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Thermal performance of concrete masonry unit wall systems

Description: New materials, modern building wall technologies now available in the building marketplace, and unique, more accurate, methods of thermal analysis of wall systems create an opportunity to design and erect buildings where thermal envelopes that use masonry wall systems can be more efficient. Thermal performance of the six masonry wall systems is analyzed. Most existing masonry systems are modifications of technologies presented in this paper. Finite difference two-dimensional and three-dimension… more
Date: December 31, 1995
Creator: Kosny, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of Thermal Diffusity and Flow Resistance for TCAP Materials

Description: SRS uses the Thermal Cycling Absorption Process (TCAP) to separate isotopes of hydrogen. The frequency of thermal cycles is a limit of the productivity of the process and that frequency is largely determined by the thermal diffusivity of the absorbent material. For a given tube diameter, a larger thermal diffusivity decreases the time required for each cycle. In 1998, the Engineering Development Laboratory measured thermal diffusivity and thermal conductivity for three TCAP materials in helium.
Date: November 11, 2004
Creator: Steimke, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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COMPARISON OF THERMAL PROPERTIES OF THERMAL BARRIER COATING DEPOSITED ON IN738 USING STANDARD AIR PLASMA SPRAY WITH 100HE PLASMA SPRAY SYSTEM

Description: A typical blade material is made of Nickel super alloy and can bear temperatures up to 950°C. But the operating temperature of a gas turbine is above the melting point of super alloy nearly at 1500°C. This could lead to hot corrosions, high temperature oxidation, creep, thermal fatigue may takes place on the blade material. Though the turbine has an internal cooling system, the cooling is not adequate to reduce the temperature of the blade substrate. Therefore to protect the blade material as w… more
Date: July 1, 2006
Creator: Uppu, N.; Mensah, P.F. & Ofori, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Estimated Upper Bounds to the Half-Life of Thermal Decomposition of Ammonia, Hydrogen, Methane, and Propane

Description: An estimate was made of the upper bound for the half-time of dissociation at 100 atm for ammonia, methane, and propane at 2500 deg K and hydrogen at 5000 deg K. In each case a unimolecular reactron in the homogeneous gas phase was chosen as most suitable for this purpose. Slater's theory has been used to estimate the necessary frequency factors. The upper bounds to the half- time for dissociation range from 3 x 10⁻⁷ to 6 x 10⁻⁶ sec. Extrapolation of decomposition rate data obtained at --1000 de… more
Date: August 1955
Creator: Herschbach, Dudley R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ultra high temperature ceramics for hypersonic vehicle applications.

Description: HfB{sub 2} and ZrB{sub 2} are of interest for thermal protection materials because of favorable thermal stability, mechanical properties, and oxidation resistance. We have made dense diboride ceramics with 2 to 20 % SiC by hot pressing at 2000 C and 5000 psi. High-resolution transmission electron microscopy (TEM) shows very thin grain boundary phases that suggest liquid phase sintering. Fracture toughness measurements give RT values of 4 to 6 MPam{sup 1/2}. Four-pt flexure strengths measured in… more
Date: January 1, 2006
Creator: Tandon, Rajan; Dumm, Hans Peter; Corral, Erica L.; Loehman, Ronald E. & Kotula, Paul Gabriel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Relative Thermal Conductivities of Liquid Lithium, Sodium, and Eutectic NaK, and the Specific Heat of Liquid Lithium

Description: Report discussing the relative thermal conductivities of liquid lithium, sodium, and eutectic NaK, and the specific heat of liquid lithium, as well as the methods and materials used to determine this information.
Date: April 21, 1950
Creator: Yaggee, F. L. & Untermyer, Samuel, 1912-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Frequency dependent thermal expansion in binary viscoelasticcomposites

