Solar Blind Pyrometer Temperature Measurements in High Temperature Solar Thermal Reactors: A Method for Correcting the System-Sensor Cavity Reflection Error

[+] Author and Article Information
Aaron P. Freid, Paul K. Johnson, Julie E. Steinbrenner

Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA

Manuela Musella, Reto Müller

Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

Robert D. Palumbo

Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, and Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

J. Sol. Energy Eng 127(1), 86-93 (Feb 07, 2005) (8 pages) doi:10.1115/1.1796992 History: Received March 16, 2004; Revised June 24, 2004; Online February 07, 2005
Copyright © 2004 by ASME
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Grahic Jump Location
Geometry of the reactor cavity and the high and low temperature profiles used in the simulation. Dimensions are in mm. The reactor schematic also shows how the reactor’s inside surface was divided into rings both for the experimental campaign and the numerical simulations. The location of rings for which temperature measurements were made with the pyrometer are labeled “Reading” and the rings where the thermocouples were located are labeled TC.
Grahic Jump Location
Normal spectral emittance for ZrO2 at 1.4 μm vs. temperature. Data was taken from Ref. 27.
Grahic Jump Location
Photograph of the pyrometer and solar reactor. A stepper motor (1) swings the aluminum beam (2) such that the pyrometer (3) is positioned in front (left side) of the reactor.
Grahic Jump Location
Sampling of experimental results illustrating the importance of the reflection error associated with pyrometer temperature measurements inside a solar reactor insulated with ZrO2 felt. Experiments 1,2,3,4 were conducted with a quartz window closing the cavity. Experiment 5, was conducted without a window.



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