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Variable Speed Integrated Intelligent HVAC Blower

Description: This comprehensive topical report discusses the key findings in the development of an advanced blower for HVAC applications. The benefits of rearward inclined blades over that of traditional forward inclined blades is well documented, and several prototype wheels are demonstrated in various housings. A comparison of retrofitted blowers to that of three typical units from the industry is presented. The design and modification of the blower housing is addressed and the impact of size limitations … more
Date: September 23, 2003
Creator: Wiegman, Herman; Stephens, Charlie; Liu, Xiaoyue; Carl, Ralph; Zhuang, Sunny; Szczesny, Paul et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HB-Line Dissolver Dilution Flows and Dissolution Capability with Dissolver Charge Chute Cover Off

Description: A flow test was performed in Scrap Recovery of HB-Line to document the flow available for hydrogen dilution in the dissolvers when the charge chute covers are removed. Air flow through the dissolver charge chutes, with the covers off, was measured. A conservative estimate of experimental uncertainty was subtracted from the results. After subtraction, the test showed that there is 20 cubic feet per minute (cfm) air flow through the dissolvers during dissolution with a glovebox exhaust fan operat… more
Date: January 15, 2003
Creator: Hallman, D. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MAJOR OIL PLAYS IN UTAH AND VICINITY

Description: Utah oil fields have produced over 1.2 billion barrels (191 million m{sup 3}). However, the 13.7 million barrels (2.2 million m{sup 3}) of production in 2002 was the lowest level in over 40 years and continued the steady decline that began in the mid-1980s. The Utah Geological Survey believes this trend can be reversed by providing play portfolios for the major oil-producing provinces (Paradox Basin, Uinta Basin, and thrust belt) in Utah and adjacent areas in Colorado and Wyoming. Oil plays are… more
Date: September 1, 2003
Creator: Chidsey, Thomas C.; Morgan, Craig D.; McClure, Kevin & Willis, Grant C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of U.S. residential air leakage database

Description: The air leakage of a building envelope can be determined from fan pressurization measurements with a blower door. More than 70,000 air leakage measurements have been compiled into a database. In addition to air leakage, the database includes other important characteristics of the dwellings tested, such as floor area, year built, and location. There are also data for some houses on the presence of heating ducts, and floor/basement construction type. The purpose of this work is to identify house … more
Date: July 1, 2003
Creator: Chan, Wanyu R.; Price, Phillip N.; Sohn, Michael D. & Gadgil, Ashok J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laboratory Evaluation of the Delta Q Test for Duct Leakage

Description: Using a residential-size duct system in a controlled laboratory setting, the repeatability and accuracy of the Delta Q test for air leakage in residential duct systems have been measured. More than 100 Delta Q tests were performed. These were compared with results using fan pressurization and also with results of a procedure (Delta Q Plus) that uses leakage hole-size information to select the leakage pressures to be used in the Delta Q algorithm. The average error in supply or return leakage fo… more
Date: May 1, 2003
Creator: Andrews, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CHARACTERIZATION OF AIRFLOWS NEAR THE EXIT OF HVAC REGISTERS USING LASER DOPPLER VELOCIMETRY (LDV).

Description: A facility to characterize the airflow at the exit of HVAC registers was designed and fabricated. The objective of this work is to obtain velocity and turbulence data at the exit of registers, which can then be used as an input boundary condition in a modern Computational Fluid Dynamics (CFD) code to predict the velocity and temperature distribution in an enclosure, and also the register performance parameters such as throw. During the course of this work, two commonly used registers were teste… more
Date: March 13, 2003
Creator: Tutu, N. K.; Krishna, C. R.; Andrews, J. W. & Butcher, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improving air handler efficiency in residential HVAC applications

Description: In continuing the development of energy efficiency standards, consideration has turned to air handlers used for heating and air conditioning of consumer residences. These air handlers have typical efficiencies of about 10% to 15% due to poor electric motor performance and aerodynamically poor fans and fan housings. This study was undertaken to examine some of these performance issues, under carefully controlled laboratory conditions, to support potential regulatory changes. In addition, this st… more
Date: August 1, 2003
Creator: Walker, Iain S.; Mingee, Michael D. & Brenner, Douglas E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CFD analysis of LLNL downdraft table

