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Keywords: furnaces
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Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2011, 133(4): 041013.
Published Online: October 18, 2011
... of a concentrating solar furnace. This study establishes how cathode material, solvent, current levels, and operating temperature influence the electrolytic cell’s performance. For a nominal current density of 0.1 A cm − 2 at temperatures from 1275 to 1425 K, we found that our performance parameters, the back work...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. May 2011, 133(2): 021010.
Published Online: April 7, 2011
... simulation results and measurements of the heat exchanger prototype. It includes sand flow behavior and experience with different porous walls as well as up-scaling options. 03 12 2009 25 10 2010 07 04 2011 07 04 2011 furnaces heat exchangers high-temperature techniques power...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2010, 132(1): 011007.
Published Online: December 21, 2009
... from a solar furnace, the method significantly decreased the difference in the temperature measurements of two single color pyrometers. Simulated temperature data with both random noise and systematic errors are used to demonstrate that the method successfully converges to surface emissivity values...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2008, 130(4): 041010.
Published Online: September 8, 2008
... and residence time on hydrogen conversion was measured for furnace set point temperatures of 1023 K and 1073 K . The yield of ZnO aerosol was measured in situ using a scanning differential mobility sizer. The composition and morphology of the solid product were characterized with X-ray diffraction...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2007, 129(4): 412–415.
Published Online: March 20, 2007
...J. M. Badie; L. Cassan; B. Granier; S. Agudelo Florez; F. Chejne Janna Temperature measurements of the gas phase surrounding the hot front during material processing at the focus of a high concentration solar furnace can be achieved by coupled emission and absorption optical spectroscopy...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. May 2007, 129(2): 141–146.
Published Online: July 8, 2006
...Charles W. Forsberg; Per F. Peterson; Haihua Zhao Liquid-fluoride-salt heat transfer fluids are proposed to raise the heat-to-electricity efficiencies of solar power towers to about 50%. The liquid salt would deliver heat from the solar furnace at temperatures between 700 ° C and 850 ° C...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2006, 128(1): 8–15.
Published Online: June 20, 2005
... in a solar furnace. The objective was to generate input data which are necessary for designing the scaled up reactor, such as the effect of process temperature ( 1100 - 1300 ° C ) and carrier gas ( N 2 and CO) on the overall reaction rate. Furthermore, construction materials were tested and a variety...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. February 2004, 126(1): 645–653.
Published Online: February 12, 2004
... of solar-blind conditions and experimental measurements that have been carried out at the Odeillo Solar Furnace (IMP-CNRS). The aim here is to test different experimental configurations that can conceptually eliminate the reflected part of the concentrated solar flux. These configurations would allow near...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2003, 125(2): 152–158.
Published Online: May 8, 2003
... emissivity have an impact on these measurements. As an approach to solve this problem, we developed a new system that uses the UV-B wavelength range for pyrometry. Simulations and measurements on blackbodies and on real hot bodies heated in the DLR Solar Furnace specified the final measurement wavelength...
Journal Articles
Article Type: Technical Briefs
J. Sol. Energy Eng. August 2001, 123(3): 251–255.
Published Online: March 1, 2001
...Jens Kaluza and; Andreas Neumann At the DLR Solar Furnace, calorimeters or circular foil radiometers are used for calibrating video camera based flux mapping systems. For many years, we have been investigating the accuracy of these devices and have undertaken several efforts to check...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. February 2002, 124(1): 22–27.
Published Online: March 1, 2001
.... This approach is based on two main criteria: Our test results for intermediate scale operation at 50 kW, which support the methodology used for scaling the process up from 2 kW, are reported below. Laplaze et al. 15 reported the first results obtained at CNRS Odeillo solar furnace. A 6 mm o.d...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. August 2001, 123(3): 237–243.
Published Online: February 1, 2001
...Stefan Kra¨upl; Aldo Steinfeld The co-production of Zn and synthesis gas by the combined reduction of ZnO and reforming of CH 4 has been performed using a vortex-flow chemical reactor in a high-flux solar furnace. The reactor operating temperature ranged between 1221 and 1481 K for an input solar...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 164–170.
Published Online: January 1, 2001
..., proportional to 1 − ε ¯ / ε ¯ as indicated by Eq. ( 15 ). Since the solar-blind principle is founded on the absorption of solar light by the atmosphere an estimate of the consequences of this effect on the measurement in the solar furnace on the ground must be discussed. A light...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 153–159.
Published Online: January 1, 2001
...T. Guillard; G. Flamant; D. Laplaze Experimental results with a 2 kW solar furnace, in a wide range of vaporization rates (0.1–4 g/h), under variable pressure and flow rate of argon, are used with numerical simulation to define key parameters for large scale synthesis of fullerenes with solar...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 117–124.
Published Online: January 1, 2001
...Karl-Heinz Funken; Martin Roeb; Peter Schwarzboezl; Heiko Warnecke To check the feasibility of solar thermal remelting of aluminum scrap a directly absorbing rotary kiln receiver-reactor was constructed for experimentation in a mini-plant scale in the DLR high flux solar furnace. Conventionally...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 125–132.
Published Online: December 1, 2000
... about a third of the energy contained in the fuel used to generate electricity enters the process. Thus, for materials produced electrolytically or in an electric furnace, the energy cost dominates the cost of the final product. By contrast, highly-concentrated solar energy is capable of supplying large...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 98–101.
Published Online: November 1, 2000
...Anke Weidenkaff; Armin Reller; Aldo Steinfeld The thermal extraction of zinc from its ore willemite, Zn 2 SiO 4 , is investigated using concentrated solar energy. Experiments conducted at above 1750 K in a high-flux solar furnace yielded the products Zn(g), O 2 , and SiO 2 l . The most important...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 133–137.
Published Online: November 1, 2000
... conditions was established by using a pulsed-feed of methane to carry out the particles of ZnO. Using this technique, nearly stoichiometric operation was demonstrated with a prototype reactor in a high-flux solar furnace, thereby opening up a means for efficient conversion of sunlight into chemical fuels...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2001, 123(2): 109–116.
Published Online: November 1, 2000
... ENGINEERING . Manuscript received by the ASME Solar Energy Division, Apr. 2000; final revision, Nov. 2000. Associate Editor: D. M. Blake. 01 Apr 2000 01 Nov 2000 solar absorber-convertors solar heating furnaces solar energy concentrators photochemistry graphitisation transition...