Indirectly Irradiated Solar Receiver-Reactors for High-Temperature Thermochemical Processes
Author:
Wieckert Christian1, Meier Anton1, Steinfeld Aldo2
Affiliation:
1. Solar Process Technology, Paul Scherrer Institute, CH-5232 Villigen, Switzerland 2. ETH-Swiss Federal Institute of Technology, Department of Mechanical and Process Engineering-Institute of Energy Technology, ETH-Zentrum, CH-8092 Zurich, Switzerland
Abstract
A solar receiver-reactor concept for high-temperature thermochemical applications involving gas and condensed phases is presented. It features two cavities in series. The inner cavity is an enclosure, e.g., made of graphite, with a small aperture to let in concentrated solar power. It serves as the solar receiver, radiant absorber, and radiant emitter. The outer cavity is a well-insulated enclosure containing the inner cavity. It serves as the reaction chamber and is subjected to thermal radiation from the inner cavity. The advantages of such a two-cavity reactor concept are outlined. A radiation heat transfer analysis based on the radiosity enclosure theory is formulated and results are presented in the form of generic curves that indicate the design constraints. High energy absorption efficiency can be achieved by minimizing the aperture area, by maximizing the size of the inner cavity and by constructing it from a material of high emissivity.
Publisher
ASME International
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
Reference7 articles.
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22 articles.
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