Journal article
Experimental and Numerical Analyses of a Pressurized Air Receiver for Solar-Driven Gas Turbines
- Hischier, I. Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland
- Leumann, P. Department of Mechanical and Process Engineering, ETH Zürich, 8092 Zürich, Switzerland
- Steinfeld, A. Department of Mechanical and Process Engineering,ETH Zürich, 8092 Zürich, Switzerland; Solar Technology Laboratory, Paul Scherrer Institute, 5232 Villigen, Switzerland
- 2012-2-27
Published in:
- Journal of Solar Energy Engineering. - ASME International. - 2012, vol. 134, no. 2
English
A high-temperature pressurized air-based receiver for power generation via solar-driven gas turbines is experimentally examined and numerically modeled. It consists of an annular reticulate porous ceramic (RPC) foam concentric with an inner cylindrical cavity-receiver exposed to concentrated solar radiation. Absorbed heat is transferred by combined conduction, radiation, and convection to the pressurized air flowing across the RPC. The governing steady-state mass, momentum, and energy conservation equations are formulated and solved numerically by coupled finite volume and Monte Carlo techniques. Validation is accomplished with experimental results using a 3 kW solar receiver prototype subjected to average solar radiative fluxes at the CPC outlet in the range 1870–4360 kW m−2. Experimentation was carried out with air and helium as working fluids, heated from ambient temperature up to 1335 K at an absolute operating pressure of 5 bars. The validated model is then applied to optimize the receiver design for maximum solar energy conversion efficiency and to analyze the thermal performance of 100 kW and 1 MW scaled-up versions of the solar receiver.
- Language
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- English
- Open access status
- closed
- Identifiers
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- DOI 10.1115/1.4005446
- ISSN 0199-6231
- Persistent URL
- https://sonar.rero.ch/global/documents/291931
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