An emissometer with high accuracy for determination of the total hemispherical emittance of surfaces
- 1 August 1980
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 13 (8) , 873-876
- https://doi.org/10.1088/0022-3735/13/8/018
Abstract
To determine the total hemispherical emittance epsilon h of surfaces, a calorimetric emissometer has been designed and built. In this emissometer an electrically heated specimen with unknown emittance is placed opposite a large, liquid nitrogen-cooled black receiver surface. When thermal equilibrium is reached, the radiated heat flux from the specimen to the receiver almost equals the supplied electrical power.Keywords
This publication has 4 references indexed in Scilit:
- An automated calorimeter for the temperature range 80-320K without the use of a computerJournal of Physics E: Scientific Instruments, 1979
- Calorimetric emissivities for solar-selective coatings on flat sheetJournal of Physics E: Scientific Instruments, 1979
- The measurement of optical properties of selective surfaces using a solar calorimeterSolar Energy, 1978
- Solar absorptance and emittance properties of several solar coatingsJournal of Vacuum Science and Technology, 1976