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A non-tubular Stirling engine heater for a micro solar power unit

Author

Listed:
  • García, D.
  • Prieto, J.I.

Abstract

This paper presents a non-tubular heat exchanger for use in a Stirling solar engine micro co-generation unit that is being developed by the University of Oviedo and the technological research centre Tekniker Foundation. The engine has been designed using scaling criteria, which imply a case of relaxed dynamic similarity, that is to say, without preserving the equality among all of the prototype’s and the derivative’s dimensionless groups. The geometrical characteristics of the heater are described and the variables that can influence the pressure drop and heat transfer in the heater are identified. The correlations for the friction factor and Stanton number have been measured under steady flow conditions to analyse the feasibility of the experimental heater. The Reynolds analogy is not fulfilled, and the compressibility effects are negligible. The comparison between the correlation predictions for the non-tubular heater and slotted or tubular heaters of well-known prototypes shows possible applications for heaters that reach high Reynolds numbers and that encounter practical problems associated with the use of bundles of tubes.

Suggested Citation

  • García, D. & Prieto, J.I., 2012. "A non-tubular Stirling engine heater for a micro solar power unit," Renewable Energy, Elsevier, vol. 46(C), pages 127-136.
    • Handle: RePEc:eee:renene:v:46:y:2012:i:c:p:127-136
    DOI: 10.1016/j.renene.2012.03.025
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    Citations

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    Cited by:

    1. García, D. & González, M.A. & Prieto, J.I. & Herrero, S. & López, S. & Mesonero, I. & Villasante, C., 2014. "Characterization of the power and efficiency of Stirling engine subsystems," Applied Energy, Elsevier, vol. 121(C), pages 51-63.
    2. David García & María-José Suárez & Eduardo Blanco & Jesús-Ignacio Prieto, 2022. "Experimental and Numerical Characterisation of a Non-Tubular Stirling Engine Heater for Biomass Applications," Sustainability, MDPI, vol. 14(24), pages 1-17, December.
    3. Raj Kumar & Erdem Cuce & Sushil Kumar & Sashank Thapa & Paras Gupta & Bhaskar Goel & C. Ahamed Saleel & Saboor Shaik, 2022. "Assessment of the Thermo-Hydraulic Efficiency of an Indoor-Designed Jet Impingement Solar Thermal Collector Roughened with Single Discrete Arc-Shaped Ribs," Sustainability, MDPI, vol. 14(6), pages 1-18, March.
    4. Costa, Sol-Carolina & Tutar, Mustafa & Barreno, Igor & Esnaola, Jon-Ander & Barrutia, Haritz & García, David & González, Miguel-Angel & Prieto, Jesús-Ignacio, 2014. "Experimental and numerical flow investigation of Stirling engine regenerator," Energy, Elsevier, vol. 72(C), pages 800-812.

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