Description: This study examines the airflow and contaminant transport in an existing room (89 inch x 77 inch x 98 inch) that houses a downdraft table at LLNL. The facility was designed and built in the 1960's and is currently being considered for redesign. One objective of the redesign is to reduce airflow while maintaining or improving user safety. Because this facility has been used for many years to handle radioactive material it is impractical to conduct extensive experimental tests in it. Therefore, w… more
Date: October 1, 2003
Creator: Finlayson, Elizabeth U.; Jayaraman, Buvana; Kristoffersen, Astrid R. & Gadgil, Ashok J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Indoor Pollutant Mixing Time in an Isothermal Closed Room: An Investigation Using CFD

Description: We report on computational fluid dynamics (CFD) predictions of mixing time of a pollutant in an unventilated, mechanically mixed, isothermal room. The study aims to determine: (1) the adequacy of the standard Reynolds Averaged Navier Stokes two-equation ({kappa}-{var_epsilon}) turbulence model for predicting the mixing time under these conditions and (2) the extent to which the mixing time depends on the room airflow, rather than the source location within the room. The CFD simulations modeled … more
Date: July 1, 2003
Creator: Gadgil, A. J.; Lobscheid, C.; Abadie, M. O. & Finlayson, E. U.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Transport of Radon Gas into a Tunnel at Yucca Mountain-Estimating Large-Scale Fractured Tuff Hydraulic Properties and Implications for the Operation of the Ventilation System

Description: Radon gas concentrations have been monitored as part of the operation of a tunnel (the Exploratory Studies Facility-ESF) at Yucca Mountain to ensure worker safety. The objective of this study was to examine the potential use of the radon data to estimate large-scale formation properties of fractured tuffs. This objective was examined by developing a numerical model, based upon the characteristics of the ESF and the Topopah Spring welded (TSw) tuff unit, capable of predicting radon concentration… more
Date: June 6, 2003
Creator: Unger, A.; Finsterle, S. & Bodvarsson, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Duct leakage impacts on VAV system performance in California large commercial buildings

Description: The purpose of this study is to evaluate the variability of duct leakage impacts on air distribution system performance for typical large commercial buildings in California. Specifically, a hybrid DOE-2/TRNSYS sequential simulation approach was used to model the energy use of a low-pressure terminal-reheat variable-air-volume (VAV) HVAC system with six duct leakage configurations (tight to leaky) in nine prototypical large office buildings (representing three construction eras in three Californ… more
Date: October 1, 2003
Creator: Wray, Craig P. & Matson, Nance E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field Performance of a Slimline Turbomist Evaporator under Southeastern U. S. Climate Conditions

Description: A recent study of evaporation technologies for treating F- and H-area groundwater contaminated with radionuclides and metals (Flach 2002) suggested that spray evaporation might be a viable alternative or supplemental technique for managing tritiated groundwater at the Mixed Waste Management Facility. The particular technology of interest in this study is the Slimline Manufacturing Ltd. Turbo-Mist Evaporator, which uses a powerful blower and high-pressure spray nozzles to propel a fine mist into… more
Date: December 15, 2003
Creator: Sappington, F.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Annual Energy Consumption Analysis Report for Richland Middle School

Description: Richland Middle School is a single story, 90,000 square feet new school located in Richland, WA. The design team proposed four HVAC system options to serve the building. The proposed HVAC systems are listed as following: (1) 4-pipe fan coil units served by electrical chiller and gas-fired boilers, (2) Ground-source closed water loop heat pumps with water loop heat pumps with boiler and cooling tower, and (3) VAV system served by electrical chiller and gas-fired boiler. This analysis estimates t… more
Date: December 18, 2003
Creator: Liu, Bing
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy Recovery for Ventilation Air in Laboratories; Laboratories for the 21st Century: Best Practices

Description: This publication is one of a series of best practices guides for ''Laboratories for the 21st Century,'' a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy Federal Energy Management Program. It is intended for all those who plan, design, and construct public and private-sector laboratory buildings. Laboratory buildings typically consume 5 to 10 times more energy for heating, cooling, and fans than most office buildings, because they need to be ventilate… more
Date: October 1, 2003
Item Type: Refine your search to only Pamphlet
Partner: UNT Libraries Government Documents Department
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