scholarly journals Characterization of a Stirling cavity receiver performance in the KTH high-flux solar simulator and comparison with real Dish-Stirling data

2018 ◽  
Author(s):  
Jorge Garrido ◽  
Abdallah Abou-Taouk ◽  
Björn Laumert
Keyword(s):  
High Flux ◽  
Solar Simulator ◽  
Receiver Performance

Design and characterization of a high-flux non-coaxial concentrating solar simulator

2018 ◽  
Vol 145 ◽  
pp. 201-211 ◽  
Author(s):  
Jun Xiao ◽  
Xiudong Wei ◽  
Raúl Navío Gilaber ◽  
Yan Zhang ◽  
Zengyao Li
Keyword(s):  
High Flux ◽  
Solar Simulator

scholarly journals Characterization of a New 10 kWe High Flux Solar Simulator Via Indirect Radiation Mapping Technique

2019 ◽  
Vol 141 (2) ◽  
Author(s):  
Mostafa Abuseada ◽  
Cédric Ophoff ◽  
Nesrin Ozalp
Keyword(s):  
Heat Flux ◽  
Complementary Metal Oxide Semiconductor ◽  
Threshold Value ◽  
Oxide Semiconductor ◽  
Total Power ◽  
Mapping Technique ◽  
High Flux ◽  
Solar Simulator ◽  
A New Technique

This paper presents characterization of a new high flux solar simulator consisting of a 10 kW Xenon arc via indirect heat flux mapping technique for solar thermochemical applications. The method incorporates the use of a heat flux gauge (HFG), single Lambertian target, complementary metal oxide semiconductor (CMOS) camera, and three-axis optical alignment assembly. The grayscale values are correlated to heat flux values for faster optimization and characterization of the radiation source. Unlike previous work in heat flux characterization that rely on two Lambertian targets, this study implements the use of a single target to eliminate possible errors due to interchanging the targets. The current supplied to the simulator was varied within the range of 120–200 A to change the total power and to mimic the fluctuation in sun's irradiance. Several characteristic parameters of the simulator were studied, including the temporal instability and radial nonuniformity (RNU). In addition, a sensitivity analysis was performed on the number of images captured, which showed a threshold value of at least 30 images for essentially accurate results. The results showed that the flux distribution obtained on a 10 × 10 cm2 target had a peak flux of 6990 kWm−2, total power of 3.49 kW, and half width of 6.25 mm. The study concludes with the illustration and use of a new technique, the merging method, that allows characterization of heat flux distributions on larger areas, which is a promising addition to the present heat flux characterization techniques.

Spectral Characterization of PSI’s High-Flux Solar Simulator

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Ivo Alxneit ◽  
Henri Schmit
Keyword(s):  
Radial Distance ◽  
Wavelength Region ◽  
Spectral Characterization ◽  
Emission Lines ◽  
Characteristic Line ◽  
High Flux ◽  
Solar Simulator ◽  
Short Wavelength Region ◽  
Relative Contribution

In this publication, the detailed spectral characterization of the concentrated radiation of PSI’s 50 kW xenon arc lamp based solar simulator (HFSS) is reported. Spectra are presented for the range of 350–1600 nm recorded at different radial distances from the position of maximum concentration, i.e., from the center of the spot. The analysis shows that the relative intensity of the short wavelength region decreases with increasing radial distance from the center of the spot. At the same time, the relative contribution of the xenon emission lines increases. All spectra can be decomposed into a broad background described by a blackbody spectrum with a temperature of T = 6000 ± 200 K and the characteristic line spectrum of xenon.

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

2016 ◽  
Vol 24 (22) ◽  
pp. A1360 ◽  
Author(s):  
Gaël Levêque ◽  
Roman Bader ◽  
Wojciech Lipiński ◽  
Sophia Haussener
Keyword(s):  
High Flux ◽  
Solar Simulator ◽  
Numerical Characterization

Characterization of a 6 kW high-flux solar simulator with an array of xenon arc lamps capable of concentrations of nearly 5000 suns

2015 ◽  
Vol 86 (12) ◽  
pp. 125107 ◽  
Author(s):  
Robert Gill ◽  
Evan Bush ◽  
Philipp Haueter ◽  
Peter Loutzenhiser
Keyword(s):  
High Flux ◽  
Solar Simulator

Characterization of the KTH high-flux solar simulator combining three measurement methods

Energy ◽  
2017 ◽  
Vol 141 ◽  
pp. 2091-2099 ◽  
Author(s):  
Jorge Garrido ◽  
Lukas Aichmayer ◽  
Wujun Wang ◽  
Björn Laumert
Keyword(s):  
Measurement Methods ◽  
High Flux ◽  
Solar Simulator

