utilization. A state-of-the-art 3-D CFD model has been developed for simulating the gas distribution inside a blast furnace at given burden conditions, burden distribution and blast parameters. The comprehensive 3-D CFD model has been validated by plant measurement data from an actual blast furnace. Validation of the sub-models is also achieved. The user friendly software package named Blast Furnace Shaft Simulator (BFSS) has been developed to simulate the blast furnace shaft process. The research has significant benefits to the steel industry with high productivity, low energy consumption, and improved environment.

  19. BPM Motors in Residential Gas Furnaces: What are theSavings?

    SciTech Connect (OSTI)

    Lutz, James; Franco, Victor; Lekov, Alex; Wong-Parodi, Gabrielle

    2006-05-12

    Residential gas furnaces contain blowers to distribute warm air. Currently, furnace blowers use either a Permanent Split Capacitor (PSC) or a Brushless Permanent Magnet (BPM) motor. Blowers account for the majority of furnace electricity consumption. Therefore, accurate determination of the blower electricity consumption is important for understanding electricity consumption of furnaces. The electricity consumption of blower motors depends on the static pressure across the blower. This paper examines both types of blower motors in non-condensing non-weatherized gas furnaces at a range of static pressures. Fan performance data is based on manufacturer product literature and laboratory tests. We use field-measured static pressure in ducts to get typical system curves to calculate how furnaces would operate in the field. We contrast this with the electricity consumption of a furnace blower operating under the DOE test procedure and manufacturer rated conditions. Furnace electricity use is also affected by operating modes that happen at the beginning and end of each furnace firing cycle. These operating modes are the pre-purge and post-purge by the draft inducer, the on-delay and off-delay of the blower, and the hot surface ignitor operation. To accurately calculate this effect, we use the number of firing cycles in a typical California house in the Central Valley of California. Cooling hours are not considered in the DOE test procedure. We also account for furnace blower use by the air conditioner and stand-by power. Overall BPM motors outperform PSC motors, but the total electricity savings are significantly less than projected using the DOE test procedure conditions. The performance gains depend on the static pressure of the household ducts, which are typically much higher than in the test procedures.

  20. Improving Gas Furnace Performance: A Field and Laboratory Study at End of Life

    SciTech Connect (OSTI)

    Brand, L.; Yee, S.; Baker, J.

    2015-02-01

    In 2010, natural gas provided 54% of total residential space heating energy the U.S. on a source basis, or 3.5 Quadrillion Btu. Natural gas burned in furnaces accounted for 92% of that total, and boilers and other equipment made up the remainder. A better understanding of installed furnace performance is a key to energy savings for this significant energy usage. In this project, the U.S. Department of Energy Building America team Partnership for Advanced Residential Retrofit examined the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces over the life of the product, as measured by steady-state efficiency and annual efficiency. The team identified 12 furnaces of various ages and efficiencies that were operating in residential homes in the Des Moines, Iowa, metropolitan area and worked with a local heating, ventilation, and air conditioning contractor to retrieve furnaces and test them at the Gas Technology Institute laboratory for steady-state efficiency and annual efficiency. Prior to removal, system airflow, static pressure, equipment temperature rise, and flue loss measurements were recorded for each furnace as installed in the house.

  1. Expert Meeting Report: Achieving the Best Installed Performance from High-Efficiency Residential Gas Furnaces

    SciTech Connect (OSTI)

    Brand, Larry

    2012-03-01

    This report describes a Building America expert meeting hosted on July 28, 2011, by the Partnership for Advanced Residential Retrofit (PARR) team. The purpose of this meeting was to identify installation practices that provide the best installed efficiency for residential gas furnaces, explain how AFUE and field efficiency can differ, and investigate the impact of installation practices on the efficiency and long-term durability of the furnace.

  2. Expert Meeting Report: Achieving the Best Installed Performance from High-Efficiency Residential Gas Furnaces

    SciTech Connect (OSTI)

    Brand, L.

    2012-03-01

    This report describes a Building America expert meeting hosted on July 28, 2011, by the Partnership for Advanced Residential Retrofit team. The purpose of this meeting was to identify installation practices that provide the best installed efficiency for residential gas furnaces, explain how AFUE and field efficiency can differ, and investigate the impact of installation practices on the efficiency and long-term durability of the furnace.

  3. Building America Expert Meeting: Achieving the Best Installed Performance from High-Efficiency Residential Gas Furnaces

    Broader source: Energy.gov [DOE]

    This report describes a Building America expert meeting hosted on July 28, 2011, by the Partnership for Advanced Residential Retrofit team. The purpose of this meeting was to identify installation practices that provide the best installed efficiency for residential gas furnaces, explain how AFUE and field efficiency can differ, and investigate the impact of installation practices on the efficiency and long-term durability of the furnace.

  4. Recovery Act: ArcelorMittal USA Blast Furnace Gas Flare Capture

    SciTech Connect (OSTI)

    Seaman, John

    2013-01-14

    The U.S. Department of Energy (DOE) awarded a financial assistance grant under the American Recovery and Reinvestment Act of 2009 (Recovery Act) to ArcelorMittal USA, Inc. (ArcelorMittal) for a project to construct and operate a blast furnace gas recovery boiler and supporting infrastructure at ArcelorMittal’s Indiana Harbor Steel Mill in East Chicago, Indiana. Blast furnace gas (BFG) is a by-product of blast furnaces that is generated when iron ore is reduced with coke to create metallic iron. BFG has a very low heating value, about 1/10th the heating value of natural gas. BFG is commonly used as a boiler fuel; however, before installation of the gas recovery boiler, ArcelorMittal flared 22 percent of the blast furnace gas produced at the No. 7 Blast Furnace at Indiana Harbor. The project uses the previously flared BFG to power a new high efficiency boiler which produces 350,000 pounds of steam per hour. The steam produced is used to drive existing turbines to generate electricity and for other requirements at the facility. The goals of the project included job creation and preservation, reduced energy consumption, reduced energy costs, environmental improvement, and sustainability.

  5. HVAC Cabinet Air Leakage Test Method- Building America Top Innovation

    Office of Energy Efficiency and Renewable Energy (EERE)

    This 2014 Top Innovation describes Building America research that resulted in the development of an ASHRAE standard and standardized testing method for testing the air leakage of HVAC air handlers and furnace cabinets.

  6. Improving Gas Furnace Performance: A Field and Laboratory Study at End of Life

    SciTech Connect (OSTI)

    Brand, L.; Yee, S.; Baker, J.

    2015-02-01

    In 2010, natural gas provided 54% of total residential space heating energy the U.S. on a source basis, or 3.5 Quadrillion Btu. Natural gas burned in furnaces accounted for 92% of that total, and boilers and other equipment made up the remainder. A better understanding of installed furnace performance is a key to energy savings for this significant energy usage. Natural gas furnace performance can be measured in many ways. The annual fuel utilization efficiency (AFUE) rating provides a fixed value under specified conditions, akin to the EPA miles per gallon rating for new vehicles. The AFUE rating is provided by the manufacturer to the consumer and is a way to choose between models tested on the same basis. This value is commonly used in energy modeling calculations. ASHRAE 103 is a consensus furnace testing standard developed by the engineering community. The procedure provided in the standard covers heat-up, cool down, condensate heat loss, and steady-state conditions and an imposed oversize factor. The procedure can be used to evaluate furnace performance with specified conditions or with some variation chosen by the tester. In this report the ASHRAE 103 test result will be referred to as Annualized Efficiency (AE) to avoid confusion, and any non-standard test conditions will be noted. Aside from these two laboratory tests, steady state or flue loss efficiency can be measured in the field under many conditions; typically as found or tuned to the manufacturers recommended settings. In this report, AE and steady-state efficiency will be used as measures of furnace performance.

  7. Blast furnace gas fired boiler for Eregli Iron and Steel Works (Erdemir), Turkey

    SciTech Connect (OSTI)

    Green, J.; Strickland, A.; Kimsesiz, E.; Temucin, I.

    1996-11-01

    Eregli Demir ve Celik Fabriklari T.A.S. (Eregli Iron and Steel Works Inc.), known as Erdemir, is a modern integrated iron and steel works on the Black Sea coast of Turkey, producing flat steel plate. Facilities include two blast furnaces, coke ovens, and hot and cold rolling mills, with a full supporting infrastructure. Four oil- and gas-fired steam boilers provide steam for electric power generation, and to drive steam turbine driven fans for Blast Furnace process air. Two of these boilers (Babcock and Wilcox Type FH) were first put into operation in 1965, and still reliably produce 100 tons/hour of steam at a pressure of 44 bar and a temperature of 410 C. In 1989 Erdemir initiated a Capacity Increase and Modernization Project to increase the steel production capability from two million to three million tons annually. This project also incorporates technology to improve the product quality. Its goals include a reduction in energy expenses to improve Erdemir`s competitiveness. The project`s scheduled completion is in late 1995. The by-product gases of the blast furnaces, coke ovens, and basic oxygen furnaces represent a considerable share of the consumed energy in an integrated iron and steel works. Efficient use of these fuels is an important factor in improving the overall efficiency of the operation.

  8. HVAC Packages for SMSCB

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... Distinctive Characteristics: * Leveraging existing data and DOE resources to characterize SMSCB * Realistic and regionally specific retrofit cost estimation. * Retrofit HVAC ...

  9. Integrated use of burden profile probe and in-burden probe for gas flow control in the blast furnace

    SciTech Connect (OSTI)

    Bordemann, F.; Hartig, W.H.; Grisse, H.J.; Speranza, B.E.

    1995-12-01

    Gas flow in the blast furnace is one of the most important factors in controlling a furnace. It not only determines the production but also the fuel consumption and the campaign life. At Nos. 4 and 5 blast furnaces of ROGESA, probes are installed for detection of the burden profiles and of the gas flow distribution. For an optimum use of these probes a program system has been developed by ROGESA and Dango and Dienenthal. With this program system it is possible to analyze the operating condition of a blast furnace by means of a fuzzy logic analysis. In case of deviations from the defined desired condition, recommendations for corrective measures for the material distribution are made. Both furnaces are equipped with a bell-less top, a coal injection system, high-temperature hot blast stoves with heat recovery and a top gas pressure recovery turbine. Most of the time it is impossible to control all the required parameters. For this reason it is meaningful to measure the actual material distribution at the furnace top by means of a burden profile probe which permits quick and repeated measurements without any retroactive effects. The paper describes the instrumentation of the furnace, correlation of measuring methods, and a program system for analysis of measuring data.

  10. Heat treatment furnace

    DOE Patents [OSTI]

    Seals, Roland D; Parrott, Jeffrey G; DeMint, Paul D; Finney, Kevin R; Blue, Charles T

    2014-10-21

    A furnace heats through both infrared radiation and convective air utilizing an infrared/purge gas design that enables improved temperature control to enable more uniform treatment of workpieces. The furnace utilizes lamps, the electrical end connections of which are located in an enclosure outside the furnace chamber, with the lamps extending into the furnace chamber through openings in the wall of the chamber. The enclosure is purged with gas, which gas flows from the enclosure into the furnace chamber via the openings in the wall of the chamber so that the gas flows above and around the lamps and is heated to form a convective mechanism in heating parts.

  11. Building America Top Innovations 2014 Profile: HVAC Cabinet Air Leakage Test Method

    SciTech Connect (OSTI)

    none,

    2014-11-01

    This 2014 Top Innovation profile describes Building America-funded research by teams and national laboratories that resulted in the development of an ASHRAE standard and a standardized testing method for testing the air leakage of HVAC air handlers and furnace cabinets and has spurred equipment manufacturers to tighten the cabinets they use for residential HVAC systems.

  12. Diagnostics and Control of Natural Gas-Fired furnaces via Flame Image Analysis using Machine Vision & Artificial Intelligence Techniques

    SciTech Connect (OSTI)

    Shahla Keyvan

    2005-12-01

    A new approach for the detection of real-time properties of flames is used in this project to develop improved diagnostics and controls for natural gas fired furnaces. The system utilizes video images along with advanced image analysis and artificial intelligence techniques to provide virtual sensors in a stand-alone expert shell environment. One of the sensors is a flame sensor encompassing a flame detector and a flame analyzer to provide combustion status. The flame detector can identify any burner that has not fired in a multi-burner furnace. Another sensor is a 3-D temperature profiler. One important aspect of combustion control is product quality. The 3-D temperature profiler of this on-line system is intended to provide a tool for a better temperature control in a furnace to improve product quality. In summary, this on-line diagnostic and control system offers great potential for improving furnace thermal efficiency, lowering NOx and carbon monoxide emissions, and improving product quality. The system is applicable in natural gas-fired furnaces in the glass industry and reheating furnaces used in steel and forging industries.

  13. Burden distribution control for maintaining the central gas flow at No. 1 blast furnace in Pohang Works

    SciTech Connect (OSTI)

    Jung, S.K.; Lee, Y.J.; Suh, Y.K.; Ahn, T.J.; Kim, S.M.

    1995-12-01

    The causes for temperature lowering at the upper shaft center in Pohang No. 1 blast furnace were investigated. The test operation with charging notch change in the actual blast furnace and with a 1/12 scale model to Pohang No. 1 blast furnace were carried out in order to improve central gas flow in the shaft. Finally, rebuilding of the lower bunker interior was performed using the results of model experiments. It was confirmed that the main reason for the gas temperature lowering at the upper shaft center was the smaller particle size at center than the wall according to the discharging characteristics of center feed bunker with stone box. The central gas flow could be secured through modifying the stone box in the bunker.

  14. Furnace Blower Performance Improvements - Building America Top Innovation |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Furnace Blower Performance Improvements - Building America Top Innovation Furnace Blower Performance Improvements - Building America Top Innovation This photo shows a circular-shaped blower fan for furnaces and air conditioners. As homeowners switch on their forced-air furnaces in preparation for cold weather, they may be unaware of how furnace blowers can impact HVAC efficiency. In fact, studies show that the most common blowers have efficiencies of only 10%-15%.

  15. Establishing isokinetic flow for a plasma torch exhaust gas diagnostic for a plasma hearth furnace

    SciTech Connect (OSTI)

    Pollack, B.R.

    1996-05-01

    Real time monitoring of toxic metallic effluents in confined gas streams can be accomplished through use of Microwave Induced Plasmas to perform atomic emission spectroscopy, For this diagnostic to be viable it is necessary that it sample from the flowstream of interest in an isokinetic manner. A method of isokinetic sampling was established for this device for use in the exhaust system of a plasma hearth vitrification furnace. The flow and entrained particulate environment were simulated in the laboratory setting using a variable flow duct of the same dimensions (8-inch diameter, schedule 40) as that in the field and was loaded with similar particulate (less than 10 {mu}m in diameter) of lake bed soil typically used in the vitrification process. The flow from the furnace was assumed to be straight flow. To reproduce this effect a flow straightener was installed in the device. An isokinetic sampling train was designed to include the plasma torch, with microwave power input operating at 2.45 GHz, to match local freestream velocities between 800 and 2400 ft/sec. The isokinetic sampling system worked as planned and the plasma torch had no difficulty operating at the required flowrates. Simulation of the particulate suspension was also successful. Steady particle feeds were maintained over long periods of time and the plasma diagnostic responded as expected.

  16. HVAC Installed Performance

    Broader source: Energy.gov [DOE]

    This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question HVAC proper installation energy savings: over-promising or under-delivering?"

  17. Preliminary Results from Electric Arc Furnace Off-Gas Enthalpy Modeling

    SciTech Connect (OSTI)

    Nimbalkar, Sachin U; Thekdi, Arvind; Keiser, James R; Storey, John Morse

    2015-01-01

    This article describes electric arc furnace (EAF) off-gas enthalpy models developed at Oak Ridge National Laboratory (ORNL) to calculate overall heat availability (sensible and chemical enthalpy) and recoverable heat values (steam or power generation potential) for existing EAF operations and to test ORNL s new EAF waste heat recovery (WHR) concepts. ORNL s new EAF WHR concepts are: Regenerative Drop-out Box System and Fluidized Bed System. The two EAF off-gas enthalpy models described in this paper are: 1.Overall Waste Heat Recovery Model that calculates total heat availability in off-gases of existing EAF operations 2.Regenerative Drop-out Box System Model in which hot EAF off-gases alternately pass through one of two refractory heat sinks that store heat and then transfer it to another gaseous medium These models calculate the sensible and chemical enthalpy of EAF off-gases based on the off-gas chemical composition, temperature, and mass flow rate during tap to tap time, and variations in those parameters in terms of actual values over time. The models provide heat transfer analysis for the aforementioned concepts to confirm the overall system and major component sizing (preliminary) to assess the practicality of the systems. Real-time EAF off-gas composition (e.g., CO, CO2, H2, and H2O), volume flow, and temperature data from one EAF operation was used to test the validity and accuracy of the modeling work. The EAF off-gas data was used to calculate the sensible and chemical enthalpy of the EAF off-gases to generate steam and power. The article provides detailed results from the modeling work that are important to the success of ORNL s EAF WHR project. The EAF WHR project aims to develop and test new concepts and materials that allow cost-effective recovery of sensible and chemical heat from high-temperature gases discharged from EAFs.

