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A foam OTEC system

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  • Zener, Clarence
  • Greenstein, Martin

Abstract

Experiments are described which attempt to incorporate the main features of a foam OTEC System. These features include foam generation, foam rise, foam breaking, and finally separation of liquid and vapor. Our foam generator formed foam at rates as high as would be desired in a commercial plant, ~1 g/cm2 sec. The rise of the foam, accompanied by a drop in temperature, was as expected by theory. The foam breaking, and the subsequent separation of liquid and vapor, presented no problem. Totally unexpected was the dominant role played by the wall drag in our 4 in diameter, 30 ft high column. Experiments were consistent, however, with a very simple expression for the variation of the drag coefficient with the foam parameters of mass flow rate and density. For the large diameter columns envisioned for commercial plants, wall drag will play only a minor role.

Suggested Citation

  • Zener, Clarence & Greenstein, Martin, 1980. "A foam OTEC system," Energy, Elsevier, vol. 5(6), pages 503-509.
    • Handle: RePEc:eee:energy:v:5:y:1980:i:6:p:503-509
    DOI: 10.1016/0360-5442(80)90074-2
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