We have designed and tested a prototype dish/Stirling hybrid-receiver combustion system. The system consists of a pre-mixed natural-gas burner heating a pin-finned sodium heat pipe. The design emphasizes simplicity, low cost, and ruggedness. Our test was on a 1/6th-scale device, with a nominal firing rate of 18kWt, a power throughput of 13kWt, and a sodium vapor temperature of 750°C. The air/fuel mixture was electrically preheated to 640°C to simulate recuperation. The test rig was instrumented for temperatures, pressures, flow rates, overall leak rate, and exhaust emissions. The data verify our burner and heat-transfer models. Performance and post-test examinations validate our choice of materials and fabrication methods.Based on the 1/6th -scale results, we are designing a full-scale hybrid receiver. This is a fully-integrated system, including burner, pin-fin primary heat exchanger, recuperator (in place of the electrical pre-heater used in the prototype system), solar absorber, and sodium heat pipe. The major challenges of the design are to avoid pre-ignition, achieve robust heat-pipe performance, and attain long life of the burner matrix, recuperator, and flue-gas seals. We have used computational fluid dynamics extensively in designing to avoid pre-ignition and for designing the heat-pipe wick, and we have used individual component tests and results of the 1/6th -scale test to optimize for long life.Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000.In this paper, we present our design philosophy and basic details of our design. We describe the sub-scale test rig and compare test results with predictions. Finally, we outline the evolution of our full-scale design, and present its current status.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Dish/Stirling Hybrid-Receiver Sub-Scale Tests and Full-Scale Design


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    34th Intersociety Energy Conversion Engineering Conference ; 1999



    Publication date :

    1999-08-02




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Reflux Heat-Pipe Solar Receiver for a Stirling Dish-Electric System*

    Ziph, B. / Godett, T. M. / Diver, R. B. | AIAA | 1987


    Concave receiver for stirling dish and method for manufacturing the same

    NUÑEZ BOOTELLO JUAN PABLO / SOSA NARANJO CRISTINA / MONNE BAILO CARLOS MIGUEL et al. | European Patent Office | 2015

    Free access

    Potential der Dish-Stirling Technologie

    Schiel, Wolfgang / Deutsche Forschungsanstalt für Luft- und Raumfahrt | TIBKAT | 1987



    A Direct-Heating Energy-Storage Receiver for Dish-Stirling Solar Energy Systems

    Lund, K. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1994