Calibration of high-heat-flux sensors in a solar furnace

Ballestrín, Jesús; Rodríguez-Alonso, M; Rodríguez, J.; Cañadas, Inmaculada; Barbero, Francisco Javier Roldán; Langley, Lawrence W.; Barnes, Adam

doi:10.1088/0026-1394/43/6/003

Cited by 17 publications

(6 citation statements)

References 10 publications

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“…It was calibrated with a 1100 K blackbody, whose spectrum does not correspond to the spectrum delivered by the HFSS. Theoretically, this spectrum mismatch may lead to overestimation of the flux of over 30% [19]. In practice, a calorimetric method is often used to correct the calibration [20,21], even though such methods can introduce new error sources of similar order.…”

Section: Suitability Of Flux Gauge Manufacturer's Calibration For Hfsmentioning

confidence: 99%

Experimental and numerical characterization of a new 45 kW_el multisource high-flux solar simulator

et al. 2016

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Abstract:The performance of a new high-flux solar simulator consisting of 18 × 2.5 kW el radiation modules has been evaluated. Grayscale images of the radiative flux distribution at the focus are acquired for each module individually using a water-cooled Lambertian target plate and a CCD camera. Raw images are corrected for dark current, normalized by the exposure time and calibrated with local absolute heat flux measurements to produce radiative flux maps with 180 µm resolution. The resulting measured peak flux is 1.0-1.5 ± 0.2 MW m −2 per radiation module and 21.7 ± 2 MW m −2 for the sum of all 18 radiation modules. Integrating the flux distribution for all 18 radiation modules over a circular area of 5 cm diameter yields a mean radiative flux of 3.8 MW m −2 and an incident radiative power of 7.5 kW. A Monte Carlo ray-tracing simulation of the simulator is calibrated with the experimental results. The agreement between experimental and numerical results is characterized in terms of a 4.2% difference in peak flux and correlation coefficients of 0.9990 and 0.9995 for the local and mean radial flux profiles, respectively. The best-fit simulation parameters include the lamp efficiency of 39.4% and the mirror surface error of 0.85 mrad. suns high-flux solar simulator based on an array of xenon arc lamps,"

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Section: Suitability Of Flux Gauge Manufacturer's Calibration For Hfsmentioning

confidence: 99%

Experimental and numerical characterization of a new 45 kW_el multisource high-flux solar simulator

et al. 2016

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“…The pixel grayscale value is related to incident radiative flux by a direct flux measurement, such as a circular foil heat flux gauge. One of the challenges in this approach is the calibration of the heat flux gauge considering the spectral characteristics of the absorptive coating [112,[115][116][117][118]. Calibration errors of up to 30% are possible if the spectral content of the source used to calibrate the gauge differs from the spectral distribution of the applied light source.…”

Section: à2mentioning

confidence: 99%

Review of Heat Transfer Research for Solar Thermochemical Applications

Lipiński¹,

Davidson

Haussener

et al. 2013

Journal of Thermal Science and Engineering Applications

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This article reviews the progress, challenges and opportunities in heat transfer research as applied to high-temperature thermochemical systems that use high-flux solar irradiation as the source of process heat. Selected pertinent areas such as radiative spectroscopy and tomography-based heat and mass characterization of heterogeneous media, kinetics of high-temperature heterogeneous reactions, heat and mass transfer modeling of solar thermochemical systems, and thermal measurements in high-temperature systems are presented, with brief discussions of their methods and example results from selected applications.

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“…For very high heat flux density measurements greater than 1000 kW · m −2 , such as for solar applications, Gardon-type gauges, radiometers, or calorimeters are calibrated against solar concentrating systems [3][4][5][6].…”

Section: Brief State Of the Artmentioning

confidence: 99%

New Vacuum Blackbody Cavity for Heat Flux Meter Calibration

et al. 2008

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In the field of thermal radiation measurements, blackbody cavities are commonly used as reference standards for the calibration of heat flux meters. Applying the energy balance equation to the closed system including the cavity and the sensor, it is possible to predict the heat flux density absorbed by the heat flux meter. Calibration procedures developed at Laboratoire National de Métrologie et d'Essais (LNE) in recent years have allowed us to propose practical solutions for heat flux meters working below 100 kW · m −2 . The best relative uncertainties (k = 2) over the range of (10-100) kW · m −2 vary from 1.7 % to 3 %. During previous studies, three major facilities were constructed, each one with the objective to respond to different technical problems considering the measuring principle of these heat flux sensors. Following this approach, the sensitivity of these meters to radiation, the sensitivity to radiation and convection, and also the influence of the size of the source or of the positioning of the sensor (horizontally, vertically, etc.) have been investigated. As an outcome of this recent experience, a new vacuum blackbody cavity has been set up. As well as the possibility to calibrate at very low irradiance, there are also some substantive improvements in heating, thermal performance, and calibration methodology. After a summary of the state of the art of calibration methods and their limits, the article presents the preliminary results of the characterization obtained with this new facility for which the objective is to reduce the uncertainties by at least a factor of two for heat flux densities lower than 20 kW · m −2 .

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Calibration of high-heat-flux sensors in a solar furnace

Cited by 17 publications

References 10 publications

Experimental and numerical characterization of a new 45 kW_el multisource high-flux solar simulator

Experimental and numerical characterization of a new 45 kW_el multisource high-flux solar simulator

Review of Heat Transfer Research for Solar Thermochemical Applications

New Vacuum Blackbody Cavity for Heat Flux Meter Calibration

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