A SPHERICAL RECEIVER-REACTOR WITH SPECULARLY REFLECTING INNER SURFACES FOR HIGH-TEMPERATURE SOLAR FURNACE APPLICATIONS

1990 ◽  
Author(s):  
Aldo Steinfeld ◽  
Edward A. Fletcher
Keyword(s):  
High Temperature ◽  
Solar Furnace

A New High-Flux Solar Furnace for High-Temperature Thermochemical Research

1999 ◽  
Vol 121 (1) ◽  
pp. 77-80 ◽  
Author(s):  
P. Haueter ◽  
T. Seitz ◽  
A. Steinfeld
Keyword(s):  
High Temperature ◽  
Peak Concentration ◽  
Optical Design ◽  
Operating Performance ◽  
Solar Fuels ◽  
Solar Furnace ◽  
High Flux ◽  
Thermochemical Processing ◽  
Design Characteristics ◽  
Concentration Ratios

A new high-flux solar furnace, capable of delivering up to 40kW at peak concentration ratios exceeding 5000, is operational at PSI. Its optical design characteristics, main engineering features, and operating performance are described. This solar concentrating facility will be used principally for investigating the thermochemical processing of solar fuels at temperatures as high as 2500 K.

Oxidation Mechanism of ZrB2-SiC Tested in a Solar Furnace above 2200°C

2010 ◽  
Vol 65 ◽  
pp. 124-129
Author(s):  
Anne-Sophie Andreani ◽  
Francis Rebillat ◽  
Angéline Poulon-Quintin
Keyword(s):  
High Temperature ◽  
Oxidation Mechanism ◽  
Complex Oxide ◽  
Heating System ◽  
Solar Furnace ◽  
Large Temperature ◽  
Material Surface ◽  
Large Set ◽  
Silica Layer ◽  
The Impact

The solar furnace is a heating system based on concentrated sunrays on the material surface. It is an original method for testing ultra-high-temperature ceramics (UHTC) at very high temperature (above 2200°C) in air with an exposure time of several minutes. In this study, the solar flux is 15.5 MW.m-2 with a homogeneous exposed surface of 10 mm2. A large temperature-time composition parameters space is covered producing a large set of oxidized samples. Massive cylindrical specimens of UHTC materials are prepared by spark plasma sintering at 1900°C under a pressure of 100 MPa for 5 minutes. Then, samples are tested in air from 1750°C up to 2400°C with dwell times varied from 1 to 5 min. During oxidation of ZrB2-SiC (20%vol) material, the formed and known complex oxide scale identified from literature is easily reproduced using this method. It consists of a thin outer silica layer and zirconia columnar layer with a region of SiC depleted zone in ZrB2 phase. The impact of the reduction of Si content is quantified and the coating ZrB2-20%vol SiC is tested as protection on C-C composite.

A High-Flux Solar Furnace for Undergraduate Engineering Education and High-Temperature Thermochemistry Research

2014 ◽  
Author(s):  
G. Scott Duncan ◽  
Shahin Nudehi ◽  
Robert Palumbo ◽  
Luke J. Venstrom
Keyword(s):  
High Temperature ◽  
Engineering Students ◽  
Optical Design ◽  
Solar Furnace ◽  
Undergraduate Engineering ◽  
Chemistry Research ◽  
Energy Science ◽  
Undergraduate Engineering Education ◽  
Motivating Factor ◽  
Engineering Pedagogy

The optical design and engineering features of a 10 kW solar furnace now operational at Valparaiso University are described. The solar furnace is anticipated to achieve a mean concentration ratio of 3000 suns over a 6 cm diameter focus. It will support high-temperature solar chemistry research and undergraduate engineering pedagogy. Many of the components of the solar furnace were designed and constructed by undergraduate engineering students. Some of these students cite their participation in the solar furnace project as the motivating factor for continuing to work in the area of energy science in industry or graduate school.

