Apparatus for total hemispherical emittance measurements of full-scale receiver pipes from 100 to 300°C

Reitter, T.A.; Giedt, W. H.

doi:10.1016/0038-092x(81)90162-6

Cited by 4 publications

(1 citation statement)

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“…The total hemispherical emissivity can be measured using radiometric [1][2][3][4][5][6] or calorimetric techniques . The calorimetric techniques are commonly used due to their simplicity and accuracy in both transient [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and steady-state measurements [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. The steady-state calorimetric technique uses various sample-heating methods, such as putting the samples at the bottom of a vacuum chamber and heating them from the back surface [26], suspending the samples with electrical heating wires [27][28][29][30] and using the hot-wire method with a ribbon-like sample electrically heated in a vacuum chamber with the center region with a nearly uniform t...…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurements of high-temperature total hemispherical emissivity and thermal conductivity using a steady-state calorimetric technique

Fu¹,

Tan²,

Duan³

2014

Meas. Sci. Technol.

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A method was developed to simultaneously measure the total hemispherical emissivity and the thermal conductivity of samples at high temperatures. The inverse problem to determine the emissivity and thermal conductivity from steady-state high-temperature calorimetric experiments was established based on models for these two quantities. The accuracy of the inverse solution was numerically analyzed for various noise levels for samples with various thermophysical properties. The simulation results illustrate that the calculation accuracies for the emissivity and thermal conductivity strongly depend on the proportions of the radiation and conduction heat fluxes in the strip sample arising from the temperature distributions in the sample. Steady-state high-temperature experiments with nickel samples were used to experimentally verify the method. The inverse solution results for the emissivity and thermal conductivity calculated from the measured data agree well with reported data in the literature. This research provides a useful reference for measuring the total hemispherical emissivity and thermal conductivity of conductive samples at high temperatures.

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