Numerical Characterization of a High Flux Solar Simulator Using Forward and Inverse Methods

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Mostafa Abuseada ◽  
Nesrin Ozalp
Keyword(s):  
Heat Flux ◽  
Ray Tracing ◽  
Focal Plane ◽  
High Flux ◽  
Solar Simulator ◽  
New Approach ◽  
First Order ◽  
Numerical Characterization ◽  
Tracing Method

Abstract The numerical characterization of a 10 kWe xenon arc high flux solar simulator is thoroughly presented and performed using two approaches: a forward Monte Carlo ray tracing (MCRT) method and an inverse ray tracing method. Experimental characterization was previously performed for the solar simulator using an indirect flux mapping technique, where the experimental heat flux distribution was obtained at the focal plane and additional 12 planes away from the simulator. For the first numerical characterization method, an in-house MCRT code was used to determine the shape of the xenon arc to best model the simulator. It was determined that an isotropic volumetric source consisting of a hemisphere of 1 mm radius that is attached to a cylinder of 1 mm in radius and 10 mm in length well described the experimental results obtained. The in-house code was then used to generate heat flux maps similar to that obtained experimentally and determine the intensity at the focal plane to be used by the inverse ray tracing method presented for its validation. For the inverse method, intensity interpolation schemes of zeroth and first-order were examined in addition to different solution strategies. It is shown that a first-order interpolation scheme unnecessary complicates the inverse problem, leading to larger errors. In addition, a new approach of constraining the formulated system of equations with an equality constraint that works by eliminating intensity values not tracing back to the ellipsoidal reflector is proposed. This new approach provided intensity values with reduced percentage errors.

scholarly journals Design, Modeling, and Characterization of a 10 kWe Metal Halide High Flux Solar Simulator

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Nathan P. Siegel ◽  
Jeffrey P. Roba
Keyword(s):  
Metal Halide ◽  
Transfer Efficiency ◽  
Total Power ◽  
Normal Vector ◽  
High Flux ◽  
Hardware Cost ◽  
Solar Simulator ◽  
Peak Flux ◽  
Optical Flux

We present the design and characterization of a high flux solar simulator (HFSS) based on metal halide lamps and built from commercially available components. The HFSS that we present was developed to support the evaluation of a solar thermochemical reactor prototype. The HFSS consists of an array of four independent lamp/reflector modules aimed at a common target location. Each module contains one 2500 We lamp and one electroformed ellipsoidal reflector having an interfocal distance of 813 mm. The modules are oriented with an angle relative to the target surface normal vector of 24.5 deg. Design simulations predicted that the peak flux of this HFSS would be 2980 kWth/m2, with a total power delivered to a 6-cm target of 3.3 kWth, for a transfer efficiency of 33.3%. Experimental characterization of the HFSS using optical flux mapping and calorimetry showed that the peak flux at the focal plane reached 2890±170 kWth/m2, while the total power delivered was 3.5±0.21 kWth for a transfer efficiency of 35.3%. The HFSS was built at a material cost of ∼$2700.00/module and a total hardware cost of ∼$11,000.00 for the four-lamp array. A seven-lamp version of this HFSS is predicted to deliver 5.6 kWth to a 6 cm diameter target at a peak flux of 4900 kWth/m2 at a hardware cost of ∼$19,000.00 ($3400.00/kWth delivered, $1100.00/kWe).

Design of a New 45 kWe High-Flux Solar Simulator for High-Temperature Solar Thermal and Thermo-Chemical Research

2010 ◽  
Author(s):  
Katherine R. Krueger ◽  
Jane H. Davidson ◽  
Wojciech Lipin´ski
Keyword(s):  
High Temperature ◽  
Focal Plane ◽  
Flux Distribution ◽  
Solar Thermal ◽  
Optimized Design ◽  
High Flux ◽  
Chemical Research ◽  
Solar Simulator ◽  
Peak Flux ◽  
The Common

In this paper, we present a systematic procedure to design a solar simulator for high-temperature concentrated solar thermal and thermo-chemical research. The 45 kWe simulator consists of seven identical radiation units of common focus, each comprised of a 6.5 kWe xenon arc lamp close-coupled to a precision reflector in the shape of a truncated ellipsoid. The size and shape of each reflector is optimized by a Monte Carlo ray tracing analysis to achieve multiple design objectives, including high transfer efficiency of radiation from the lamps to the common focal plane and desired flux distribution. Based on the numerical results, the final optimized design will deliver 7.5 kW over a 6-cm diameter circular disc located in the focal plane, with a peak flux approaching 3.7 MW/m2.

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