  18. Minimization of Blast Furnace Fuel Rate by Optimizing Burden and Gas Distributions

    SciTech Connect (OSTI)

    2007-08-01

    This factsheet describes a research project whose proposed CFD model will focus on the complex physics and chemistry found within the upper part of the blast furnace.

  19. Buildings Energy Data Book: 7.3 Efficiency Standards for Residential HVAC

    Buildings Energy Data Book [EERE]

    2 Efficiency Standards for Residential Furnaces AFUE (%) (2) Furnaces (excluding classes noted below) 78 Mobile Home Furnaces 75 Small Furnaces with input rate < 45,000 Btu/hr (1) - Weatherized (outdoor) 78 - Non-Weatherized (indoor) 78 AFUE (%) (2) Non-Weatherized Gas Furnaces 80 Weatherized Gas Furnaces 81 Mobile Home Oil-Fired Furnaces 75 Mobile home Gas Furnaces 80 Non-Weatherized Oil-Fired Furnaces 82 Weatherized Oil-Fired Furnaces 78 Note(s): 1) Excludes those intended solely for

  20. Advanced HVAC Development and Deployment

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of advanced HVAC systems? - "Retrofit-ready" ... - Dehumidification - Water Heating - Ventilation 5 ... Spreadsheet loads and Domestic Hot Water Event Generator. ...

  1. Using Coke Oven Gas in a Blast Furnace Saves Over $6 Million Annually at a Steel Mill (U.S. Steel Edgar Thompson Plant)

    SciTech Connect (OSTI)

    2000-12-01

    Like most steel companies, U.S. Steel (USS) had been using coke oven gas (COG), a by-product of coke manufacturing, as a fuel in their coke ovens, boilers, and reheat furnaces.

  2. Building America Technlogy Solutions for New and Existing Homes: Improving the Field Performance of Natural Gas Furnaces, Chicago, Illinois (Fact Sheet)

    Broader source: Energy.gov [DOE]

    In this project, the PARR research team examined the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces, as measured by steady-state efficiency and AFUE.

  3. Injection of natural gas in the blast furnace at high rates: Field experiments at Armco Steel Company. Topical technical report, January 1990-September 1992

    SciTech Connect (OSTI)

    Agarwall, J.C.; Brown, F.C.; Chin, D.L.; Frydenlund, A.R.

    1993-04-01

    A study of the benefits of the injection of natural gas as a supplemental fuel for commercial blast furnaces is presented. Tests were carried out for sustained periods at natural gas injection levels of 150 and 200 pounds per therm (lb/thm). Average coke replacement ratios of 1.30 pounds of coke per pound of natural gas injected and productivity increases of about 10% were achieved at a gas injection rate of 200 lb/thm. The results were obtained without adverse effects on hot metal chemistry or furnace operability. The ability of natural gas to effectively replace an appreciable amount of coke should enable a decrease in coke production levels.

  4. Direct injection of natural gas in blast furnaces at high rates: Preliminary statistical analysis of blast furnace carbon balance at Armco-Middletown. Topical report, January 1990-September 1992

    SciTech Connect (OSTI)

    Neels, J.K.; Brown, F.C.

    1992-09-01

    The economic benefits of supplemental fuel injections depend, in part, on the coke replacement ratio. An assessment of the accuracy with which blast furnace coke rate may be measured and a determination of the key drivers of coke rate uncertainty are offered, to provide guidance for experiments in high-rate gas injection. Using statistical analysis tools, an expression for the measurement error associated with the various terms of blast furnace carbon balance is developed. Coke rate calculations based on the material balance are most sensitive to coke carbon content and to proper tracking of hot metal tapping schedule.

  5. Alternate HVAC systems and exceptions for QA-Credentialed HVAC Contractor |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Alternate HVAC systems and exceptions for QA-Credentialed HVAC Contractor Alternate HVAC systems and exceptions for QA-Credentialed HVAC Contractor The document outlines alternate HVAC systems and exceptions for QA-Credentialed HVAC Contractor. HVAC Credentialing Alternate HVAC Systems Bulletin 07012015.pdf (409.41 KB) More Documents & Publications ENERGY STAR Certified Homes, Version 3 (Rev. 07) Inspection Checklists for National Program Requirements DOE Zero Energy

  6. Chapter 19: HVAC Controls (DDC/EMS/BAS) Evaluation Protocol

    SciTech Connect (OSTI)

    Romberger, J.

    2014-11-01

    The HVAC Controls Evaluation Protocol is designed to address evaluation issues for direct digital controls/energy management systems/building automation systems (DDC/EMS/BAS) that are installed to control heating, ventilation, and air-conditioning (HVAC) equipment in commercial and institutional buildings. (This chapter refers to the DDC/EMS/BAS measure as HVAC controls.) This protocol may also be applicable to industrial facilities such as clean rooms and labs, which have either significant HVAC equipment or spaces requiring special environmental conditions. This protocol addresses only HVAC-related equipment and the energy savings estimation methods associated with installing such control systems as an energy efficiency measure. The affected equipment includes: Air-side equipment (air handlers, direct expansion systems, furnaces, other heating- and cooling-related devices, terminal air distribution equipment, and fans); Central plant equipment (chillers, cooling towers, boilers, and pumps). These controls may also operate or affect other end uses, such as lighting, domestic hot water, irrigation systems, and life safety systems such as fire alarms and other security systems. Considerable nonenergy benefits, such as maintenance scheduling, system component troubleshooting, equipment failure alarms, and increased equipment lifetime, may also be associated with these systems. When connected to building utility meters, these systems can also be valuable demand-limiting control tools. However, this protocol does not evaluate any of these additional capabilities and benefits.

  7. HVAC design for jails

    SciTech Connect (OSTI)

    Gill, K.E. )

    1994-07-01

    The purpose of this article is to provide an overview of the mechanical, life safety, and IAQ issues in current jail HVAC design. The term jail, as used in this article, is more correctly adult local detention facility, as defined by the American Correctional Association (ACA). It will be used to describe those facilities that (1) are operated at the city and county level by local jurisdictions, not state or federal agencies, and (2) are secure for the detention of both pretrial detainees and sentenced inmates serving terms of less than one year or awaiting assignment to state or federal facilities (prisons).

  8. Higher Efficiency HVAC Motors

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Higher Efficiency HVAC Motors 2016 Building Technologies Office Peer Review PJ Piper, pjpiper@qmpower.com CEO, QM Power, Inc. 2 Project Summary Timeline: Start date: 10/1/14 Planned end date: 9/30/16 Key Milestones 1. Target Application and Machine Specs; 2/13/15 2. Motor Design; 9/30/15 3. Build prototype; 3/31/16 4. Performance validation; 8/1/16 Budget: Total Project $ to Date: * DOE: $239,947 * Cost Share: $189,801 Total Project $: * DOE: $750,000 * Cost Share: $635,756 Key Partners: Project

  9. Advanced steel reheat furnace

    SciTech Connect (OSTI)

    Moyeda, D.; Sheldon, M.; Koppang, R.; Lanyi, M.; Li, X.; Eleazer, B.

    1997-10-01

    Energy and Environmental Research Corp. (EER) under a contract from the Department of Energy is pursuing the development and demonstration of an Advanced Steel Reheating Furnace. This paper reports the results of Phase 1, Research, which has evaluated an advanced furnace concept incorporating two proven and commercialized technologies previously applied to other high temperature combustion applications: EER`s gas reburn technology (GR) for post combustion NOx control; and Air Product`s oxy-fuel enrichment air (OEA) for improved flame heat transfer in the heating zones of the furnace. The combined technologies feature greater production throughput with associated furnace efficiency improvements; lowered NOx emissions; and better control over the furnace atmosphere, whether oxidizing or reducing, leading to better control over surface finish.

  10. ORNL: HVAC Lab Research - 2015 Peer Review | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ORNL: HVAC Lab Research - 2015 Peer Review ORNL: HVAC Lab Research - 2015 Peer Review Presenter: Jeffrey Munk, ORNL View the Presentation PDF icon ORNL: HVAC Lab Research - 2015 ...

  11. HVAC Cabinet Air Leakage Test Method - Building America Top Innovation...

    Energy Savers [EERE]

    HVAC Cabinet Air Leakage Test Method - Building America Top Innovation HVAC Cabinet Air Leakage Test Method - Building America Top Innovation While HVAC installers have improved ...

  12. Development of an Energy Efficient High temperature Natural Gas Fired Furnace

    SciTech Connect (OSTI)

    Dr. Mark G. Stevens; Dr. H. Kenneth Staffin; DOE Project Officer - Keith Bennett

    2005-02-28

    The design concept is designated the ''Porous Wall Radiation Barrier'' heating mantle. In this design, combustion gas flows through a porous wall surrounding the retort, transferring its heat to the porous wall, which then radiates heat energy to the retort. Experiments demonstrate that heat transfer rates of 1.8-2.4 times conventional gas fired mantles are achievable in the temperature range of 1600-2350 degrees fahrenheit.

  13. Case study field evaluation of a systems approach to retrofitting a residential HVAC system

    SciTech Connect (OSTI)

    Walker, Iain S.; McWiliams, Jennifer A.; Konopacki, Steven J.

    2003-09-01

    This case study focusing on a residence in northern California was undertaken as a demonstration of the potential of a systems approach to HVAC retrofits. The systems approach means that other retrofits that can affect the HVAC system are also considered. For example, added building envelope insulation reduces building loads so that smaller capacity HVAC system can be used. Secondly, we wanted to examine the practical issues and interactions with contractors and code officials required to accomplish the systems approach because it represents a departure from current practice. We identified problems in the processes of communication and installation of the retrofit that led to compromises in the final energy efficiency of the HVAC system. These issues must be overcome in order for HVAC retrofits to deliver the increased performance that they promise. The experience gained in this case study was used to optimize best practices guidelines for contractors (Walker 2003) that include building diagnostics and checklists as tools to assist in ensuring the energy efficiency of ''house as a system'' HVAC retrofits. The best practices guidelines proved to be an excellent tool for evaluating the eight existing homes in this study, and we received positive feedback from many potential users who reviewed and used them. In addition, we were able to substantially improve the energy efficiency of the retrofitted case study house by adding envelope insulation, a more efficient furnace and air conditioner, an economizer and by reducing duct leakage.

  14. Pedernales Electric Cooperative- HVAC Rebate Program

    Broader source: Energy.gov [DOE]

    Pedernales Electric Cooperative offers equipment rebates to its members who install energy efficient HVAC equipment. Eligible equipment includes:

  15. Tube furnace

    DOE Patents [OSTI]

    Foster, Kenneth G.; Frohwein, Eugene J.; Taylor, Robert W.; Bowen, David W.

    1991-01-01

    A vermiculite insulated tube furnace is heated by a helically-wound resistance wire positioned within a helical groove on the surface of a ceramic cylinder, that in turn is surroundingly disposed about a doubly slotted stainless steel cylindrical liner. For uniform heating, the pitch of the helix is of shorter length over the two end portions of the ceramic cylinder. The furnace is of large volume, provides uniform temperature, offers an extremely precise programmed heating capability, features very rapid cool-down, and has a modest electrical power requirement.

  16. Better Buildings Neighborhood Program Business Models Guide: HVAC

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Contractor Business Model | Department of Energy HVAC Contractor Business Model Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model. HVAC Contractor Business Model (2.28 MB) More Documents & Publications Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Conclusion Better Buildings Neighborhood Program Business

  17. Furnace assembly

    DOE Patents [OSTI]

    Panayotou, N.F.; Green, D.R.; Price, L.S.

    A method of and apparatus for heating test specimens to desired elevated temperatures for irradiation by a high energy neutron source. A furnace assembly is provided for heating two separate groups of specimens to substantially different, elevated, isothermal temperatures in a high vacuum environment while positioning the two specimen groups symmetrically at equivalent neutron irradiating positions.

  18. Furnace assembly

    DOE Patents [OSTI]

    Panayotou, Nicholas F. (Kennewick, WA); Green, Donald R. (Richland, WA); Price, Larry S. (Pittsburg, CA)

    1985-01-01

    A method of and apparatus for heating test specimens to desired elevated temperatures for irradiation by a high energy neutron source. A furnace assembly is provided for heating two separate groups of specimens to substantially different, elevated, isothermal temperatures in a high vacuum environment while positioning the two specimen groups symmetrically at equivalent neutron irradiating positions.

  19. Residential Condensing Gas Furnaces

    Broader source: Energy.gov [DOE]

    The Department of Energy (DOE) develops standardized data templates for reporting the results of tests conducted in accordance with current DOE test procedures. Templates may be used by third-party laboratories under contract with DOE that conduct testing in support of ENERGY STAR® verification, DOE rulemakings, and enforcement of the federal energy conservation standards.

  20. Consumer Condensing Gas Furnaces

    Broader source: Energy.gov [DOE]

    The Department of Energy (DOE) develops standardized data templates for reporting the results of tests conducted in accordance with current DOE test procedures. Templates may be used by third-party laboratories under contract with DOE that conduct testing in support of ENERGY STAR® verification, DOE rulemakings, and enforcement of the federal energy conservation standards.

  1. Columbia Water & Light- Residential HVAC Rebates

    Broader source: Energy.gov [DOE]

    Columbia Water & Light (CWL) provides residential customers with rebates on energy efficient HVAC equipment. Customers should submit the mechanical permit from a Protective Inspection, a copy...

  2. 1999 Commercial Buildings Characteristics--HVAC Conservation...

    U.S. Energy Information Administration (EIA) Indexed Site

    Center at (202) 586-8800. Energy Information Administration Commercial Buildings Energy Consumption Survey Those commercial buildings that used HVAC conservation features...

  3. Building America Expert Meeting: Transitioning Traditional HVAC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Building America Best Practices Series Volume 16: 40% Whole-House Energy Savings in ...

  4. Building America Expert Meeting: Transitioning Traditional HVAC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Review and validate the general business models for traditional HVAC companies and whole house energy upgrade companies Review preliminary findings on the differences between the ...

  5. Building America Envelope and Advanced HVAC Research | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    under the Moisture Risk Management research area of the Building America roadmap. ... - 2015 BTO Peer Review HVAC R&D Research & Development Roadmap: Emerging HVAC Technologies

  6. Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty...

    Broader source: Energy.gov (indexed) [DOE]

    More Documents & Publications Thermoelectric HVAC for Light-Duty Vehicle Applications Improving efficiency of a vehicle HVAC system with comfort modeling, zonal design, and ...

  7. Improving efficiency of a vehicle HVAC system with comfort modeling...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HVAC system with comfort modeling, zonal design, and thermoelectric devices Improving efficiency of a vehicle HVAC system with comfort modeling, zonal design, and ...

  8. Building America Webinar: HVAC Right-Sizing Part 1-Calculating...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    the key criteria required to create accurate heating and cooling load calculations. ... HVAC Right-Sizing Part 1: Calculating Loads ZERH Webinar: Low Load HVAC in Zero Energy ...

  9. HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer...

    Energy Savers [EERE]

    HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy View the Presentation HVAC, Water Heating, and Appliances ...

  10. HVAC, Water Heating, and Appliance Overview - 2016 BTO Peer Review...

    Energy Savers [EERE]

    HVAC, Water Heating, and Appliance Overview - 2016 BTO Peer Review HVAC, Water Heating, and Appliance Overview - 2016 BTO Peer Review Presenter: Antonio M. Bouza, U.S. Department ...

  11. 2014-04-28 Issuance: Certification of Commercial HVAC, Water...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    28 Issuance: Certification of Commercial HVAC, Water Heating, and Refrigeration Equipment; Final Rule 2014-04-28 Issuance: Certification of Commercial HVAC, Water Heating, and ...

  12. HVAC, Water Heating, and Appliance Subprogram Overview - 2016...

    Office of Environmental Management (EM)

    Heating, and Appliance Subprogram Overview - 2016 BTO Peer Review HVAC, Water Heating, and ... Office's Emerging Technologies: HVAC, Water Heating, and Appliance subprogram. ...

  13. Energy Savings From System Efficiency Improvements in Iowa's HVAC SAVE Program

    SciTech Connect (OSTI)

    Yee, S.; Baker, J.; Brand, L.; Wells, J.

