Steady-state and transient tests using the unguarded thin-heater apparatus (thermophysical properties of building materials)

Technical Report · Fri Mar 01 00:00:00 EST 1991

OSTI ID:5809087

McElroy, D L; Graves, R S; Yarbrough, D W ^[1]; Fine, H A ^[2]

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1. Oak Ridge National Lab., TN (USA)
2. Kentucky Univ., Lexington, KY (USA). Dept. of Materials Science and Engineering

The Oak Ridge National Laboratory unguarded thin-heater apparatus (UTHA) was used to determine the thermophysical properties of building materials from 24 to 50{degrees}C (75 to 120{degrees}F). Steady-state and transient modes of operation yielded data on four types of material: (1) gypsum wallboard containing 0, 15, and 30 wt % wax; (2) calcium silicate insulations with densities of 307, 444, and 605 kg/m{sup 3}; (3) three wood products; and (4) two cellular plastic foams. The extruded polystyrene was measured 25, 45, 74, 131, and 227 d after production. In the steady-state mode of operation, the UTHA yields the thermal conductivity specimen. In the UTHA transient mode of operation, a step-change in heat flux was applied to specimens that were initially isothermal or that had a steady, imposed temperature gradient. 39 refs., 22 figs., 29 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5809087
• Report Number(s): ORNL/TM-11629; ON: DE91012992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BUILDING MATERIALS
THERMODYNAMICS
CALCIUM SILICATES
DENSITY
FINITE DIFFERENCE METHOD
GYPSUM
HEATERS
PLASTIC FOAMS
SPECIFIC HEAT
STEADY-STATE CONDITIONS
TEMPERATURE EFFECTS
THERMAL CONDUCTIVITY
THERMAL DIFFUSIVITY
THERMAL INSULATION
TRANSIENTS
WAXES
WOOD
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
COLLOIDS
DISPERSIONS
FOAMS
ITERATIVE METHODS
MATERIALS
MINERALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
SILICATES
SILICON COMPOUNDS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
360603* - Materials- Properties
320107 - Energy Conservation
Consumption
& Utilization- Building Systems- (1987-)