Application of Small Size Solar Furnace onto Preparation of Copper Oxide Thin Films by Sol-Gel Route

2016 ◽  
Vol 703 ◽  
pp. 209-213
Author(s):  
Takashi Ehara ◽  
Taichi Sasaki ◽  
Hiroo Motomiya
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
Copper Oxide ◽  
Thermal Annealing ◽  
Sol Gel ◽  
Solar Furnace ◽  
Acetate Solution ◽  
Oxide Thin Films ◽  
Gel Film ◽  
Pure Cu

In this manuscript, we will describe the preparation of copper oxide thin films by sol-gel route using solar furnace with area of about 1.5 m2 as a rapid thermal annealing apparatus. The gel films prepared by spin-coating of Cu acetate solution transferred to CuO or Cu2O films after thermal annealing for 1 min employing solar furnace consists of Fresnel lens. The result reveals that the solar furnace can provide enough energy to cause the high temperature reaction of sol-gel route copper oxide synthesis. In addition, the result displays that the solar furnace is preferable apparatus to carry out a kind of high temperature rapid annealing. The oxidization reaction of the gel films significantly depends on the structure of the gel films before annealing. In the case of the gel film which contains little CuO, the film becomes mixture of CuO and Cu2O after the annealing by solar furnace. In contrast, the gel film with CuO structure transferred to pure Cu2O film after the annealing.

Novel Rare Earth-Bearing Ultra-High-Temperature Ceramics Tested in a Solar Furnace Above 2,200 °C in Air

2013 ◽  
Vol 80 (3-4) ◽  
pp. 257-266 ◽  
Author(s):  
Francis Rebillat ◽  
Anne-Sophie Andreani ◽  
Angeline Poulon-Quintin
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Solar Furnace ◽  
Ultra High Temperature Ceramics ◽  
Ultra High Temperature

Behavior at High Temperature of Metallic Liners (Ta, Nb) Used in the Sandwich Cladding Material of the GFR

2014 ◽  
Vol 94 ◽  
pp. 17-22
Author(s):  
Ludovic Charpentier ◽  
Marianne Balat-Pichelin
Keyword(s):  
High Temperature ◽  
Fission Products ◽  
Solar Furnace ◽  
Helium Atmosphere ◽  
Nuclear Plants ◽  
Temperature Exposure ◽  
Sandwich Materials ◽  
Mechanical Strengths ◽  
Metallic Liner ◽  
Cladding Material

The Gas-cooled Fast-Reactor (GFR) is one of the system developed in the frame of the 4th generation of nuclear plants. The helium coolant may contain some residual oxidizing impurities that can oxidize the cladding material. A sandwich material with a metallic layer (Ta or Nb) inserted between two sheets of SiC/SiC composite is a promising cladding system of the nuclear fuel to support mechanical strengths, to retain fission products without blocking the neutrons. Nevertheless SiC may support active oxidation with production of gaseous SiO and CO and sublimation in accidental conditions for temperatures above 2000 K, so the aim of the following study is to firstly investigate the oxidation resistance of the metallic liner in extreme conditions, alone and then covered by the SiC/SiC composite. The High Pressure and Temperature Solar Reactor (REHPTS) was implemented at the focus of the 6 kW Odeillo solar furnace in order to reproduce in helium atmosphere the sudden and huge temperature increase that can occur in the case of a nuclear accident. XRD and SEM enabled to observe that the high temperature exposure favored the (211) preferential orientation of tantalum and that the amorphization of niobium occurs above 1500 K. Such changes may impact the properties of the cladding elements. Some sandwich materials made of one plate of metal covered with a SiC/SiC composite were also tested and a carburation of the metallic plates at 2200 K was observed.

High temperature solar furnace

Refractories ◽  
1961 ◽  
Vol 2 (9-10) ◽  
pp. 375-378
Author(s):  
M. G. Manvelyan ◽  
A. F. Melik-Akhnazarov ◽  
S. F. Rustambekyan ◽  
A. A. Badalyan
Keyword(s):  
High Temperature ◽  
Solar Furnace
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