    2013-08-01

    The objective of this project is to explore the energy savings potential of maximizing furnace and distribution system performance by adjusting operating, installation, and distribution conditions. The goal of the Iowa HVAC System Adjusted and Verified Efficiency (SAVE) program is to train contractors to measure installed system efficiency as a diagnostic tool to ensure that the homeowner achieves the energy reduction target for the home rather than simply performing a tune-up on the furnace or having a replacement furnace added to a leaky system. The PARR research team first examined baseline energy usage from a sample of 48 existing homes, before any repairs or adjustments were made, to calculate an average energy savings potential and to determine which system deficiencies were prevalent. The results of the baseline study of these homes found that, on average, about 10% of the space heating energy available from the furnace was not reaching the conditioned space. In the second part of the project, the team examined a sample of 10 homes that had completed the initial evaluation for more in-depth study. For these homes, the diagnostic data shows that it is possible to deliver up to 23% more energy from the furnace to the conditioned space by doing system tune ups with or without upgrading the furnace. Replacing the furnace provides additional energy reduction. The results support the author's belief that residential heating and cooling equipment should be tested and improved as a system rather than a collection of individual components.

  14. Simple Maintenance Saves Costly Furnace Repair/Replacement

    Broader source: Energy.gov [DOE]

    For the past few weeks, my forced-air gas furnace has been on the fritz. I blame this on the fact that I haven't been as diligent as I should have been with regular furnace maintenance.

  15. Efficiency United (Gas) - Commercial Efficiency Program | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Furnace Tune-up: 15-100unit Infrared Heaters: 4MBH Hotel Guest Room Occupancy Sensor: 13unit Demand Control Ventilation: 0.05sq. ft. HVAC Occupancy Sensor: 0.02...

  16. Strategy Guideline. HVAC Equipment Sizing

    SciTech Connect (OSTI)

    Burdick, Arlan

    2012-02-01

    This guide describes the equipment selection of a split system air conditioner and furnace for an example house in Chicago, IL as well as a heat pump system for an example house in Orlando, FL. The required heating and cooling load information for the two example houses was developed in the Department of Energy Building America Strategy Guideline: Accurate Heating and Cooling Load Calculations.

  17. BTO Workshop on Advanced HVAC Research Effort

    Broader source: Energy.gov [DOE]

    The Building Technologies Office (BTO) is exploring the launch of a major HVAC research effort in the area of low global warming potential and non-vapor compression technologies. To support this...

  18. HVAC Efficiency Controls Could Mean Significant Savings

    Broader source: Energy.gov [DOE]

    According to a new report from Pacific Northwest National Lab, commercial building owners could save an average 38 percent on their heating and cooling bills just by installing a few new controls onto their HVAC systems.

  19. HVAC R&D | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    R&D HVAC R&D Lead Performer: Oak Ridge National Laboratory (ORNL) - Oak Ridge, TN FY16 DOE Funding: 2,688,000 Project Term: Ongoing Funding Type: Direct Lab Funding PROJECT ...

  20. A PDI for your HVAC System

    Broader source: Energy.gov [DOE]

    This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question "HVAC proper installation energy savings: over-promising or under-deliverying?"

  1. Furnace Pressure Controllers

    Broader source: Energy.gov [DOE]

    This tip sheet highlights the benefits of precise furnace pressure control in process heating systems.

  2. Emerging Technologies: HVAC, WH and Appliance

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Technologies: HVAC, WH and Appliance BTO Peer Review 2016 Antonio M Bouza antonio.bouza@ee.doe.gov April 5-7, 2016 2 Building Technologies Office (BTO) Ecosystem Codes and Standards Emerging Technologies Residential Buildings Integration Commercial Buildings Integration 3 HVAC, Water Heating and Appliance R&D Strategy: National Labs CRADA projects, FOAs and use of BTO's deployment teams with research homes CRADA : Collaborative Research and Development Agreement More than just discrete

  3. Non-Vapor Compression HVAC Technologies Report

    Broader source: Energy.gov [DOE]

    While vapor-compression technologies have served heating, ventilation, and air-conditioning (HVAC) needs very effectively, and have been the dominant HVAC technology for close to 100 years, the conventional refrigerants used in vapor-compression equipment contribute to global climate change when released to the atmosphere. The Building Technologies Office is evaluating low-global warming potential (GWP) alternatives to vapor-compression technologies.

  4. CBERD: Advanced HVAC Systems | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Advanced HVAC Systems CBERD: Advanced HVAC Systems Left: Environmental chamber to evaluate the performance of air-conditioning systems. Right: Compressor Calorimeter at ORNL. Source: ORNL. Left: Environmental chamber to evaluate the performance of air-conditioning systems. Right: Compressor Calorimeter at ORNL. Source: ORNL. Left: Microchannel heat exchanger co-developed with industry partner Delphi. Right: Large-scale air-to-air exchanger for heat and humidity removal, integrated into a wall

  5. Optimizing Blast Furnace Operation to Increase Efficiency and Lower Costs

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Optimizing Blast Furnace Operation to Increase Efficiency and Lower Costs State-of-the-Art Computational Fluid Dynamics Model Optimizes Fuel Rate in Blast Furnaces The blast furnace (BF) is the most widely used ironmaking process in the U.S. A major advance in BF ironmaking has been the use of pulverized coal which partially replaces metallurgi- cal coke. This results in substantial improvement in furnace effciency and thus the reductions of energy consumption and greenhouse gas emissions.

  6. Two chamber reaction furnace

    DOE Patents [OSTI]

    Blaugher, R.D.

    1998-05-05

    A vertical two chamber reaction furnace is described. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium-copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700 C and 800 C) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800 to 950 C to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product. 2 figs.

  7. Two chamber reaction furnace

    DOE Patents [OSTI]

    Blaugher, Richard D.

    1998-05-05

    A vertical two chamber reaction furnace. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium-copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700.degree. and 800.degree. C.) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800.degree. to 950.degree. C. to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product.

  8. DOE Furnace Rule Ex Parte Communication | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    DOE Furnace Rule Ex Parte Communication Philadelphia Gas Works (POW), the largest ... have on POW, its customers, the City of Philadelphia and the air quality of this region. ...

  9. Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF). Quarterly progress report No. 6, April--June 1993

    SciTech Connect (OSTI)

    Not Available

    1993-08-01

    A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluating the economic and technical feasibility of the concept, and preparing an R&D plan to develop the concept further. The system proposed to meet these goals is a combined-cycle system where air for a gas turbine is indirectly heated to approximately 1800{degree}F in furnaces fired with coal-derived fuels and then directly heated in a natural-gas-fired combustor to about 2400{degree}F. The system is based on a pyrolyzing process that converts the coal into a low-Btu fuel gas and char. The fuel gas is relatively clean, and it is fired to heat tube surfaces that are susceptible to corrosion and problems from ash deposition. In particular, the high-temperature air heater tubes, which will need to be a ceramic material, will be located in a separate furnace or region of a furnace that is exposed to combustion products from the low-Btu fuel gas only.

  10. Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Conclusion

    Broader source: Energy.gov [DOE]

    Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Conclusion, Summary of HVAC Contractor Insights.

  11. Guides and Case Studies for All Climates | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    be improved while reducing utility costs. Project: Improving the Field Performance of Natural Gas Furnaces Technology Focus: HVAC systems, natural gas furnaces Profile: In this...

  12. EECBG Success Story: HVAC Upgrade Saving Money, Protecting History...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HVAC Upgrade Saving Money, Protecting History EECBG Success Story: HVAC Upgrade Saving Money, Protecting History November 2, 2010 - 5:37pm Addthis A new heating and cooling system...

  13. Indirect Benefits (Increased Roof Life and HVAC Savings) from...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Indirect Benefits (Increased Roof Life and HVAC Savings) from a Solar PV System at the San Jos Convention Center Indirect Benefits (Increased Roof Life and HVAC Savings) from a ...

  14. Issue #3: HVAC Proper Installation Energy Savings: Over-Promising...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    3: HVAC Proper Installation Energy Savings: Over-Promising or Under-Delivering? Issue 3: HVAC Proper Installation Energy Savings: Over-Promising or Under-Delivering? What energy ...

  15. Pre-Commercial Demonstration of Cost-Effective Advanced HVAC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Pre-Commercial Demonstration of Cost-Effective Advanced HVAC Controls - 2014 BTO Peer Review Pre-Commercial Demonstration of Cost-Effective Advanced HVAC Controls - 2014 BTO Peer ...

  16. Furnaces Data | Department of Energy

    Energy Savers [EERE]

    Furnaces Data Furnaces Data Furnaces Data Email (79.43 KB) Questions on 2014 LCC spreadsheet 2014-10-28 (378.96 KB) DOE Furnace Rule111414 Email (43.29 KB) 111414 Letter to DOE-c ...

  17. Paired Straight Hearth Furnace

    Broader source: Energy.gov [DOE]

    A coal based dri and molten metal process for long range replacement of blast furnaces and coke ovens

  18. HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Appliances Overview - 2015 BTO Peer Review HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy View the Presentation HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review (801.59 KB) More Documents & Publications HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review HVAC, Water Heating, and Appliance Subprogram Overview - 2016 BTO Peer Review Research & Development Roadmap:

  19. Home Upgrades: Leveraging HVAC Upgrades for Greater Impact (201)

    Broader source: Energy.gov [DOE]

    Better Buildings Residential Network Peer Exchange Call Series: Home Upgrades: Leveraging HVAC Upgrades for Greater Impact (201), November 18, 2015.

  20. HVAC, Water Heating, and Appliances | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Emerging Technologies » HVAC, Water Heating, and Appliances HVAC, Water Heating, and Appliances About the Portfolio The HVAC/Water Heating/Appliance subprogram develops cost effective, energy efficient technologies with national labs and industry partners. Technical analysis has shown that heat pumps have the technical potential to save up to 50% of the energy used by conventional HVAC technologies in residential buildings. Our focus is on the introduction of new heat pumping technologies, heat

  1. Process control techniques for the Sidmar blast furnaces

    SciTech Connect (OSTI)

    Vandenberghe, D.; Bonte, L.; Nieuwerburgh, H. van

    1995-12-01

    The major challenge for modern blast furnace operation is the achievement of a very high productivity, excellent hot metal quality, low fuel consumption and longer blast furnace campaigns. The introduction of predictive models, decision supporting software and expert systems has reduced the standard deviation of the hot metal silicon content. The production loss due to the thermal state of the blast furnace has decreased three times since 1990. An appropriate control of the heat losses with high pulverized coal injection rates, is of the utmost importance for the life of the blast furnace. Different rules for the burden distribution of both blast furnaces are given. At blast furnace A, a peripheral gas flow is promoted, while at blast furnace B a more central gas flow is promoted.

  2. Furnace Standard Analysis Discussion Document

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Standard * Using field intelligence and thoughtful analysis - assess and quantify the effects a regional or national condensing standard for natural gas furnaces could have on energy efficiency and environmental objectives.  Provide insight on the potential impact limiting customer choices for heating systems could have on overall energy usage, cost, and carbon emissions outcomes.  Provide all data, models and sources of information to DOE and other stakeholders, to gain their confidence

  3. Research & Development Roadmap: Emerging HVAC Technologies

    Broader source: Energy.gov [DOE]

    The Research and Development (R&D) Roadmap for Emerging Heating, Ventilation, and Air-Conditioning (HVAC) Technologies provides recommendations to the Building Technologies Office (BTO) on R&D activities to pursue that will aid in achieving BTO’s energy savings goals.

  4. Text-Alternative Version of Building America Webinar: High Performance HVAC

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Systems, Part II: Low-Load HVAC Systems for Single and Multifamily Applications | Department of Energy HVAC Systems, Part II: Low-Load HVAC Systems for Single and Multifamily Applications Text-Alternative Version of Building America Webinar: High Performance HVAC Systems, Part II: Low-Load HVAC Systems for Single and Multifamily Applications High Performance HVAC Systems, Part II: Low-Load HVAC Systems for Single and Multifamily Applications November 16, 2015 Speakers Andrew Poerschke,

  5. Electromelt furnace evaluation

    SciTech Connect (OSTI)

    Reimann, G.A.; Welch, J.M.

    1981-09-01

    An electromelt furnace was designed, built, and operated at the Idaho National Engineering Laboratory to demonstrate the suitability of this equipment for large-scale processing of radioactive wastes in iron-enriched basalt. Several typical waste compositions were melted and cast. The furnace was disassembled and the components evaluated. Calcines and fluorides attacked the furnace lining, unoxidized metals accumulated under the slag, and electrode attrition was high.

  6. Paired Straight Hearth Furnace

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Paired Straight Hearth Furnace A Coal Based DRI and Molten Metal Process for Long Range Replacement of Blast Furnaces and Coke Ovens The U. S. steel industry has reduced its energy intensity per ton of steel shipped by 33% since 1990. However, further signifcant gains in energy effciency will require the development of new, transformational iron and steelmaking processes. The Paired Straight Hearth Furnace (PSH) process is an emerging alterna- tive high productivity, direct reduced iron (DRI)

  7. Questar Gas- Commercial Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Questar Gas provides rebates to its business customers for installing energy efficient food service equipment, laundry equipment, HVAC and water heating equipment, and certain weatherization...

  8. Control strategy optimization of HVAC plants

    SciTech Connect (OSTI)

    Facci, Andrea Luigi; Zanfardino, Antonella; Martini, Fabrizio; Pirozzi, Salvatore; Ubertini, Stefano

    2015-03-10

    In this paper we present a methodology to optimize the operating conditions of heating, ventilation and air conditioning (HVAC) plants to achieve a higher energy efficiency in use. Semi-empiric numerical models of the plant components are used to predict their performances as a function of their set-point and the environmental and occupied space conditions. The optimization is performed through a graph-based algorithm that finds the set-points of the system components that minimize energy consumption and/or energy costs, while matching the user energy demands. The resulting model can be used with systems of almost any complexity, featuring both HVAC components and energy systems, and is sufficiently fast to make it applicable to real-time setting.

  9. The state of HVAC in Mexico

    SciTech Connect (OSTI)

    Roberts, M.M.

    1997-07-01

    With the chartering of the Manual de Anda ASHRAE Chapter in Mexico City, the first chapter in Latin America, and with increasing cross-border trade and investment as a result of NAFTA, it`s important for US and Canadian engineers to understand the state of HVAC technology in Mexico. The goal of this article is to introduce the reader to some industry leaders in Mexico and to show their creative design and installation expertise by reviewing some recent projects.

  10. HVAC Fault Detection and Diagnosis Toolkit

    Energy Science and Technology Software Center (OSTI)

    2004-12-31

    This toolkit supports component-level model-based fault detection methods in commercial building HVAC systems. The toolbox consists of five basic modules: a parameter estimator for model calibration, a preprocessor, an AHU model simulator, a steady-state detector, and a comparator. Each of these modules and the fuzzy logic rules for fault diagnosis are described in detail. The toolbox is written in C++ and also invokes the SPARK simulation program.

  11. Building America Expert Meeting: Transitioning Traditional HVAC Contractors

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    to Whole House Performance Contractors | Department of Energy Transitioning Traditional HVAC Contractors to Whole House Performance Contractors Building America Expert Meeting: Transitioning Traditional HVAC Contractors to Whole House Performance Contractors IBACOS held an Expert Meeting on the topic of Transitioning Traditional HVAC Contractors to Whole House Performance Contractors on March 29, 2011 in San Francisco, CA. The major objectives of the meeting were to: Review and validate the

  12. Integration of HVAC System Design with Simplified Duct Distribution -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Building America Top Innovation | Department of Energy Integration of HVAC System Design with Simplified Duct Distribution - Building America Top Innovation Integration of HVAC System Design with Simplified Duct Distribution - Building America Top Innovation This photo shows framed walls and HVAC distribution systems. This Top Innovation profile describes work by Building America research team IBACOS who field tested simplified duct designs in hundreds of homes, confirming the performance of

  13. enVerid Systems - HVAC Load Reduction | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    enVerid Systems - HVAC Load Reduction enVerid Systems - HVAC Load Reduction Credit: Enverid Systems Credit: Enverid Systems Lead Performer: enVerid Systems Inc. - Houston, TX DOE Funding: $2,400,000 Cost Share: $2,400,000 Project Term: October 1, 2014 - September 30, 2017 Funding Opportunity: DE-FOA-0001084 PROJECT OBJECTIVE The objective is to install and operate modular HVAC Load Reduction (HLR) retrofits in multiple and diverse buildings, monitor their performance, analyze the energy savings

  14. Columbia Water & Light- HVAC and Lighting Efficiency Rebates

    Office of Energy Efficiency and Renewable Energy (EERE)

    Columbia Water & Light (CWL) offers rebates to its commercial and industrial customers for the purchase of high efficiency HVAC installations and efficient lighting. Incentives for certain...

  15. Fabrication of A Quantum Well Based System for Truck HVAC

    Broader source: Energy.gov [DOE]

    Discusses performance differences between conventional modules and quantum well modules and details a conventional HZ-14 device, using bulk bismuth-telluride advantageous for truck HVAC applications.

