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contributor authorR. D. Skocypec
contributor authorR. E. Hogan
date accessioned2017-05-08T23:39:32Z
date available2017-05-08T23:39:32Z
date copyrightMay, 1992
date issued1992
identifier issn0199-6231
identifier otherJSEEDO-28237#112_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/110837
description abstractThe CAtalytically Enhanced Solar Absorption Receiver (CAESAR) is a 100 kWchemecal test reactor currently in operation. This type of high-temperature chemical reactor volumetrically absorbs concentrated solar energy throughout a catalytic porous absorber matrix volume, promoting heterogeneous reactions with fluid-phase reactant species flowing through the absorber. A numerical model of these reactors has been developed to provide guidance in the catalytic matrix design for CAESAR. In the CAESAR reactor, methane is reformed using carbon dioxide and a rhodium catalyst. In addition, the model is being used to evaluate both the reactor performance and test data. This paper presents the thermal and chemical characteristics of the reactor for varying incident solar flux, fluid mass flow, convective heat-transfer coefficient, solar and infrared extinction coefficients, and catalyst loading. Predicted CAESAR performance is based on a prototype absorber and anticipated operating conditions. Model results suggest the mass flux must be proportioned to the incident solar flux radial distribution to prevent unacceptably high local temperatures and to provide a reactor having more uniform exit conditions. Either the catalytic loading or geometric thickness of the absorber should be increased for conversion to approach equilibrium levels. Also, the optical density of the matrix (particularly at the sunlit side of the reactor) should be decreased to distribute solar energy more uniformly in depth and decrease matrix temperatures at the front of the absorber.
publisherThe American Society of Mechanical Engineers (ASME)
titleAnalysis of Catalytically Enhanced Solar Absorption Chemical Reactors: Part II—Predicted Characteristics of a 100 kWchemical Reactor
typeJournal Paper
journal volume114
journal issue2
journal titleJournal of Solar Energy Engineering
identifier doi10.1115/1.2929988
journal fristpage112
journal lastpage118
identifier eissn1528-8986
keywordsAbsorption
keywordsSolar energy
keywordsFluids
keywordsCatalysts
keywordsTemperature
keywordsHeat transfer
keywordsDensity
keywordsFlow (Dynamics)
keywordsEquilibrium (Physics)
keywordsEngineering prototypes
keywordsDesign
keywordsMethane
keywordsThickness
keywordsHigh temperature
keywordsComputer simulation AND Carbon dioxide
treeJournal of Solar Energy Engineering:;1992:;volume( 114 ):;issue: 002
contenttypeFulltext


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