Title

Numerical Study of Nozzle Design on Cadmium Quenching Process in Thermochemical Splitting of Water

Document Type

Conference Proceeding

Publication Date

11-13-2010

Publication Title

ASME International Mechanical Engineering Congress and Exposition, Proceedings

Publisher

ASME

Volume

6

First page number:

203

Last page number:

210

Abstract

Three-dimensional liquid-gas flow with condensation during cadmium quenching process for hydrogen production was numerically simulated in order to effectively guide the design of solar decomposer and vapor quencher. The mixture model was selected for modeling the multiphase flow, and the two-equation RNG k-ε model was used to model the turbulent flow and heat transfer. Numerical results including velocity, temperature, pressure, and mole fraction distributions were obtained for different nozzle designs. Numerical results showed that flow is relatively low in the decomposer and close to the bottom and the top inlets. The maximum velocity develops in the region near the entrance of the quenching nozzle as the nozzle angle is small. As the nozzle angle is large, the maximum velocity appears in the exit tube. Temperature, pressure and cadmium vapor distributions are also directly affected by the nozzle angle.

Keywords

Cadmium – Quenching; Fluid dynamics; Hydrogen as fuel; Nozzles – Design; Nozzles – Fluid dynamics; Turbulence

Disciplines

Energy Systems | Fluid Dynamics | Mechanical Engineering | Oil, Gas, and Energy

Language

English

Comments

Conference held: Lake Buena Vista, Florida, USA, November 13–19, 2009

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Identifier

DOI: http://dx.doi.org/10.1115/IMECE2009-12862; ISBN: 978-0-7918-4379-6; eISBN: 978-0-7918-3863-1

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