  16. Building America Top Innovations 2014 Profile: HVAC Cabinet Air...

    Energy Savers [EERE]

    HVAC Cabinet Air Leakage Test Method (top left) Building America teams evaluated several testing methods to identify a robust, repeatable test to recommend for air leakage ...

  17. CBEI: HVAC Packages for Small and Medium Sized Commercial Buildings...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    CBEI: HVAC Packages for Small and Medium Sized Commercial Buildings - 2015 Peer Review Presenter: Russell Taylor, United Technologies Research Center View the Presentation CBEI: ...

  18. Unified HVAC and Refrigeration Control Systems for Small Footprint...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Unified HVAC and Refrigeration Control Systems for Small Footprint Supermarkets Teja ... Approach Approach: Develop control techniques for reducing peak demand and ...

  19. Inverted Attic Bulkhead for HVAC Ductwork, Roseville, California...

    Energy Savers [EERE]

    Inverted Attic Bulkhead for HVAC Ductwork Roseville, California PROJECT INFORMATION ... bathrooms constructed in Roseville, California, for one year as an occupied test home. ...

  20. Development of a High-Efficiency Zonal Thermoelectric HVAC System...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications Improving Energy Efficiency by Developing Components for Distributed Cooling and Heating Based on ...

  1. Energy Efficient HVAC System for Distributed Cooling/Heating...

    Broader source: Energy.gov (indexed) [DOE]

    on Thermal Comfort Modeling Energy Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices Improving Energy Efficiency by Developing Components for ...

  2. Research & Development Opportunities for Joining Technologies in HVAC&R

    Office of Energy Efficiency and Renewable Energy (EERE)

    This report identifies and characterizes R&D opportunities with HVAC&R joining technologies for the Building Technologies Office (BTO) to pursue.

  3. HVAC, Water Heating and Appliances Sub-Program Logic Model

    Broader source: Energy.gov (indexed) [DOE]

    & water heating technologies Researchers equipped with validated solutions to develop or improve components & optimize tech. systems at reduced cost High-efficiency HVAC, water ...

  4. Reduce Air Infiltration in Furnaces (English/Chinese) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01

    Chinese translation of the Reduce Air Infiltration in Furnaces fact sheet. Provides suggestions on how to improve furnace energy efficiency. Fuel-fired furnaces discharge combustion products through a stack or a chimney. Hot furnace gases are less dense and more buoyant than ambient air, so they rise, creating a differential pressure between the top and the bottom of the furnace. This differential, known as thermal head, is the source of a natural draft or negative pressure in furnaces and boilers. A well-designed furnace (or boiler) is built to avoid air leakage into the furnace or leakage of flue gases from the furnace to the ambient. However, with time, most furnaces develop cracks or openings around doors, joints, and hearth seals. These openings (leaks) usually appear small compared with the overall dimensions of the furnace, so they are often ignored. The negative pressure created by the natural draft (or use of an induced-draft fan) in a furnace draws cold air through the openings (leaks) and into the furnace. The cold air becomes heated to the furnace exhaust gas temperature and then exits through the flue system, wasting valuable fuel. It might also cause excessive oxidation of metals or other materials in the furnaces. The heat loss due to cold air leakage resulting from the natural draft can be estimated if you know four major parameters: (1) The furnace or flue gas temperature; (2) The vertical distance H between the opening (leak) and the point where the exhaust gases leave the furnace and its flue system (if the leak is along a vertical surface, H will be an average value); (3) The area of the leak, in square inches; and (4) The amount of operating time the furnace spends at negative pressure. Secondary parameters that affect the amount of air leakage include these: (1) The furnace firing rate; (2) The flue gas velocity through the stack or the stack cross-section area; (3) The burner operating conditions (e.g., excess air, combustion air temperature

  5. Improving the Efficiency of Light-Duty Vehicle HVAC Systems using...

    Broader source: Energy.gov (indexed) [DOE]

    More Documents & Publications Thermoelectric HVAC for Light-Duty Vehicle Applications Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle Applications ...

  6. Paired Straight Hearth Furnace

    SciTech Connect (OSTI)

    2009-04-01

    This factsheet describes a research project whose goals are to design, develop, and evaluate the scalability and commercial feasibility of the PSH Paired Straight Hearth Furnace alternative ironmaking process.

  7. Low-Cost Electrochemical Compressor Utilizing Green Refrigerants for HVAC

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Applications | Department of Energy Electrochemical Compressor Utilizing Green Refrigerants for HVAC Applications Low-Cost Electrochemical Compressor Utilizing Green Refrigerants for HVAC Applications Individual electrochemical compressor cells are arranged in stacks. (Image: Cary Zachary, 2015) Individual electrochemical compressor cells are arranged in stacks. (Image: Cary Zachary, 2015) Electrochemical compressor research unit designed to test component properties. (Image: William

  8. HVAC & Building Management Control System Energy Efficiency Replacements

    SciTech Connect (OSTI)

    Hernandez, Adriana

    2012-09-21

    The project objective was the replacement of an aging, un-repairable HVAC system which has grown inefficient and a huge energy consumer with low energy and efficient HVAC units, and installation of energy efficient building control technologies at City's YMCA Community Center.

  9. Thermoelectric HVAC for Light-Duty Vehicle Applications | Department of

    Broader source: Energy.gov (indexed) [DOE]

    Energy 1 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation ace047_maranville_2011_o.pdf (1.08 MB) More Documents & Publications Thermoelectric HVAC for Light-Duty Vehicle Applications Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle Applications

  10. HVAC Design Strategy for a Hot-Humid Production Builder, Houston, Texas (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-03-01

    BSC worked directly with the David Weekley Homes - Houston division to redesign three floor plans in order to locate the HVAC system in conditioned space. The purpose of this project is to develop a cost effective design for moving the HVAC system into conditioned space. In addition, BSC conducted energy analysis to calculate the most economical strategy for increasing the energy performance of future production houses. This is in preparation for the upcoming code changes in 2015. The builder wishes to develop an upgrade package that will allow for a seamless transition to the new code mandate. The following research questions were addressed by this research project: 1. What is the most cost effective, best performing and most easily replicable method of locating ducts inside conditioned space for a hot-humid production home builder that constructs one and two story single family detached residences? 2. What is a cost effective and practical method of achieving 50% source energy savings vs. the 2006 International Energy Conservation Code for a hot-humid production builder? 3. How accurate are the pre-construction whole house cost estimates compared to confirmed post construction actual cost? BSC and the builder developed a duct design strategy that employs a system of dropped ceilings and attic coffers for moving the ductwork from the vented attic to conditioned space. The furnace has been moved to either a mechanical closet in the conditioned living space or a coffered space in the attic.

  11. High temperature furnace

    DOE Patents [OSTI]

    Borkowski, Casimer J.

    1976-08-03

    A high temperature furnace for use above 2000.degree.C is provided that features fast initial heating and low power consumption at the operating temperature. The cathode is initially heated by joule heating followed by electron emission heating at the operating temperature. The cathode is designed for routine large temperature excursions without being subjected to high thermal stresses. A further characteristic of the device is the elimination of any ceramic components from the high temperature zone of the furnace.

  12. Evaluation of heat flux through blast furnace shell with attached sensors

    SciTech Connect (OSTI)

    Han, J.W.; Lee, J.H.; Suh, Y.K.

    1996-12-31

    Plant trials to evaluate heat fluxes through a lining/cooling system of a blast furnace were conducted in order to realize the cooling efficiency of the blast furnace under operation. For this purpose, several experiments to measure the in-furnace gas temperatures were cautiously made, and numerical simulations for the temperature distributions over the blast furnace shell and cooling/lining systems were also carried out.

  13. Vertical two chamber reaction furnace

    DOE Patents [OSTI]

    Blaugher, R.D.

    1999-03-16

    A vertical two chamber reaction furnace is disclosed. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700 and 800 C) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800 to 950 C to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product. 2 figs.

  14. Vertical two chamber reaction furnace

    DOE Patents [OSTI]

    Blaugher, Richard D.

    1999-03-16

    A vertical two chamber reaction furnace. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium-copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700.degree. and 800.degree. C.) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800.degree. to 950.degree. C. to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product.

  15. Furnace Pressure Controllers; Industrial Technologies Program...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    6 * September 2005 Industrial Technologies Program Furnace Pressure Controllers Furnace draft, or negative pres- sure, is created in fuel-fired furnaces when high temperature gases ...

  16. Purchasing Energy-Efficient Residential Furnaces | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Furnaces Purchasing Energy-Efficient Residential Furnaces The Federal Energy Management Program (FEMP) provides acquisition guidance for residential furnaces, a product category ...

  17. Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Introduction

    Broader source: Energy.gov [DOE]

    Better Buildings Neighborhood Program Business Models Guide: HVAC Contractor Business Model Introduction.

  18. Classroom HVAC: Improving ventilation and saving energy -- field study plan

    SciTech Connect (OSTI)

    Apte, Michael G.; Faulkner, David; Hodgson, Alfred T.; Sullivan, Douglas P.

    2004-10-14

    The primary goals of this research effort are to develop, evaluate, and demonstrate a very practical HVAC system for classrooms that consistently provides classrooms (CRs) with the quantity of ventilation in current minimum standards, while saving energy, and reducing HVAC-related noise levels. This research is motivated by the public benefits of energy efficiency, evidence that many CRs are under-ventilated, and public concerns about indoor environmental quality in CRs. This document provides a summary of the detailed plans developed for the field study that will take place in 2005 to evaluate the energy and IAQ performance of a new classroom HVAC technology. The field study will include measurements of HVAC energy use, ventilation rates, and IEQ conditions in 10 classrooms with the new HVAC technology and in six control classrooms with a standard HVAC system. Energy use and many IEQ parameters will be monitored continuously, while other IEQ measurements will be will be performed seasonally. Continuously monitored data will be remotely accessed via a LonWorks network. Instrument calibration plans that vary with the type of instrumentation used are established. Statistical tests will be employed to compare energy use and IEQ conditions with the new and standard HVAC systems. Strengths of this study plan include the collection of real time data for a full school year, the use of high quality instrumentation, the incorporation of many quality control measures, and the extensive collaborations with industry that limit costs to the sponsors.

  19. The Impact of Uncertain Physical Parameters on HVAC Demand Response

    SciTech Connect (OSTI)

    Sun, Yannan; Elizondo, Marcelo A.; Lu, Shuai; Fuller, Jason C.

    2014-03-01

    HVAC units are currently one of the major resources providing demand response (DR) in residential buildings. Models of HVAC with DR function can improve understanding of its impact on power system operations and facilitate the deployment of DR technologies. This paper investigates the importance of various physical parameters and their distributions to the HVAC response to DR signals, which is a key step to the construction of HVAC models for a population of units with insufficient data. These parameters include the size of floors, insulation efficiency, the amount of solid mass in the house, and efficiency of the HVAC units. These parameters are usually assumed to follow Gaussian or Uniform distributions. We study the effect of uncertainty in the chosen parameter distributions on the aggregate HVAC response to DR signals, during transient phase and in steady state. We use a quasi-Monte Carlo sampling method with linear regression and Prony analysis to evaluate sensitivity of DR output to the uncertainty in the distribution parameters. The significance ranking on the uncertainty sources is given for future guidance in the modeling of HVAC demand response.

  20. Heat recovery and the economizer for HVAC systems

    SciTech Connect (OSTI)

    Anantapantula, V.S. . Alco Controls Div.); Sauer, H.J. Jr. )

    1994-11-01

    This articles examines why a combined heat reclaim/economizer system with priority to heat reclaim operation is most likely to result in the least annual total HVAC energy. PC-based, hour-by-hour simulation programs evaluate annual HVAC energy requirements when using combined operation of heat reclaim and economizer cycle, while giving priority to operation of either one. These simulation programs also enable the design engineer to select the most viable heat reclaim and/or economizer system for any given type of HVAC system serving the building internal load level, building geographical location and other building/system variables.

  1. NETL Sorbents Licensed to Help Lower Power Draw of HVAC

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sorbents Licensed To Help Lower Power Draw of HVAC Success Story NETL has licensed one of its patented CO 2 - removal sorbents to Boston-based technology company enVerid Systems. enVerid has adopted the sorbent for use in their proprietary Heat Load Reduction (HLR) module, a retrofit air-recirculation system it designed to increase the energy efficiency of commercial HVAC (heating, ventilation, and air conditioning) systems. HVAC is one of the largest draws of electric power in the United

  2. SURFACE INDUSTRIAL HVAC SYSTEM DESCRIPTION DOCUMENT

    SciTech Connect (OSTI)

    M.M. Ansari

    2005-04-05

    The purpose of this system description document (SDD) is to establish requirements that drive the design of the surface industrial heating, ventilation, and air-conditioning (HVAC) system and its bases to allow the design effort to proceed to license application. This SDD will be revised at strategic points as the design matures. This SDD identifies the requirements and describes the system design, as it currently exists, with emphasis on attributes of the design provided to meet the requirements. This SDD is an engineering tool for design control; accordingly, the primary audience and users are design engineers. This SDD is part of an iterative design process. It leads the design process with regard to the flowdown of upper tier requirements onto the system. Knowledge of these requirements is essential to performing the design process. The SDD follows the design with regard to the description of the system. The description that provided in this SDD reflects the current results of the design process.

  3. Thermal model of solar absorption HVAC systems

    SciTech Connect (OSTI)

    Bergquam, J.B.; Brezner, J.M.

    1995-11-01

    This paper presents a thermal model that describes the performance of solar absorption HVAC systems. The model considers the collector array, the building cooling and heating loads, the absorption chiller and the high temperature storage. Heat losses from the storage tank and piping are included in the model. All of the results presented in the paper are for an array of flat plate solar collectors with black chrome (selective surface) absorber plates. The collector efficiency equation is used to calculate the useful heat output from the array. The storage is modeled as a non-stratified tank with polyurethane foam insulation. The system is assumed to operate continuously providing air conditioning during the cooling season, space heating during the winter and hot water throughout the year. The amount of heat required to drive the chiller is determined from the coefficient of performance of the absorption cycle. Results are presented for a typical COP of 0.7. The cooling capacity of the chiller is a function of storage (generator) temperature. The nominal value is 190 F (88 C) and the range of values considered is 180 F (82 C) to 210 F (99 C). Typical building cooling and heating loads are determined as a function of ambient conditions. Performance results are presented for Sacramento, CA and Washington, D.C. The model described in the paper makes use of National Solar Radiation Data Base (NSRDB) data and results are presented for these two locations. The uncertainties in the NSRDB are estimated to be in a range of 6% to 9%. This is a significant improvement over previously available data. The model makes it possible to predict the performance of solar HVAC systems and calculate quantities such as solar fraction, storage temperature, heat losses and parasitic power for every hour of the period for which data are available.

  4. Improved graphite furnace atomizer

    DOE Patents [OSTI]

    Siemer, D.D.

    1983-05-18

    A graphite furnace atomizer for use in graphite furnace atomic absorption spectroscopy is described wherein the heating elements are affixed near the optical path and away from the point of sample deposition, so that when the sample is volatilized the spectroscopic temperature at the optical path is at least that of the volatilization temperature, whereby analyteconcomitant complex formation is advantageously reduced. The atomizer may be elongated along its axis to increase the distance between the optical path and the sample deposition point. Also, the atomizer may be elongated along the axis of the optical path, whereby its analytical sensitivity is greatly increased.

  5. Building America Webinar: HVAC Right-Sizing Part 1-Calculating Loads |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy HVAC Right-Sizing Part 1-Calculating Loads Building America Webinar: HVAC Right-Sizing Part 1-Calculating Loads During this webinar, Building America Research Team IBACOS highlighted the key criteria required to create accurate heating and cooling load calculations. Current industry rules of thumb, perceptions and barriers to right-sizing HVAC were also discussed. webinar_hvac_calculatingloads_20110428.wmv (15.62 MB) More Documents & Publications HVAC Right-Sizing

  6. Furnace Blower Performance Improvements - Building America Top...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Furnace Blower Performance Improvements - Building America Top Innovation Furnace Blower Performance Improvements - Building America Top Innovation This photo shows a ...

  7. EECBG Success Story: HVAC Upgrade Saving Money, Protecting History

    Broader source: Energy.gov [DOE]

    With financial support from a $250,000 PA Conservation Works! grant – funded through the federal Energy Efficiency and Conservation Block Grant program and the Recovery Act – CCHS purchased a new Desert-Aire HVAC system. Learn more.

  8. Strategy Guideline. Transitioning HVAC Companies to Whole House Performance Contractors

    SciTech Connect (OSTI)

    Burdick, Arlan

    2012-05-01

    This report describes the findings from research IBACOS conducted related to heating, ventilation, and air conditioning (HVAC) companies who have made the decision to transition to whole house performance contracting (WHPC).