Description: The effective thermal expansion coefficient beta* of abinary viscoelastic composite is shown to be frequency dependent even ifthe thermal expansion coefficients beta A and beta B of both constituentsare themselves frequency independent. Exact calculations for binaryviscoelastic systems show that beta* is related to constituent valuesbeta A, beta B, volume fractions, and bulk moduli KA, KB, as well as tothe overall bulk modulus K* of the composite system. Then, beta* isdetermined for isotropic s… more
Date: December 1, 2007
Creator: Berryman, James G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Thermal Conductivity of Uranium Monocarbide

Description: Uranium carbide shows promise as a fuel material for reactors operating at relatively high temperatures based on its high melting point, high uranium density and high thermal conductivity. Before refined reactor designs can be made, however, good quantitative data on the thermal conductivity at temperatures in excess of 1000C is required. This technical report presents data gathered as part of a continuing study aimed at determining the thermal conductivity of refractory uranium fuels as a func… more
Date: April 2, 1964
Creator: Sobon, J. T.; Miller, A. D. & DeCrescente, M. A. (Michael A.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low cycle thermal fatigue testing of beryllium grades for ITER plasma facing components

Description: A novel technique has been used to test the relative low cycle thermal fatigue resistance of different grades of US and Russian beryllium, which is proposed as plasma facing armor for fusion reactor first wall, limiter, and divertor components. The 30 kW electron beam test system at Sandia National Laboratories was used to sweep the beam spot along one direction at 1 Hz. This produces a localized temperature ``spike`` of 750{degree}C for each pass of the beam. Large thermal stresses in excess o… more
Date: February 1, 1996
Creator: Watson, R. D.; Youchison, D. L.; Dombrowski, D. E.; Guiniatouline, R. N. & Kupriynov, I. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Thick Thermal Barrier Coatings (TTBCs) for Low Emission, High Efficiency Diesel Engine Components

Description: The objective of this program was to advance the fundamental understanding of thick thermal barrier coating (TTBC) systems for application to low heat rejection diesel engine combustion chambers. Previous reviews of thermal barrier coating technology concluded that the current level of understanding of coating system behavior is inadequate and the lack of fundamental understanding may impede the application of thermal barrier coating to diesel engines.(1) Areas of TTBC technology examined in th… more
Date: March 2, 2006
Creator: Beardsley, M. Brad; Socie, Darrell; Redja, Ed & Berndt, Christopher
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of Ceramic Refractories for Slagging Gasifiers : Summary of Progress to Date

Description: Commercial refractories were tested for up to 500 h in both basic and acidic slags. The slag compositions typify those expected in slagging coal gasifiers. The slag temperatures ranged up to 1600 degrees C. Compositions tested have included silicon carbides, chrome-alumina-magnesia spinels, and alumina and magnesia-based refractories with various amounts of chromia and silica. In some tests, the cold faces were water cooled. With water cooling, the silicon carbides showed virtually no attack af… more
Date: September 1978
Creator: Kennedy, C. R.; Swaroop, R.; Jones, D. J.; Fousek, R. J.; Poeppel, R. B. & Stahl, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermal Energy Storage

Description: Advanced Research Projects Agency-Energy project sheet summarizing general information about the 15 projects that are a part of the High Energy Advanced Thermal Storage (HEATS) program including project goals, innovation needs, and potential impacts.
Date: May 21, 2012
Creator: United States. Advanced Research Projects Agency-Energy.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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UO2 Pellet Thermal Conductivity From Irradiations With Central Melting

Description: Abstract: Continued irradiation experience under the AEC - Euratom, UO2 High Performance Program provided five separate and distinct sets of data on UO2 thermal conductivity. Four of these results are expressed in terms of the value of the thermal conductivity. The first two of these measurements were applicable -- strictly -- to poly crystalline UO2. Recently, three additional sets of measurements have been obtained -- all pertinent to UO2 after the formation of large columnar grains. The … more
Date: July 1964
Creator: Lyons, M. F.; Coplin, D. H.; Pashos, T. J. & Weidenbaum, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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