  9. Strategy Guideline: Transitioning HVAC Companies to Whole House Performance Contractors

    SciTech Connect (OSTI)

    Burdick, A.

    2012-05-01

    This report describes the findings from research IBACOS conducted related to heating, ventilation, and air conditioning (HVAC) companies who have made the decision to transition to whole house performance contracting (WHPC).

  10. Review of Residential Low-Load HVAC Systems

    SciTech Connect (OSTI)

    Brown, Scott A.; Thornton, Brian; Widder, Sarah H.

    2013-09-01

    In support of the U.S. Department of Energy’s (DOE’s) Building America Program, Pacific Northwest National Laboratory (PNNL) conducted an investigation to inventory commercially available HVAC technologies that are being installed in low-load homes. The first step in this investigation was to conduct a review of published literature to identify low-load HVAC technologies available in the United States and abroad, and document the findings of existing case studies that have evaluated the performance of the identified technologies. This report presents the findings of the literature review, identifies gaps in the literature or technical understanding that must be addressed before low-load HVAC technologies can be fully evaluated, and introduces PNNL’s planned research and analysis for this project to address identified gaps and potential future work on residential low-load HVAC systems.

  11. Integration of HVAC System Design with Simplified Duct Distribution...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HVAC system layout early in the design process.in order to realize the successful ... Graphic courtesy of IBACOS, Inc. A "Plug-n-Play" Air Delivery System for Low-Load ...

  12. Two Alabama Elementary Schools Get Cool with New HVAC Units

    Broader source: Energy.gov [DOE]

    Addison Elementary School and Double Springs Elementary School in northwestern Alabama were warm. Some classrooms just didn’t cool fast enough. The buildings, which were built almost 20 years ago, were in need of new HVAC units.

  13. BTO Workshop on Advanced HVAC Research Effort | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Office (BTO) is exploring the launch of a major HVAC research effort in the area of low global warming potential and non-vapor compression technologies. To support this endeavor,...

  14. Advanced steel reheat furnaces: Research and development. Final report

    SciTech Connect (OSTI)

    Nguyen, Q.; Koppang, R.; Maly, P.; Moyeda, D.; Li, X.

    1999-01-14

    The purpose of this report is to present the results of two phases of a three-phase project to develop and evaluate an Advanced Steel Reheat Furnace (SSRF) concept which incorporates two proven and commercialized technologies, oxy-fuel enriched air (OEA) combustion and gas reburning (GR). The combined technologies aim to improve furnace productivity with higher flame radiant heat transfer in the heating zones of a steel reheat furnace while controlling potentially higher NOx emissions from these zones. The project was conducted under a contract sponsored by the Department of Energy (DOE). Specifically, this report summarizes the results of a modeling study and an experimental study to define and evaluate the issues which affect the integration and performance of the combined technologies. Section 2.0 of the report describes the technical approach uses in the development and evaluation of the advanced steel reheat furnace. Section 3.0 presents results of the modeling study applied to a model steel furnace. Experimental validation of the modeling results obtained from EER`s Fuel Evaluation Facility (FEF) pilot-scale furnace discussed in Section 4.0. Section 5.0 provides an economic evaluation on the cost effectiveness of the advanced reheat furnace concept. Section 6.0 concludes the report with recommendations on the applicability of the combined technologies of steel reheat furnaces.

  15. Building America Best Practices Series Vol. 14: Energy Renovations - HVAC:

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    A Guide for Contractors to Share with Homeowners | Department of Energy Vol. 14: Energy Renovations - HVAC: A Guide for Contractors to Share with Homeowners Building America Best Practices Series Vol. 14: Energy Renovations - HVAC: A Guide for Contractors to Share with Homeowners This guide, which is part of a series of Best Practices guides produced by DOE's Building America program, describes ways homeowners can reduce their energy costs and improve the comfort, health, and safety of their

  16. Nationwide Limited Public Interest Waiver for LED and HVAC Units |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Limited Public Interest Waiver for LED and HVAC Units Nationwide Limited Public Interest Waiver for LED and HVAC Units eere_nationwide_public_interest_waiver (55.98 KB) More Documents & Publications Nationwide Nonavailability Waiver: February 11, 2010 (Please note, the waiver for LED traffic signals has been withdrawn effective December 1, 2010) Nationwide Nonavailability Waiver: November 5, 2010 Amended Nationwide Nonavailability Waiver: November 5

  17. Operational results of shaft repair by installing stave type cooler at Kimitsu Nos. 3 and 4 blast furnaces

    SciTech Connect (OSTI)

    Oda, Hiroshi; Amano, Shigeru; Sakamoto, Aiichiro; Anzai, Osamu; Nakagome, Michiru; Kuze, Toshisuke; Imuta, Akira

    1997-12-31

    Nos. 3 and 4 blast furnaces in Nippon Steel Corporation Kimitsu Works were both initially fitted with cooling plate systems. With the aging of each furnace, the damage to their respective inner-shaft profiles had become serious. Thus, in order to prevent operational change and prolong the furnace life, the inner-shaft profile of each furnace was repaired by replacing the former cooling plate system with the stave type cooler during the two-week-shutdowns. With this repair, stability of burden descent and gas flow near the wall part of the furnace have been achieved. Thus the prolongation of the furnace life is naturally expected.

  18. HVAC design considerations for cold climates

    SciTech Connect (OSTI)

    Armstrong, R.S. )

    1993-09-01

    The design of heating, ventilating and air-conditioning (HVAC) systems in cold climate areas requires modifications to the standard designs used in more temperate climates. While most of the US experiences freezing temperatures at least once during the winter months, certain areas experience several months of extended cold. No single location in the US experiences these extended cold conditions more than Alaska. While most areas in the continental US will not require modifications to standard design guidelines, many design modifications commonly used in the Arctic regions of Alaska and Canada can also be applied to any cold climate area in the continental US. The geographic area of Alaska is about one-third the size of the continental US. Climatic extremes range from Ketchikan with 6.697 heating degree days (at 55[degree]21 minutes N latitude) to Barrow with 20,341 heating degree days (at 71[degree]18 minutes N latitude), according to the Arctic Environmental Information and Data Center. The suggestions in this article are a compilation of general approaches the authors used to address the challenge of cold climate design. Of course, each detail design must be adapted to the specific climate and application at hand.

  19. VARIABLE SPEED INTEGRATED INTELLIGENT HVAC BLOWER

    SciTech Connect (OSTI)

    Shixiao Wang; Herman Wiegman; Wilson Wu; John Down; Luana Iorio; Asha Devarajan; Jing Wang; Ralph Carl; Charlie Stephens; Jeannine Jones; Paul Szczesny

    2001-11-14

    This comprehensive topical report discusses the key findings in the development of a intelligent integrated blower for HVAC applications. The benefits of rearward inclined blades over that of traditional forward inclined blades is well documented and a prototype blower design is presented. A comparison of the proposed blower to that of three typical units from the industry is presented. The design of the blower housing is also addressed and the impact of size limitations on static efficiency is discussed. Issues of air flow controllability in the rearward inclined blower is addressed and a solution to this problem is proposed. Several motor design options are discussed including inside-out radial flux designs and novel axial flux designs, all are focused on the various blower needs. The control of the motor-blower and airflow through the use of a high density inverter stage and modern digital signal processor is presented. The key technical challenges of the approach are discussed. The use of the motor as a sensor in the larger heating/ventilating system is also discussed. Diagnostic results for both the motor itself and the blower system are presented.

  20. R&D Opportunity Assessment: Joining Technologies in HVAC&R - Workshop on

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Joining Technologies in HVAC&R | Department of Energy R&D Opportunity Assessment: Joining Technologies in HVAC&R - Workshop on Joining Technologies in HVAC&R R&D Opportunity Assessment: Joining Technologies in HVAC&R - Workshop on Joining Technologies in HVAC&R Presenter: William Goetzler, Navigant Consulting On June 14, 2015, the U.S. Department of Energy organized a workshop "Joining Technologies in HVAC&R." The purpose of the meeting was for the

  1. Tips: Natural Gas and Oil Heating Systems | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Furnaces and boilers Oil-fired boilers and furnaces Gas-fired boilers and furnaces ... Federal tax credits are available for geothermal heat pumps through 2016. Learn more. Federal ...

  2. Blast Furnace Granulated Coal Injection

    SciTech Connect (OSTI)

    1998-09-30

    Production levels on each furnace exceeded 7000 NTHM/day during July. The combined production of 14,326 was a result of lower coke rates and below average delay rates on both furnaces, The combined production was at its highest level since September 1997. In August, the combined productivity declined to less than 13,500 NTHM/day. Although D furnace maintained a production rate in excess of 7000 NTHM/day, C furnace was lower because of a castfloor breakout and subsequent five day repair from August 26-30. Despite the lower productivity in August, injected coal and furnace coke rates were very good during the month. During September, the operation was difficult as a result of higher delays on both furnaces. The combined average monthly delay rate was considerably above the twenty-month average of 113 minutes per day and the combined average monthly production was less than 14,000 NTHM/day. Higher furnace coke rates at lower coal injection levels also contributed to the decrease. Additionally, the coke rate on both furnaces was increased substantially and the injected coal rate was decreased in preparation for the high volatile Colorado coal trial that started on September 28. The furnace process results for this quarter are shown in Tables 1A and 1B. In addition, the last twelve months of injected coal and coke rates for each furnace are shown in Figures 1 and 2.

  3. Hydronic Heating Coil Versus Propane Furnace, Rehoboth Beach, Delaware (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-01-01

    Insight Homes constructed two houses in Rehoboth Beach, Delaware, with identical floor plans and thermal envelopes but different heating and domestic hot water (DHW) systems. Each house is 1,715-ft2 with a single story, three bedrooms, two bathrooms, and the heating, ventilation, and air conditioning (HVAC) systems and ductwork located in conditioned crawlspaces. The standard house, which the builder offers as its standard production house, uses an air source heat pump (ASHP) with supplemental propane furnace heating. The Building America test house uses the same ASHP unit with supplemental heat provided by the DHW heater (a combined DHW and hydronic heating system, where the hydronic heating element is in the air handler). Both houses were occupied during the test period. Results indicate that efficiency of the two heating systems was not significantly different. Three issues dominate these results; lower system design performance resulting from the indoor refrigerant coil selected for the standard house, an incorrectly functioning defrost cycle in the standard house, and the low resolution of the natural gas monitoring equipment. The thermal comfort of both houses fell outside the ASHRAE Standard 55 heating range but was within the ACCA room-to-room temperature range when compared to the thermostat temperature. The monitored DHW draw schedules were input into EnergyPlus to evaluate the efficiency of the tankless hot water heater model using the two monitored profiles and the Building America House Simulation Protocols. The results indicate that the simulation is not significantly impacted by the draw profiles.

  4. Non-carbon induction furnace

    DOE Patents [OSTI]

    Holcombe, C.E.; Masters, D.R.; Pfeiler, W.A.

    1984-01-06

    The present invention is directed to an induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of non-carbon materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloys. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an rf induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650/sup 0/C for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.

  5. Carbon-free induction furnace

    DOE Patents [OSTI]

    Holcombe, Cressie E.; Masters, David R.; Pfeiler, William A.

    1985-01-01

    An induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of carbon free materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloy. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an RF induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650.degree. C. for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.

  6. Post combustion trials at Dofasco's KOBM furnace

    SciTech Connect (OSTI)

    Farrand, B.L.; Wood, J.E.; Goetz, F.J.

    1992-01-01

    Post combustion trials were conducted at Dofasco's 300 tonne KOBM furnace as part of the AISI Direct Steelmaking Program. The purpose of the project work was to measure the post combustion ratio (PCR) and heat transfer efficiency (HTE) of the post combustion reaction in a full size steelmaking vessel. A method of calculating PCR and HTE using off gas analysis and gas temperature was developed. The PCR and HTE were determined under normal operating conditions. Trials assessed the effect of lance height, vessel volume, foaming slag and pellet additions on PCR and HTE.

  7. HIGH TEMPERATURE MICROSCOPE AND FURNACE

    DOE Patents [OSTI]

    Olson, D.M.

    1961-01-31

    A high-temperature microscope is offered. It has a reflecting optic situated above a molten specimen in a furnace and reflecting the image of the same downward through an inert optic member in the floor of the furnace, a plurality of spaced reflecting plane mirrors defining a reflecting path around the furnace, a standard microscope supported in the path of and forming the end terminus of the light path.

  8. WaterFurnace Renewable Energy Inc formerly WaterFurnace Industries...

    Open Energy Info (EERE)

    WaterFurnace Renewable Energy Inc formerly WaterFurnace Industries Inc WFI Jump to: navigation, search Name: WaterFurnace Renewable Energy Inc (formerly: WaterFurnace Industries,...

  9. HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review ...

    Energy Savers [EERE]

    HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy This ...

  10. Building America Whole-House Solutions for New Homes: HVAC Design...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HVAC Design Strategy for a Hot-Humid Production Builder Building America Whole-House Solutions for New Homes: HVAC Design Strategy for a Hot-Humid Production Builder In this ...

  11. Critical Question #4: What are the Best Off-the-Shelf HVAC Solutions...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HVAC Solutions for Low-Load, High-Performance Homes and Apartments? Critical Question 4: What are the Best Off-the-Shelf HVAC Solutions for Low-Load, High-Performance Homes ...

  12. CoolCab Test and Evaluation and CoolCalc HVAC Tool Development...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Test and Evaluation and CoolCalc HVAC Tool Development CoolCab Test and Evaluation and CoolCalc HVAC Tool Development 2013 DOE Hydrogen and Fuel Cells Program and Vehicle ...

  13. DOE and Stakeholders Ponder Best Approach to Major HVAC&R Research...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Stakeholders Ponder Best Approach to Major HVAC&R Research Effort DOE and Stakeholders Ponder Best Approach to Major HVAC&R Research Effort January 15, 2016 - 11:27am Addthis...

  14. CoolCab Thermal Load Reduction Project: CoolCalc HVAC Tool Development...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Thermal Load Reduction Project: CoolCalc HVAC Tool Development CoolCab Thermal Load Reduction Project: CoolCalc HVAC Tool Development 2010 DOE Vehicle Technologies and Hydrogen...

  15. Modelling of multiphase flow in ironmaking blast furnace

    SciTech Connect (OSTI)

    Dong, X.F.; Yu, A.B.; Burgess, J.M.; Pinson, D.; Chew, S.; Zulli, P.

    2009-01-15

    A mathematical model for the four-phase (gas, powder, liquid, and solids) flow in a two-dimensional ironmaking blast furnace is presented by extending the existing two-fluid flow models. The model describes the motion of gas, solid, and powder phases, based on the continuum approach, and implements the so-called force balance model for the flow of liquids, such as metal and slag in a blast furnace. The model results demonstrate a solid stagnant zone and dense powder hold-up region, as well as a dense liquid flow region that exists in the lower part of a blast furnace, which are consistent with the experimental observations reported in the literature. The simulation is extended to investigate the effects of packing properties and operational conditions on the flow and the volume fraction distribution of each phase in a blast furnace. It is found that solid movement has a significant effect on powder holdup distribution. Small solid particles and low porosity distribution are predicted to affect the fluid flow considerably, and this can cause deterioration in bed permeability. The dynamic powder holdup in a furnace increases significantly with the increase of powder diameter. The findings should be useful to better understand and control blast furnace operations.

  16. Report on HVAC option selections for a relocatable classroom energy and indoor environmental quality field study

    SciTech Connect (OSTI)

    Apte, Michael G.; Delp, Woody W.; Diamond, Richard C.; Hodgson, Alfred T.; Kumar, Satish; Rainer, Leo I.; Shendell, Derek G.; Sullivan, Doug P.; Fisk, William J.

    2001-10-11

    It is commonly assumed that efforts to simultaneously develop energy efficient building technologies and to improve indoor environmental quality (IEQ) are unfeasible. The primary reason for this is that IEQ improvements often require additional ventilation that is costly from an energy standpoint. It is currently thought that health and productivity in work and learning environments requires adequate, if not superior, IEQ. Despite common assumptions, opportunities do exist to design building systems that provide improvements in both energy efficiency and IEQ. This report outlines the selection of a heating, ventilation, and air conditioning (HVAC) system to be used in demonstrating such an opportunity in a field study using relocatable school classrooms. Standard classrooms use a common wall mounted heat pump HVAC system. After reviewing alternative systems, a wall-mounting indirect/direct evaporative cooling system with an integral hydronic gas heating is selected. The anticipated advantages of this system include continuous ventilation of 100 percent outside air at or above minimum standards, projected cooling energy reductions of about 70 percent, inexpensive gas heating, improved airborne particle filtration, and reduced peak load electricity use. Potential disadvantages include restricted climate regions and possible increases in indoor relative humidity levels under some conditions.

  17. Plasma furnace treatment of metallurgical by-product streams

    SciTech Connect (OSTI)

    Whellock, J.G.; Heanley, C.P.; Chapman, C.S.

    1997-12-31

    It is a common misconception that plasma furnace technology only has application for exotic and very high temperature processes. With the increasing importance placed on waste minimization and the environmental constraints imposed on heavy metals present in byproducts from mainstream operations, plasma technology is finding widespread application. Tetronics is a premier supplier of plasma tundish heating systems for the steel industry. More recently the company has found growing interest in electric arc furnace dust treatment, lead blast furnace slag treatment and metal recovery, copper, nickel and cobalt scavenging from primary smelter slags, dross treatment, platinum group metals (PGM) recovery from catalysts and vitrification and detoxification of heavy metal contaminated waste byproducts. The principal advantages of the plasma arc technology are the close metallurgical control of the furnace environment, minimal off-gas handling requirements and overall high energy efficiency of the processes. A number of applications in the ferrous and non-ferrous metals industry are described.

  18. Operating experience with 100% pellet burden on Amanda blast furnace

    SciTech Connect (OSTI)

    Keaton, D.E.; Minakawa, T. . Ironmaking Dept.)

    1993-01-01

    A number of significant changes in operations at the Ashland Works of the Armco Steel Company occurred in 1992 which directly impacted the Amanda Blast Furnace operation. These changes included the shutdown of the hot strip mill which resulted in coke oven gas enrichment of the Amanda stoves and an increase of 75 C in hot blast temperature, transition to 100% continuous cast operation which resulted in increased variation of the hot metal demand, and the July idling of the sinter plant. Historically, the Amanda Blast Furnace burden was 30% fluxed sinter and 70% acid pellet. It was anticipated that the change to 100% pellet burden would require changes in charging practice and alter furnace performance. The paper gives a general furnace description and then describes the burden characteristics, operating practice with 30% sinter/70% acid pellet burden, preparations for the 100% acid pellet burden operation, the 100% acid pellet operation, and the 100% fluxed pellet burden operation.

  19. DOE Convening Report on Certification of Commercial HVAC and CRE Products |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Convening Report on Certification of Commercial HVAC and CRE Products DOE Convening Report on Certification of Commercial HVAC and CRE Products This document is the convening report on the feasibility of a negotiated rulemaking to revise the certification program for commercial HVAC and CRE products published on October 2, 2012. convening_report_hvac_cre_1.pdf (1.01 MB) More Documents & Publications Lochinvar Preliminary Plan Comments Comment On:

  20. Precision control of high temperature furnaces using an auxiliary power supply and charged particle current flow

    DOE Patents [OSTI]

    Pollock, G.G.

    1997-01-28

    Two power supplies are combined to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved. 5 figs.

  1. Precision control of high temperature furnaces using an auxiliary power supply and charged practice current flow

    DOE Patents [OSTI]

    Pollock, George G.

    1997-01-01

    Two power supplies are combined to control a furnace. A main power supply heats the furnace in the traditional manner, while the power from the auxiliary supply is introduced as a current flow through charged particles existing due to ionized gas or thermionic emission. The main power supply provides the bulk heating power and the auxiliary supply provides a precise and fast power source such that the precision of the total power delivered to the furnace is improved.

  2. Cupola Furnace Computer Process Model

    SciTech Connect (OSTI)

    Seymour Katz

    2004-12-31

    The cupola furnace generates more than 50% of the liquid iron used to produce the 9+ million tons of castings annually. The cupola converts iron and steel into cast iron. The main advantages of the cupola furnace are lower energy costs than those of competing furnaces (electric) and the ability to melt less expensive metallic scrap than the competing furnaces. However the chemical and physical processes that take place in the cupola furnace are highly complex making it difficult to operate the furnace in optimal fashion. The results are low energy efficiency and poor recovery of important and expensive alloy elements due to oxidation. Between 1990 and 2004 under the auspices of the Department of Energy, the American Foundry Society and General Motors Corp. a computer simulation of the cupola furnace was developed that accurately describes the complex behavior of the furnace. When provided with the furnace input conditions the model provides accurate values of the output conditions in a matter of seconds. It also provides key diagnostics. Using clues from the diagnostics a trained specialist can infer changes in the operation that will move the system toward higher efficiency. Repeating the process in an iterative fashion leads to near optimum operating conditions with just a few iterations. More advanced uses of the program have been examined. The program is currently being combined with an ''Expert System'' to permit optimization in real time. The program has been combined with ''neural network'' programs to affect very easy scanning of a wide range of furnace operation. Rudimentary efforts were successfully made to operate the furnace using a computer. References to these more advanced systems will be found in the ''Cupola Handbook''. Chapter 27, American Foundry Society, Des Plaines, IL (1999).

  3. Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF). Volume 1, Final report

    SciTech Connect (OSTI)

    1996-02-01

    A major objective of the coal-fired high performance power systems (HIPPS) program is to achieve significant increases in the thermodynamic efficiency of coal use for electric power generation. Through increased efficiency, all airborne emissions can be decreased, including emissions of carbon dioxide. High Performance power systems as defined for this program are coal-fired, high efficiency systems where the combustion products from coal do not contact the gas turbine. Typically, this type of a system will involve some indirect heating of gas turbine inlet air and then topping combustion with a cleaner fuel. The topping combustion fuel can be natural gas or another relatively clean fuel. Fuel gas derived from coal is an acceptable fuel for the topping combustion. The ultimate goal for HIPPS is to, have a system that has 95 percent of its heat input from coal. Interim systems that have at least 65 percent heat input from coal are acceptable, but these systems are required to have a clear development path to a system that is 95 percent coal-fired. A three phase program has been planned for the development of HIPPS. Phase 1, reported herein, includes the development of a conceptual design for a commercial plant. Technical and economic feasibility have been analysed for this plant. Preliminary R&D on some aspects of the system were also done in Phase 1, and a Research, Development and Test plan was developed for Phase 2. Work in Phase 2 include s the testing and analysis that is required to develop the technology base for a prototype plant. This work includes pilot plant testing at a scale of around 50 MMBtu/hr heat input. The culmination of the Phase 2 effort will be a site-specific design and test plan for a prototype plant. Phase 3 is the construction and testing of this plant.

  4. CenterPoint Energy (Gas)- Residential Heating and Hot Water Rebates

    Office of Energy Efficiency and Renewable Energy (EERE)

    CenterPoint Energy offers gas heating and water heating equipment rebates to its residential customers. Eligible equipment includes furnaces, back-up furnace systems, hydronic heaters, storage...

  5. Paired Straight Hearth Furnace | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    More Documents & Publications Nitrogen Control in Electric Arc Furnace Steelmaking by Direct Reduced Iron Fines Injection Optimizing Blast Furnace Operation to Increase Efficiency ...

  6. Reduce Air Infiltration in Furnaces; Industrial Technologies...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    they rise, creating a differential pressure between the top and the bottom of the furnace. ... can be calculated by using the equations and graphs given in Industrial Furnaces ...

  7. Seeking Information on Advanced HVAC&R Technologies

    Broader source: Energy.gov [DOE]

    The Building Technologies Office (BTO) released a request for information to seek feedback from the public on the technical metrics and goals, and organizational structure for a proposed advanced heating, ventilation, air conditioning, and refrigeration (HVAC&R) research and development (R&D) effort.

  8. HVAC component data modeling using industry foundation classes

    SciTech Connect (OSTI)

    Bazjanac, Vladimir; Forester, James; Haves, Philip; Sucic, Darko; Xu, Peng

    2002-07-01

    The Industry Foundation Classes (IFC) object data model of buildings is being developed by the International Alliance for Interoperability (IAI). The aim is to support data sharing and exchange in the building and construction industry across the life-cycle of a building. This paper describes a number of aspects of a major extension of the HVAC part of the IFC data model. First is the introduction of a more generic approach for handling HVAC components. This includes type information, which corresponds to catalog data, occurrence information, which defines item-specific attributes such as location and connectivity, and performance history information, which documents the actual performance of the component instance over time. Other IFC model enhancements include an extension of the connectivity model used to specify how components forming a system can be traversed and the introduction of time-based data streams. This paper includes examples of models of particular types of HVAC components, such as boilers and actuators, with all attributes included in the definitions. The paper concludes by describing the on-going process of model testing, implementation and integration into the complete IFC model and how the model can be used by software developers to support interoperability between HVAC-oriented design and analysis tools.

  9. High pressure oxygen furnace

    DOE Patents [OSTI]

    Morris, D.E.

    1992-07-14

    A high temperature high pressure oxygen furnace having a hybrid partially externally heated construction is disclosed. A metallic bar fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized, the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum). The disclosed alloy is fabricated into 11/4 inch bar stock and has a length of about 17 inches. This bar stock is gun drilled for over 16 inches of its length with 0.400 inch aperture to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the bar is provided with a small support aperture into which both a support and a thermocouple can be inserted. The closed end of the gun drilled bar is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior. 5 figs.

  10. High pressure oxygen furnace

    DOE Patents [OSTI]

    Morris, Donald E.

    1992-01-01

    A high temperature high pressure oxygen furnace having a hybrid partially externally heated construction is disclosed. A metallic bar fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized (the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum). The disclosed alloy is fabricated into 11/4 inch bar stock and has a length of about 17 inches. This bar stock is gun drilled for over 16 inches of its length with 0.400 inch aperture to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the bar is provided with a small support aperture into which both a support and a thermocouple can be inserted. The closed end of the gun drilled bar is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior.

  11. High pressure furnace

    DOE Patents [OSTI]

    Morris, D.E.

    1993-09-14

    A high temperature high pressure furnace has a hybrid partially externally heated construction. A metallic vessel fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized (the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum)). The disclosed alloy is fabricated into 11/4 or 2 inch, 32 mm or 50 mm bar stock and has a length of about 22 inches, 56 cm. This bar stock has an aperture formed therein to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the vessel is provided with a small blind aperture into which a thermocouple can be inserted. The closed end of the vessel is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior. 19 figures.

  12. High pressure furnace

    DOE Patents [OSTI]

    Morris, Donald E.

    1993-01-01

    A high temperature high pressure furnace has a hybrid partially externally heated construction. A metallic vessel fabricated from an alloy having a composition of at least 45% nickel, 15% chrome, and 10% tungsten is utilized (the preferred alloy including 55% nickel, 22% chrome, 14% tungsten, 2% molybdenum, 3% iron (maximum) and 5% cobalt (maximum). The disclosed alloy is fabricated into 11/4 or 2 inch, 32 mm or 50 mm bar stock and has a length of about 22 inches, 56 cm. This bar stock has an aperture formed therein to define a closed high temperature, high pressure oxygen chamber. The opposite and closed end of the vessel is provided with a small blind aperture into which a thermocouple can be inserted. The closed end of the vessel is inserted into an oven, preferably heated by standard nickel chrome electrical elements and having a heavily insulated exterior.

  13. Glass Furnace Combustion and Melting Research Facility.

    SciTech Connect (OSTI)

    Connors, John J.; McConnell, John F.; Henry, Vincent I.; MacDonald, Blake A.; Gallagher, Robert J.; Field, William B.; Walsh, Peter M.; Simmons, Michael C.; Adams, Michael E.; Leadbetter, James M.; Tomasewski, Jack W.; Operacz, Walter J.; Houf, William G.; Davis, James W.; Marvin, Bart G.; Gunner, Bruce E.; Farrell, Rick G.; Bivins, David P.; Curtis, Warren; Harris, James E.

    2004-08-01

    solution of proprietary glass production problems. As a consequence of the substantial increase in scale and scope of the initial furnace concept in response to industry recommendations, constraints on funding of industrial programs by DOE, and reorientation of the Department's priorities, the OIT Glass Program is unable to provide the support for construction of such a facility. However, it is the present investigators' hope that a group of industry partners will emerge to carry the project forward, taking advantage of the detailed furnace design presented in this report. The engineering, including complete construction drawings, bill of materials, and equipment specifications, is complete. The project is ready to begin construction as soon as the quotations are updated. The design of the research melter closely follows the most advanced industrial practice, firing by natural gas with oxygen. The melting area is 13 ft x 6 ft, with a glass depth of 3 ft and an average height in the combustion space of 3 ft. The maximum pull rate is 25 tons/day, ranging from 100% batch to 100% cullet, continuously fed, with variable batch composition, particle size distribution, and raft configuration. The tank is equipped with bubblers to control glass circulation. The furnace can be fired in three modes: (1) using a single large burner mounted on the front wall, (2) by six burners in a staggered/opposed arrangement, three in each breast wall, and (3) by down-fired burners mounted in the crown in any combination with the front wall or breast-wall-mounted burners. Horizontal slots are provided between the tank blocks and tuck stones and between the breast wall and skewback blocks, running the entire length of the furnace on both sides, to permit access to the combustion space and the surface of the glass for optical measurements and sampling probes. Vertical slots in the breast walls provide additional access for measurements and sampling. The furnace and tank are to be fully instrumented

  14. AGA/APGA Questions re Furnace NOPR, EERE-2014-BT-STD-0031 | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Furnace NOPR, EERE-2014-BT-STD-0031 AGA/APGA Questions re Furnace NOPR, EERE-2014-BT-STD-0031 AGA-APGA Questions_Ex Parte_Email (68.75 KB) AGA_APGA_Shipments_Questions_2015-04-23 (26.5 KB) More Documents & Publications AGA/APGA Questions re Pre-publication Furnace NOPR August 20, 2014 meeting with DOE representatives regarding the remand of the DOE Direct Final Rule as it relates to efficiency standards for non-weatherized gas furnaces 2015-12-30 Energy Conservation Program:

  15. Role of hydrogen in blast furnaces to improve productivity and decrease coke consumption

    SciTech Connect (OSTI)

    Agarwal, J.C.; Brown, F.C.; Chin, D.L.; Stevens, G.; Clark, R.; Smith, D.

    1995-12-01

    The hydrogen contained in blast furnace gases exerts a variety of physical, thermochemical, and kinetic effects as the gases pass through the various zones. The hydrogen is derived from two sources: (1) the dissociation of moisture in the blast air (ambient and injected with hot blast), and (2) the release from partial combustion of supplemental fuels (including moisture in atomizing water, steam, or transport air, if any). With each atom of oxygen (or carbon), the molar amounts of hydrogen released are more than six times higher for natural gas than for coal, and two times higher for natural gas than for oil. Injection of natural gas in a blast furnace is not a new process. Small amounts of natural gas--about 50--80 lb or 1,100--1,700 SCF/ton of hot metal--have been injected in many of the North American blast furnaces since the early 1960s, with excellent operating results. What is new, however, is a batter understanding of how natural gas reacts in the blast furnace and how natural gas and appropriate quantities of oxygen can be used to increase the driving rate or combustion rate of carbon (coke) in the blast furnace without causing hanging furnace and operating problems. The paper discusses the factors limiting blast furnace productivity and how H{sub 2} and O{sub 2} can increase productivity.

  16. Improving Process Heating System Performance: A Sourcebook for...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... Dryers, Evaporators, Fans, Heat Exchangers, HVAC Systems, Pumps Author: Bela G. Liptak ... Modeling of Gas-Fired Furnaces and Boilers and Other Industrial Heating ...

  17. Building America Expert Meeting: Achieving the Best Installed...

    Energy Savers [EERE]

    the best installed efficiency for residential gas furnaces, explain how AFUE and ... America Best Practices Series Vol. 14: Energy Renovations - HVAC: A Guide for ...

  18. Evaluation of Retrofit Variable-Speed Furnace Fan Motors

    SciTech Connect (OSTI)

    Aldrich, R.; Williamson, J.

    2014-01-01

    In conjunction with the New York State Energy Research and Development Authority (NYSERDA) and Proctor Engineering Group, Ltd. (PEG), the Consortium for Advanced Residential Buildings (CARB) has evaluated the Concept 3 (tm) replacement motors for residential furnaces. These brushless, permanent magnet (BPM) motors can use much less electricity than their PSC (permanent split capacitor) predecessors. This evaluation focuses on existing homes in the heating-dominated climate of upstate New York with the goals of characterizing field performance and cost-effectiveness. The results of this study are intended to be useful to home performance contractors, HVAC contractors, and home efficiency program stakeholders. The project includes eight homes in and near Syracuse, NY. Tests and monitoring was performed both before and after fan motors were replaced. Average fan power reductions were approximately 126 Watts during heating and 220 Watts during cooling operation. Over the course of entire heating and cooling seasons, these translated into average electric energy savings of 163 kWh. Average cost savings were $20 per year. Homes where the fan was used outside of heating and cooling mode saved an additional $42 per year on average. Results indicate that BPM replacement motors will be most cost-effective in HVAC systems with longer run times and relatively low duct static pressures. More dramatic savings are possible if occupants use the fan-only setting when there is no thermal load. There are millions of cold-climate, U.S. homes that meet these criteria, but the savings in most homes tested in this study were modest.

  19. Glass Furnace Model Version 2

    Energy Science and Technology Software Center (OSTI)

    2003-05-06

    GFM2.0 is a derivative of the GFM code with substantially altered and enhanced capabilities. Like its predecessor, it is a fully three-dimensional, furnace simulation model that provides a more accurate representation of the entire furnace, and specifically, the glass melting process, by coupling the combustion space directly to the glass batch and glass melt via rigorous radiation heat transport models for both the combustion space and the glass melt. No assumptions are made with regardmore » to interfacial parameters of heat, flux, temperature distribution, and batch coverage as must be done using other applicable codes available. These critical parameters are calculated. GFM2.0 contains a processor structured to facilitate use of the code, including the entry of teh furnace geometry and operating conditions, the execution of the program, and display of the computational results. Furnace simulations can therefore be created in a straightforward manner.« less

  20. Rebuilding of Rautaruukki blast furnaces

    SciTech Connect (OSTI)

    Kallo, S.; Pisilae, E.; Ojala, K.

    1997-12-31

    Rautaruukki Oy Raahe Steel rebuilt its blast furnaces in 1995 (BF1) and 1996 (BF2) after 10 year campaigns and production of 9,747 THM/m{sup 3} (303 NTHM/ft{sup 3}) and 9,535 THM/m{sup 3} (297 NTHM/ft{sup 3}), respectively. At the end of the campaigns, damaged cooling system and shell cracks were increasingly disturbing the availability of furnaces. The goal for rebuilding was to improve the cooling systems and refractory quality in order to attain a 15 year campaign. The furnaces were slightly enlarged to meet the future production demand. The blast furnace control rooms and operations were centralized and the automation and instrumentation level was considerably improved in order to improve the operation efficiency and to reduce manpower requirements. Investments in direct slag granulation and improved casthouse dedusting improved environmental protection. The paper describes the rebuilding.

  1. Computational fluid dynamics simulations of a glass melting furnace

    SciTech Connect (OSTI)

    Egelja, A.; Lottes, S. A.

    2000-05-09

    The glass production industry is one of the major users of natural gas in the US, and approximately 75% of the energy produced from natural gas is used in the melting process. Industrial scale glass melting furnaces are large devices, typically 5 or more meters wide, and twice as long. To achieve efficient heat transfer to the glass melt below, the natural gas flame must extend over a large portion of the glass melt. Therefore modern high efficiency burners are not used in these furnaces. The natural gas is injected as a jet, and a jet flame forms in the flow of air entering the furnace. In most current glass furnaces the energy required to melt the batch feed stock is about twice the theoretical requirement. An improved understanding of the heat transfer and two phase flow processes in the glass melt and solid batch mix offers a substantial opportunity for energy savings and consequent emission reductions. The batch coverage form and the heat flux distribution have a strong influence on the glass flow pattern. This flow pattern determines to a significant extent the melting rate and the quality of glass.

  2. Fossil fuel furnace reactor

    DOE Patents [OSTI]

    Parkinson, William J.

    1987-01-01

    A fossil fuel furnace reactor is provided for simulating a continuous processing plant with a batch reactor. An internal reaction vessel contains a batch of shale oil, with the vessel having a relatively thin wall thickness for a heat transfer rate effective to simulate a process temperature history in the selected continuous processing plant. A heater jacket is disposed about the reactor vessel and defines a number of independent controllable temperature zones axially spaced along the reaction vessel. Each temperature zone can be energized to simulate a time-temperature history of process material through the continuous plant. A pressure vessel contains both the heater jacket and the reaction vessel at an operating pressure functionally selected to simulate the continuous processing plant. The process yield from the oil shale may be used as feedback information to software simulating operation of the continuous plant to provide operating parameters, i.e., temperature profiles, ambient atmosphere, operating pressure, material feed rates, etc., for simulation in the batch reactor.

  3. Variable frequency microwave furnace system

    DOE Patents [OSTI]

    Bible, D.W.; Lauf, R.J.

    1994-06-14

    A variable frequency microwave furnace system designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity for testing or other selected applications. The variable frequency microwave furnace system includes a microwave signal generator or microwave voltage-controlled oscillator for generating a low-power microwave signal for input to the microwave furnace. A first amplifier may be provided to amplify the magnitude of the signal output from the microwave signal generator or the microwave voltage-controlled oscillator. A second amplifier is provided for processing the signal output by the first amplifier. The second amplifier outputs the microwave signal input to the furnace cavity. In the preferred embodiment, the second amplifier is a traveling-wave tube (TWT). A power supply is provided for operation of the second amplifier. A directional coupler is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter is provided for measuring the power delivered to the microwave furnace. A second power meter detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load. 5 figs.

  4. Variable frequency microwave furnace system

    DOE Patents [OSTI]

    Bible, Don W.; Lauf, Robert J.

    1994-01-01

    A variable frequency microwave furnace system (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34) for testing or other selected applications. The variable frequency microwave furnace system (10) includes a microwave signal generator (12) or microwave voltage-controlled oscillator (14) for generating a low-power microwave signal for input to the microwave furnace. A first amplifier (18) may be provided to amplify the magnitude of the signal output from the microwave signal generator (12) or the microwave voltage-controlled oscillator (14). A second amplifier (20) is provided for processing the signal output by the first amplifier (18). The second amplifier (20) outputs the microwave signal input to the furnace cavity (34). In the preferred embodiment, the second amplifier (20) is a traveling-wave tube (TWT). A power supply (22) is provided for operation of the second amplifier (20). A directional coupler (24) is provided for detecting the direction of a signal and further directing the signal depending on the detected direction. A first power meter (30) is provided for measuring the power delivered to the microwave furnace (32). A second power meter (26) detects the magnitude of reflected power. Reflected power is dissipated in the reflected power load (28).

  5. Improvement of tap holes at Wakayama No. 5 blast furnace

    SciTech Connect (OSTI)

    Yamashita, M.; Kashiwada, M.; Shibuta, H.

    1995-12-01

    The service life of blast furnaces, as the result of various improvement measures, has been extended from the conventional 5 to 7 years to 15 to 20 years. Wakayama No. 5 blast furnace adopted SiC bricks. Though SiC brick excelled in strength and durability, it has raised problems such as tap hole inside temperature lowering attributable to its high thermal conductivity, insufficient mud burning and gas blow-out. Nevertheless, various countermeasures described within have been taken against such problems, and as the result it has now become possible to maintain tap holes in stable conditions.

  6. Unified HVAC and Refrigeration Control Systems for Small Footprint Supermarkets

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Unified HVAC and Refrigeration Control Systems for Small Footprint Supermarkets Teja Kuruganti, David Fugate, James Nutaro, Jibonananda Sanyal, Brian Fricke Oak Ridge National Laboratory John Wallace Emerson Climate Technologies Presented at: Technical Meeting on Software Framework for Transactive Energy: VOLTTRON 23 rd - 24 th July, 2015 2 Presentation_name Motivation and Objective * Supermarket Energy Consumption - 37,000 supermarkets in the US * 2,000,000 kWh per year per store * 1,000,000

  7. Research and Development Roadmap for Emerging HVAC Technologies

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Research & Development Roadmap for Emerging HVAC Technologies W. Goetzler, M. Guernsey, and J. Young October 2014 Prepared by Navigant Consulting, Inc. (This page intentionally left blank) NOTICE This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied,

  8. Integrated high efficiency blower apparatus for HVAC systems

    DOE Patents [OSTI]

    Liu, Xiaoyue; Weigman, Herman; Wang, Shixiao

    2007-07-24

    An integrated centrifugal blower wheel for a heating, ventilation and air conditioning (HVAC) blower unit includes a first blade support, a second blade support, and a plurality of S-shaped blades disposed between the first and second blade supports, wherein each of the S-shaped blades has a trailing edge bent in a forward direction with respect to a defined direction of rotation of the wheel.

  9. research, Development, and Field Testing of Thermochemical Recuperation for High Temperature Furnace

    Office of Environmental Management (EM)

    Project Objective b h b l h h l * Substantiate technical f l feasibility of f Thermochemical Recuperation (TCR) concept and economic viability including identification of technical scale up and including identification of technical scale up and manufacturability concerns * Increase furnace thermal efficiency to 61% Increase furnace thermal efficiency to 61% * Reduce Natural Gas usage ~ 21% * Reduce Carbon footprint ~ 21% * Reduce NO X > 21% (due to flue gas recirculation) 2 Technical

  10. Hot metal Si control at Kwangyang blast furnaces

    SciTech Connect (OSTI)

    Hur, N.S.; Cho, B.R.; Kim, G.Y.; Choi, J.S.; Kim, B.H.

    1995-12-01

    Studies of Si transfer in blast furnaces have shown that the Si level in pig iron is influenced more by the reaction of silicon oxide gas generation in the raceway than the chemical reaction between hot metal and slag at the drop zone. Specifications require a Si content of pig iron below 0.15% at the Kwangyang Works, but the use of soft coking coal in the blend for coke ovens, high pulverized coal injection rate into the blast furnace, and the application of lower grade iron ore has resulted in the need to develop methods to control Si in hot metal. In this paper, the results of in furnace Si control and the desiliconization skills at the casthouse floor are described.

  11. Radiant heating and cooling, displacement ventilation with heat recovery and storm water cooling: An environmentally responsible HVAC system

    SciTech Connect (OSTI)

    Carpenter, S.C.; Kokko, J.P.

    1998-12-31

    This paper describes the design, operation, and performance of an HVAC system installed as part of a project to demonstrate energy efficiency and environmental responsibility in commercial buildings. The systems installed in the 2180 m{sup 2} office building provide superior air quality and thermal comfort while requiring only half the electrical energy of conventional systems primarily because of the hydronic heating and cooling system. Gas use for the building is higher than expected because of longer operating hours and poor performance of the boiler/absorption chiller.

  12. CBEI: HVAC Packages for Small and Medium Sized Commercial Buildings - 2015

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Peer Review | Department of Energy HVAC Packages for Small and Medium Sized Commercial Buildings - 2015 Peer Review CBEI: HVAC Packages for Small and Medium Sized Commercial Buildings - 2015 Peer Review Presenter: Russell Taylor, United Technologies Research Center View the Presentation CBEI: HVAC Packages for Small and Medium Sized Commercial Buildings - 2015 Peer Review (996.29 KB) More Documents & Publications CBEI: FDD for Advanced RTUs - 2015 Peer Review CBEI: Lessons Learned from

  13. ETs HVAC, WH and Appliance R&D

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ET's HVAC, WH and Appliance R&D Antonio M. Bouza, DOE/BTO Technology Manager April 14-15 2015 2 Introduction Program Goals: Support BTO's goals to achieve 50 percent building energy savings * By 2020, develop technologies enabling 10 percent energy savings in HVAC; 20 percent energy savings in water heating, and 15 percent energy savings in appliances * By 2030, develop technologies enabling 25 percent energy savings in HVAC; 35 percent energy savings in water heating, and 30 percent energy

  14. Pre-Commercial Demonstration of Cost-Effective Advanced HVAC Controls -

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2014 BTO Peer Review | Department of Energy Pre-Commercial Demonstration of Cost-Effective Advanced HVAC Controls - 2014 BTO Peer Review Pre-Commercial Demonstration of Cost-Effective Advanced HVAC Controls - 2014 BTO Peer Review Presenter: Hayden Reeve, United Technologies Research Center Optimal control coordination of heating, ventilation, and air conditioning (HVAC) equipment can reduce energy by more than 20% over current building automation systems (BASs) but is not widely deployed due

  15. 2014-04-28 Issuance: Certification of Commercial HVAC, Water Heating, and

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Refrigeration Equipment; Final Rule | Department of Energy 28 Issuance: Certification of Commercial HVAC, Water Heating, and Refrigeration Equipment; Final Rule 2014-04-28 Issuance: Certification of Commercial HVAC, Water Heating, and Refrigeration Equipment; Final Rule This document is a pre-publication Federal Register final rule regarding the certification of commercial heating, ventilation, and air-conditioning (HVAC), water heating (WH), and refrigeration (CRE) equipment, as issued by

  16. DOE Zero Energy Ready Home Low Load High Efficiency HVAC Webinar (Text Version)

    Broader source: Energy.gov [DOE]

    Below is the text version of the DOE Zero Energy Ready Home webinar, Low Load High Efficiency HVAC, presented in May 2014.

  17. R&D Opportunity Assessment: Joining Technologies in HVAC&R -...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    HVAC&R More Documents & Publications Research & Development Roadmap: Next-Generation Low Global Warming Potential Refrigerants Advanced Rotating Heat Exchangers Working Fluids Low...

  18. Development of a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications

    Office of Energy Efficiency and Renewable Energy (EERE)

    Identify a technical and business approach to accelerate the deployment of light-duty automotive TE HVAC technology, maintain occupant comfort, and improve energy efficiency.

  19. ZERH Webinar: Low Load HVAC and Zero Energy Ready Homes | Department...

    Office of Environmental Management (EM)

    long-term structure durability. In this webinar you will learn key HVAC design techniques and critical pitfalls to avoid when building highly energy efficient homes....

  20. Issue #3: HVAC Proper Installation Energy Savings: Over-Promising or

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Under-Delivering? | Department of Energy 3: HVAC Proper Installation Energy Savings: Over-Promising or Under-Delivering? Issue #3: HVAC Proper Installation Energy Savings: Over-Promising or Under-Delivering? What energy savings are realistically achievable by following quality installation standards for installation, operation, and maintenance of residential HVAC? issue3_airflow_charge.pdf (804.56 KB) issue3_hvac_installed.pdf (89.79 KB) issue3_pdi_hvacsys.pdf (325.73 KB) More Documents

  1. Building America Whole-House Solutions for New Homes: HVAC Design Strategy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    for a Hot-Humid Production Builder | Department of Energy HVAC Design Strategy for a Hot-Humid Production Builder Building America Whole-House Solutions for New Homes: HVAC Design Strategy for a Hot-Humid Production Builder In this project, BSC worked with the builder to develop a cost-effective design for moving the HVAC system into conditioned space and increase the energy performance of future production houses in anticipation of 2015 IECC codes. HVAC Design Strategy for a Hot-Humid

  2. Fight Fall Allergies and Save Energy by Checking Your HVAC System

    Broader source: Energy.gov [DOE]

    Fall is a great time to do regular maintenance on your HVAC systems to ensure they're running efficiently -- and it may help your allergies as well!

  3. Furnaces and Boilers | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Home Heating Systems » Furnaces and Boilers Furnaces and Boilers Upgrading to a high efficiency furnace or boiler is an effective way to save money on home heating. Upgrading to a high efficiency furnace or boiler is an effective way to save money on home heating. Most U.S. homes are heated with either furnaces or boilers. Furnaces heat air and distribute the heated air through the house using ducts. Boilers heat water, and provide either hot water or steam for heating. Steam is distributed via

  4. Application of Argonne's Glass Furnace Model to longhorn glass corporation oxy-fuel furnace for the production of amber glass.

    SciTech Connect (OSTI)

    Golchert, B.; Shell, J.; Jones, S.; Energy Systems; Shell Glass Consulting; Anheuser-Busch Packaging Group

    2006-09-06

    The objective of this project is to apply the Argonne National Laboratory's Glass Furnace Model (GFM) to the Longhorn oxy-fuel furnace to improve energy efficiency and to investigate the transport of gases released from the batch/melt into the exhaust. The model will make preliminary estimates of the local concentrations of water, carbon dioxide, elemental oxygen, and other subspecies in the entire combustion space as well as the concentration of these species in the furnace exhaust gas. This information, along with the computed temperature distribution in the combustion space may give indications on possible locations of crown corrosion. An investigation into the optimization of the furnace will be performed by varying several key parameters such as the burner firing pattern, exhaust number/size, and the boost usage (amount and distribution). Results from these parametric studies will be analyzed to determine more efficient methods of operating the furnace that reduce crown corrosion. Finally, computed results from the GFM will be qualitatively correlated to measured values, thus augmenting the validation of the GFM.

  5. Geneva Steel blast furnace improvements

    SciTech Connect (OSTI)

    Fowles, R.D.; Hills, L.S.

    1993-01-01

    Geneva Steel is located in Utah and is situated near the western edge of the Rocky Mountains adjacent to the Wasatch Front. Geneva's No. 1, 2 and 3 are the only remaining operating blast furnaces in the United States west of the Mississippi River. They were originally constructed in 1943 to support steelmaking during World War II. During the early 60's all three furnaces were enlarged to their current working volume. Very few major improvements were made until recently. This discussion includes a brief historical perspective of operating difficulties associated with practice, design and equipment deficiencies. Also included is an overview of blast furnace improvements at Geneva found necessary to meet the demands of modern steelmaking. Particular emphasis will be placed on casthouse improvements.

  6. Intermountain Gas Company (IGC)- Gas Heating Rebate Program

    Broader source: Energy.gov [DOE]

    The Intermountain Gas Company's (IGC) Gas Heating Rebate Program offers customers a $200 per unit rebate when they convert to a high efficiency natural gas furnace that replaces a heating system...

  7. Furnace and Boiler Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2:50pm Addthis Furnaces heat air and distribute the heated air through a building using ducts; boilers heat water, providing either hot water or steam for heating. Furnaces...

  8. Furnace Litigation Settled | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Furnace Litigation Settled Furnace Litigation Settled May 2, 2014 - 11:07am Addthis On June 27, 2011, the U.S. Department of Energy (DOE) published in the Federal Register a direct ...

  9. Evaluation of Retrofit Variable-Speed Furnace Fan Motors

    SciTech Connect (OSTI)

    Aldrich, R.; Williamson, J.

    2014-01-01

    In conjunction with the New York State Energy Research and Development Authority (NYSERDA) and Proctor Engineering Group, Ltd. (PEG), the Consortium for Advanced Residential Buildings (CARB) has evaluated the Concept 3™ replacement motors for residential furnaces. These brushless, permanent magnet (BPM) motors can use much less electricity than their PSC (permanent split capacitor) predecessors. This evaluation focuses on existing homes in the heating-dominated climate of upstate New York with the goals of characterizing field performance and cost effectiveness. The project includes eight homes in and near Syracuse, NY. Tests and monitoring was performed both before and after fan motors were replaced. Results indicate that BPM replacement motors will be most cost effective in HVAC systems with longer run times and relatively low duct static pressures. More dramatic savings are possible if occupants use the fan-only setting when there is no thermal load. There are millions of cold-climate, U.S. homes that meet these criteria, but the savings in most homes tested in this study were modest.

  10. Building America … ORNL R&D: HVAC Research

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Building America - ORNL R&D: HVAC Research 2015 Building Technologies Office Peer Review Jeffrey Munk, munkjd@ornl.gov Oak Ridge National Laboratory Philip Boudreaux, Roderick Jackson, Wale Odukomaiya Project Summary Timeline: Start date: 10/1/2013 Planned end date: 9/30/2014 Key Milestones 1. Heating Performance Curves; 4/15/2014 2. Cooling Performance Curves; 7/15/2014 3. Final Report w/Sizing Guidelines; 2/28/2015 Budget: Total DOE $ to date: $200k Total future DOE $: $ 0 Target

  11. Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle

    Broader source: Energy.gov (indexed) [DOE]

    Applications | Department of Energy 2 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting ace047_maranville_2012_o.pdf (1.03 MB) More Documents & Publications Thermoelectric HVAC for Light-Duty Vehicle Applications Improving efficiency of a vehicle HVAC system with comfort modeling, zonal design, and thermoelectric devices

  12. New England Gas Company- Residential and Commercial Energy Efficiency Rebate Programs

    Broader source: Energy.gov [DOE]

    In conjunction with Gas Networks, New England Gas Company offers its residential and commercial customers rebates for buying energy efficient gas boilers, furnaces, high efficiency water heaters,...

  13. Fouling of HVAC fin and tube heat exchangers

    SciTech Connect (OSTI)

    Siegel, Jeffrey; Carey, Van P.

    2001-07-01

    Fin and tube heat exchangers are used widely in residential, commercial and industrial HVAC applications. Invariably, indoor and outdoor air contaminants foul these heat exchangers. This fouling can cause decreased capacity and efficiency of the HVAC equipment as well as indoor air quality problems related to microbiological growth. This paper describes laboratory studies to investigate the mechanisms that cause fouling. The laboratory experiments involve subjecting a 4.7 fins/cm (12 fins/inch) fin and tube heat exchanger to an air stream that contains monodisperse particles. Air velocities ranging from 1.5-5.2 m/s (295 ft/min-1024 ft/min) and particle sizes from 1--8.6 {micro}m are used. The measured fraction of particles that deposit as well as information about the location of the deposited material indicate that particles greater than about 1 {micro}m contribute to fouling. These experimental results are used to validate a scaling analysis that describes the relative importance of several deposition mechanisms including impaction, Brownian diffusion, turbophoresis, thermophoresis, diffusiophoresis, and gravitational settling. The analysis is extended to apply to different fin spacings and particle sizes typical of those found in indoor air.

  14. Simplified simulation of the transient behavior of temperatures in the upper shaft of the blast furnace

    SciTech Connect (OSTI)

    Saxen, H.

    1998-06-01

    The blast furnace is the principal process in the world for production of iron for primary steelmaking. The furnace acts as a huge countercurrent heat exchange and chemical reactor with complicated heat and mass transfer phenomena and chemical reactions. The flows of burden and gas in the blast furnace shaft strongly affect the fuel economy of the process. An optimal gas flow distribution, which is obtained by controlling the burden distribution, leads to a high utilization degree of the reducing gas, smooth burden descent, and little wear of the furnace lining. Here, a one-dimensional dynamic model of the upper part of the blast furnace shaft is applied to study the evolution of gas and burden temperatures, mainly in order to shed light on the transient phenomena after charging dumps of burden. The effects of irregularities in the burden descent and charging are also studied briefly. The simulations demonstrate that the temperatures of the burden layers in the lower part of the simulated region assume a quasi-steady state, indicating that the changes in the top gas temperature experienced immediately after a dump of burden arise primarily because of heat transfer between the gas and the dump. These results support the idea that such temporary changes can be interpreted in terms of distribution of the dumps on the burden surface.

  15. Buildings Energy Data Book: 7.4 Efficiency Standards for Commercial HVAC

    Buildings Energy Data Book [EERE]

    1 Efficiency Standards for Commercial Warm Air Furnaces Effective for products manufactured on or after January 1, 1994 Thermal Efficiency (1) Gas-fired, with capacity ≥ 225,000 Btu/hr Not less than 80% Oil-fired, with capacity ≥ 225,000 Btu/hr Not less than 81% Note(s): Source(s): 1) Measured at the maximum rated capacity. Title 10, Code of Federal Regulations, Part 431 - Energy Efficiency Program for Certain Commercial and Industrial Equipment, Subpart D - Commercial Warm Air Furna

  16. Technology Solutions Case Study: Replacement of Variable-Speed Motors for Furnaces

    SciTech Connect (OSTI)

    2013-02-01

    In conjunction with the New York State Energy Research and Development Authority (NYSERDA) and Proctor Engineering Group, Ltd. (PEG), the Consortium for Advanced Residential Buildings (CARB) evaluated the Concept 3 replacement motors for residential furnaces in eight homes in Syracuse, NY. These brushless, permanent magnet (BPM) motors can use much less electricity than their PSC (permanent split capacitor) predecessors. This evaluation focuses on existing homes in the heating-dominated climate of upstate New York with the goals of characterizing field performance and cost-effectiveness. The results of this study are intended to be useful to home performance contractors, HVAC contractors, and home efficiency program stakeholders. Tests and monitoring was performed both before and after fan motors were replaced. Average fan power reductions were approximately 126 Watts during heating and 220 Watts during cooling operation. Over the course of entire heating and cooling seasons, these translated into average electric energy savings of 163 kWh, with average cost savings of $20 per year. Homes where the fan was used outside of heating and cooling mode saved an additional $42 per year on average. Results indicate that BPM replacement motors will be most cost-effective in HVAC systems with longer run times and relatively low duct static pressures. More dramatic savings are possible if occupants use the fan-only setting when there is no thermal load.

  17. An Optical Sensor for Post-Combustion Control in Electric Arc Furnace Steelmaking

    SciTech Connect (OSTI)

    2005-09-01

    Real-time measurement of off-gas composition could enable dynamic control of electric arc furnaces (EAFs), optimizing steelmaking electrical energy input and reducing carbon monoxide (CO) emissions. However, offgas measurement is very difficult due to the extremely dusty, hot, and gas-laden steelmaking environment.

  18. HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Heater and Appliance R&D - 2014 BTO Peer Review HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy This presentation at the 2014 Peer Review provided an overview of the Building Technologies Office's HVAC, Water Heater and Appliance R&D activities. Through robust feedback, the BTO Program Peer Review enhances existing efforts and improves future designs. View the Presentation HVAC, Water Heater and Appliance R&D

  19. Workshop 1: Advanced HVAC&R Research Effort | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    1: Advanced HVAC&R Research Effort Workshop 1: Advanced HVAC&R Research Effort The Building Technologies Office (BTO) is exploring the launch of a major HVAC&R research effort in the area of low global warming potential and non-vapor compression technologies. To support this endeavor, BTO is convening two workshops to exchange ideas on the technical focus and overall structure and approach for the effort. The first workshop was held on November 17, 2015 in conjunction with American

  20. Workshop 2: Advanced HVAC&R Research Effort | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    2: Advanced HVAC&R Research Effort Workshop 2: Advanced HVAC&R Research Effort The Building Technologies Office (BTO) is exploring the launch of a major HVAC&R research effort in the area of low global warming potential and non-vapor compression technologies. To support this endeavor, BTO convened two workshops to exchange ideas on the technical focus and overall structure and approach for the effort. The second workshop was held at the American Society of Heating, Refrigerating, and

  1. ZERH Webinar: Low Load HVAC in Zero Energy Ready Homes | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Low Load HVAC in Zero Energy Ready Homes ZERH Webinar: Low Load HVAC in Zero Energy Ready Homes Building low-load homes creates a new set of challenges for HVAC designers and installers. Right-sizing equipment, managing ventilation, and controlling interior moisture levels are critical if you wish to: (1) deliver the energy efficiency benefits of a tight, well-insulated envelope, (2) maintain homeowner comfort and (3) ensure long-term structure durability. In this webinar you will

  2. Building America Expert Meeting Report: Transitioning Traditional HVAC Contractors to Whole House Performance Contractors

    SciTech Connect (OSTI)

    Burdick, A.

    2011-10-01

    This report outlines findings resulting from a U.S. Department of Energy Building America expert meeting to determine how HVAC companies can transition from a traditional contractor status to a service provider for whole house energy upgrade contracting. IBACOS has embarked upon a research effort under the Building America Program to understand business impacts and change management strategies for HVAC companies. HVAC companies can implement these strategies in order to quickly transition from a 'traditional' heating and cooling contractor to a service provider for whole house energy upgrade contracting. Due to HVAC service contracts, which allow repeat interaction with homeowners, HVAC companies are ideally positioned in the marketplace to resolve homeowner comfort issues through whole house energy upgrades. There are essentially two primary ways to define the routes of transition for an HVAC contractor taking on whole house performance contracting: (1) Sub-contracting out the shell repair/upgrade work; and (2) Integrating the shell repair/upgrade work into their existing business. IBACOS held an Expert Meeting on the topic of Transitioning Traditional HVAC Contractors to Whole House Performance Contractors on March 29, 2011 in San Francisco, CA. The major objectives of the meeting were to: Review and validate the general business models for traditional HVAC companies and whole house energy upgrade companies Review preliminary findings on the differences between the structure of traditional HVAC Companies and whole house energy upgrade companies Seek industry input on how to structure information so it is relevant and useful for traditional HVAC contractors who are transitioning to becoming whole house energy upgrade contractors Seven industry experts identified by IBACOS participated in the session along with one representative from the National Renewable Energy Laboratory (NREL). The objective of the meeting was to validate the general operational profile of an

  3. Issue #7: What are the Best HVAC Solutions for Low-Load, High Performance

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Homes? | Department of Energy 7: What are the Best HVAC Solutions for Low-Load, High Performance Homes? Issue #7: What are the Best HVAC Solutions for Low-Load, High Performance Homes? What components and controls are required to implement the "perfect," cost-effective, production-level low-load space conditioning systems for all major U.S. climate regions? issue7_sensible_loadcontrol.pdf (1.05 MB) issue7.hvac_lowload.pdf (1.02 MB) issue7_combi_systems.pdf (590.15 KB)

  4. DOE ZERH Webinar: Low Load High Efficiency HVAC (Text Version) | Department

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of Energy Low Load High Efficiency HVAC (Text Version) DOE ZERH Webinar: Low Load High Efficiency HVAC (Text Version) Below is the text version of the DOE Zero Energy Ready Home webinar, Low Load High Efficiency HVAC, presented in May 2014. Watch the presentation. GoToWebinar voice: The broadcast is now starting. All attendees are in listen-only mode. Lindsay Parker: Hi, everyone. Welcome to the Department of Energy Zero Energy Ready Home Technical Training Webinar Series. We're really

  5. Post combustion trials at Dofasco`s KOBM furnace

    SciTech Connect (OSTI)

    Farrand, B.L.; Wood, J.E.; Goetz, F.J.

    1992-12-31

    Post combustion trials were conducted at Dofasco`s 300 tonne KOBM furnace as part of the AISI Direct Steelmaking Program. The purpose of the project work was to measure the post combustion ratio (PCR) and heat transfer efficiency (HTE) of the post combustion reaction in a full size steelmaking vessel. A method of calculating PCR and HTE using off gas analysis and gas temperature was developed. The PCR and HTE were determined under normal operating conditions. Trials assessed the effect of lance height, vessel volume, foaming slag and pellet additions on PCR and HTE.

  6. Ferrosilicon smelting in a direct current furnace

    DOE Patents [OSTI]

    Dosaj, V.D.; May, J.B.

    1992-12-29

    The present invention is a process for smelting ferrosilicon alloy. The process comprises adding a carbon source and tailings comprising oxides of silicon and iron to a substantially closed furnace. Heat is supplied to the furnace by striking a direct current arc between a cathode electrode and an anode functional hearth. In a preferred embodiment of the present invention, the cathode electrode is hollow and feed to the substantially closed furnace is through the hollow electrode. 1 figure.

  7. Ferrosilicon smelting in a direct current furnace

    DOE Patents [OSTI]

    Dosaj, Vishu D. (Midland, MI); May, James B. (Midland, MI)

    1992-12-29

    The present invention is a process for smelting ferrosilicon alloy. The process comprises adding a carbon source and tailings comprising oxides of silicon and iron to a substantially closed furnace. Heat is supplied to the furnace by striking a direct current arc between a cathode electrode and an anode functional hearth. In a preferred embodiment of the present invention, the cathode electrode is hollow and feed to the substantially closed furnace is through the hollow electrode.

  8. Optical Furnace offers improved semiconductor device processing

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    capabilities - Energy Innovation Portal Optical Furnace offers improved semiconductor device processing capabilities Award winning solar manufacturing process National Renewable Energy Laboratory Contact NREL About This Technology <p> <em>The highly versatile optical furnace provides semiconductor manufacturers with energy efficient methods to process devices in a high throughput capacity. &nbsp;</em></p> The highly versatile optical furnace provides semiconductor

  9. Crystal growth furnace with trap doors

    DOE Patents [OSTI]

    Sachs, Emanual M.; Mackintosh, Brian H.

    1982-06-15

    An improved furnace is provided for growing crystalline bodies from a melt. The improved furnace is characterized by a door assembly which is remotely controlled and is arranged so as to selectively shut off or permit communication between an access port in the furnace enclosure and a hot zone within that enclosure. The invention is especially adapted to facilitate use of crystal growing cartridges of the type disclosed in U.S. Pat. No. 4,118,197.

  10. Catalyst added to Claus furnace reduces sulfur losses

    SciTech Connect (OSTI)

    Luinstra, E.A.; d'Haene, P.E. (Shell Canada Ltd., Toronto, ON (Canada). Oakville Research Centre)

    1989-07-01

    Several substances effectively catalyze the reduction of carbon disulfide in Claus gas streams at Claus reaction furnace conditions (about 1,000{sup 0}C). Some conversion of carbonyl sulfide also occurs. Carbon disulfide and carbonyl sulfide as well-known problem compounds that reduce sulfur recovery efficiency in many sulfur recovery plants. Installation of a suitable catalytic material in the reaction furnace promises significant improvement of Claus plant efficiency, and prolonged life of the catalytic converters. Almost every Claus sulfur recovery plant makes some carbon disulfide (CS/sub 2/) and carbonyl sulfide (COS) in the reaction furnace, and in many of these plants, these compounds constitute a significant problem. CS/sub 2/ and COS often comprise more than 50% of sulfur losses in the tail gas. This article reexamines the issue of CS/sub 2/ and COS in the Claus plant. The relative importance of these two troublesome components is explored with data accumulated from Shell Canada Claus plants. The authors discuss which factors tend to produce these components. Then a method for reducing CS/sub 2/ and COS virtually at the source will be introduced.